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You searched for: Publication Year 2007 Remove constraint Publication Year: 2007 Subject term allometry Remove constraint Subject term: allometry Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
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1. Above- and belowground biomass of Artemisia ordosica communities in three contrasting habitats of the Mu Us desert, northern China

Author:
Li, C.P.; Xiao, C.W.
Source:
Journal of arid environments 2007 v.70 no.2 pp. 195-207
ISSN:
0140-1963
Subject:
Artemisia; plant growth; arid zones; dunes; shrubs; equations; allometry; dry environmental conditions; microhabitats; deserts; branches; dry matter partitioning; roots; leaves; China
DOI:
10.1016/j.jaridenv.2006.12.017

2. Acquisition of particle processing capability in juvenile oyster Crassostrea gigas: ontogeny of gill mucocytes

Author:
Rozenn Cannuel; Peter G. Beninger
Source:
Marine biology 2007 v.151 no.3 pp. 897-905
ISSN:
0025-3162
Subject:
Crassostrea gigas; adults; allometry; cilia; juveniles; mortality; mucus; ontogeny; oysters; postlarvae; rearing; secretion; viscosity
Abstract:
... Acquisition of particle processing capability in postlarval oysters depends upon the structural development of the pallial organs, as well as the development of cilia and mucocytes used (either directly or indirectly) in particle capture and transport. Mucocyte mapping was therefore used to identify mucocyte types and distributions throughout gill development in juvenile oyster Crassostrea gigas ( ...
DOI:
10.1007/s00227-006-0526-7

3. Allometric exponents do not support a universal metabolic allometry

Author:
White, C.R.; Cassey, P.; Blackburn, T.M.
Source:
Ecology 2007 v.88 no.2 pp. 315-323
ISSN:
0012-9658
Subject:
metabolism; exercise; meta-analysis; allometry; body weight; phylogeny; least squares; models; body size
DOI:
10.1890/05-1883
PubMed:
17479750

4. Allometric methodology for the calculation of biokinetic parameters for marine biota

Author:
Vives Batlle, J.; Wilson, R.C.; McDonald, P.
Source:
Science of the total environment 2007 v.388 no.1-3 pp. 256-269
ISSN:
0048-9697
Subject:
macroalgae; plutonium; methodology; fish; Mollusca; zooplankton; radionuclides; cesium; iodine; half life; water pollution; phytoplankton; simulation models; bioaccumulation; indicator species; equations; technetium; pollutants; pharmacokinetics; Crustacea; americium; allometry
Abstract:
... Biological half-lives of elimination (TB1/2) and concentration factors (CF) for different radionuclides and marine organisms were analysed. Tests were carried out in order to investigate the cases in which these parameters can be described by a simple power equation as a function of the volume of the organism, to verify the hypothesis of allometric scaling. Statistically significant trends were fo ...
DOI:
10.1016/j.scitotenv.2007.07.048

5. Allometric relationships between seed mass and seedling characteristics reveal trade-offs for neotropical gap-dependent species

Author:
Matthew I. Daws; Christopher Ballard; Christopher E. Mullins; Nancy C. Garwood; Brian Murray; Timothy R. H. Pearson; David F. R. P. Burslem
Source:
Oecologia 2007 v.154 no.3 pp. 445-454
ISSN:
0029-8549
Subject:
seedling growth; seedlings; trees; roots; shoots; tropics; transpiration; wet season; leaves; dry season; solar radiation; energy; soil water; root growth; seedling emergence; seed germination; probability; allometry; endosperm; rain; death; drying
Abstract:
... A seed size–seed number trade-off exists because smaller seeds are produced in greater number but have a lower probability of establishment. This reduced establishment success of smaller-seeded species may be determined by biophysical constraints imposed by scaling rules. Root and shoot diameter, root growth extension rate (R GER) and shoot length at death for dark-grown seedlings are predicted to ...
DOI:
10.1007/s00442-007-0848-2
PubMed:
17846798

6. Allometry and functional constraints on proboscis lengths in butterflies

Author:
KUNTE, K.
Source:
Functional ecology 2007 v.21 no.5 pp. 982-987
ISSN:
0269-8463
Subject:
Lantana; Wedelia; allometry; body length; butterflies; evolution; flowers; nectar; nectar plants; pollination; proboscis
Abstract:
... 1. In generalist nectar-feeding insects such as butterflies, body size and proboscis length show an allometric relationship. Butterflies that deviate from this relationship and have disproportionately long proboscides can access nectar from deep flowers, which is inaccessible to species of similar or larger body size but with shorter proboscides. 2. Despite this selective advantage, few species po ...
DOI:
10.1111/j.1365-2435.2007.01299.x

7. Allometry and partitioning of above- and belowground tree biomass in an age-sequence of white pine forests

Author:
Peichi, M.; Arain, M.A.
Source:
Forest ecology and management 2007 v.253 no.1-3 pp. 68-80
ISSN:
0378-1127
Subject:
tree growth; forest trees; underground parts; tree age; allometry; temperate forests; equations; coniferous forests; tree and stand measurements; forest stands; Pinus strobus; statistical analysis; even-aged stands; branches; dry matter partitioning; roots; leaves; Ontario
DOI:
10.1016/j.foreco.2007.07.003

8. Amphibian lipid levels at metamorphosis correlate to post-metamorphic terrestrial survival

Author:
Scott, David E.; Casey, Erin D.; Donovan, Michele F.; Lynch, Tracy K.
Source:
Oecologia 2007 v.153 no.3 pp. 521-532
ISSN:
0029-8549
Subject:
Ambystoma; Rana; adults; allometry; aquatic environment; body size; breeding; energy; fat body; fences; frogs; habitats; interspecific variation; juveniles; larvae; larval development; metamorphosis; mortality; ponds; rain; regression analysis; salamanders and newts
Abstract:
... In organisms that have complex life cycles, factors in the larval environment may affect both larval and adult traits. For amphibians, the postmetamorphic transition from the aquatic environment to terrestrial habitat may be a period of high juvenile mortality. We hypothesized that lipid stores at metamorphosis may affect an animal's success during this critical transition period. We examined vari ...
DOI:
10.1007/s00442-007-0755-6
PubMed:
17530291

9. Application of real-time ultrasound technology to estimate in vivo breast muscle weight of broiler chickens

Author:
Oviedo-Rondón, E.O.; Parker, J.; Clemente-Hernández, S.
Source:
British poultry science 2007 v.48 no.2 pp. 154-161
ISSN:
0007-1668
Subject:
broiler chickens; estimation; carcass yield; mathematical models; breast muscle; chicken breeds; dressing percentage; equations; allometry; carcass weight; gender differences; body composition; nondestructive methods; genotype; tissue weight; animal age; chicken carcasses; ultrasonography
DOI:
10.1080/00071660701247822
PubMed:
17453806

10. Assessing the above-ground biomass of a complex tropical rainforest using a canopy crane

Author:
LIDDELL, MICHAEL J.; NIEULLET, NICOLAS; CAMPOE, OTÁVIO C.; FREIBERG, MARTIN
Source:
Austral ecology 2007 v.32 no.1 pp. 43-58
ISSN:
1442-9985
Subject:
Alstonia scholaris; Arecaceae; Cleistanthus; Endiandra; Euphorbiaceae; Myristica; Myrtaceae; aboveground biomass; allometry; canopy; databases; equations; forest types; mesophyll; tree and stand measurements; trees; tropical rain forests; vines; Australia; Brazil; French Guiana; New Guinea; Panama
Abstract:
... Current estimates of the total biomass in tropical rainforests vary considerably; this is due in large part to the different approaches that are used to calculate biomass. In this study we have used a canopy crane to measure the tree architectures in a 1 ha plot of complex mesophyll vine forest at Cape Tribulation, Australia. Methods were developed to measure and calculate the crown and stem bioma ...
DOI:
10.1111/j.1442-9993.2007.01736.x

11. Body and scale growth of wild Atlantic salmon smolts during seaward emigration

Author:
Dietrich, Jason P.; Cunjak, Richard A.
Source:
Environmental biology of fishes 2007 v.80 no.4 pp. 495-501
ISSN:
0378-1909
Subject:
Salmo salar; allometry; body size; smolts
Abstract:
... The relationship between scale and body growth for emigrating Atlantic salmon, Salmo salar, smolts was previously not understood and therefore was examined in this study using mark-recapture techniques. The size of smolts at time of recapture was significantly greater than when marked (P = 0.0002). The growth in length of smolts emigrating 5 km over an average of 20 days was 7.7 ± 6.1 mm per day. ...
DOI:
10.1007/s10641-006-9147-8

12. Comparative height-crown allometry and mechanical design in 22 tree species of Kuala Belalong rainforest, Brunei, Borneo

Author:
Osunkoya, Olusegun O.; Omar-Ali, Kharunnisa; Amit, Norratna; Dayan, Juita; Daud, Dayanawati S.; Sheng, Tan K.
Source:
American journal of botany 2007 v.94 no.12 pp. 1951-1962
ISSN:
0002-9122
Subject:
allometry; canopy; forest trees; rain forests; tree and stand measurements; wood density; Brunei
Abstract:
... In rainforests, trunk size, strength, crown position, and geometry of a tree affect light interception and the likelihood of mechanical failure. Allometric relationships of tree diameter, wood density, and crown architecture vs. height are described for a diverse range of rainforest trees in Brunei, northern Borneo. The understory species follow a geometric model in their diameter-height relations ...
DOI:
10.3732/ajb.94.12.1951
PubMed:
21636390

13. Comparison of absolute and relative growth patterns among five Pinna nobilis populations along the Tunisian coastline: an information theory approach

Author:
Lotfi Rabaoui; Sabiha Tlig Zouari; Stelios Katsanevakis; Oum Kalthoum Ben Hassine
Source:
Marine biology 2007 v.152 no.3 pp. 537-548
ISSN:
0025-3162
Subject:
Pinna nobilis; allometry; coasts; environmental factors; growth models; logit analysis; mathematical theory; morphometry; Tunisia
Abstract:
... The variability in absolute and relative growth of Pinna nobilis along the Tunisian coastline was investigated. Five populations of P. nobilis were sampled, three from northern and two from eastern Tunisia. The specimens were aged and ten morphometric characters were measured on each individual. To test if differences existed in absolute and relative growth patterns among the different populations ...
DOI:
10.1007/s00227-007-0707-z

14. Compensation among root classes in Phaseolus vulgaris L.

Author:
Gerardo Rubio; Jonathan P. Lynch
Source:
Plant and soil 2007 v.290 no.1-2 pp. 307-321
ISSN:
0032-079X
Subject:
beans; root systems; hypocotyls; allometry; sowing; biomass production; soil; Phaseolus vulgaris; planting; abiotic stress; belowground biomass; culture media; roots; pathogens; phosphorus
Abstract:
... The activity of soil pathogens, competition for assimilates, and the changing availability of below-ground resources make root systems subject to a continuous and dynamic process of formation and loss of both fine and coarse roots. As hypocotyl borne roots appear later than other root classes, they may serve to functionally replace basal and primary roots lost to biotic and abiotic stress. Using c ...
DOI:
10.1007/s11104-006-9163-7

15. Distinctive developmental variability of genital parts in the sexually dimorphic beetle, Prosopocoilus inclinatus (Coleoptera: Lucanidae)

Author:
TATSUTA, HARUKI; FUJIMOTO, KATSUFUMI; MIZOTA, KOJI; REINHARDT, KLAUS; AKIMOTO, SHIN-ICHI
Source:
Biological journal of the Linnean Society 2007 v.90 no.4 pp. 573-581
ISSN:
0024-4066
Subject:
allometry; genitalia; sexual selection
Abstract:
... Recent comparative studies have revealed that the rapid diversity of genitalia is closely related to sexual selection and that genital development interacts with the development of different body parts. Hypotheses about developmental stability due to selection to genital parts were tested by estimating allometric relations in a sexually dimorphic stag beetle Prosopocoilus inclinatus. All genital p ...
DOI:
10.1111/j.1095-8312.2007.00744.x

16. Ecological and evolutionary mechanisms for low seed : ovule ratios: need for a pluralistic approach?

Author:
J. Nathaniel Holland; Scott A. Chamberlain
Source:
Ecology 2007 v.88 no.3 pp. 706-715
ISSN:
0012-9658
Subject:
ovules; moths; flowering; phenotype; selection response; insect pollination; evolution; Pachycereus schottii; allometry; flowers; mutualism; plant ecology; seed productivity; pollen
Abstract:
... Central to the ecology and evolution of a broad range of plants is understanding why they routinely have submaximal reproduction manifested as low seed : ovule and fruit : flower ratios. We know much less about the processes responsible for low seed : ovule ratios than we do for fruit : flower ratios. Current hypotheses for low seed : ovule ratios are largely drawn from those for fruit : flower ra ...
DOI:
10.1890/06-1283
PubMed:
17503598

17. Effects of Wind on the Allometry of Two Species of Plants in an Elfin Cloud Forest

Author:
Cordero, Roberto A.; Fetcher, Ned; Voltzow, Janice
Source:
Biotropica 2007 v.39 no.2 pp. 177-185
ISSN:
0006-3606
Subject:
Arecaceae; Asteraceae; allometry; branches; models; petioles; plant growth; shrubs; tropical montane cloud forests; wind; Puerto Rico
Abstract:
... Thigmomorphogenesis includes the effects of mechanical perturbation on plant growth. To test whether thigmomorphogenesis is evident at different scales within plants, we investigated the effect of wind on allometric relationships between specific plant parts. We chose two species from the elfin cloud forest of Puerto Rico that have contrasting growth habits, the shrub Clibadiun erosum (Asteraceae) ...
DOI:
10.1111/j.1744-7429.2006.00244.x

18. The Energetic Determination, Spatial Dispersion and Density Dependence of Myrmeleon Ant Lion Pits in Las Cruces, Costa Rica

Author:
Swenson, Nathan G.; Luke Mahler, D.; Ferro, Michael; Ritchie, Andrew
Source:
Biotropica 2007 v.39 no.6 pp. 774-777
ISSN:
0006-3606
Subject:
Myrmeleon; allometry; larvae; Costa Rica
Abstract:
... The amount of space used by an organism is energetically determined. We utilized a population of ant lion larvae in Costa Rica to test allometric theories concerning the use of space by organisms and how different densities of individuals affect the use of space. The area of ant lion trapping pits scaled with mass to the three-quarters power, supporting allometric theory for sessile organisms. Our ...
DOI:
10.1111/j.1744-7429.2007.00301.x

19. Estimating Basal Area and Stem Volume for Individual Trees from Lidar Data

Author:
Qi Chen; Peng Gong; Dennis Baldocchi; Yong Q. Tian
Source:
Photogrammetric engineering and remote sensing 2007 v.73 no.12 pp. 1355-1365
ISSN:
0099-1112
Subject:
canopy; lidar; tree crown; allometry; models; trees; woodlands; stand basal area; California
Abstract:
...

This study proposes a new metric called canopy geometric volume G, which is derived from small-footprint lidar data, for estimating individual-tree basal area and stem volume. Based on the plant allometry relationship, we found that basal area B is exponentially related to G (B = β1G3/4, where β1 is a constant) and stem volume V is proportional to G (V = β

DOI:
10.14358/PERS.73.12.1355

20. Evidence for a trade-off between early growth and tooth wear in Svalbard reindeer

Author:
VEIBERG, VEBJØRN; MYSTERUD, ATLE; BJØRKVOLL, EIRIN; LANGVATN, ROLF; LOE, LEIF EGIL; IRVINE, R. JUSTIN; BONENFANT, CHRISTOPHE; COUWELEERS, FRED; STENSETH, NILS CHR.
Source:
Journal of animal ecology 2007 v.76 no.6 pp. 1139-1148
ISSN:
0021-8790
Subject:
allometry; body size; diet; ecosystems; females; forage; foraging; fossils; latitude; mastication; microorganisms; particle size; reindeer; rumen; surface area; teeth; topography; vegetation
Abstract:
... 1. Ruminants depend on efficient physical degradation of forage through chewing to increase the surface area of the food particles presented to the microflora. Fossil evidence suggests that increased molar height is an adaptation for wear tolerance in dry ecosystems with sparse vegetation, but no study has shown selection pressure for hypsodonty in contemporary ruminants. 2. We explored the relati ...
DOI:
10.1111/j.1365-2656.2007.01265.x
PubMed:
17922710

21. Evolution of male dimorphic allometry in a population of the Japanese horned beetle Trypoxylus dichotomus septentrionalis

Author:
Hongo, Yoshihito
Source:
Behavioral ecology and sociobiology 2007 v.62 no.2 pp. 245-253
ISSN:
0340-5443
Subject:
Trypoxylus dichotomus; allometry; body length; evolution; males; morphs; reproductive behavior
Abstract:
... I conducted a detailed morphological analysis of the Japanese horned beetle Trypoxylus dichotomus septentrionalis to clarify the allometric relationship between horn length and body size and examined its mating success and reproductive behaviour in the field. The relationship between horn and body size was not discontinuous at the switch point body size, but the slope of the linear relationship ch ...
DOI:
10.1007/s00265-007-0459-2

22. Evolutionary specialization in mammalian cortical structure

Author:
BARTON, R.A.
Source:
Journal of evolutionary biology 2007 v.20 no.4 pp. 1504-1511
ISSN:
1010-061X
Subject:
allometry; cortex; evolution; eyes; mammals; neocortex; nerve tissue; niches
Abstract:
... Changes in neocortex size were a prominent feature of mammalian brain evolution, but the implications for cortical structure, and consequently for the functional significance of such changes in overall cortical size, are poorly understood. A basic question is whether functionally differentiated cortical areas evolved independently of one another (adaptive specialization) or were allometrically con ...
DOI:
10.1111/j.1420-9101.2007.01330.x
PubMed:
17584243

23. Fibrous Materials as Soft Matter

Author:
Ning Pan; Ji-Huan He; Jianyung Yu
Source:
Textile research journal 2007 v.77 no.4 pp. 205-213
ISSN:
0040-5175
Subject:
allometry; biocompatible materials; entropy; fabrics; friction; geometry; textile fibers
Abstract:
... This paper proposes a new type of soft matter, namely fibrous materials. The common characteristics of soft matter that are shared by fibrous materials, such as the multiphase composition, porous and highly deformable structures, and the non-negligible contributions of entropy to the material behavior are illustrated. More importantly, some unique problems, complex and interesting, yet more or les ...
DOI:
10.1177/0040517507076748

24. Growing and shrinking in the smallest tortoise, Homopus signatus signatus: the importance of rain

Author:
Loehr, Victor J. T.; Hofmeyr, Margaretha D.; Henen, Brian T.
Source:
Oecologia 2007 v.153 no.2 pp. 479-488
ISSN:
0029-8549
Subject:
adults; allometry; bone resorption; climate change; eggs; females; juveniles; life history; males; models; rain; shrinkage; spring; starvation; tortoises
Abstract:
... Climate change models predict that the range of the world's smallest tortoise, Homopus signatus signatus, will aridify and contract in the next decades. To evaluate the effects of annual variation in rainfall on the growth of H. s. signatus, we recorded annual growth rates of wild individuals from spring 2000 to spring 2004. Juveniles grew faster than did adults, and females grew faster than did m ...
DOI:
10.1007/s00442-007-0738-7
PubMed:
17453250

25. Growth allometry of immature insects: larvae do not grow exponentially

Author:
TAMMARU, TOOMAS; ESPERK, TOOMAS
Source:
Functional ecology 2007 v.21 no.6 pp. 1099-1105
ISSN:
0269-8463
Subject:
Lepidoptera; adults; allometry; body size; environmental factors; experimental design; fecundity; insect growth; insect larvae; insects; instars; life history; models
Abstract:
... 1. The allometric relationship between growth rate and body mass has received considerable attention but different taxa have not been equally studied. In particular, a limited amount of information is available on growth allometry of insect larvae. 2. In life-history studies, it is often assumed that insect larvae grow exponentially. This leads one to expect that potential rewards of extending gro ...
DOI:
10.1111/j.1365-2435.2007.01319.x

26. Growth and yield modelling of Acacia mangium in Colombia

Author:
Torres Vélez, Danny Alexander; Del Valle, Jorge Ignacio
Source:
New forests 2007 v.34 no.3 pp. 293-305
ISSN:
0169-4286
Subject:
plantations; Acacia mangium; site index; allometry; cattle; equations; soil degradation; soil amendments; tree and stand measurements; trees; carbon; growth models; timber production; mining; biomass; stand basal area; roots; mortality; Colombia; Caribbean
Abstract:
... To study the growth and yield of Acacia mangium in the Caribbean region of Colombia, allometric equations of total volume and aboveground plus coarse roots biomass were fitted as a function of the tree's diameter at breast height (dbh). The von Bertalanffy's growth model and 59, 0.1 ha plots (0.55-9.55 years old) were used to develop site index (SI) curves at 6 years base age. Then, using the stat ...
DOI:
10.1007/s11056-007-9056-5

27. Head morphological variation in Podarcis muralis and Podarcis sicula: a landmark-based approach

Author:
Emiliano Bruner; David Costantini
Source:
Amphibia-reptilia v.28 no.4 pp. 566-573
ISSN:
0173-5373
Subject:
Podarcis muralis; allometry; biomechanics; diet; evolution; geometry; head; morphogenesis; morphometry
Abstract:
... The geometry of the cephalic scales in lizards is easily represented by using landmark based approaches. The cephalic scales may prove useful structures in the investigation of the evolution and morphogenesis of lizards because of their biomechanical relationships with the underlying bones and muscular anatomy. In the present paper the head morphology in Podarcis muralis and Podarcis sicula is com ...
DOI:
10.1163/156853807782152525

28. Indirect estimation of benthic secondary production in the Lagoon of Venice (Italy)

Author:
Tagliapietra, D.; Cornello, M.; Pessa, G.
Source:
Hydrobiologia 2007 v.588 no.1 pp. 205-212
ISSN:
0018-8158
Subject:
allometry; benthic organisms; biomass; data collection; equations; littoral zone; regression analysis; seagrasses; secondary productivity; temperature; Italy
Abstract:
... Five published indirect methods to estimate benthic secondary production of intertidal mudflats and a new proposed formulation based on quarter-power allometric scaling and the “Universal Temperature Dependence” of biological processes (UTD) were compared. For this purpose, a dataset consisting of an annual series of samples, taken from the Lagoon of Venice from March 1996 to March 1997, at sites ...
DOI:
10.1007/s10750-007-0663-0

29. Influence of MHS genotype and feeding regime on allometric and temporal growth of pigs assessed by magnetic resonance imaging

Author:
Kusec, G.; Baulain, U.; Kallweit, E.; Glodek, P.
Source:
Livestock science 2007 v.110 no.1-2 pp. 89-100
ISSN:
1878-0490
Subject:
genotype; malignant hyperthermia; feeding level; allometry; animal growth; swine; magnetic resonance imaging; body weight; liveweight gain; muscles
DOI:
10.1016/j.livsci.2006.10.007

30. Models of ontogenetic allometry in cladoceran morphology studies

Author:
Lagergren, Ragnar; Svensson, Jan-Erik; Stenson, Jan A. E.
Source:
Hydrobiologia 2007 v.594 no.1 pp. 109-116
ISSN:
0018-8158
Subject:
Daphnia; allometry; models; ontogeny; predation; predators
Abstract:
... Ontogenetic variation of morphological traits in cladocerans is usually analysed by a simple allometry function. We found that common cyclomorphic and inducible traits in Bosmina and Daphnia sometimes deviate from simple allometry, however. Consequently, simple allometric analysis may at times be inadequate since important aspects of the ontogenetic development may not be revealed. We suggest that ...
DOI:
10.1007/s10750-007-9085-2

31. No evidence for condition-dependent expression of male genitalia in the dung beetle Onthophagus taurus

Author:
HOUSE, C.M.; SIMMONS, L.W.
Source:
Journal of evolutionary biology 2007 v.20 no.4 pp. 1322-1332
ISSN:
1010-061X
Subject:
Onthophagus taurus; allometry; dung beetles; evolution; feces; genes; horns; larvae; larval development; male genitalia; nutrition; phenotypic variation
Abstract:
... We examine the condition-dependence of male genitalia in the dung beetle Onthophagus taurus by manipulating the quality of dung provided for larval growth and development. We show that the influence of larval nutrition differed considerably across three different trait classes (sexual, nonsexual and genital). The size of all nonsexual traits varied with dung quality but their allometric slopes rem ...
DOI:
10.1111/j.1420-9101.2007.01346.x
PubMed:
17584227

32. Ontogeny of feeding behavior and cranial morphology in the whitespotted bambooshark Chiloscyllium plagiosum

Author:
Dayv Lowry; Philip J. Motta
Source:
Marine biology 2007 v.151 no.6 pp. 2013-2023
ISSN:
0025-3162
Subject:
Chiloscyllium plagiosum; allometry; behavior change; feeding behavior; head; ontogeny; shrimp
Abstract:
... Morphological and behavioral development of the feeding apparatus over early ontogeny can profoundly affect the ability of an organism to obtain nourishment, ultimately impacting survival. The interplay between morphology and behavior over the first year of life was studied in the whitespotted bambooshark Chiloscyllium plagiosum (Bennett 1830) beginning in March of 2002 using high-speed videograph ...
DOI:
10.1007/s00227-007-0642-z

33. Organ Partitioning and Distribution across the Seed Plants: Assessing the Relative Importance of Phylogeny and Function

Author:
McCarthy, M.C.; Enquist, B.J.; Kerkhoff, A.J.
Source:
International journal of plant sciences 2007 v.168 no.5 pp. 751-761
ISSN:
1058-5893
Subject:
allometry; phylogeny; plant physiology; biomass
DOI:
10.1086/513491

34. Oxygen consumption of the semi-terrestrial crab Pachygrapsus marmoratus in relation to body mass and temperature: an information theory approach

Author:
Stelios Katsanevakis; John Xanthopoulos; Nikos Protopapas; George Verriopoulos
Source:
Marine biology 2007 v.151 no.1 pp. 343-352
ISSN:
0025-3162
Subject:
activation energy; allometry; aquatic invertebrates; confidence interval; crabs; heat tolerance; littoral zone; mathematical theory; models; oxygen consumption; temperature; uncertainty; Black Sea; Mediterranean Sea
Abstract:
... Pachygrapsus marmoratus is a semi-terrestrial crab and the most common grapsid crab in the intertidal belt of rocky shores throughout the Mediterranean Sea, Black Sea and northeastern Atlantic. In this study, the combined effects of temperature (T), body mass (M), and sex (S) on the routine oxygen consumption rate (R) in P. marmoratus were quantified. The blotted wet body mass of the specimens ran ...
DOI:
10.1007/s00227-006-0485-z

35. Photosynthetic efficiency as a function of thermal stratification and phytoplankton size structure in an oligotrophic alpine lake

Author:
Kaiblinger, Christina; Greisberger, Sonja; Teubner, Katrin; Dokulil, Martin T.
Source:
Hydrobiologia 2007 v.578 no.1 pp. 29-36
ISSN:
0018-8158
Subject:
Planktothrix rubescens; absorption; allometry; chlorophyll; data collection; environmental factors; fluorometry; lakes; light intensity; mixing; photosystem II; phytoplankton; summer; temperature profiles; winter; Austria
Abstract:
... Allometric relationships of phytoplankton communities were studied on the basis of a five-year data-set in a deep oligotrophic alpine lake in Austria. The seasonal phytoplankton succession in Mondsee is characterised by diatoms during winter mixing and a distinct metalimnetic population of Planktothrix rubescens during stratification in summer. The variation of phytoplankton photosynthetic efficie ...
DOI:
10.1007/s10750-006-0430-7

36. Pineal Gland Post-natal Growth in Rat Revisited

Author:
Ferreira-Medeiros, M.; Mandarim-de-Lacerda, C.A.; Correa-G.illieron, E.M.
Source:
Anatomia, histologia, embryologia 2007 v.36 no.4 pp. 284-289
ISSN:
0340-2096
Subject:
allometry; brain; cell nucleus; lactation; light microscopy; pineal body; quantitative analysis; rats; weaning
Abstract:
... We studied the pineal gland (PG) growth separating two critical moments of the rat post-natal development: the lactation and post-weaning periods. We studied 30 Wistar rats in the post-natal day - PN day 6, 10, 21, 45, 60 and 90 using light microscopy and quantitative methods (allometry and stereology). We estimated the PG volume (using the Cavalieri's principle) and the number of pineal gland cel ...
DOI:
10.1111/j.1439-0264.2007.00763.x
PubMed:
17617106

37. Plasticity and ontogenetic drift of biomass allocation in response to above- and below-ground resource availabilities in perennial herbs: a case study of Alternanthera philoxeroides

Author:
Geng, Yu-Peng; Pan, Xiao-Yun; Xu, Cheng-Yuan; Zhang, Wen-Ju; Li, Bo; Chen, Jia-Kuan
Source:
Ecological research 2007 v.22 no.2 pp. 255-260
ISSN:
0912-3814
Subject:
Alternanthera philoxeroides; allometry; biomass; case studies; dry matter partitioning; herbs; models; nutrient availability; ontogeny; perennial weeds; prediction
Abstract:
... Changes in plant biomass allocation in response to varying resource availabilities may result from ontogenetic drift caused by allometric growth (i.e., apparent plasticity), a true adjustment of ontogenetic trajectories (true plasticity) or both (complex plasticity). Given that the root allocation of annual species usually decreases during the growth, the developmentally explicit model predicts th ...
DOI:
10.1007/s11284-006-0017-9

38. Plasticity in metabolic allometry: the role of dietary stoichiometry

Author:
Jeyasingh, Punidan D.
Source:
Ecology letters 2007 v.10 no.4 pp. 282-289
ISSN:
1461-023X
Subject:
Daphnia; allometry; body size; carbon; diet; energy; ingestion; metabolism; phosphorus; stoichiometry
Abstract:
... Metabolism involves multiple elements. While we know much about the allometry in metabolic response of organisms to energy (carbon, C) availability, little is known about how different-sized organisms respond to the relative availability of elements. I experimentally manipulated availability of phosphorus (P) relative to C, to test whether dietary C : P affects metabolism in four species of Daphni ...
DOI:
10.1111/j.1461-0248.2007.01023.x
PubMed:
17355567

39. Plasticity to neighbour shade: fitness consequences and allometry

Author:
BELL, D.L.; GALLOWAY, L.F.
Source:
Functional ecology 2007 v.21 no.6 pp. 1146-1153
ISSN:
0269-8463
Subject:
Geranium carolinianum; allometry; annuals; evolutionary adaptation; petioles; phenotypic plasticity; planting; wood
Abstract:
... 1. Phenotypic plasticity may confer a fitness benefit to organisms in a spatially heterogeneous environment. However, the evolution of such adaptive plasticity can be limited by the constraints imposed by interacting environments. Moreover, adaptive plasticity may be masked by reduced growth in a low-quality environment. The allometry between plasticity of morphological traits and overall growth i ...
DOI:
10.1111/j.1365-2435.2007.01327.x

40. Recent changes in allometric relationships among morphological traits in the dipper (Cinclus cinclus)

Author:
Gregorio Moreno-Rueda; José M. Rivas
Source:
Journal of ornithology 2007 v.148 no.4 pp. 489-494
ISSN:
2193-7192
Subject:
allometry; birds; body size; diet; global warming; mountains; rivers; tail; water flow; Spain
Abstract:
... Organisms are responding to recent climate warming by changing different aspects of their biology, including morphology. The present work examines the way in which dipper (Cinclus cinclus) morphology has varied over the past 20 years (1985–2005) in Sierra Nevada (south-eastern Spain). Tarsus length has decreased, but wing and tail length have increased in the same period. These opposite trends hav ...
DOI:
10.1007/s10336-007-0184-7

41. Regional mixed-effects height–diameter models for loblolly pine (Pinus taeda L.) plantations

Author:
Guillermo Trincado; Curtis L. VanderSchaaf; Harold E. Burkhart
Source:
European journal of forest research 2007 v.126 no.2 pp. 253-262
ISSN:
1612-4669
Subject:
Pinus taeda; allometry; coastal plains; cooperative research; equations; models; piedmont; plantations; stand density; trees; Virginia
Abstract:
... A height–diameter mixed-effects model was developed for loblolly pine (Pinus taeda L.) plantations in the southeastern US. Data were obtained from a region-wide thinning study established by the Loblolly Pine Growth and Yield Research Cooperative at Virginia Tech. The height–diameter model was based on an allometric function, which was linearized to include both fixed- and random-effects parameter ...
DOI:
10.1007/s10342-006-0141-7

42. Regional scale variation in forest structure and biomass in the Yucatan Peninsula, Mexico: Effects of forest disturbance

Author:
Urquiza-Haas, T.; Dolman, P.M.; Peres, C.A.
Source:
Forest ecology and management 2007 v.247 no.1-3 pp. 80-90
ISSN:
0378-1127
Subject:
soil properties; carbon sequestration; anthropogenic activities; specific gravity; density; land use; estimation; dry matter accumulation; forest stands; vegetation structure; equations; tropical forests; fires; spatial data; clearcutting; logging; forest succession; old-growth forests; wood; allometry; geographical variation; edaphic factors; stand basal area; Mexico
DOI:
10.1016/j.foreco.2007.04.015

43. Response of Douglas-fir leaf area index and litterfall dynamics to Swiss needle cast in north coastal Oregon, USA

Author:
Aaron R. Weiskittel; Douglas A. Maguire
Source:
Annals of forest science 2007 v.64 no.2 pp. 121-132
ISSN:
1286-4560
Subject:
Pseudotsuga menziesii var. menziesii; Swiss needle cast; allometry; defoliation; forest growth; growing season; insects; landforms; leaf area index; leaves; monitoring; pathogens; spring; stand structure; trees; Oregon
Abstract:
... Sources of variation in leaf area index (LAI; m²of projected leaf area per m²of ground area) and its seasonal dynamics are not well known in managed Douglas-fir stands, despite the importance of leaf area in forecasting forest growth, particularly in stands impacted by insects or disease. The influence of Swiss needle cast (SNC) on coastal Douglas-fir (Pseudotsuga menziesii var. menziesii [Mirb] F ...
DOI:
10.1051/forest:2006096

44. Response of branch growth and mortality to silvicultural treatments in coastal Douglas-fir plantations: Implications for predicting tree growth

Author:
Weiskittel, A.R.; Maguire, D.A.; Monserud, R.A.
Source:
Forest ecology and management 2007 v.251 no.3 pp. 182-194
ISSN:
0378-1127
Subject:
tree growth; branches; death; tree crown; forest plantations; coniferous forests; conifers; Pseudotsuga menziesii; prediction; forest thinning; fertilizer application; weed control; Phaeocryptopus; foliar diseases; fungal diseases of plants; allometry; simulation models; growth models; statistical analysis; tree and stand measurements; Oregon
DOI:
10.1016/j.foreco.2007.06.007

45. Responses of rice and winter wheat to free-air CO2 enrichment (China FACE) at rice/wheat rotation system

Author:
Hongliang Ma; Jianguo Zhu; Zubin Xie; Gang Liu; Qing Zeng; Yong Han
Source:
Plant and soil 2007 v.294 no.1-2 pp. 137-146
ISSN:
0032-079X
Subject:
Oryza sativa; Triticum aestivum; aboveground biomass; allometry; belowground biomass; carbon; carbon dioxide; carbon nitrogen ratio; developmental stages; energy crops; experimental design; fertilizer rates; free air carbon dioxide enrichment; growing season; leaves; nitrogen content; nitrogen fertilizers; phosphorus; rice; roots; stems; tillering; winter wheat; China
Abstract:
... Free-air CO₂ enrichment (FACE) system at a Chinese rice-wheat rotation field was constructed to investigate responses of rice and wheat crop growth to elevated CO₂ and nitrogen fertilization. A factorial experiment design was set up with two levels of atmospheric CO₂ concentration (350 and 550 μmol mol-¹) and N application rates (LN: 150 kg N ha-¹ for rice and 125 kg N ha-¹ for wheat; HN: 250 kg N ...
DOI:
10.1007/s11104-007-9241-5

46. Root biomass and distribution of a Picea—Abies stand and a Larix—Betula stand in pumiceous Entisols in Japan

Author:
Yoshimi Sakai; Masamichi Takahashi; Nagaharu Tanaka
Source:
Journal of forest research 2007 v.12 no.2 pp. 120-125
ISSN:
1610-7403
Subject:
A horizons; Abies sachalinensis; Entisols; Larix kaempferi; Picea abies; Picea glehnii; allometry; belowground biomass; fine roots; gravel; nutrient availability; nutrients; pumice; root growth; root systems; rooting; temperate forests; tree and stand measurements; trees; water; Japan
Abstract:
... Root biomass and root distribution were studied in Entisols derived from the thick deposition of volcanic pumice on Hokkaido Island, Japan, to examine the effect of soil conditions on tree root development. The soil had a thin (<10 cm) A horizon and thick coarse pumiceous gravel layers with low levels of available nutrients and water. Two stands were studied: a Picea glehnii–Abies sachalinensis st ...
DOI:
10.1007/s10310-006-0270-3

47. Root development across a chronosequence in a Japanese cedar (Cryptomeria japonica D. Don) plantation

Author:
Reiji Fujimaki; Ryunosuke Tateno; Naoko Tokuchi
Source:
Journal of forest research 2007 v.12 no.2 pp. 96-102
ISSN:
1610-7403
Subject:
Cryptomeria japonica; allometry; biomass; branching; canopy; chronosequences; fine roots; nutrients; plantations; soil depth; Japan
Abstract:
... We investigated the biomass, vertical distribution, and specific root length (SRL) of fine and small roots in a chronosequence of Japanese cedar (Cryptomeria japonica D. Don) plantations in Nara Prefecture, central Japan. Roots were collected from soil blocks up to 50 cm in depth in five plantations of differing age: 4, 15, 30, 41, and 88 years old. Fine-root biomass reached a maximum (639 gm⁻²) i ...
DOI:
10.1007/s10310-006-0256-1

48. Seasonal size distribution, condition status and muscle yield of Mediterranean horse mackerel Trachurus mediterraneus from the North Aegean Sea, Greece

Author:
TZIKAS, Zissis; AMBROSIADIS, Ioannis; SOULTOS, Nikolaos; GEORGAKIS, Spyridon
Source:
Fisheries science 2007 v.73 no.2 pp. 453-462
ISSN:
0919-9268
Subject:
Trachurus; allometry; autumn; fisheries; mackerel; muscles; seasonal variation; spring; Aegean Sea; Greece; Mediterranean Sea
Abstract:
... The seasonal intrinsic variability of the North Aegean Sea Mediterranean horse mackerel Trachurus mediterraneus population has been studied from monthly samples taken from the Greek purse-seine fishery over a 4-year period (2001-2005). The length and weight frequency distributions differed significantly by season, the highest mean lengths and weights attained in spring and the lowest in autumn. Le ...
DOI:
10.1111/j.1444-2906.2007.01354.x

49. Sexual Selection on Accessory Glands, Genitalia and Protarsal Pads in the Whirligig Beetle Dineutus nigrior Roberts (Coleoptera: Gyrinidae)

Author:
Fairn, Evan R.; Schulte-Hostedde, Albrecht I.; Alarie, Yves
Source:
Ethology 2007 v.113 no.3 pp. 257-266
ISSN:
1439-0310
Subject:
Dineutus; aedeagus; allometry; females; males; mating behavior; probability; sexual selection
Abstract:
... Sexual selection is a potent force in the evolution of morphology in sexually reproducing species. When large size in a trait is favored by sexual selection the trait often exhibits positive allometry. Mating behavior in whirligig beetles consists of males attempting to grasp reluctant females using enlarged protarsi (protarsal pads). Here we use allometry and a mating experiment to investigate se ...
DOI:
10.1111/j.1439-0310.2006.01315.x

50. Size matters: genital allometry in an African mole-rat (Family: Bathyergidae)

Author:
Kinahan, A. A.; Bennett, N. C.; O'Riain, M. J.; Hart, L.; Bateman, P. W.
Source:
Evolutionary ecology 2007 v.21 no.2 pp. 201-213
ISSN:
0269-7653
Subject:
Bathyergus suillus; allometry; coevolution; female genitalia; females; insects; male genitalia; males; mole rats; sexual selection; sperm competition
Abstract:
... Typically, sexually selected traits show positive allometry and high coefficients of variation (CV). To date, many studies on the allometry of genitalia have focused on insects. In addition, studies have largely ignored the potential for sexual selection on female genitalia, despite male and female structures presumably co-evolving. Insects tend to show negative allometry in both male and female g ...
DOI:
10.1007/s10682-006-0022-z

51. Spawning pattern and type of fecundity in relation to ovarian allometry in the round herring Etrumeus teres

Author:
Guido Plaza; Hideo Sakaji; Hitoshi Honda; Yuichi Hirota; Kazuya Nashida
Source:
Marine biology 2007 v.152 no.5 pp. 1051-1064
ISSN:
0025-3162
Subject:
Etrumeus; allometry; autumn; correlation; developmental stages; eggs; fecundity; females; herring; liver; oocytes; oogonia; ovarian development; seasonal variation; spawning; spring; summer; vitellogenesis; winter; Japan
Abstract:
... Spawning pattern (assessed by seasonal changes in ovarian developmental stages) and type of fecundity (assessed by analysis of oocyte-size frequency distributions) of the round herring Etrumeus teres were studied in relation to ovarian growth and seasonal changes in the gonadosomatic (GSI), hepatosomatic (HSI) and liposomatic (LSI) index as well as the somatic condition of spawners (CS) in a spawn ...
DOI:
10.1007/s00227-007-0756-3

52. Stem/branch maintenance respiration of Japanese red pine stand

Author:
Kim, M.H.; Nakane, K.; Lee, J.T.; Bang, H.S.; Na, Y.E.
Source:
Forest ecology and management 2007 v.243 no.2-3 pp. 283-290
ISSN:
0378-1127
Subject:
temperature; mathematical models; diameter; allometry; equations; cell respiration; trees; latitude; Pinus densiflora; branches; Japan
DOI:
10.1016/j.foreco.2007.03.017

53. Validation and refinement of allometric equations for roots of northern hardwoods

Author:
Vadeboncoeur, M.A.; Hamburg, S.P.; Yanai, R.D.
Source:
Canadian journal of forest research = 2007 v.37 no.9 pp. 1777-1783
ISSN:
0045-5067
Subject:
roots; root growth; allometry; forest trees; hardwood; Acer saccharum; Fagus grandifolia; Betula alleghaniensis; equations; mathematical models; estimation; accuracy; New Hampshire
Abstract:
... The allometric equations developed by Whittaker et al. (1974. Ecol. Monogr. 44: 233-252) at the Hubbard Brook Experimental Forest have been used to estimate biomass and productivity in northern hardwood forest systems for over three decades. Few other species-specific allometric estimates of belowground biomass are available because of the difficulty in collecting the data, and such equations are ...
DOI:
10.1139/X07-032

54. Winged queens replaced by reproductives smaller than workers in Mystrium ants

Author:
Molet, Mathieu; Peeters, Christian; Fisher, Brian L.
Source:
Naturwissenschaften 2007 v.94 no.4 pp. 280-287
ISSN:
0028-1042
Subject:
Chilopoda; Formicidae; adults; allometry; brood rearing; females; morphometry; reproduction; reproductives; spermatheca; thorax; Madagascar
Abstract:
... In ants, winged queens that are specialized for independent colony foundation can be replaced by wingless reproductives better adapted for colony fission. We studied this shift in reproductive strategy by comparing two Mystrium species from Madagascar using morphometry, allometry and dissections. Mystrium rogeri has a single dealate queen in each colony with a larger thorax than workers and simila ...
DOI:
10.1007/s00114-006-0190-2
PubMed:
17165079

55. The allometry of echolocation call frequencies of insectivorous bats: why do some species deviate from the pattern

Author:
Jacobs, David S.; Barclay, Robert M. R.; Walker, Maryalice H.
Source:
Oecologia 2007 v.152 no.3 pp. 583-594
ISSN:
0029-8549
Subject:
Myotis; Rhinolophus; allometry; bioacoustics; body size; foraging; habitats; insectivores; insects; prediction
Abstract:
... The peak echolocation frequency of insectivorous bats generally declines as body size increases. However, there are notable exceptions to this rule, with some species, such as Rhinolophus clivosus, having a higher than expected peak frequency for their body size. Such deviations from allometry may be associated with partitioning of foraging habitat (the foraging habitat hypothesis) or insect prey ...
DOI:
10.1007/s00442-007-0679-1
PubMed:
17345101

56. The effect of brackish water irrigation on the above- and below-ground development of pollarded Acacia saligna shrubs in an arid environment

Author:
Eggleton, Marisol; Zegada-Lizarazu, Walter; Ephrath, Jhonathan; Berliner, Pedro
Source:
Plant and soil 2007 v.299 no.1-2 pp. 141-152
ISSN:
0032-079X
Subject:
Acacia saligna; aboveground biomass; allometry; belowground biomass; biomass production; brackish water; branches; dry environmental conditions; equations; field experimentation; forage; freshwater; fuelwood; groundwater; irrigation scheduling; irrigation water; leaf water potential; leaves; microirrigation; pollarding; regrowth; root growth; roots; runoff; shoots; shrubs; water quality; water resources
Abstract:
... The regrowth capacity after pollarding of a short-rotation plantation of Acacia saligna (Labill.) H. Wendl. was investigated in a field trial. This shrub has been proposed as a provider of biomass (fuelwood and fodder) in an arid environment, using local marginal water resources such as surface runoff and brackish groundwater. The specific objective of this study was to examine the effects of wate ...
DOI:
10.1007/s11104-007-9371-9

57. A linear mixed-effects model of biomass and volume of trees using Landsat ETM+ images

Author:
Meng, Q.; Cieszewski, C.J.; Madden, M.; Borders, B.
Source:
Forest ecology and management 2007 v.244 no.1-3 pp. 93-101
ISSN:
0378-1127
Subject:
linear models; forest growth; growth models; spatial data; image analysis; remote sensing; allometry; forest trees; geographical variation; geographic information systems; Landsat; temperate forests; Georgia
DOI:
10.1016/j.foreco.2007.03.056

58. A mechanistic, stochastic, population model of egg production

Author:
Johnson, S.A.; Gous, R.M.
Source:
British poultry science 2007 v.48 no.2 pp. 224-232
ISSN:
0007-1668
Subject:
laying hens; egg production; age at first egg; mathematical models; stochastic processes; ovulation; oviposition; egg yolk; ovalbumin; egg shell; egg weight; allometry
DOI:
10.1080/00071660701227493
PubMed:
17453816

59. A method to reconstruct anguilliform fishes from partially digested items

Author:
François Brischoux; Xavier Bonnet; Margot De Crignis
Source:
Marine biology 2007 v.151 no.5 pp. 1893-1897
ISSN:
0025-3162
Subject:
allometry; equations; feces; fish; predators; stomach; New Caledonia
Abstract:
... Estimating the amounts of resources consumed by individuals is important in many studies. For predators, allometric relationships can be used to extrapolate the size of preys from undigested remains found in the stomach and in the faeces. However, such equations are available for a limited number of species. Based on a large sample size gathered in New Caledonia on both predators (sea kraits) and ...
DOI:
10.1007/s00227-007-0626-z

60. 3‐d growth patterns of trees: effects of carbon economy, meristem activity, and selection

Author:
Frank J. Sterck; Feike Schieving
Source:
Ecological monographs 2007 v.77 no.3 pp. 405-420
ISSN:
0012-9615
Subject:
tree growth; spatial data; plant architecture; forest trees; growth models; leaves; carbon; dry matter partitioning; light; meristems; natural selection; tree crown; allometry
Abstract:
... A functional–structural plant growth model was used to explore how selection might influence the ontogenetic patterns in three‐dimensional (3‐D) growth of trees. The 3‐D plant structure is defined by the orientation of metamers. The dynamics in the 3‐D plant structure depend on the production of metamers and/or leaf pipes and the loss of such plant components. In the simulations, metamer and leaf‐ ...
DOI:
10.1890/06-1670.1

61. Allometric allocation in fruit and seed packaging conditions the conflict among selective pressures on seed size

Author:
Martínez, Isabel; García, Daniel; Obeso, José Ramón
Source:
Evolutionary ecology 2007 v.21 no.4 pp. 517-533
ISSN:
0269-7653
Subject:
Crataegus monogyna; allometry; birds; correlation; evolution; fruits; packaging; probability; pulp; rodents; seed dispersal; seed predation; seeds; trees
Abstract:
... Selective pressures on seed size could vary among the different stages of plant life cycles, so no simple relation could explain a priori its evolution. Here, we determined the relationships between seed size and two fitness components--seed dispersal and survival from predation--in a bird-dispersed tree, Crataegus monogyna. We interpret these relationships in relation to the patterns of mass allo ...
DOI:
10.1007/s10682-006-9132-x

62. Allometric scaling, metabolic body size and interspecies comparisons of basal nutritional requirements

Author:
Rucker, R.B.
Source:
Journal of animal physiology and animal nutrition 2007 v.91 no.3-4 pp. 148-156
ISSN:
0931-2439
Subject:
allometry; animals; body size; energy; nutrient requirements; prediction
Abstract:
... The amounts of specific substances needed per day that are generally thought to be nutritionally essential or conditionally important are similar among animal species when expressed per unit of energy consumed or per metabolic body size. Accordingly, a case is made that in addition to basal daily energy utilization, allometric scaling based on metabolic body size (3/4 power of mass or weight in kg ...
DOI:
10.1111/j.1439-0396.2007.00681.x

63. Bayesian change‐point analyses in ecology

Author:
Brian Beckage; Lawrence Joseph; Patrick Belisle; David B. Wolfson; William J. Platt
Source:
new phytologist 2007 v.174 no.2 pp. 456-467
ISSN:
0028-646X
Subject:
allometry; arid lands; autocorrelation; canopy gaps; climate change; desertification; developmental stages; overgrazing; space and time; species recruitment; statistical models; tree and stand measurements; trees; uncertainty; understory; vegetation
Abstract:
... • Ecological and biological processes can change from one state to another once a threshold has been crossed in space or time. Threshold responses to incremental changes in underlying variables can characterize diverse processes from climate change to the desertification of arid lands from overgrazing. • Simultaneously estimating the location of thresholds and associated ecological parameters can ...
DOI:
10.1111/j.1469-8137.2007.01991.x
PubMed:
17388908

64. Biomass expansion factors for Sitka spruce (Picea sitchensis (Bong.) Carr.) in Ireland

Author:
Brian Tobin; Maarten Nieuwenhuis
Source:
European journal of forest research 2007 v.126 no.2 pp. 189-196
ISSN:
1612-4669
Subject:
Picea sitchensis; allometry; biomass; carbon; carbon sinks; dry matter partitioning; forest stands; forest trees; forests; inventories; Ireland
Abstract:
... The assessment of a forest resource in national inventories provides a firm basis for the calculation of biomass and carbon (C) stocks of forests. Biomass expansion factors (BEFs) and conversion factors provide a robust and simple method of converting from forest tree stem volume to total forest biomass. These factors should be constructed on the basis of nationally specific data in order to take ...
DOI:
10.1007/s10342-005-0105-3

65. Calibration of LAI-2000 to estimate leaf area index (LAI) and assessment of its relationship with stand productivity in six native and introduced tree species in Costa Rica

Author:
Arias, D.; Calvo-Alvarado, J.; Dohrenbusch, A.
Source:
Forest ecology and management 2007 v.247 no.1-3 pp. 185-193
ISSN:
0378-1127
Subject:
primary productivity; leaf area index; model validation; vegetation cover; forest growth; Picea; measurement; calibration; tree and stand measurements; forest stands; Gmelina arborea; simulation models; Vochysia guatemalensis; forest trees; forest yields; tropical forests; equations; Hieronyma alchorneoides; Terminalia amazonia; Vochysia ferruginea; canopy; allometry; overstory; Costa Rica
DOI:
10.1016/j.foreco.2007.04.039

66. Carica papaya (Caricaceae): a case study into the effects of domestication on plant vegetative growth and reproduction

Author:
Niklas, Karl J.; Marler, Thomas E.
Source:
American journal of botany 2007 v.94 no.6 pp. 999-1002
ISSN:
0002-9122
Subject:
Carica papaya; allometry; asexual reproduction; case studies; cultivars; domestication; flowering; gender; plant cultural practices; plant reproduction; sexual maturity; stems; vegetative growth; wild plants; Guam
Abstract:
... Few studies have quantitatively evaluated the gender specific effects of cultivation on plant growth and reproduction. The availability of cultivated and wild populations of different genders of Carica papaya L. (Caricaceae) on Guam provided an opportunity to study these effects quantitatively. We compared the gender specific allometry of height vs. basal stem diameter (H vs. D), stem slenderness ...
DOI:
10.3732/ajb.94.6.999
PubMed:
21636469

67. Comparative evaluation of five height-diameter models developed for black spruce and jack pine stand-types in terms of goodness-of-fit, lack-of-fit and predictive ability

Author:
Newton, P.F.; Amponsah, I.G.
Source:
Forest ecology and management 2007 v.247 no.1-3 pp. 149-166
ISSN:
0378-1127
Subject:
decision support systems; forest trees; boreal forests; equations; Picea mariana; allometry; forest yields; coniferous forests; tree and stand measurements; forest stands; stand density; Pinus banksiana; stand management; nonlinear models; measurement
DOI:
10.1016/j.foreco.2007.04.029

68. Differential cell size optimization strategies produce distinct diatom richness-body size relationships in stream benthos and plankton

Author:
PASSY, SOPHIA I.
Source:
Journal of ecology 2007 v.95 no.4 pp. 745-754
ISSN:
0022-0477
Subject:
allometry; animal ecology; autotrophs; benthic organisms; body size; habitats; interspecific competition; nutrient uptake; phytoplankton; species diversity; streams
Abstract:
... 1 The relationship between species richness and body size is one of the most thoroughly studied subjects in animal ecology; however, this relationship and its underlying mechanisms are largely unknown in photosynthetic organisms, especially protists. 2 In this continental study, I first examined the number of diatom species across the cell size spectrum in benthic and planktonic stream habitats. T ...
DOI:
10.1111/j.1365-2745.2007.01248.x

69. Differential effects of water depth and sediment type on clonal growth of the submersed macrophyte Vallisneria natans

Author:
Keyan Xiao; Dan Yu; Zhonghua Wu
Source:
Hydrobiologia 2007 v.589 no.1 pp. 265-272
ISSN:
0018-8158
Subject:
Vallisneria; allometry; biomass production; clay; dry matter partitioning; macrophytes; sand
Abstract:
... The response of clonal growth and ramet morphology to water depth (from 60 to 260 cm) and sediment type (sand versus organic clay) was investigated for the stoloniferous submersed macrophyte Vallisneria natans in an outdoor pond experiment. Results showed that water depth significantly affected clonal growth of V. natans in terms of clone weight, number of ramets, number of generations, clonal rad ...
DOI:
10.1007/s10750-007-0740-4

70. Distribution of aboveground live biomass in the Amazon basin

Author:
SAATCHI, S.S.; HOUGHTON, R.A.; DOS SANTOS ALVALÁ, R.C.; SOARES, J.V.; YU, Y.
Source:
Global change biology 2007 v.13 no.4 pp. 816-837
ISSN:
1354-1013
Subject:
allometry; basins; belowground biomass; carbon; deciduous forests; decision support systems; dry season; environmental factors; equations; floodplains; forest inventory; land cover; land use change; logging; mountains; old-growth forests; remote sensing; savannas; secondary forests; tropical forests; uncertainty; Amazonia; Andes region; Colombia; Ecuador; Peru
Abstract:
... The amount and spatial distribution of forest biomass in the Amazon basin is a major source of uncertainty in estimating the flux of carbon released from land-cover and land-use change. Direct measurements of aboveground live biomass (AGLB) are limited to small areas of forest inventory plots and site-specific allometric equations that cannot be readily generalized for the entire basin. Furthermor ...
DOI:
10.1111/j.1365-2486.2007.01323.x

71. Effect of tree, stand, and site variables on the allometry of Eucalyptus globulus tree biomass

Author:
Nuno António; Margarida Tomé; José Tomé; Paula Soares; Luís Fontes
Source:
Canadian journal of forest research = 2007 v.37 no.5 pp. 895-906
ISSN:
0045-5067
Subject:
tree growth; forest trees; tree crown; Eucalyptus globulus; allometry; equations; dry matter accumulation; height; tree and stand measurements; stand density; regression analysis; growth models; forest inventory; length; nonlinear models; climatic zones; climatic factors; prediction; Portugal
Abstract:
... The objective of this study was to develop a system of compatible equations to estimate eucalyptus (Eucalyptus globulus Labill.) tree aboveground biomass and biomass of tree components for forest biomass prediction across regional boundaries. Data came from 441 trees sampled on several sites (99 and 14 plots in planted and coppice regenerated stands, respectively) representative of the eucalyptus ...
DOI:
10.1139/X06-276

72. Effective height development of four co-occurring species in the gap-phase regeneration of Douglas fir monocultures under nature-oriented conversion

Author:
Dekker, M.; Breugel, M. van; Sterck, F.J.
Source:
Forest ecology and management 2007 v.238 no.1-3 pp. 189-198
ISSN:
0378-1127
Subject:
competitive exclusion; forest trees; shade tolerance; allometry; natural regeneration; tree and stand measurements; dry matter accumulation; forest stands; Larix kaempferi; Betula pendula; canopy gaps; Pinus sylvestris; stand characteristics; Pseudotsuga menziesii; light; Netherlands
DOI:
10.1016/j.foreco.2006.10.012

73. Effects of environment and progeny on biomass estimations of five hybrid poplar families grown at three contrasting sites across Europe

Author:
Dillen, S.Y.; Marron, N.; Bastien, C.; Ricciotti, L.; Salani, F.; Sabatti, M.; Pinel, M.P.C.; Rae, A.M.; Taylor, G.; Ceulemans, R.
Source:
Forest ecology and management 2007 v.252 no.1-3 pp. 12-23
ISSN:
0378-1127
Subject:
tree growth; genetic transformation; estimation; mathematical models; hybrids; forest trees; phenotype; branches; equations; allometry; regression analysis; crossing; environmental factors; genetic variation; Populus; dry matter partitioning; France; Italy; England
DOI:
10.1016/j.foreco.2007.06.003

74. Estimating Root Biomass in Rocky Soils using Pits, Cores, and Allometric Equations

Author:
Byung Bae Park; Ruth D. Yanai; Matthew A. Vadeboncoeur; Steven P. Hamburg
Source:
Soil Science Society of America journal 2007 v.71 no.1 pp. 206-213
ISSN:
0361-5995
Subject:
allometry; biomass; equations; fine roots; forest stands; hardwood forests; rocks; root systems; soil; soil compaction; wages and remuneration
Abstract:
... Measuring root biomass is time consuming and prone to sampling error. We compared three different methods of measuring root biomass in six northern hardwood stands at the Bartlett Experimental Forest. We found that root coring, the most common method of root sampling, yields estimates of fine root biomass about 27% greater than the estimates based on roots sampled in soil pits. Soil compaction con ...
DOI:
10.2136/sssaj2005.0329

75. Estimation of leaf area index in eucalypt forest with vertical foliage, using cover and fullframe fisheye photography

Author:
Macfarlane, C.; Arndt, S.K.; Livesley, S.J.; Edgar, A.C.; White, D.A.; Adams, M.A.; Eamus, D.
Source:
Forest ecology and management 2007 v.242 no.2-3 pp. 756-763
ISSN:
0378-1127
Subject:
leaf area index; Eucalyptus globulus; photography; canopy gaps; light; vegetation cover; tree crown; allometry; image analysis; regression analysis; tree and stand measurements; Victoria (Australia)
DOI:
10.1016/j.foreco.2007.02.021

76. Form and performance: body shape and prey-capture success in four drift-feeding minnows

Author:
Rincón, Pedro A.; Bastir, Markus; Grossman, Gary D.
Source:
Oecologia 2007 v.152 no.2 pp. 345-355
ISSN:
0029-8549
Subject:
allometry; fins; minnows; mouth; ontogeny; swimming
Abstract:
... Identifying links between morphology and performance for ecologically relevant tasks will help elucidate the relationships between organismal design and fitness. We conducted a laboratory study to quantify the relationship between variation in body shape and prey-capture success in four drift-feeding minnow species. We offered drifting prey to individual fish in a test flume, counted successful st ...
DOI:
10.1007/s00442-006-0651-5
PubMed:
17277930

77. Generalized allometric volume and biomass equations for some tree species in Europe

Author:
P. Muukkonen
Source:
European journal of forest research 2007 v.126 no.2 pp. 157-166
ISSN:
1612-4669
Subject:
allometry; biomass; ecosystems; equations; trees; Europe
Abstract:
... Since biomass is one of the key variables in ecosystem studies, widespread effort has aimed to facilitating its estimation. Numerous stand-specific volume and biomass equations are available, but these cannot be used for scaling up biomass to the regional level where several age-classes and structural types of stands coexist. Therefore simplified generalized volume and biomass equations are needed ...
DOI:
10.1007/s10342-007-0168-4

78. Genetic analysis of Pinus strobus and Pinus monticola populations from Canada using ISSR and RAPD markers: development of genome-specific SCAR markers

Author:
Mehes, M. S.; Nkongolo, K. K.; Michael, P.
Source:
Plant systematics and evolution 2007 v.267 no.1-4 pp. 47-63
ISSN:
0378-2697
Subject:
DNA; Pinus monticola; Pinus strobus; allometry; conifers; genetic markers; genetic variation; genome; microsatellite repeats; random amplified polymorphic DNA technique; Canada
Abstract:
... Pinus is the largest genus of conifers, containing over 100 species and is also the most widespread genus in the Northern Hemisphere. Pinus monticola and P. strobus are two closely related and economically important species in Canada. Morphological and allometric characteristics have been used to assess genetic variation within these two species but these markers are not reliable due to ecological ...
DOI:
10.1007/s00606-007-0534-1

79. Genotype and gender effects on sheep limb bone growth and maturation: selection for loin depth causes bone hypotrophy

Author:
Cake, M.A.; Boyce, M.D.; Gardner, G.E.; Hopkins, D.L.; Pethick, D.W.
Source:
Animal production science 2007 v.47 no.10 pp. 1128-1136
ISSN:
0816-1089
Subject:
carcass characteristics; lambs; bone mineralization; artificial selection; limb bones; loins; phenotype; males; skeletal muscle; genotype; sheep breeds; females; body measurements; loins (meat cut); animal growth; allometry; gender differences; magnesium; genetic variation; selection criteria
DOI:
10.1071/EA07058

80. Growth characteristics and allometry of Robinia pseudoacacia as a silvopastoral system component

Author:
Snyder, L.J. Unruh; Mueller, J.P.; Luginbuhl, J.M.; Brownie, C.
Source:
Agroforestry systems 2007 v.70 no.1 pp. 41-51
ISSN:
0167-4366
Subject:
Robinia pseudoacacia; allometry; biomass production; branches; coppicing; equations; forage; goats; meat; silvopastoral systems; spatial distribution; trees; United States
Abstract:
... Demand for goat (Capra hircus) meat in the southeastern USA is steadily increasing as a result of preferences exhibited by ethnic communities. Feeding systems that include fodder trees can be developed to take advantage of the natural preference of goats for browse. Data were collected for 2 years on a 5-year old stand of Robinia pseudoacacia L. to evaluate growth characteristics for goat browse a ...
DOI:
10.1007/s10457-007-9035-z

81. Habitat‐dependent geographical variation in ontogenetic allometry of the shiner perch Cymatogaster aggregata Gibbons (Teleostei: Embiotocidae)

Author:
P. J. WOODS
Source:
Journal of evolutionary biology 2007 v.20 no.5 pp. 1783-1798
ISSN:
1010-061X
Subject:
Hylobatidae; adults; allometry; geographical variation; habitats; head; perch; population dynamics; Pacific States
Abstract:
... Studies of intraspecific morphological variation in fishes have traditionally focused on freshwater rather than marine species. In addition, such studies typically focus on adults, although causes and intensities of selective pressures most likely vary through an individual's lifetime. In this study, body and head shape of a marine species, shiner perch Cymatogaster aggregata Gibbons were compared ...
DOI:
10.1111/j.1420-9101.2007.01386.x
PubMed:
17714296

82. Information-theory approach to allometric growth of marine organisms

Author:
Stelios Katsanevakis; Maria Thessalou-Legaki; Constantina Karlou-Riga; Eugenia Lefkaditou; Evagelos Dimitriou; George Verriopoulos
Source:
Marine biology 2007 v.151 no.3 pp. 949-959
ISSN:
0025-3162
Subject:
Pecten; Pinna nobilis; Sparus aurata; Todarodes; Trachurus trachurus; allometry; crabs; females; fish; linear models; males; mathematical theory; morphometry; regression analysis; shrimp; squid
Abstract:
... Allometric growth investigations are usually conducted by fitting the allometric model (L) [Formula: see text] (y, x are morphometric characters and b the allometric exponent), which is quite simple both conceptually and mathematically, and its parameters are easy to estimate by linear regression. However b is not necessarily constant and it may change either continuously or abruptly at specific b ...
DOI:
10.1007/s00227-006-0529-4

83. Investing in attachment: evolution of anchoring structures in acanthocephalan parasites

Author:
POULIN, ROBERT
Source:
Biological journal of the Linnean Society 2007 v.90 no.4 pp. 637-645
ISSN:
0024-4066
Subject:
allometry; proboscis
Abstract:
... Secure attachment to host tissues is essential for survival and reproduction in parasitic organisms. The production of elaborate attachment structures must be costly, however, and investments in attachment should be approximately proportional to the likelihood that a parasite will be dislodged. In the present study, relative investments in attachment as a function of body size and the type of host ...
DOI:
10.1111/j.1095-8312.2006.00754.x

84. Leaf traits affect the above-ground productivity and quality of pasture grasses

Author:
PONTES, L. DA S.; SOUSSANA, J.-F.; LOUAULT, F.; ANDUEZA, D.; CARRÈRE, P.
Source:
Functional ecology 2007 v.21 no.5 pp. 844-853
ISSN:
0269-8463
Subject:
allometry; correlation; crossing; crude protein; cutting; digestible energy; dry matter content; ecosystems; grasses; herbivores; interspecific variation; leaves; nitrogen content; pasture plants; pastures; primary productivity; proteins
Abstract:
... 1. By comparing plant species under the same experimental field conditions, the direct effects of plant traits on ecosystem processes can be studied. We have analyzed the role of leaf traits (leaf lamina dry matter content, LDMC; leaf lamina N content, LNC and specific leaf lamina area, SLA) for the annual above-ground primary productivity (ANPP) and quality (pepsin-cellulase digestibility, crude ...
DOI:
10.1111/j.1365-2435.2007.01316.x

85. Leaf-area index and light attenuation in rapidly expanding shrub thickets

Author:
Brantley, S.T.; Young, D.R.
Source:
Ecology 2007 v.88 no.2 pp. 524-530
ISSN:
0012-9658
Subject:
canopy; shrubs; islands; plant communities; photosynthetically active radiation; allometry; soil properties; leaf area index; ecological succession; understory; Morella cerifera; plant competition; grasslands; plant age; environmental monitoring; Virginia
DOI:
10.1890/06-0913
PubMed:
17479769

86. Modelling the changes in the proportions of the egg components during a laying cycle

Author:
Johnston, S.A.; Gous, R.M.
Source:
British poultry science 2007 v.48 no.3 pp. 347-353
ISSN:
0007-1668
Subject:
temporal variation; simulation models; laying hens; allometry; egg weight; egg yolk; nutrient requirements; genotype; genetic variation; animal age; egg composition
Abstract:
... 1. As hens age, egg weight increases but the eggs contain proportionally more yolk and less albumen and shell. However, at a given age, larger eggs contain proportionally more albumen. When modelling the nutrient requirements of the hen over a production cycle, based on the daily outputs of each nutrient, egg weight needs to be predicted as the sum of the three components, since each has a unique ...
DOI:
10.1080/00071660701381134
PubMed:
17578698

87. Permanent loss of wings in queens of the ant Odontomachus coquereli from Madagascar

Author:
M. Molet; C. Peeters; B. L. Fisher
Source:
Insectes sociaux 2007 v.54 no.2 pp. 183-188
ISSN:
0020-1812
Subject:
Nematoda; Odontomachus; allometry; demography; larvae; morphometry; phenotype; reproduction; reproductives; social insects; wings; Madagascar
Abstract:
... Winged queens are the most common reproductives in ants. They are morphologically specialized for independent colony foundation, with wings for long-range dispersal and metabolic reserves to raise the first brood. However independent foundation can sometimes be selected against and replaced by fission, featuring short-range dispersal on the ground and reproductives that are dependent on the wingle ...
DOI:
10.1007/s00040-007-0930-0

88. Postfire stand structure in a semiarid savanna: cross‐scale challenges estimating biomass

Author:
Cho-ying Huang; Stuart E. Marsh; Mitchel P. McClaran; Steven R. Archer
Source:
Ecological applications 2007 v.17 no.7 pp. 1899-1910
ISSN:
1051-0761
Subject:
savannas; semiarid zones; wildfires; woody plants; Prosopis velutina; wood; remote sensing; allometry; thematic maps; algorithms; Arizona
Abstract:
... Algorithms relating remotely sensed woody cover to biomass are often the basis for large‐scale inventories of aboveground carbon stocks. However, these algorithms are commonly applied in a generic fashion without consideration of disturbances that might alter vegetation structure. We compared field and remote sensing estimates of woody biomass on savannas with contrasting disturbance (fire) histor ...
DOI:
10.1890/06-1968.1

89. Rain, prey and predators: climatically driven shifts in frog abundance modify reproductive allometry in a tropical snake

Author:
Brown, Gregory P.; Shine, Richard
Source:
Oecologia 2007 v.154 no.2 pp. 361-368
ISSN:
0029-8549
Subject:
Colubridae; allometry; body size; climate change; climatic factors; data collection; eggs; fecundity; females; field experimentation; floodplains; frogs; predators; rain; reproductive performance; snakes; tropics; viability; wet season
Abstract:
... To predict the impacts of climate change on animal populations, we need long-term data sets on the effects of annual climatic variation on the demographic traits (growth, survival, reproductive output) that determine population viability. One frequent complication is that fecundity also depends upon maternal body size, a trait that often spans a wide range within a single population. During an eig ...
DOI:
10.1007/s00442-007-0842-8
PubMed:
17724615

90. Reconsidering the mechanistic basis of the metabolic theory of ecology

Author:
O'Connor, Michael P.; Kemp, Stanley J.; Agosta, Salvatore J.; Hansen, Frank; Sieg, Annette E.; Wallace, Bryan P.; McNair, James N.; Dunham, Arthur E.
Source:
Oikos 2007 v.116 no.6 pp. 1058-1072
ISSN:
0030-1299
Subject:
allometry; biochemical pathways; ecology
Abstract:
... The recently proposed metabolic theory of ecology (MTE) claims to provide a mechanistic explanation for long known allometric relationships between mass and metabolic rate. The MTE postulates that these patterns of allometry are driven by the primary selective constraint of transport of energy and materials. However, recent evidence along several different lines has called into question both the a ...
DOI:
10.1111/j.2006.0030-1299.15534.x

91. Scaling mass and morphology in leaves: an extension of the wbe model

Author:
Charles A. Price; Brian J. Enquist
Source:
Ecology 2007 v.88 no.5 pp. 1132-1141
ISSN:
0012-9658
Subject:
arid zones; metabolism; allometry; temperate forests; Magnoliopsida; models; leaf area; petioles; biodiversity; plant morphology; prediction; Arizona; Tennessee
Abstract:
... Recent advances in metabolic scaling theory have highlighted the importance of exchange surfaces and vascular network geometry in understanding the integration and scaling of whole‐plant form and function. Additional work on leaf form and function has also highlighted general scaling relationships for many leaf traits. However, it is unclear if a common theoretical framework can reveal the general ...
DOI:
10.1890/06-1158
PubMed:
17536400

92. Soil respiration and carbon balance in a subtropical native forest and two managed plantations

Author:
Yang, Yu-Sheng; Chen, Guang-Shui; Guo, Jian-Fen; Xie, Jin-Sheng; Wang, Xiao-Guo
Source:
Plant ecology 2007 v.193 no.1 pp. 71-84
ISSN:
1385-0237
Subject:
Castanopsis; Cunninghamia lanceolata; absorbance; aerial parts; allometry; biomass; carbon; carbon sinks; conservation areas; forest trees; forests; landscapes; net ecosystem production; plantations; primary productivity; roots; soil; soil respiration; spring; summer; traps; China
Abstract:
... From 1999 to 2003, a range of carbon fluxes was measured and integrated to establish a carbon balance for a natural evergreen forest of Castanopsis kawakamii (NF) and adjacent monoculture evergreen plantations of C. kawakamii (CK) and Chinese fir (Cunninghamia lanceolata, CF) in Sanming Nature Reserve, Fujian, China. Biomass carbon increment of aboveground parts and coarse roots were measured by t ...
DOI:
10.1007/s11258-006-9249-6

93. Stand biometry and leaf area distribution in an old olive grove at Andria, southern Italy

Author:
Jan Čermák; Jan Gašpárek; Francesca De Lorenzi; Hamlyn G. Jones
Source:
Annals of forest science 2007 v.64 no.5 pp. 491-501
ISSN:
1286-4560
Subject:
Olea europaea; allometry; biometry; canopy; image analysis; leaf area index; leaves; models; olives; photographs; stems; stocking rate; trees; Italy
Abstract:
... The objectives of this paper were (1) to provide general biometry data for an 80-year-old olive (Olea europea L., cv. Coratina) grove in Andria, southern Italy, and (2) to compare different methods for estimating leaf area distributions. Stand biometry was represented by a stocking density of 132 trees ha⁻¹, mean spacing of 8.7 m and mean social area (proportional to spacing and tree size) of abou ...
DOI:
10.1051/forest:2007026

94. TESTING THE METABOLIC THEORY OF ECOLOGY: ALLOMETRIC SCALING EXPONENTS IN MAMMALS

Author:
Richard P. Duncan; David M. Forsyth; Jim Hone
Source:
Ecology 2007 v.88 no.2 pp. 324-333
ISSN:
0012-9658
Subject:
models; equations; metabolism; allometry; animal ecology; mammals; population growth; body weight; prediction; animal reproduction; phylogeny; least squares; animal age; body size; life history
Abstract:
... Many fundamental traits of species measured at different levels of biological organization appear to scale as a power law to body mass (M) with exponents that are multiples of ¼. Recent work has united these relationships in a “metabolic theory of ecology” (MTE) that explains the pervasiveness of quarter‐power scaling by its dependence on basal metabolic rate (B), which scales as M⁰.⁷⁵. Central to ...
DOI:
10.1890/0012-9658(2007)88[324:TTMTOE]2.0.CO;2
PubMed:
17479751

95. Within and Between Species Variation in Male Mating Behaviors in the Mexican Sailfin Mollies Poecilia velifera and P. petenensis

Author:
Hankison, Shala J.; Ptacek, Margaret B.
Source:
Ethology 2007 v.113 no.8 pp. 802-812
ISSN:
0179-1613
Subject:
interspecific variation; insemination; evolution; allometry; males; courtship; body length; Poecilia; habitats; females
Abstract:
... Polymorphism in male morphology is often correlated with the expression of alternate behavioral tactics. This relationship between behavioral and morphological polymorphisms, however, is less well understood. We characterized male mating behaviors and morphological variation within and between Poecilia velifera and P. petenensis to understand mating signal evolution in the sailfin molly lineage. I ...
DOI:
10.1111/j.1439-0310.2007.01388.x

96. The size-grain hypothesis: do macroarthropods see a fractal world

Author:
KASPARI, MICHAEL; WEISER, MICHAEL
Source:
Ecological entomology 2007 v.32 no.3 pp. 279-282
ISSN:
0307-6946
Subject:
Acari; Coleoptera; Collembola; Pseudoscorpiones; allometry; arthropods; body length; legs; mammals; plant litter; Panama
Abstract:
... 1. In the size-grain hypothesis (a) long legs allow walking organisms to step over gaps and pores in substrate but prohibit them from entering those gaps; (b) the world is more rugose for small organisms; and (c) the relative cost of long legs increases as organisms grow smaller. The hypothesis predicts a positive allometry of leg length (= massb where b > 0.33 of isometry), a pattern that robustl ...
DOI:
10.1111/j.1365-2311.2007.00870.x