PubAg

Main content area

You searched for: Journal Oecologia Remove constraint Journal: Oecologia Publication Year 2017 Remove constraint Publication Year: 2017 Source 2017 v.185 no.2 Remove constraint Source: 2017 v.185 no.2
Start Over

Search

15  Search Results

1 - 15 of 15
Number of results to display per page

Search Results

1. Body mass and wing shape explain variability in broad-scale bird species distributions of migratory passerines along an ecological barrier during stopover

Author:
Buler, Jeffrey J.; Lyon, Rebecca J.; Smolinsky, Jaclyn A.; Zenzal, Theodore J., Jr.; Moore, Frank R.
Source:
Oecologia 2017 v.185 no.2 pp. 205-212
ISSN:
0029-8549
Subject:
Passeriformes; autumn; coasts; energy expenditure; flight; habitats; lean body mass; migratory birds; spring; wings; Gulf of Mexico
Abstract:
... Migrating birds are under selective pressure to complete long-distance flights quickly and efficiently. Wing morphology and body mass influence energy expenditure of flight, such that certain characteristics may confer a greater relative advantage when making long crossings over ecological barriers by modifying the flight range or speed. We explored the possibility, among light (mass <50 g) migrat ...
DOI:
10.1007/s00442-017-3936-y

2. Chronic stress, energy transduction, and free-radical production in a reptile

Author:
Voituron, Yann; Josserand, Rémy; Le Galliard, Jean-François; Haussy, Claudy; Roussel, Damien; Romestaing, Caroline; Meylan, Sandrine
Source:
Oecologia 2017 v.185 no.2 pp. 195-203
ISSN:
0029-8549
Subject:
adenosine triphosphate; chronic exposure; corticosterone; energy; life history; liver; mitochondria; models; oxidative phosphorylation; oxygen consumption; placebos; prediction; protein content; reptiles; stress response
Abstract:
... Stress hormones, such as corticosterone, play a crucial role in orchestrating physiological reaction patterns shaping adapted responses to stressful environments. Concepts aiming at predicting individual and population responses to environmental stress typically consider that stress hormones and their effects on metabolic rate provide appropriate proxies for the energy budget. However, uncoupling ...
DOI:
10.1007/s00442-017-3933-1

3. Distance- and density-dependent leaf dynamics of seedlings of a tropical rainforest tree

Author:
Numata, Shinya; Kachi, Naoki; Okuda, Toshinori; Manokaran, N.
Source:
Oecologia 2017 v.185 no.2 pp. 213-220
ISSN:
0029-8549
Subject:
Shorea; canopy; demography; leaves; plant density; prediction; progeny; seedlings; survival rate; trees; tropical rain forests; Malaysia
Abstract:
... Parental distance and plant density dependence of seedling leaf turnover and survival was examined to investigate predictions of the Janzen–Connell hypothesis. The focal study species, Shorea macroptera is a canopy tree species in a lowland rain forest in peninsular Malaysia. We found that the peak of the distribution of plants shifted from 3–6 m to 6–9 m during the course of the change from seedl ...
DOI:
10.1007/s00442-017-3935-z

4. Habitat fragmentation leads to reduced pollinator visitation, fruit production and recruitment in urban mangrove forests

Author:
Hermansen, Tyge D.; Minchinton, Todd E.; Ayre, David J.
Source:
Oecologia 2017 v.185 no.2 pp. 221-231
ISSN:
0029-8549
Subject:
survival rate; seedlings; mangrove forests; pollinators; honey bees; fruit quality; genotype; habitat fragmentation; pollen; habitats; estuaries; prediction
Abstract:
... Mangrove forests worldwide undergo anthropogenic fragmentation that may threaten their existence, and yet there have been few tests of the effects of fragmentation on demographic processes critical for mangrove regeneration. Predicting the effects of habitat fragmentation on mangroves is problematic as pollinators may move more freely across water than terrestrial habitat, and propagules can be wi ...
DOI:
10.1007/s00442-017-3941-1

5. Intraspecific variation in fruit–frugivore interactions: effects of fruiting neighborhood and consequences for seed dispersal

Author:
Guerra, Tadeu J.; Dayrell, Roberta L. C.; Arruda, André J.; Dáttilo, Wesley; Teixido, Alberto L.; Messeder, João V. S.; Silveira, Fernando A. O.
Source:
Oecologia 2017 v.185 no.2 pp. 233-243
ISSN:
0029-8549
Subject:
Miconia; birds; frugivores; fruit crops; fruiting; intraspecific variation; niches; seed dispersal
Abstract:
... The extent of specialization/generalization continuum in fruit–frugivore interactions at the individual level remains poorly explored. Here, we investigated the interactions between the Neotropical treelet Miconia irwinii (Melastomataceae) and its avian seed dispersers in Brazilian campo rupestre. We built an individual-based network to derive plant degree of interaction specialization regarding d ...
DOI:
10.1007/s00442-017-3943-z

6. Metabolism or behavior: explaining the performance of aphids on alkaloid-producing fungal endophytes in annual ryegrass (Lolium multiflorum)

Author:
Bastias, Daniel A.; Ueno, Andrea C.; Machado Assefh, Cristina R.; Alvarez, Adriana E.; Young, Carolyn A.; Gundel, Pedro E.
Source:
Oecologia 2017 v.185 no.2 pp. 245-256
ISSN:
0029-8549
Subject:
Lolium multiflorum; Rhopalosiphum padi; alkaloids; birth rate; endophytes; fungi; grasses; ingestion; metabolism; morphometry; mutualism; phloem; phytophagous insects; population growth; population size; sap
Abstract:
... Plant–herbivore interactions are often mediated by plant microorganisms, and the “defensive mutualism” of epichloid fungal endophytes of grasses is an example. These endophytes synthesize bioactive alkaloids that generally have detrimental effects on the performance of insect herbivores, but the underlying mechanisms are not well understood. Our objective was to determine whether changes in the ph ...
DOI:
10.1007/s00442-017-3940-2

7. Multitrophic interactions mediate the effects of climate change on herbivore abundance

Author:
Robinson, Ayla; Inouye, David W.; Ogilvie, Jane E.; Mooney, Emily H.
Source:
Oecologia 2017 v.185 no.2 pp. 181-190
ISSN:
0029-8549
Subject:
Aphis (Aphididae); Formicidae; Ligusticum porteri; Lygus; climate; climate change; flowering; food webs; host plants; mutualism; observational studies; phenology; phytophagous insects; population density; population growth; population size; predators; prediction; snowmelt; temperature
Abstract:
... Climate change can influence the abundance of insect herbivores through direct and indirect mechanisms. In this study, we evaluated multitrophic drivers of herbivore abundance for an aphid species (Aphis helianthi) in a subalpine food web consisting of a host plant (Ligusticum porteri), mutualist ants and predatory lygus bugs (Lygus spp.). We used a model-selection approach to determine which clim ...
DOI:
10.1007/s00442-017-3934-0

8. Phosphorus and nitrogen co-limitation of forest ground vegetation under elevated anthropogenic nitrogen deposition

Author:
Hedwall, Per-Ola; Bergh, Johan; Brunet, Jörg
Source:
Oecologia 2017 v.185 no.2 pp. 317-326
ISSN:
0029-8549
Subject:
plant growth; vascular plants; nitrogen; phosphorus; ground vegetation; trees; species diversity; forest ecosystems; Bryophyta; nutrients; stand basal area; forests; Sweden
Abstract:
... Plant growth in northern forest ecosystems is considered to be primarily nitrogen limited. Nitrogen deposition is predicted to change this towards co-limitation/limitation by other nutrients (e.g., phosphorus), although evidence of such stoichiometric effects is scarce. We utilized two forest fertilization experiments in southern Sweden to analyze single and combined effects of nitrogen and phosph ...
DOI:
10.1007/s00442-017-3945-x
PubMed:
28884383
PubMed Central:
PMC5617880

9. Phosphorus and nitrogen resorption from different chemical fractions in senescing leaves of tropical tree species on Mount Kinabalu, Borneo

Author:
Tsujii, Yuki; Onoda, Yusuke; Kitayama, Kanehiro
Source:
Oecologia 2017 v.185 no.2 pp. 171-180
ISSN:
0029-8549
Subject:
biochemical mechanisms; chemical constituents of plants; environmental factors; leaf abscission; leaves; lipids; nitrogen; nucleic acids; nutrients; organic compounds; phosphorus; soil; tissues; trees; tropical plants; Borneo
Abstract:
... Nutrient resorption, a process by which plants degrade organic compounds and resorb their nutrients from senescing tissues, is a crucial plant function to increase growth and fitness in nutrient-poor environments. Tropical trees on phosphorus (P)-poor soils are particularly known to have high P-resorption efficiency (PRE, the percentage of P resorbed from senescing leaves before abscission per tot ...
DOI:
10.1007/s00442-017-3938-9

10. Plant sex affects the structure of plant–pollinator networks in a subtropical forest

Author:
Zhang, Minhua; He, Fangliang
Source:
Oecologia 2017 v.185 no.2 pp. 269-279
ISSN:
0029-8549
Subject:
dioecy; ecological differentiation; female plants; females; hermaphroditism; male plants; males; nestedness; plant communities; pollination; pollinators; tropical forests; China
Abstract:
... Although it has long been recognized that the diversified sexual systems of plants could influence community patterns and pollination specialization, plant sex is not usually incorporated to quantify plant–pollinator networks. In this study, we observed 1776 visitations corresponding to 84 pollinator species and 28 plant species (19 sexually monomorphic plants and 9 dioecious plants) in a subtropi ...
DOI:
10.1007/s00442-017-3942-0

11. Relationships among leaf functional traits, litter traits, and mass loss during early phases of leaf litter decomposition in 12 woody plant species

Author:
Zukswert, Jenna M.; Prescott, Cindy E.
Source:
Oecologia 2017 v.185 no.2 pp. 305-316
ISSN:
0029-8549
Subject:
dry matter content; indigenous species; leaching; leaf area; leaves; lignin; nitrogen; nitrogen content; plant litter; tissues; water uptake; woody plants; British Columbia
Abstract:
... Litter ‘quality’ or decomposability has historically been estimated through measuring chemical attributes, such as concentrations of nitrogen or ‘lignin’. More recently, foliar functional traits, which may incorporate indications of the physical structures of tissues, have been found to correlate with litter mass loss rates. However, these traits may not be adequate to predict early rates of mass ...
DOI:
10.1007/s00442-017-3951-z

12. Staying cool or staying safe in a human-dominated landscape: which is more relevant for brown bears?

Author:
Ordiz, Andrés; Støen, Ole-Gunnar; Delibes, Miguel; Swenson, Jon E.
Source:
Oecologia 2017 v.185 no.2 pp. 191-194
ISSN:
0029-8549
Subject:
Ursus arctos; ambient temperature; habitat preferences; humans; landscapes; managers; thermoregulation; wildlife; Alberta
Abstract:
... Pigeon et al. (2016) Staying cool in a changing landscape: the influence of maximum daily ambient temperature on grizzly bear habitat selection. Oecologia 181:1101. doi: 10.1007/s00442-016-3630-5 analyzed the effect of ambient temperature on the habitat selection of grizzly bears (Ursus arctos) in Alberta, Canada. They concluded that temperature played a significant role in bear habitat selection ...
DOI:
10.1007/s00442-017-3948-7
PubMed:
28887693
PubMed Central:
PMC5617871

13. Structural complexity and fish body size interactively affect habitat optimality

Author:
Yeager, Mallarie E.; Hovel, Kevin A.
Source:
Oecologia 2017 v.185 no.2 pp. 257-267
ISSN:
0029-8549
Subject:
Zostera marina; body size; fish; foraging; habitat preferences; habitats; juveniles; models; ontogeny; predation; predator-prey relationships; risk; seagrasses; California
Abstract:
... Predator–prey interactions are strongly influenced by habitat structure, particularly in coastal marine habitats such as seagrasses in which structural complexity (SC) may vary over small spatial scales. For seagrass mesopredators such as juvenile fishes, optimality models predict that fitness will be maximized at levels of SC that enhance foraging but minimize predation risk, both of which are fu ...
DOI:
10.1007/s00442-017-3932-2

14. Top-down effects of an invasive omnivore: detection in long-term monitoring of large-river reservoir chlorophyll-a

Author:
Tumolo, Benjamin B.; Flinn, Michael B.
Source:
Oecologia 2017 v.185 no.2 pp. 293-303
ISSN:
0029-8549
Subject:
Hypophthalmichthys molitrix; chlorophyll; ecosystems; food webs; global change; habitats; introduced species; invasive species; lakes; monitoring; omnivores; phytoplankton; summer; Great Lakes; Kentucky
Abstract:
... Invasive species are capable of altering ecosystems through the consumption of basal resources. However, quantifying the effects of invasive species in large ecosystems is challenging. Measuring changes in basal resources (i.e., phytoplankton) at an ecosystem scale is an important and potentially translatable response vital to the understanding of how introduced species influence ecosystems. In th ...
DOI:
10.1007/s00442-017-3937-x

15. Trait shifts associated with the subshrub life-history strategy in a tropical savanna

Author:
Giroldo, A. B.; Scariot, A.; Hoffmann, W. A.
Source:
Oecologia 2017 v.185 no.2 pp. 281-291
ISSN:
0029-8549
Subject:
adults; biomass; convergent evolution; dry matter partitioning; early development; fire frequency; flora; germination; life history; photosynthesis; phylogeny; savannas; seedlings; trees; woody plants
Abstract:
... Over the past 10 million years, tropical savanna environments have selected for small growth forms within woody plant lineages. The result has been the evolution of subshrubs (geoxyles), presumably as an adaptation to frequent fire. To evaluate the traits associated with the shift from tree to subshrub growth forms, we compared seed biomass, germination, survival, resprouting, biomass allocation, ...
DOI:
10.1007/s00442-017-3930-4