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You searched for: Subject term allometry Remove constraint Subject term: allometry Subject term France Remove constraint Subject term: France
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1. A critical appraisal of allometric growth among alpine cirques based on multivariate statistics and spatial analysis

Author:
Magali Delmas; Yanni Gunnell; Marc Calvet
Source:
Geomorphology 2015 v.228 pp. 637-652
ISSN:
0169-555X
Subject:
allometry; bedrock; climatic factors; freeze-thaw cycles; glaciation; glaciers; gneiss; granite; landscapes; morphometry; multivariate analysis; principal component analysis; topography; France
Abstract:
... When considering the morphometric attributes of a glacial cirque, imbalances between length, width, and amplitude have been deemed relevant tools for discriminating between two possible pathways of cirque growth: downwearing by glaciers or backwearing by freeze–thaw processes. Based on a sample of 1071 cirques in the French Pyrenees, we reframe the concern for climatic variables by also granting s ...
DOI:
10.1016/j.geomorph.2014.10.021

2. A generic information framework for decision-making in a forest-based bio-economy

Author:
Jean-Baptiste Pichancourt; Rodolphe Bauer; Antoine Billard; Maree Brennan; Sylvain Caurla; Antoine Colin; Adrien Contini; Sylvain Cosgun; Henri Cuny; Stéphane Dumarçay; Mathieu Fortin; Philippe Gérardin; David Jean Hentges; Fleur Longuetaud; Béatrice Richard; Holger Wernsdörfer; Francis Colin
Source:
Annals of forest science 2021 v.78 no.4 pp. 97
ISSN:
1286-4560
Subject:
Abies alba; allometry; bioeconomics; biomass; decision making; forest growth; forests; habitats; supply chain; trees; wood; France
Abstract:
... KEY MESSAGE : We present a methodological framework that both scientists and supply chain actors can mobilise to organise information at different scales of observation, and further make informed decisions regarding the supply and extraction of bio-molecules from forest biomass. We demonstrate its usefulness for extracting bio-molecules contained in silver fir growing in France. CONTEXT : Numerous ...
DOI:
10.1007/s13595-021-01110-y

3. A new approach to optimal discretization of plant functional types in a process‐based ecosystem model with forest management: a case study for temperate conifers

Author:
Marc Peaucelle; Valentin Bellassen; Philippe Ciais; Josep Peñuelas; Nicolas Viovy
Source:
Global ecology and biogeography 2017 v.26 no.4 pp. 486-499
ISSN:
1466-822X
Subject:
Abies alba; Picea abies; Pinus pinaster; Pinus sylvestris; Pseudotsuga menziesii; allometry; biomass; case studies; coniferous forests; conifers; databases; ecosystems; forest management; models; phenology; photosynthesis; spatial variation; stand density; France
Abstract:
... AIM: Dynamic global vegetation models (DGVMs) use a discretization of forest vegetation based on plant functional types (PFTs). The physiological and ecological parameters used to model a given PFT are usually fixed, being defined from point‐based observations, while model applications are often grid‐based. This rigid approach causes spatial biases in the results of DGVM‐simulated productivity and ...
DOI:
10.1111/geb.12557

4. Age determination in leverets of European hare Lepus europaeus based on body measurements

Author:
Yves Bray; Stephane Champely; Dominique Soyez
Source:
Wildlife biology 2002 v.8 no.1 pp. 31-39
ISSN:
0909-6396
Subject:
Lepus europaeus; age determination; allometry; body measurements; ears; feet; growth curves; hares; models; morphometry; rearing; skull; France
Abstract:
... The objective of our work was to provide allometric relationships between different body measurements and age of young leverets of European hare Lepus europaeus (less than two months old) for use in live‐trapping studies. Five morphometric variables were measured to predict the age of leverets: body mass, skull length, skull width, hind foot length and ear length. The hares came from two rearing c ...
DOI:
10.2981/wlb.2002.005

5. Allometric relationships between nitrogen uptake and transpiration to untangle interactions between nitrogen supply and drought in maize and sorghum

Author:
Taise Robinson Kunrath; Gilles Lemaire; Edmar Teixeira; Hamish E. Brown; Ignacio A. Ciampitti; Victor O. Sadras
Source:
European journal of agronomy 2020 v.120 pp. 126145
ISSN:
1161-0301
Subject:
Sorghum bicolor; Zea mays; agronomy; allometry; biomass; corn; crop yield; drought; evapotranspiration; nitrogen; nitrogen content; nutrition; transpiration; water stress; water use efficiency; France; New Zealand
Abstract:
... Worldwide supply of water and nitrogen (N) are critical to crop yield with multiple interactions that need to be untangled. We used an allometric framework to quantify the dynamic relationships between crop growth, transpiration and N uptake in maize (Zea mays L.) and sorghum (Sorghum bicolor L.) using published data from experiments in France, New Zealand and United States. Our analysis highlight ...
DOI:
10.1016/j.eja.2020.126145

6. Assessing Biomass Removal and Woody Debris in Whole-Tree Harvesting System: Are the Recommended Levels of Residues Ensured?

Author:
Abdelwahab Bessaad; Isabelle Bilger; Nathalie Korboulewsky
Source:
Forests 2021 v.12 no.6 pp. -
ISSN:
1999-4907
Subject:
aboveground biomass; allometry; biodiversity; coarse woody debris; forest litter; forests; fuelwood; habitats; inventories; soil nutrients; sustainable forestry; trees; France
Abstract:
... Forest biomass is a sustainable source of renewable energy and a valuable alternative to finite fossil fuels. However, its overharvesting may lead to soil nutrient depletion and threaten future stand productivity, as well as affect the habitat for biodiversity. This paper provides quantitative data on biomass removal, fine woody debris [d ≤ 7 cm], and coarse woody debris [d > 7 cm] left on the for ...
DOI:
10.3390/f12060807

7. Data and non-linear models for the estimation of biomass growth and carbon fixation in managed forests

Author:
Ariane Albers; Pierre Collet; Anthony Benoist; Arnaud Hélias
Source:
Data in Brief 2019 v.23 pp. 103841
ISSN:
2352-3409
Subject:
allometry; biomass; carbon; carbon dioxide fixation; carbon sequestration; climate change; forest stands; statistics; supply chain; trees; wood; France
Abstract:
... The data and analyses presented support the research article entitled “Coupling partial-equilibrium and dynamic biogenic carbon models to assess future transport scenarios in France” (Albers et al., 2019). Carbon sequestration and storage in forestry products (e.g. transport fuels) is sought as a climate change mitigation option. The data presented support and inform dynamic modelling approaches t ...
DOI:
10.1016/j.dib.2019.103841

8. Development and evaluation of HUME-OSR: A dynamic crop growth model for winter oilseed rape

Author:
Ulf Böttcher; Wiebke Weymann; Jeroen W.M. Pullens; Jørgen E. Olesen; Henning Kage
Source:
Field crops research 2020 v.246 pp. 107679
ISSN:
0378-4290
Subject:
Brassica napus; absorption; administrative management; allometry; area; breeding; climate change; crop models; data collection; dry matter accumulation; field crops; flowers; freezing; harvest index; hibernation; leaves; light; nitrogen; oils; prediction; regression analysis; research; seed yield; sowing date; synthesis; variability; winter; France; Germany; Great Britain
Abstract:
... A new dynamic crop growth model based on empirically derived allometric partitioning rules was developed for winter oilseed rape. The model simulates dry matter production, nitrogen uptake and distribution, leaf, stem and pod area expansion and yield formation under optimal and water- and nitrogen-limited conditions.The model includes hibernation, senescence due to self-shading, freezing and aging ...
DOI:
10.1016/j.fcr.2019.107679

9. Effect of initial fertilisation on biomass and nutrient contentof Norway spruce and Douglas-fir plantations at the same site

Author:
C. Sicard; L. Saint-Andre; D. Gelhaye; J. Ranger
Source:
Trees 2006 v.20 no.2 pp. 229-246
ISSN:
0931-1890
Subject:
Monte Carlo method; Picea abies; Pseudotsuga menziesii; allometry; biomass; calcium; carbon; ecosystems; equations; forest inventory; forests; leaves; magnesium; mountains; nutrient content; nutrient use efficiency; nutrients; plantations; potassium; soil fertility; stand density; stand structure; stemwood; timber production; tree growth; trees; wood density; France
Abstract:
... Norway spruce (NS) and Douglas-fir (DF) are among the main species used for production forestry in France. In low-elevation mountains and under-acidic conditions, they often occupy the same ecological situations. It is therefore of paramount interest to have a good understanding of how the two species behave under similar conditions and how they react to site improvement by fertilisation. The stud ...
DOI:
10.1007/s00468-005-0030-6

10. 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

11. Evaluating forest biometrics obtained from ground lidar in complex riparian forests

Author:
Alexander S. Antonarakis
Source:
Remote sensing letters 2011 v.2 no.1 pp. 61-70
ISSN:
2150-7058
Subject:
Populus nigra; allometry; biometry; biosphere; ecosystems; forest inventory; hybrids; lasers; lidar; remote sensing; riparian forests; rivers; scanners; tree and stand measurements; trees; France
Abstract:
... Terrestrial laser scanning is a technique that has been used increasingly in extracting forest biometrics such as trunk diameter and tree heights. Its potential, however, has not been fully explored in complex forested ecosystems, especially in riparian forests, considered among the most dynamic and complex portions of the Earth's biosphere. In this study, forest inventory data and multiple ground ...
DOI:
10.1080/01431161.2010.493899

12. Evidence of climate effects on the height-diameter relationships of tree species

Author:
Mathieu Fortin; Rosalinde Van Couwenberghe; Vincent Perez; Christian Piedallu
Source:
Annals of forest science 2019 v.76 no.1 pp. 1
ISSN:
1286-4560
Subject:
allometry; biomass; climatic factors; forestry; forests; harvesting; models; socioeconomic status; temperature; trees; France
Abstract:
... KEY MESSAGE : The mean temperature from March to September affects the height-diameter relationship of many tree species in France. For most of these species, the temperature effect is nonlinear, which makes the identification of an optimal temperature possible. Increases in mean temperature could impact the volume supply of commercial species by the end of the twenty-first century. CONTEXT: Heigh ...
DOI:
10.1007/s13595-018-0784-9

13. Forest Carbon Sequestration, Pathogens and the Costs of the EU’s 2050 Climate Targets

Author:
Ing-Marie Gren; Abenezer Zeleke Aklilu; Katarina Elofsson
Source:
Forests 2018 v.9 no.9 pp. -
ISSN:
1999-4907
Subject:
European Union; allometry; carbon sequestration; carbon sinks; climate; climate change; emissions; forest growth; forest land; forests; fossil fuels; models; pathogens; production functions; France; Germany; Italy; Romania; Spain
Abstract:
... Carbon sequestration is suggested as a low-cost option for climate change mitigation, the functioning of which can be threatened by pathogen infestation. This study calculates the effects of infectious pathogens on the cost of achieving the EU’s 2050 climate targets by combining the so-called production function method with the replacement cost method. Pathogens are then assumed to affect ca ...
DOI:
10.3390/f9090542

14. Individual variability in tree allometry determines light resource allocation in forest ecosystems: a hierarchical Bayesian approach

Author:
Vieilledent, Ghislain; Courbaud, Benoît; Kunstler, Georges; Dhôte, Jean-François; Clark, James S.
Source:
Oecologia 2010 v.163 no.3 pp. 759-773
ISSN:
0029-8549
Subject:
Abies alba; Bayesian theory; Picea abies; allometry; canopy; forest ecosystems; forest stands; forests; interspecific variation; intraspecific variation; microhabitats; models; phenotypic plasticity; resource allocation; trees; Alps region
Abstract:
... Tree species differences in crown size and shape are often highlighted as key characteristics determining light interception strategies and successional dynamics. The phenotypic plasticity of species in response to light and space availability suggests that intraspecific variability can have potential consequences on light interception and community dynamics. Species crown size varies depending on ...
DOI:
10.1007/s00442-010-1581-9
PubMed:
20169451

15. Inferring the trophic attributes and consequences of co-occurring lake invaders using an allometric niche model

Author:
Chloé Vagnon; Franck Cattanéo; Jean Guillard; Victor Frossard
Source:
Biological invasions 2022 v.24 no.6 pp. 1661-1676
ISSN:
1387-3547
Subject:
Hemimysis anomala; Silurus glanis; allometry; catfish; diet; ecological invasion; ecosystems; food webs; invertebrates; lakes; models; ontogeny; predation; France
Abstract:
... Identifying the trophic attributes of co-occurring invaders is a prerequisite to anticipate and mitigate their simultaneous impacts. We used an allometric niche model (aNM) to infer the trophic attributes of a mysid (Hemimysis anomala) and a catfish (Silurus glanis) that recently colonized the largest natural lake in France (Lake Bourget) and we raised the potential consequences of this multispeci ...
DOI:
10.1007/s10530-022-02745-2

16. Locating wildlife crossings for multispecies connectivity across linear infrastructures

Author:
Anne Mimet; Céline Clauzel; Jean-Christophe Foltête
Source:
Landscape ecology 2016 v.31 no.9 pp. 1955-1973
ISSN:
0921-2973
Subject:
allometry; habitats; highways; mammals; multivariate analysis; wildlife; France
Abstract:
... CONTEXT: Linear transportation infrastructures traverse and separate wildlife populations, potentially leading to their short- and long-term decline at local and regional scales. To attenuate such effects, we need wildlife crossings suitable for a wide range of species. OBJECTIVES: We propose a method for identifying the best locations for wildlife crossings along linear infrastructures so as to i ...
DOI:
10.1007/s10980-016-0373-y

17. Mandible morphology as a tool to investigate origin, adaptation and stress in invasive alien species: first insights into Callosciurus erythraeus (Rodentia: Sciuridae) in Europe

Author:
M. V. Mazzamuto; H.-J. Su; G. Guidarelli; D. Preatoni; L. F. Russo; A. Loy; A. Martinoli
Source:
The European zoological journal 2021 v.88 no.1 pp. 782-795
ISSN:
2475-0263
Subject:
Callosciurus; allometry; introduced species; invasive species; population dynamics; squirrels; Belgium; France; Italy
Abstract:
... When an alien species is introduced in a new area, the new population may be genetically and phenotypically different from the parent population because of the population bottleneck, increased inbreeding rate and adaptation to the new environment. In this study we investigated the variation in shape and size of the mandible among and within three populations of the invasive Pallas’s squirrel intro ...
DOI:
10.1080/24750263.2021.1943548

18. Modelling the plankton groups of the deep, peri-alpine Lake Bourget

Author:
Onur Kerimoglu; Stéphan Jacquet; Brigitte Vinçon-Leite; Bruno J. Lemaire; Frédéric Rimet; Frédéric Soulignac; Dominique Trévisan; Orlane Anneville
Source:
Ecological modelling 2017 v.359 pp. 415-433
ISSN:
0304-3800
Subject:
turbulent flow; phytoplankton; dynamic models; food webs; inorganic phosphorus; lakes; allometry; herbivores; carbon; growing season; Planktothrix rubescens; species diversity; carnivores; autotrophs; aquatic ecosystems; zooplankton; prediction; France
Abstract:
... Predicting phytoplankton succession and variability in natural systems remains to be a grand challenge in aquatic ecosystems research. In this study, we identified six major plankton groups in Lake Bourget (France), based on cell size, taxonomic properties, food-web interactions and occurrence patterns: cyanobacterium Planktothrix rubescens, small and large phytoplankton, mixotrophs, herbivorous a ...
DOI:
10.1016/j.ecolmodel.2017.06.005

19. Morphological and phenological shoot plasticity in a Mediterranean evergreen oak facing long-term increased drought

Author:
Jean-Marc Limousin; Serge Rambal; Jean-Marc Ourcival; Jesus Rodríguez-Calcerrada; Ignacio M. Pérez-Ramos; Raquel Rodríguez-Cortina; Laurent Misson; Richard Joffre
Source:
Oecologia 2012 v.169 no.2 pp. 565-577
ISSN:
0029-8549
Subject:
Quercus ilex; allometry; branches; canopy; drought; forest stands; leaf area index; leaf development; leaves; longevity; phenology; sapwood; shoots; summer; transpiration; trees
Abstract:
... Mediterranean trees must adjust their canopy leaf area to the unpredictable timing and severity of summer drought. The impact of increased drought on the canopy dynamics of the evergreen Quercus ilex was studied by measuring shoot growth, leaf production, litterfall, leafing phenology and leaf demography in a mature forest stand submitted to partial throughfall exclusion for 7 years. The leaf area ...
DOI:
10.1007/s00442-011-2221-8
PubMed:
22159896

20. Morphological variation in Hemisarcoptes (Acari: Hemisarcoptidae): application of multivariate morphometric analyses

Author:
Houck, M.A.; OConnor, B.M.
Source:
Annals of the Entomological Society of America 1998 v.91 no.3 pp. 335-349
ISSN:
0013-8746
Subject:
discriminant analysis; ova; allometry; geographical variation; principal component analysis; gender differences; Astigmata; body length; anatomy and morphology; multivariate analysis; shape; France; New York; Texas; California
Abstract:
... Mites of the genus Hemisarcoptes were collected from 4 geographically isolated portions of their distribution: California, France, New York, and Texas. An analysis of variance, a principal component analysis (PCA), a discriminant function analysis, an analysis of allometric relationships among characters, and a vector analysis were used to interpret morphological differences among females and male ...
DOI:
10.1093/aesa/91.3.335