Results 11 to 20 of about 14,888 (262)

Accommodating heteroscedasticity in allometric biomass models [PDF]

Forest Ecology and Management, 2022
Abstract Allometric models are commonly used to predict forest biomass. These models typically take nonlinear power-law forms that predict individual tree aboveground biomass (AGB) as functions of diameter at breast height (D) and/or tree height (H). Because the residual variance is in most cases heteroscedastic, accommodating the heteroscedasticity (
Erik Næsset, Ioan Dutcă, Viorel Blujdea   +2 more
exaly   +2 more sources

ATNr: Allometric Trophic Network models in R

Methods in Ecology and Evolution, 2023
Understanding and predicting how densities of interacting species change over time has been one of the main goals of community ecology, which has become a pressing challenge in the context of global change.
Benoit Gauzens, Ulrich Brose, Eva Delmas, Emilio Berti   +3 more
doaj   +2 more sources

An allometric model for trees [PDF]

Journal of Theoretical Biology, 2004
This paper presents a general mathematical model for the morphometric description of trees. This model is based on the introduction of fractal theory, and more particularly of the concept of self-similarity, into a statistical physics rationale. Fractal theory provides the necessary tools to describe the complexity of tree structure.
Fleurant, Cyril, Duchesne, Jean, Raimbault, Pierre   +2 more
openaire   +5 more sources

The allometric model in chronic myocardial infarction [PDF]

Theoretical Biology and Medical Modelling, 2012
Une relation allométrique entre différents paramètres d'électrocardiogramme (ECG) et la masse ventriculaire infarctus a été évaluée dans un modèle d'infarctus du myocarde (IM) chez des lapins néo-zélandais. Au total, quinze animaux ont été utilisés, dont dix ont subi une ligature de l'artère coronaire descendante antérieure gauche pour induire un ...
María Paula Bonomini, Pedro David Arini, Germán E. Gónzalez, Bruno Buchholz, Max E. Valentinuzzi   +4 more
openaire   +2 more sources

Global patterns of allometric model parameters prediction

Scientific Reports, 2023
AbstractVariations in biomass-carbon of forest can substantially impact the prediction of global carbon dynamics. The allometric models currently used to estimate forest biomass face limitations, as model parameters can only be used for the specific species of confirmed sites. Here, we collected allometric models LnW = a + b*Ln(D) (n = 817) and LnW = a 
Zixuan Wang, Xingzhao Huang, Fangbing Li, Dongsheng Chen, Xiaoniu Xu   +4 more
openaire   +3 more sources

An allometric model for mapping seed development in plants [PDF]

Briefings in Bioinformatics, 2013
Despite a tremendous effort to map quantitative trait loci (QTLs) responsible for agriculturally and biologically important traits in plants, our understanding of how a QTL governs the developmental process of plant seeds remains elusive. In this article, we address this issue by describing a model for functional mapping of seed development through the
Zhongwen Huang, Chunfa Tong, Wenhao Bo, Xiaoming Pang, Zhong Wang 0001, Jichen Xu, Junyi Gai, Rongling Wu   +7 more
openaire   +3 more sources

PARAMETER ESTIMATION FOR AN ALLOMETRIC FOOD WEB MODEL [PDF]

International Journal of Pure and Apllied Mathematics, 2017
The application of mechanistic models to natural systems is of interest to ecological researchers.
Banks, H. T., Banks, J. E., Bommarco, Riccardo, Curtsdotter, Alva, Jonsson, Tomas, Laubmeier, A. N.   +5 more
openaire   +2 more sources

Biomass estimation in mangrove forests: a comparison of allometric models incorporating species and structural information

Environmental Research Letters, 2021
Improved estimates of aboveground biomass (AGB) are required to improve our understanding of the productivity of mangrove forests to support the long-term conservation of these fragile ecosystems which are under threat from many natural and anthropogenic
Md Saidur Rahman, Daniel N M Donoghue, Louise J Bracken, Hossain Mahmood   +3 more
doaj   +1 more source

Aboveground biomass estimation at different scales for subtropical forests in China

Botanical Studies, 2017
Background The accurate estimation of forest biomass at different scales is the critical step in the assessment of forest carbon stocks. We used three models at increasing scales: allometric model at ecoregional scale (model 1), dummy variable allometric
Shunlei Peng, Nianpeng He, Guirui Yu, Qiufeng Wang   +3 more
doaj   +1 more source

Common Allometric Aboveground Biomass Models for Two Atlantic Forest Tree Ferns [PDF]

Floresta e Ambiente
Available species-specific allometric aboveground biomass (AGB) models for tree ferns occurring in the Atlantic forest are based on small calibration datasets, potentially leading to increased uncertainty in model parameter estimates.
Laio Zimermann Oliveira, Alexander Christian Vibrans   +1 more
doaj   +2 more sources