نتایج جستجو برای: ecological niche modeling

تعداد نتایج: 503197  

Journal: :Trends in genetics : TIG 2009
Samuel Venner Cédric Feschotte Christian Biémont

Like ecological communities, which vary in species composition, eukaryote genomes differ in the amount and diversity of transposable elements (TEs) that they harbor. Given that TEs have a considerable impact on the biology of their host species, we need to better understand whether their dynamics reflects some form of organization or is primarily driven by stochastic processes. Here, we borrow ...

2015
John M Drake

The ecological niche is the set of environments in which a population of a species can persist without introduction of individuals from other locations. A good mathematical or computational representation of the niche is a prerequisite to addressing many questions in ecology, biogeography, evolutionary biology and conservation. A particularly challenging question for ecological niche modelling ...

2013
John Odling-Smee Douglas H. Erwin Eric P. Palkovacs Marcus W. Feldman Kevin N. Laland

Niche construction theory (NCT) explicitly recognizes environmental modification by organisms (“niche construction”) and their legacy over time (“ecological inheritance”) to be evolutionary processes in their own right. Here we illustrate how niche construction theory provides useful conceptual tools and theoretical insights for integrating ecosystem ecology and evolutionary theory. We begin by...

2017
Rocío Tarjuelo Manuel B Morales Beatriz Arroyo Santiago Mañosa Gerard Bota Fabián Casas Juan Traba

Interspecific competition is a dominant force in animal communities that induces niche shifts in ecological and evolutionary time. If competition occurs, niche expansion can be expected when the competitor disappears because resources previously inaccessible due to competitive constraints can then be exploited (i.e., ecological release). Here, we aimed to determine the potential effects of inte...

ژورنال: The Iranian Journal of Botany 2019

امروزه تغییرات اقلیم در سطح جهان چالشی بزرگ برای تنوع زیستی است. داشتن اطلاعات از داده­های مکانی گونه به مراتب برای نشان دادن تنوع زیستی و حفاظت مؤثر است. پیشرفت­های اخیر در شبیه‌سازی مدل­های رایانه‌ای فرصت مناسبی را برای محققین علوم گیاهی در تلفیق داده­های هرباریومی با اطلاعات تکاملی و اکولوژیکی گونه که برای حفظ تنوع زیستی نیز با اهمیت است فراهم آورده است. گونه Salvia aristata Auch. ex Benth (...

Journal: :جنگل و فرآورده های چوب 0
حسین پیری صحراگرد دانشگاه زابل محمدعلی زارع چاهوکی دانشکده منابع طبیعی دانشگاه تهران مجید آجورلو دانشگاه زابل محمد نهتانی دانشگاه زابل

this study aims at comparing the performance of logistic regression, maximum entropy, and multilayer perceptron techniques in preparing the predictive habitat distribution map of amygdalus scoparia in rangelands of qom province. for this purpose, vegetation sampling was done using random systematic methods after identifying pure habitats of this species. for soil sampling, eight profiles were e...

2018
Hernán Alvarado-Sizzo Alejandro Casas Fabiola Parra Hilda Julieta Arreola-Nava Teresa Terrazas Cristian Sánchez

The Stenocereus griseus species complex (SGSC) has long been considered taxonomically challenging because the number of taxa belonging to the complex and their geographical boundaries remain poorly understood. Bayesian clustering and genetic distance-based methods were used based on nine microsatellite loci in 377 individuals of three main putative species of the complex. The resulting genetic ...

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