نتایج جستجو برای: ecological niche factor analysis

تعداد نتایج: 3564586  

2015
Miguel Fernández Healy Hamilton

Species distribution modeling is widely applied to predict invasive species distributions and species range shifts under climate change. Accurate predictions depend upon meeting the assumption that ecological niches are conserved, i.e., spatially or temporally transferable. Here we present a multi-taxon comparative analysis of niche conservatism using biological invasion events well documented ...

2016
Marta Kolanowska Katarzyna Mystkowska Marta Kras Magdalena Dudek Kamil Konowalik

The location of possible glacial refugia of six Apostasioideae representatives is estimated based on ecological niche modeling analysis. The distribution of their suitable niches during the last glacial maximum (LGM) is compared with their current potential and documented geographical ranges. The climatic factors limiting the studied species occurrences are evaluated and the niche overlap betwe...

2007
A. Jiménez-Valverde V. M. Ortuño J. M. Lobo

Methods Species presence data were collected from records in the literature and private and public collections. Ecological niche factor analysis was performed to extract pseudo-absences (probable absences), which, together with presence data, were modelled using generalized additive models. The models were run twice. Initially we used only environmental variables, and thereafter additional spat...

2008
Alexandre H. Hirzel Gwenaëlle Le Lay

1. The concept of the ecological niche relates a set of environmental variables to the fitness of species, while habitat suitability models (HSMs) relate environmental variables to the likelihood of occurrence of the species. In spite of this relationship, the concepts are weakly linked in the literature, and there is a strong need for better integration. 2. We selectively reviewed the literatu...

Journal: :journal of rangeland science 2013
lyla khalasi ahvazi mohammad ali zare chahouki faeze ghorbannezhad

eurotia ceratoides (l.) c. a. mey is an important plant species in semi-arid landsin iran. new approaches are required to determine the distribution of this plant species. forthis reason, geographical distributions of eurotia ceratoides were assessed using threedifferent models including: multiple discriminant analysis (mda), ecological niche factoranalysis (enfa) and logistic regression (lr). ...

Journal: :جنگل و فرآورده های چوب 0
سیدمعین الدین زمانی دانشجوی کارشناسی ارشد جنگل داری دانشگاه یاسوج، ‏یاسوج، ایران رقیه ذوالفقاری عضو هیئت علمی ‏‏دانشکدة کشاورزی و پژوهشکدة منابع طبیعی دانشگاه یاسوج، ‏یاسوج، ایران سهراب الوانی نژاد عضو هیئت علمی ‏‏دانشکدة کشاورزی و پژوهشکدة منابع طبیعی دانشگاه یاسوج، ‏یاسوج، ایران

today, determination of the ecological species groups for current and future situation of forest and its relationship with environmental factors is necessary for forest management. for this purpose, 50 plots were established in altitude range of 2091- 2811 meters above sea level and 600 hectare in protected area of western dena. four ecological groups was identified using twinspan analysis that...

2010
Jason K. BLACKBURN

This chapter provides an overview of geographic information systems, spatial analysis and spatial statistics, and predictive ecological niche modeling as they apply to disease ecology. I provide a conceptual model of the epidemiology and outbreak ecology of anthrax and the landscape ecology of the pathogen to these two components of the anthrax-transmission and spore-survival model. Spatial clu...

2011
Kevin E. Omland MICHAEL D. MARTIN KEVIN E. OMLAND

—Environmental niche parameters of breeding ranges for two subspecies in the Orchard Oriole complex (Icterus spurius spurius and I. s. fuertesi) were characterized via ecological niche modeling. Niche models formulated from museum specimen collections largely agree with published breeding ranges of both taxa. Furthermore, our findings identify likely suitable habitat of migratory double breedin...

Journal: :Molecular phylogenetics and evolution 2016
Daniel Spalink Bryan T Drew Matthew C Pace John G Zaborsky Pan Li Kenneth M Cameron Thomas J Givnish Kenneth J Sytsma

The role of geography and ecology in speciation are often discussed in the context of phylogenetic niche conservatism (PNC), the propensity of lineages to retain ancestral niche related traits. However, a recent paradigm shift focuses instead on measuring divergence of these traits in conjunction with patterns of speciation. Under this framework, we analyzed the diversification of North America...

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