نتایج جستجو برای: based niche modelling for mapping spcies habitat ecology 87

تعداد نتایج: 11323125  

2006
Volker Bahn Raymond J. O’Connor William B. Krohn

Range edges are of particular interest to ecology because they hold key insights into the limits of the realized niche and associated population dynamics. A recent feature of Oikos summarized the state of the art on range edge ecology. While the typical question is what causes range edges, another important question is how range edges influence the distribution of abundances across a species ge...

Wildlife is an important biological indicator of viability of ecosystems, therefore, understanding habitat requirements of species is essential for biodiversity conservation. Determining the suitability of habitats for wildlife is important for effective management and conservation of species. The brown bear (Ursus arctos), as the largest carnivorous mammal in Iran, is distributed in most fores...

2018
Kristin M Winchell Elizabeth J Carlen Alberto R Puente-Rolón Liam J Revell

Faunal responses to anthropogenic habitat modification represent an important aspect of global change. In Puerto Rico, two species of arboreal lizard, Anolis cristatellus and A. stratulus, are commonly encountered in urban areas, yet seem to use the urban habitat in different ways. In this study, we quantified differences in habitat use between these two species in an urban setting. For each sp...

2007
A. Reggiani Peter Nijkamp

Recently increasing interest in non-linear dynamic phenomena has emerged in economics and regional science, such as resilience of systems to sudden changes, adjustment processes, uncertainty and perturbations at both micro and macro levels. In the context of spatial modelling this has also provoked an increasing use of (continuous and discrete) dynamic models derived from ecology (such as May's...

Journal: :Ecology letters 2010
John J Wiens David D Ackerly Andrew P Allen Brian L Anacker Lauren B Buckley Howard V Cornell Ellen I Damschen T Jonathan Davies John-Arvid Grytnes Susan P Harrison Bradford A Hawkins Robert D Holt Christy M McCain Patrick R Stephens

The diversity of life is ultimately generated by evolution, and much attention has focused on the rapid evolution of ecological traits. Yet, the tendency for many ecological traits to instead remain similar over time [niche conservatism (NC)] has many consequences for the fundamental patterns and processes studied in ecology and conservation biology. Here, we describe the mounting evidence for ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

in this thesis protic and aprotic ammonium-based ionic liquids were synthesized and their surface tensions were measured in the range of 298-373k. the protics are alkyl ammonium-based ils with the carboxylate (formate, acetate, propionate) anion and aprotics are quaternary ammonium-based ils with bis(trifluoromethylsulfonyl)imide anion. capillary rise method was used for surface tension measure...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مدیریت و حسابداری 1391

the application of e-learning systems - as one of the solutions to the issue of anywhere and anytime learning – is increasingly spreading in the area of education. content management - one of the most important parts of any e-learning system- is in the concern of tutors and teachers through which they can obtain means and paths to achieve the goals of the course and learning objectives. e-learn...

2010
Gary E. Belovsky

Optimal foraging theory is useful to wildlife managers, because it helps explain the nutritional value of different habitats for wildlife species. Based upon nutritional value, the use of different habitats can be predicted, including how factors such as insect harassment, predation and migration might modify habitat selection. If habitat value and use can be understood, then changes in habitat...

Journal: :Journal of Agrometeorology 2022

The potential distribution of invasive rugose spiralling whitefly, Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae) was predicted under present (2020) and future climate change emission scenarios in 2050 2070 four representative concentration pathways (RCP 2.6, RCP 4.5, 6.0, 8.5) using maximum entropy (MaxEnt) niche modelling. model performance assessed area the curve receiver operat...

2011
Morgane Barbet-Massin Frédéric Jiguet

The Corsican Nuthatch (Sitta whiteheadi) is red-listed as vulnerable to extinction by the IUCN because of its endemism, reduced population size, and recent decline. A further cause is the fragmentation and loss of its spatially-restricted favourite habitat, the Corsican pine (Pinus nigra laricio) forest. In this study, we aimed at estimating the potential impact of climate change on the distrib...

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