نتایج جستجو برای: 2011 predicting potential european bison habitat across its former range ecological application 21

تعداد نتایج: 4624126  

2016
Nima Madani John S. Kimball Mona Nazeri Lalit Kumar David L. R. Affleck Quazi K. Hassan

Species distribution modeling has been widely used in studying habitat relationships and for conservation purposes. However, neglecting ecological knowledge about species, e.g. their seasonal movements, and ignoring the proper environmental factors that can explain key elements for species survival (shelter, food and water) increase model uncertainty. This study exemplifies how these ecological...

Journal: :international journal of environmental research 2012
s. rasouli m. makhdoum farkhondeh h.r. jafari r. suffling b. kiabi

identification of rapid degradation of ecological resources requires effective environmental monitoring including ecological integrity assessment .our first aim is to analyze ecological integrity in a landscape context while developing a method to assess integrity in spite of a dearth of historical data. we used a spatial-temporal reference framework for land cover maps for assessing ecologica...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2007
Rurik List Gerardo Ceballos Charles Curtin Peter J P Gogan Jesús Pacheco Joe Truett

Ecologists and conservationists have long assumed that large grazers, including bison (Bison bison), did not occur in post-Pleistocene southwestern North America. This perception has been influential in framing the debate over conservation and land use in the northern Chihuahuan Desert. The lack of an evolutionary history of large grazers is being used to challenge the validity of ranching as a...

Journal: :Journal of environmental management 2009
Thomas K Alexandridis Efthalia Lazaridou Anastasia Tsirika George C Zalidis

The European Habitats Directive 92/43/EEC has defined the need for the conservation of habitats and species with the adoption of appropriate measures. Within the Natura 2000 ecological network of special areas of conservation, natural habitats will be monitored to ensure the maintenance or restoration of their composition, structure and extent. The European Space Agency's GlobWetland project ha...

2017
Edward J Raynor Hawthorne L Beyer John M Briggs Anthony Joern

Understanding behavioral strategies employed by animals to maximize fitness in the face of environmental heterogeneity, variability, and uncertainty is a central aim of animal ecology. Flexibility in behavior may be key to how animals respond to climate and environmental change. Using a mechanistic modeling framework for simultaneously quantifying the effects of habitat preference and intrinsic...

2012
Huijie Qiao Congtian Lin Liqiang Ji Zhigang Jiang

BACKGROUND Predicting the ecological niche and potential habitat distribution of a given organism is one of the central domains of ecological and biogeographical research. A wide variety of modeling techniques have been developed for this purpose. In order to implement these models, the users must prepare a specific runtime environment for each model, learn how to use multiple model platforms, ...

2005
T. Edwin Chow Karen F. Gaines Michael E. Hodgson Machelle D. Wilson

Contamination has a dramatic impact on the health of ecosystem and habitat suitability for the inhabited flora and fauna. The Environmental Protection Agency (EPA) mandates an ecological risk assessment (ERA) that evaluates the potential adverse impact of any anthropogenic activities on the ecosystem (US Environmental Protection Agency, 1997. Ecological Risk Assessment Guidance for Superfund: P...

2014
Junhua Hu Yang Liu

It remains a challenge to identify the geographical patterns and underlying environmental associations of species with unique ecological niches and distinct behaviors. This in turn hinders our understanding of the ecology as well as effective conservation management of threatened species. The white-eared night heron (Gorsachius magnificus) is a non-migratory nocturnal bird species that has a pa...

2015
Leah H. Yandow Anna D. Chalfoun Daniel F. Doak Christopher A. Lepczyk

Some of the most compelling examples of ecological responses to climate change are elevational range shifts of individual species, which have been observed throughout the world. A growing body of evidence, however, suggests substantial mediation of simple range shifts due to climate change by other limiting factors. Understanding limiting factors for a species within different contexts, therefo...

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