نتایج جستجو برای: nature reserves

تعداد نتایج: 324438  

Journal: :E3S web of conferences 2023

Based on the analysis of expedition, stock, published and official cadastral materials specially protected natural areas, article characterizes complex (landscape) nature reserves Vologda region in context landscape concept formation network areas region, gives assessment compliance with biodiversity conservation tasks under taiga zone conditions. The history establishment reserves, species age...

Journal: :Ecological applications : a publication of the Ecological Society of America 2007
Andrés Viña Scott Bearer Xiaodong Chen Guangming He Marc Linderman Li An Hemin Zhang Zhiyun Ouyang Jianguo Liu

Global biodiversity loss is largely driven by human activities such as the conversion of natural to human-dominated landscapes. A popular approach to mitigating land cover change is the designation of protected areas (e.g., nature reserves). Nature reserves are traditionally perceived as strongholds of biodiversity conservation. However, many reserves are affected by land cover changes not only...

2007
Jai Ranganathan Kai M.A. Chan K. Ullas Karanth James L. David Smith

Despite being targeted as a conservation flagship species for several decades, the tiger (Panthera tigris) grows ever more imperiled. Debate exists as to where tiger conservation should focus: on protected nature reserves or larger landscapes. We developed a landscape scale, density-based model to assess whether reasonably effective management of current reserves is adequate to ensure the survi...

Journal: :Ecological applications : a publication of the Ecological Society of America 2007
Andrew J Hansen Ruth DeFries

Journal: :Proceedings. Biological sciences 2002
Miguel B Araújo Paul H Williams Robert J Fuller

Familiar quantitative reserve-selection techniques are tailored to simple decision problems, where the representation of species is sought at minimum cost. However, conservationists have begun to ask whether representing species in reserve networks is sufficient to avoid local extinctions within selected areas. An attractive, but previously untested idea is to model current species' probabiliti...

Journal: :The American naturalist 2005
Michael A McCarthy Colin J Thompson Hugh P Possingham

We examine the question of the optimal number of reserves that should be established to maximize the persistence of a species. We assume that the mean time to extinction of a single population increases as a power of the habitat area, that there is a certain amount of habitat to be reserved, and that the aim is to determine how this habitat is most efficiently divided. The optimal configuration...

Journal: :The American naturalist 2006
Michael A McCarthy Colin J Thompson Nicholas S G Williams

We examine the logic of designing nature reserves to understand better how to integrate the concepts of representativeness and persistence. Simple models of viability are used to evaluate how the expected number of species in the reserve system changes with variation in the risk of extinction among species, their rate of occurrence, and the distribution of species. The optimal size of individua...

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