Spatial network structure and metapopulation persistence
نویسندگان
چکیده
منابع مشابه
Spatial network structure and amphibian persistence in stochastic environments.
In the past few years, the framework of complex networks has provided new insight into the organization and function of biological systems. However, in spite of its potential, spatial ecology has not yet fully incorporated tools and concepts from network theory. In the present study, we identify a large spatial network of temporary ponds, which are used as breeding sites by several amphibian sp...
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This thesis uses spatially distributed models to test the Metapopulation Hypothesis, which asserts that migration between local populations promotes the persistence of a regional “metapopulation” despite short-term local fluctuations, or even temporary local extinctions, on the local scale. A review of relevant models finds that:1. These models found nothing to disagree with the hypothesis. Sub...
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Current research recognizes that both the spatial and temporal structure of the landscape influence species persistence. Patch models that incorporate the spatial structure of the landscape have been used to investigate static habitat destruction by comparing persistence results within nested landscapes. Other researchers have incorporated temporal structure into their models by making habitat ...
متن کاملMetapopulation Persistence in Random Fragmented Landscapes
Habitat destruction and land use change are making the world in which natural populations live increasingly fragmented, often leading to local extinctions. Although local populations might undergo extinction, a metapopulation may still be viable as long as patches of suitable habitat are connected by dispersal, so that empty patches can be recolonized. Thus far, metapopulations models have eith...
متن کاملEffects of colonization asymmetries on metapopulation persistence.
Ocean currents, prevailing winds, and the hierarchical structures of river networks are known to create asymmetries in re-colonization between habitat patches. The impacts of such asymmetries on metapopulation persistence are seldom considered, especially rarely in theoretical studies. Considering three classical models (the island, the stepping stone and the distance-dependent model), we explo...
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ژورنال
عنوان ژورنال: Journal of Theoretical Biology
سال: 2012
ISSN: 0022-5193
DOI: 10.1016/j.jtbi.2011.11.027