By Jianguo Liu, Vanessa Hull, Anita T. Morzillo, John A. Wiens
Source-sink theories offer an easy but strong framework for figuring out how the styles, strategies and dynamics of ecological structures range and engage over house and time. Integrating a number of learn fields, together with inhabitants biology and panorama ecology, this publication offers the most recent advances in source-sink theories, tools and purposes within the conservation and administration of usual assets and biodiversity. The interdisciplinary crew of authors makes use of distinct case stories, leading edge box experiments and modeling, and complete syntheses to include source-sink rules into study and administration, and explores how sustainability may be completed in state-of-the-art more and more fragile human-dominated ecosystems. delivering a complete photograph of source-sink learn in addition to tangible functions to actual international conservation concerns, this booklet is perfect for graduate scholars, researchers, natural-resource managers and coverage makers.
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Extra info for Sources, Sinks and Sustainability
Example text
Population maintained by immigration; the landward side of the dune, by contrast, is a “harsh” sink, with few individuals present. 4. When considering two habitats coupled by dispersal, if at demographic equilibrium there is asymmetry in the flows of individuals between them, a source–sink population structure will emerge (Pulliam 1988). Passive dispersal in a heterogeneous landscape is a potent mechanism for generating sink populations (Holt 1985). Sea rocket seeds passively waft on the wind. Given the persistent directionality of wind from the ocean, this physical transport process across the dunes is strongly asymmetric, and maintains sink populations.
Hopkins and V. R. Coffman (2001). Failed recruitment of southern toads (Bufo terrestris) in a trace element-contaminated breeding habitat:€direct and indirect effects Impact of a classic paper by H. Ronald Pulliam:€the first 20 years that may lead to a local population sink. Archives of Environmental Contamination and Toxicology 40(3):€399–405. Runge, J. , M. C. Runge and J. D. Nichols (2006). The role of local populations within a landscape context:€defining and classifying sources and sinks.
But they also point toward the next-generation development of a “meta” source–sink theory that integrates these ideas into a more unified and cohesive body of theory. 21 robert d. holt 2 Evolution in source–sink environments:€implications for niche conservatism Summary Demographic sources and sinks arise from the interplay of spatial variations in birth and death rates, and movement between habitats. One way to view sources and sinks is that, in the former, individuals are well adapted to the local environment, whereas in the latter, individuals are poorly adapted.