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Influence of Landscape Elements in Riparian Buffers on the Conservation of Semiaquatic Amphibians
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Influence of Landscape Elements in Riparian Buffers on the Conservation of Semiaquatic Amphibians
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Journal Article
Influence of Landscape Elements in Riparian Buffers on the Conservation of Semiaquatic Amphibians
2009
Overview
Studies on riparian buffers have usually focused on the amount of land needed as habitat for the terrestrial life stages of semiaquatic species. Nevertheless, the landscape surrounding wetlands is also important for other key processes, such as dispersal and the dynamics of metapopulations. Multiple elements that influence these processes should therefore be considered in the delineation of buffers. We analyzed landscape elements (forest cover, density of roads, and hydrographic network) in concentric buffers to evaluate the scale at which they influence stream amphibians in 77 distinct landscapes. To evaluate whether our results could be generalized to other contexts, we determined whether they were consistent across the study areas. Amphibians required buffers of 100-400 m of suitable terrestrial habitat, but interspecific differences in the amount of habitat were large. The presence of amphibians was related to roads and the hydrographic network at larger spatial scales (300-1500 m), which suggests that wider buffers are needed with these elements. This pattern probably arose because these elements influence dispersal and metapopulation persistence, processes that occur at large spatial scales. Furthermore, in some cases, analyses performed on different sets of landscapes provided different results, which suggests caution should be used when conservation recommendations are applied to disparate areas. Establishment of riparian buffers should not be focused only on riparian habitat, but should take a landscape perspective because semiaquatic species use multiple elements for different functions. This approach can be complex because different landscape elements require different spatial extents. Nevertheless, a shift of attention toward the management of different elements at multiple spatial scales is necessary for the long-term persistence of populations.
Publisher
Blackwell Publishing Inc,Wiley-Blackwell,Blackwell Publishing Ltd
Subject
/ Animal, plant and microbial ecology
/ Animals
/ Biological and medical sciences
/ bosque
/ Buffers
/ caminos
/ Conservation of Natural Resources - methods
/ Conservation, protection and management of environment and wildlife
/ forest
/ forests
/ Fundamental and applied biological sciences. Psychology
/ Habitats
/ Italy
/ Parks, reserves, wildlife conservation. Endangered species: population survey and restocking
/ Pero
/ Rivers
/ Roads
/ Wetlands
