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Influence of land-use/land-cover change on landscape connectivity for an endemic threatened amphibian (Argenteohyla siemersi pederseni, Anura: Hylidae)
Landscape Ecology ( IF 4.0 ) Pub Date : 2020-05-22 , DOI: 10.1007/s10980-020-01031-7
Facundo Schivo , María Cruz Mateo-Sánchez , Valeria Bauni , Rubén Darío Quintana

Modifications in natural landcover generally result in a loss of habitat availability for wildlife and it’s persistence will depend largely on their spatial configuration and functional connections. Argenteohyla siemersi is a threatened and endemic amphibian whose habitat is composed of forest patches near rivers and water bodies edges. This study aimed to analyse the accessible habitat for this species and identify key elements to maintain its ecological network in two different types of land uses: an anthropized area with extensive cattle raising and a protected area. The structural and functional characteristics of both landscapes were analyzed. The connectivity at landscape level and the contribution of each habitat patch were evaluated through simulation models with different dispersion distances in the context of the graph theory. In both landscapes, nine types of landcover were identified with different compositions. Remarkable differences were found in habitat connectivity for this amphibian species between both landscapes. As the percentage of dispersion distance increases, reachable habitat increases as well, although with higher percentages in the protected area. Two corridors were identified in the protected landscape and one in the rangeland one; patches and key links constituted all of them. The present work provides spatially explicit results with a quantitative basis. It could be useful as a tool for the development of management plans aimed at guaranteeing the functionality of the ecological network for this endangered species and, therefore, contribute to its long-term conservation.

中文翻译:

土地利用/土地覆盖变化对地方性受威胁两栖动物(Argenteohyla siemersi pederseni,Anura:Hylidae)景观连通性的影响

自然土地覆盖的改变通常会导致野生动物栖息地的丧失,其持续性将在很大程度上取决于它们的空间配置和功能连接。Argenteohyla siemersi 是一种受威胁的地方性两栖动物,其栖息地由河流和水体边缘附近的森林斑块组成。本研究旨在分析该物种可进入的栖息地,并确定在两种不同类型的土地利用中维持其生态网络的关键要素:广泛饲养牛的人类化地区和保护区。分析了两种景观的结构和功能特征。在图论的背景下,通过具有不同分散距离的模拟模型来评估景观层面的连通性和每个栖息地斑块的贡献。在这两个景观中,九种类型的土地覆盖被确定为具有不同的成分。在两种景观之间,这种两栖动物物种的栖息地连通性存在显着差异。随着分散距离百分比的增加,可到达的栖息地也会增加,尽管保护区的百分比更高。在受保护的景观中确定了两条走廊,一条在牧场上;补丁和关键链接构成了所有这些。目前的工作提供了具有定量基础的空间明确结果。它可以用作制定管理计划的工具,旨在保证这种濒危物种生态网络的功能,从而有助于其长期保护。在两种景观之间,这种两栖动物物种的栖息地连通性存在显着差异。随着分散距离百分比的增加,可到达的栖息地也会增加,尽管保护区的百分比更高。在受保护的景观中确定了两条走廊,一条在牧场上;补丁和关键链接构成了所有这些。目前的工作提供了具有定量基础的空间明确结果。它可以用作制定管理计划的工具,旨在保证这种濒危物种生态网络的功能,从而有助于其长期保护。在两种景观之间,这种两栖动物物种的栖息地连通性存在显着差异。随着分散距离百分比的增加,可到达的栖息地也会增加,尽管保护区的百分比更高。在受保护的景观中确定了两条走廊,一条在牧场上;补丁和关键链接构成了所有这些。目前的工作提供了具有定量基础的空间明确结果。它可以用作制定管理计划的工具,旨在保证这种濒危物种生态网络的功能,从而有助于其长期保护。可到达的栖息地也增加了,尽管保护区的百分比更高。在受保护的景观中确定了两条走廊,一条在牧场上;补丁和关键链接构成了所有这些。目前的工作提供了具有定量基础的空间明确结果。它可以用作制定管理计划的工具,旨在保证这种濒危物种生态网络的功能,从而有助于其长期保护。可到达的栖息地也增加了,尽管保护区的百分比更高。在受保护的景观中确定了两条走廊,一条在牧场上;补丁和关键链接构成了所有这些。目前的工作提供了具有定量基础的空间明确结果。它可以用作制定管理计划的工具,旨在保证这种濒危物种生态网络的功能,从而有助于其长期保护。
更新日期:2020-05-22
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