Breeding Habitat and Landscape Correlates of Frog Diversity and Abundance in a Tropical Agricultural Landscape
Breeding Habitat and Landscape Correlates of Frog Diversity and Abundance in a Tropical Agricultural Landscape
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DOI：
10.1007/s13157-011-0217-0
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发表时间：
2011-12-01
期刊：
影响因子：
2
通讯作者：
Rossa-Feres, Denise de Cerqueira
中科院分区：
文献类型：
--
作者：
da Silva, Fernando Rodrigues;Gibbs, James P.;Rossa-Feres, Denise de Cerqueira
人们对热带生态系统临时池的生物多样性价值知之甚少。这些湿地往往受到农业的威胁。人工水池提供了一种减轻天然水池损失的手段，但与成功恢复相关的设计特征尚不清楚。在本文中，我们评估了在当地（繁殖池）和区域空间尺度（景观配置）的环境变量对物种丰富度和丰富度的无尾两栖动物在巴西东南部的严重改变景观的影响。从2008年10月至2009年3月，每2周对18个临时养殖池的青蛙和蟾蜍群落进行采样。两个变量-水文周期和植被的百分比在内部的游泳池解释了62%的物种丰富度的变化。其他三个变量池面积，池的距离森林片段，和池的距离道路解释之间的22%和46%的青蛙和蟾蜍丰度的变化。我们的研究结果表明，当地和区域尺度的变量，以及它们之间的相互作用，是重要的驱动程序的青蛙和蟾蜍社区的结构，在这些农业景观。为了促进两栖动物的保护，我们建议牛牧场主创建和维护高度植被保护森林保护区附近的临时池作为牲畜的水源和两栖动物的繁殖栖息地。
The biodiversity values of temporary pools in tropical ecosystems are poorly understood. Such wetlands are often threatened by agriculture. Constructed pools provide a means to mitigate for loss of natural pools but design features associated with restoration successful are not known. In this paper, we evaluated the effects of environmental variables at local (breeding pools) and regional spatial scales (landscape configuration) on species richness and abundance of anurans in heavily altered landscapes of southeastern Brazil. Frog and toad communities of 18 constructed temporary breeding pools were sampled every 2 weeks from October 2008 to March 2009. Two variables-hydroperiod and percentage of vegetation in the interior of the pools-explained 62% of species richness variation. Three other variables-pool area, distance of pools to forest fragments, and distance of pools to road-explained between 22 and 46% of the variation in frog and toad abundance. Our results indicate that local- and regional-scale variables, and their interaction, are important drivers of the structure of frog and toad communities in these agricultural landscapes. To facilitate amphibian conservation we suggest that cattle ranchers create and maintain heavily vegetated temporary pools near protected forest reserves as both a water source for livestock and breeding habitat for amphibians.