Effects of landscape heterogeneity and breeding habitat diversity on rice frog abundance and body condition in agricultural landscapes of Yangtze River Delta, China.
Effects of landscape heterogeneity and breeding habitat diversity on rice frog abundance and body condition in agricultural landscapes of Yangtze River Delta, China.
复制标题
长三角农业景观景观异质性和繁殖生境多样性对稻蛙丰度和身体状况的影响
DOI：
10.1093/cz/zoaa025
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发表时间：
2020-12
期刊：
影响因子：
2.2
通讯作者：
Wang T
中科院分区：
文献类型：
--
作者：
Li B;Zhang W;Wang Z;Xie H;Yuan X;Pei E;Wang T
摘要两栖动物在构建农业景观的生物组合中起着关键作用，但它们正受到全球农业集约化的威胁。景观结构是影响农业景观生物多样性的重要变量。然而，在长江三角洲，“农田-果园-鱼塘”农业模式是常见的，景观建设对无尾两栖动物种群的影响还不清楚。研究了农田景观参数对中国农田优势无尾两栖类稻蛙（Fejervarya multistriata）丰度和体况的影响。采用视觉相遇法，对20个农业景观中的稻蛙丰度进行了连续3年的调查。我们还计算了这些农业景观的188只雄性青蛙个体的身体状况指数（BCI）。景观变量，包括景观组成的异质性（使用香农多样性指数的所有土地覆盖类型，除建筑物和道路），景观结构的异质性（使用景观边缘密度），繁殖栖息地的多样性（使用5个水体类型的数量作为繁殖栖息地），和森林面积也测量了每1公里半径的景观。研究发现，各农业景观中的森林数量与稻蛙丰度呈显著正相关，繁殖生境多样性与雄性稻蛙的BCI呈正相关。然而，身体状况的负面影响，景观结构异质性。我们的研究结果表明，非农业生境的农业景观，如水体和森林，有利于米蛙种群持续的重要性。
Abstract Amphibians play a key role in structuring biological assemblages of agricultural landscapes, but they are threatened by global agricultural intensification. Landscape structure is an important variable influencing biodiversity in agricultural landscapes. However, in the Yangtze River Delta, where a "farmland-orchard-fishpond" agricultural pattern is common, the effects of landscape construction on anuran populations are unclear. In this study, we examined the effects of agricultural landscape parameters on the abundance and body condition of the rice frog (Fejervarya multistriata), which is a dominant anuran species in farmland in China. Employing a visual encounter method, we surveyed rice frog abundance for 3 years across 20 agricultural landscapes. We also calculated the body condition index (BCI) of 188 male frog individuals from these agricultural landscapes. Landscape variables, comprising landscape compositional heterogeneity (using the Shannon diversity index of all land cover types except buildings and roads), landscape configurational heterogeneity (using landscape edge density), breeding habitat diversity (using the number of 5 waterbody types available as breeding habitats), and areas of forest were also measured for each 1-km radius landscape. We found that the amount of forest in each agricultural landscape had a significant positive relationship with rice frog abundance, and breeding habitat diversity was positively related to the BCI of male rice frogs. However, body condition was negatively impacted by landscape configurational heterogeneity. Our results suggested the importance of nonagricultural habitats in agricultural landscapes, such as waterbodies and forest, to benefit rice frog population persistence.
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