The effects of predatory fish on amphibian species richness and distribution
The effects of predatory fish on amphibian species richness and distribution
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DOI：
10.1016/s0006-3207(96)00113-9
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发表时间：
1997-02-01
影响因子：
5.9
通讯作者：
MCloskey, RT
中科院分区：
文献类型：
--
作者：
Hecnar, SJ;MCloskey, RT
两栖类社区在178池塘横跨加拿大安大略西南部，进行了研究，以确定是否存在的掠食性鱼类有关改变两栖类物种丰富度或分布在地理尺度上。池塘是研究区域重要的两栖动物栖息地，许多池塘都放养了鱼类。调查进行了三年以上，用于构建两栖动物物种列表的个别池塘。物种丰富度和存在/不存在进行了比较池塘分类的鱼类存在的类型。两栖动物物种丰富度显着低于在池塘捕食性鱼类的存在比在非捕食性，或无鱼，池塘。并不是所有的两栖动物物种都受到食肉鱼类的负面影响。那些无论是大机构或离合器大小共同发生的掠食性鱼类比那些小机构或离合器大小。人类引入掠食性鱼类可能导致两栖动物物种组合的改变，并减少了地理尺度上的群落多样性。版权所有（C）1996爱思唯尔科学有限公司
Amphibian communities at 178 ponds across southwestern Ontario, Canada, were studied to determine if presence of predatory fish was related to altered amphibian species richness or distribution on a geographic scale. Ponds are an important amphibian habitat in the study area and many have been stocked with fish. Surveys conducted over three years were used to construct amphibian species lists for individual ponds. Species richness and presence/absence were compared among ponds classified by the type of fish present. Amphibian species richness was significantly lower at ponds having predatory fish present than at non-predatory, or fish-free, ponds. Not all amphibian species were negatively affected by the presence of predatory fish. those having either large bodies or clutch size co-occurred with predatory fish more frequently than those with small bodies or clutch size. Introduction of predatory fish by humans has likely resulted in altered amphibian species assemblages and reduced community diversity on a geographic scale. Copyright (C) 1996 Elsevier Science Limited