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不同生境类型鸟类群落物种及功能多样性分析以桐庐、萧山两县(区)为例

Analysis of Avian Community Species and Functional Diversity in Different Habitat Types: A Case Study of Tonglu County and Xiaoshan District

  • 摘要: 本研究以杭州市“三江两岸”区域的桐庐县和萧山区作为研究区域,分析8种生境类型中鸟类群落的αβ多样性和功能多样性。结果表明,桐庐县鸟类物种多样性(166种)及功能多样性整体均高于萧山区(127种)。其中,两县(区)灌草丛的物种多样性最高(Shannon-Wiener指数:桐庐3.52,萧山2.95),农田的功能多样性最高,而溪流库塘功能冗余度最低(Rao二次熵指数0.44)。β多样性分析表明,竹林和阔叶林的群落差异主要由嵌套效应驱动,而溪流库塘和农田则受物种周转主导。桐庐的竹林和阔叶林保护优先级高于萧山,而两地溪流库塘及农田生境均需重点保护。鸟类分布格局与生境过渡带的边缘效应及环境过滤密切相关。本研究为区域鸟类多样性保护及栖息地管理提供了科学依据。

     

    Abstract: Tonglu County and Xiaoshan District located in the “Three Rivers and Two Banks” area of Hangzhou were selected as the study regions for the analysis of alpha and beta diversity and functional diversity of avian communities across eight habitat types. The results showed that the species diversity (166 species) and functional diversity in Tonglu County were higher than those in Xiaoshan District (127 species). Shrub-grass lands possessed the highest species diversity with Shannon-Wiener index 3.52 in Tonglu, 2.95 in Xiaoshan, while the highest functional diversity occurred in farmlands, and the lowest functional redundancy existed in stream-pond habitats with Rao’s quadratic entropy index of 0.44. Beta diversity analysis indicated that community differences between bamboo forests and broad-leaved forests were primarily driven by nestedness, whereas those in stream-pond and farmland habitats were dominated by species turnover. The conservation priority of bamboo forests and broad-leaved forests in Tonglu was higher than that in Xiaoshan, whereas stream-pond and farmland habitats in both regions required to be protected intensively. The distribution pattern of birds was closely related to edge effects in habitat transition zones and environmental filtering. This study provides a scientific basis for regional avian diversity conservation and habitat management.

     

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