Functional Richness and Relative Resilience of Bird Communities in Regions with Different Land Use Intensities
Functional Richness and Relative Resilience of Bird Communities in Regions with Different Land Use Intensities
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DOI：
10.1007/s10021-007-9071-6
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发表时间：
2007-09-01
期刊：
影响因子：
3.7
通讯作者：
Stein, J. A.
中科院分区：
文献类型：
--
作者：
Fischer, J.;Lindenmayer, D. B.;Stein, J. A.
对不同管理制度下社区的功能和复原力的实证估计可以为可持续自然资源管理提供有价值的信息，但迄今为止这种估计很少。我们量化了澳大利亚东南部五个地区代表不同管理制度的鸟类群落的功能丰富度和相对恢复力。首先，我们表明，在所有地区物种贫乏的地区，功能丰富度和相对恢复力都降低了。其次，我们发现农业地区鸟类群落的体重群体和功能群体比偶然预期的要少。这表明农业地区鸟类群落的功能和恢复力都下降了。观察到的功能和相对恢复能力丧失的可能机制是：（1）景观纹理的简化导致某些体重群体的选择性灭绝； (2) 对土地集约利用特别敏感的某些功能群的选择性灭绝。
Empirical estimates of the function and resilience of communities under different management regimes can provide valuable information for sustainable natural resource management, but such estimates are scarce to date. We quantified the functional richness and relative resilience of bird communities inhabiting five regions in southeastern Australia that represented different management regimes. First, we show that functional richness and relative resilience were reduced at species-poor sites in all regions. Second, we show that bird communities in agricultural regions had fewer body mass groups and fewer functional groups than expected by chance. This suggests that both the function and the resilience of bird communities in agricultural regions were reduced. The likely mechanisms for the observed loss of function and relative resilience are: (1) the simplification of landscape texture resulting in selective extinction of certain body mass groups; and (2) the selective extinction of certain functional groups that are particularly sensitive to intensive land use.