An index of functional diversity
An index of functional diversity
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DOI：
10.1111/j.1654-1103.2003.tb02184.x
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发表时间：
2003-08-01
影响因子：
2.8
通讯作者：
Wilson, JB
中科院分区：
文献类型：
--
作者：
Mason, NWH;MacGillivray, K;Wilson, JB
功能多样性一直被视为预测稳定性的关键。入侵、资源获取、养分循环和群落生产力。然而，目前还不清楚如何估计这一数字。提出了功能多样性指数的十个标准。其中包括，它应该反映存在的特征的范围和具有这些特征的物种的丰富度，并且不受所使用的测量单位或物种数量的影响。它以性状的变异为基础，以具有这些性状的物种的丰富度为权重。用人工和随机生成的数据进行测试，它显示出对0-1范围(平均值0.6，范围0.0009-0.975)的合理使用和直观的行为。使用新西兰八个地点的现场数据进行了测试。它给出了一个很好的数值分布(平均0.65，范围在0.34-0.84之间)。表现出很好的区分群落的能力，其表现在生态上是直观的。通过生物测定确定了年平均温度和土壤肥力之间的相关关系。建议在一般情况下使用FDvar。
Functional diversity has been seen as the key to predicting the stability. invasibility, resource capture, nutrient cycling and productivity of communities. However, it has been unclear how to estimate it. Ten criteria for an index of functional diversity are developed. These include that it should reflect the range of characters present and the abundance of the species with those characters in the community, and be unaffected by the measurement units used or by the number of species.An index that meets all ten criteria, FDvar, is investigated. It is based on the variance in characters, weighted by the abundance of the species with those characters. Tested with artificial and randomly generated data, it showed reasonable use of the 0 - 1 range (mean 0.60, range 0.0009 - 0.975) and intuitive behaviour. Tested with field data from eight sites in New Zealand. it gave a good spread of values (mean 0.65, range across sites 0.34 - 0.84). showed good ability to distinguish between the communities and its performance was ecologically intuitive. Illustrative correlations are made with mean annual temperature and soil fertility, determined by a bio-assay. FDvar is recommended for general use.