Diversity of response and effect traits provides complementary information about avian community dynamics linked to ecological function
Diversity of response and effect traits provides complementary information about avian community dynamics linked to ecological function
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DOI：
10.1111/1365-2435.13865
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发表时间：
2021-06-30
影响因子：
5.2
通讯作者：
Oliver, Thomas H.
中科院分区：
文献类型：
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作者：
Hordley, Lisbeth A.;Gillings, Simon;Oliver, Thomas H.
1.基于物种特征的功能多样性度量被广泛用于研究生态系统的功能。从理论上讲，这些指标具有不同的含义，这取决于它们是从调节对环境变化的反应的特征(反应特征)还是那些调节功能的特征(影响特征)计算出来的，然而，多样性指标中的特征选择很少被仔细审查。在这里，我们汇编了英国鸟类提供两种关键生态服务-种子传播和昆虫捕食-的影响和响应特征，以评估功能多样性与群落丰度随时间的平均值和稳定性之间的关系。正如预测的那样，当使用反应特性计算时，功能多样性与种子传播者群落丰度的稳定性相关。然而，我们发现，当使用效应性状计算时，种子传播器的功能多样性与平均群落丰度之间存在负相关。随后，当将所有性状组合在一起时，我们发现了与功能多样性不一致的结果，这些结果与食虫动物的稳定性降低有关，但与种子分散体的稳定性更高相关。我们的研究结果表明，在生态系统管理中应用这些指标时，应更仔细地考虑性状选择。
1. Functional diversity metrics based on species traits are widely used to investigate ecosystem functioning. In theory, such metrics have different implications depending on whether they are calculated from traits mediating responses to environmental change (response traits) or those regulating function (effect traits), yet trait choice in diversity metrics is rarely scrutinized.2. Here, we compile effect and response traits for British bird species supplying two key ecological services-seed dispersal and insect predation-to assess the relationship between functional diversity and both mean and stability of community abundance over time.3. As predicted, functional diversity correlates with stability in community abundance of seed dispersers when calculated using response traits. However, we found a negative relationship between functional diversity and mean community abundance of seed dispersers when calculated using effect traits. Subsequently, when combining all traits together, we found inconsistent results with functional diversity correlating with reduced stability in insectivores, but greater stability in seed dispersers.4. Our findings suggest that trait choice should be considered more carefully when applying such metrics in ecosystem management.