Functional identity and diversity of animals predict ecosystem functioning better than species-based indices
Functional identity and diversity of animals predict ecosystem functioning better than species-based indices
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DOI：
10.1098/rspb.2014.2620
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发表时间：
2015-02-22
影响因子：
4.7
通讯作者：
Bommarco, Riccardo
中科院分区：
文献类型：
--
作者：
Gagic, Vesna;Bartomeus, Ignasi;Bommarco, Riccardo
生物多样性的急剧下降引起了人们对生态系统功能恶化的关注，并促使人们最近对物种多样性与生态系统功能之间的关系进行了大量研究。已经提出了一个功能性状框架，以提高这种关系的机械理解，但这很少被测试的生物体以外的植物。我们分析了八个数据集，包括五个动物群体，以研究与更传统的方法相比，基于特征的方法有多好。分类方法，预测七个生态系统功能地下和地上。基于特征的指数始终提供更大的解释力比物种丰富度或丰富度。群落中单个或多个性状的频率分布是生态系统功能的最佳预测因子。这意味着，我们调查的生态系统功能的支持下的性状身份（即单性状指数）和性状互补性（即多性状指数）的社区。我们的研究为将生物多样性与自然动物群落中的生态系统功能联系起来的一般机制提供了新的见解，并表明观察到的反应是由于性状组成的身份和优势模式，而不是物种本身的数量或丰度。
Drastic biodiversity declines have raised concerns about the deterioration of ecosystem functions and have motivated much recent research on the relationship between species diversity and ecosystem functioning. A functional trait framework has been proposed to improve the mechanistic understanding of this relationship, but this has rarely been tested for organisms other than plants. We analysed eight datasets, including five animal groups, to examine how well a trait-based approach, compared with a more traditional. taxonomic approach, predicts seven ecosystem functions below- and above-ground. Trait-based indices consistently provided greater explanatory power than species richness or abundance. The frequency distributions of single or multiple traits in the community were the best predictors of ecosystem functioning. This implies that the ecosystem functions we investigated were underpinned by the combination of trait identities (i.e. single-trait indices) and trait complementarity (i.e. multi-trait indices) in the communities. Our study provides new insights into the general mechanisms that link biodiversity to ecosystem functioning in natural animal communities and suggests that the observed responses were due to the identity and dominance patterns of the trait composition rather than the number or abundance of species per se.