The relative importance of plant intraspecific diversity in structuring arthropod communities: a meta-analysis

1. Understanding how plant diversity influences higher trophic levels is important for predicting the consequences of global biodiversity loss. While early studies have focused on the effects of plant species richness, more recently a growing number of experiments have explored the effects of plant intraspecific diversity by manipulating the genotypic richness of plant communities. 2. By combining 162 estimates of effect size from 60 experimental studies, we examined the effects of plant genotypic richness on arthropods, one of the most diverse and abundant taxa which play a crucial role in many ecosystem processes and services. We have also compared the effects of plant genetic and species diversity on arthropods when both were manipulated within the same study. 3. Species richness and abundance of most trophic groups of arthropods was higher in genetically diverse plant stands. Interestingly, the effects of plant genetic diversity on natural enemies of herbivores were stronger than th...

1. 阐明植物多样性如何影响更高营养级，对于预测全球生物多样性丧失的生态后果至关重要。早期研究多聚焦于植物物种丰富度的生态效应，而近年来越来越多实验通过操控植物群落的基因型丰富度，探讨了植物种内多样性的影响。2. 本研究整合了60项实验研究中的162个效应量估计值，分析了植物基因型丰富度对节肢动物的影响——节肢动物是多样性与丰度均位居前列的类群，在诸多生态系统过程与服务中发挥关键作用。此外，本研究还对比了在同一实验中同时操控植物遗传多样性与物种多样性时，二者对节肢动物的效应差异。3. 多数节肢动物营养类群的物种丰富度与个体丰度，在基因型多样的植物样地中显著更高。值得注意的是，植物遗传多样性对植食动物天敌的效应强于...