COVER PHOTO: Plants acting as ecosystem engineers, like the sandwort (Arenaria tetraquetra) pictured here with associated plants in Sierra Nevada, Spain, create habitats and facilitate biodiversity within plant communities. Biodiversity research has demonstrated that plant diversity enhances the productivity and functioning of ecosystems, however little is known of the role of ecosystem engineers in the relationship between biodiversity and ecosystem functioning across trophic levels. In this issue, Losapio et al. (Article e03243; doi:10.1002/ecy.3243) present an experimental framework to study this relationship. Photo credit: Gianalberto Losapio.

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封面照片：充当生态系统工程师的植物，如此处图片所示的沙棘（Arenaria tetraquetra）与西班牙内华达山脉的相关植物，在植物群落内创造了栖息地并促进了生物多样性。生物多样性研究表明，植物多样性可以提高生态系统的生产力和功能，但是，人们对生态系统工程师在营养级别之间的生物多样性和生态系统功能之间的关系中所起的作用知之甚少。在本期中，Losapio等人。（文章e03243； doi：10.1002 / ecy.3243）提出了研究这种关系的实验框架。图片来源：Gianalberto Losapio。