State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 730000, China.
Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station of Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, 200438, China.
Nat Commun. 2024 May 27;15(1):4506. doi: 10.1038/s41467-024-48876-z.
Biodiversity often helps communities resist invasion. However, it is unclear whether this diversity-invasion relationship holds true under environmental changes. Here, we conduct a meta-analysis of 1010 observations from 25 grassland studies in which plant species richness is manipulated together with one or more environmental change factors to test invasibility (measured by biomass or cover of invaders). We find that biodiversity increases resistance to invaders across various environmental conditions. However, the positive biodiversity effect on invasion resistance is strengthened under experimental warming, whereas it is weakened under experimentally imposed drought. When multiple factors are imposed simultaneously, the positive biodiversity effect is strengthened. Overall, we show that biodiversity helps grassland communities resist plant invasions under multiple environmental changes. Therefore, investment in the protection and restoration of native biodiversity is not only important for prevention of invasions under current conditions but also under continued global environmental change.
生物多样性通常有助于群落抵抗入侵。然而，在环境变化下，这种多样性-入侵关系是否成立还不清楚。在这里，我们对 25 项草地研究中的 1010 个观测值进行了荟萃分析，这些研究中同时操纵了植物物种丰富度和一个或多个环境变化因素，以测试入侵性（通过入侵物种的生物量或盖度来衡量）。我们发现，在各种环境条件下，生物多样性增加了对入侵物种的抵抗力。然而，在实验增温下，生物多样性对入侵抵抗力的正向影响增强，而在实验施加干旱下则减弱。当同时施加多个因素时，生物多样性的正向影响增强。总体而言，我们表明，在多种环境变化下，生物多样性有助于草地群落抵抗植物入侵。因此，保护和恢复本地生物多样性的投资不仅对当前条件下的入侵预防很重要，而且对持续的全球环境变化也很重要。
