豚草
生物
植物群落
生物多样性
生态学
入侵物种
草原
生态系统
特质
物种丰富度
抗性(生态学)
豚草
计算机科学
程序设计语言
免疫学
过敏
作者
Shao‐peng Li,Pu Jia,Shu‐ya Fan,Yingtong Wu,Xiang Liu,Yani Meng,Yue Li,Wen‐Sheng Shu,Jin‐tian Li,Lin Jiang
摘要
Elton's biotic resistance hypothesis, which posits that diverse communities should be more resistant to biological invasions, has received considerable experimental support. However, it remains unclear whether such a negative diversity-invasibility relationship would persist under anthropogenic environmental change. By using the common ragweed (Ambrosia artemisiifolia) as a model invader, our 4-year grassland experiment demonstrated consistently negative relationships between resident species diversity and community invasibility, irrespective of nitrogen addition, a result further supported by a meta-analysis. Importantly, our experiment showed that plant diversity consistently resisted invasion simultaneously through increased resident biomass, increased trait dissimilarity among residents, and increased community-weighted means of resource-conservative traits that strongly resist invasion, pointing to the importance of both trait complementarity and sampling effects for invasion resistance even under resource enrichment. Our study provides unique evidence that considering species' functional traits can help further our understanding of biotic resistance to biological invasions in a changing environment.
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