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Aboveground herbivory can promote exotic plant invasion through intra- and interspecific aboveground-belowground interactions

文献类型： 外文期刊

作者： Gao, Lunlun 1 ; Wei, Chunqiang 1 ; He, Yifan 1 ; Tang, Xuefei 1 ; Chen, Wei 1 ; Xu, Hao 1 ; Wu, Yuqing 5 ; Wilschut, Rutger A. 6 ; Lu, Xinmin 1 ;

作者机构： 1.Huazhong Agr Univ, State Key Lab Agr Microbiol, Wuhan 430070, Hubei, Peoples R China

2.Hubei Hongshan Lab, Wuhan 430070, Hubei, Peoples R China

3.Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan 430070, Hubei, Peoples R China

4.Chinese Acad Sci, Guangxi Inst Bot, Guilin 540016, Peoples R China

5.Henan Acad Agr Sci, Inst Plant Protect, Zhengzhou 450002, Henan, Peoples R China

6.Univ Konstanz, Dept Biol, Ecol Grp, D-78464 Constance, Germany

7.Wageningen Univ & Res, Dept Nematol, NL-6708 PB Wageningen, Netherlands

关键词： aboveground-belowground interactions; biological control; herbivore; invasive plant; plant invasions; plant-soil feedback; soil biota

期刊名称：NEW PHYTOLOGIST （ 影响因子：10.323； 五年影响因子：10.768 ）

ISSN： 0028-646X

年卷期：

页码：

收录情况： SCI

摘要： Aboveground herbivores and soil biota profoundly affect plant invasions. However, how they interactively affect plant invasions through plant-soil feedbacks (PSFs) remains unclear. To explore how herbivory by the introduced beetle Agasicles hygrophila affects Alternanthera philoxeroides invasions in China, we integrated multiyear field surveys and a 2-yr PSF experiment, in which we examined how herbivory affects PSFs on the performance of native and invasive plants and the introduced beetles. Despite increased herbivory from A. hygrophila, A. philoxeroides dominance over co-occurring congeneric native Alternanthera sessilis remained constant from 2014 to 2019. While occurring at lower abundances, A. sessilis experienced similar herbivore damage, suggesting apparent competitive effects. Our experiments revealed that herbivory on A. philoxeroides altered soil microbial communities, prolonged its negative PSF on A. sessilis, and decreased A. hygrophila larvae performance on the next-generation invasive plants. Consequently, A. hygrophila larvae performed better on leaves of natives than those of invasives when grown in soils conditioned by invasive plants defoliated by the introduced beetles. Our findings suggest that aboveground herbivory might promote rather than suppress A. philoxeroides invasion by enhancing its soil-mediated self-reinforcement, providing a novel mechanistic understanding of plant invasions. These findings highlight the need to incorporate an aboveground-belowground perspective during the assessment of potential biocontrol agents.

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