数字农科院2.0

Species diversity and food web structure jointly shape natural biological control in agricultural landscapes

文献类型： 外文期刊

作者： Fan Yang;Bing Liu;Yulin Zhu;Kris A.G. Wyckhuys;Wopke van der Werf;Yanhui Lu

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期刊名称： Communications Biology

ISSN： 2399-3642

年卷期： 2021 年 4.0 卷 1.0 期

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收录情况： JCR（2021版）

摘要： Land-use change and agricultural intensification concurrently impact natural enemy (e.g., parasitoid) communities and their associated ecosystem services (ESs), i.e., biological pest control. However, the extent to which (on-farm) parasitoid diversity and food webs mediate landscape-level influences on biological control remains poorly understood. Here, drawing upon a 3-year study of quantitative parasitoid-hyperparasitoid trophic networks from 25 different agro-landscapes, we assess the cascading effects of landscape composition, species diversity and trophic network structure on ecosystem functionality (i.e., parasitism, hyperparasitism). Path analysis further reveals cascaded effects leading to biological control of a resident crop pest, i.e., Aphis gossypii. Functionality is dictated by (hyper)parasitoid diversity, with its effects modulated by food web generality and vulnerability. Non-crop habitat cover directly benefits biological control, whereas secondary crop cover indirectly lowers hyperparasitism. Our work underscores a need to simultaneously account for on-farm biodiversity and trophic interactions when investigating ESs within dynamic agro-landscapes.

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