Phylogenetic relatedness drives litter-mediated diversity-invasibility relationships.

IF 8.1 1区生物学 Q1 PLANT SCIENCES

New Phytologist Pub Date : 2025-09-20 DOI:10.1111/nph.70563

Chaofang Sun,Cai Cheng,Zhijie Zhang,Mei Ye,Yanyan Li,Evan Siemann,Mu Liu,Xue Zhang,Yi Wang,Bo Li,Xiang Liu,Jihua Wu

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引用次数: 0

Abstract

Native plant diversity typically enhances community resistance to biological invasions by reducing resource availability and by accumulating natural enemies. However, after senescence, litter-mediated processes may either strengthen resistance through pathogen spillover or promote invasion through nutrient enrichment. We experimentally partitioned nutrient and pathogen effects to test how litter diversity and phylogenetic relatedness between native and invasive species shape invasion outcomes. Three invasive Asteraceae species were exposed to diseased litter from native plants that were either closely or distantly related, while manipulating litter diversity (1, 2, or 6 species) and pathogen presence (with or without fungicide). Higher litter diversity from closely related natives suppressed invader biomass. Fungicide treatment eliminated this effect, demonstrating that pathogen spillover mediated diversity-driven invasion resistance. Conversely, litter from distantly related natives enhanced invader biomass with increasing diversity due to nutrient enrichment. Our results show that phylogenetic relatedness structures the balance between pathogen spillover and nutrient enrichment, determining whether native diversity reinforces or undermines invasion resistance through litter pathways.

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系统发育亲缘关系驱动凋落物介导的多样性-入侵性关系。

原生植物多样性通常通过减少资源可用性和积累天敌来增强群落对生物入侵的抵抗力。然而，在衰老之后，凋落物介导的过程可能通过病原体外溢增强抗性，也可能通过养分富集促进入侵。我们通过实验划分了营养和病原体的影响，以测试本地和入侵物种之间的凋落物多样性和系统发育相关性如何影响入侵结果。将三种入侵的菊科植物暴露于亲缘或远缘本地植物的病枯落物中，同时控制凋落物的多样性（1、2或6种）和病原体的存在（使用或不使用杀菌剂）。来自近亲本地的较高凋落物多样性抑制了入侵生物量。杀菌剂处理消除了这种影响，表明病原体溢出介导了多样性驱动的入侵抗性。相反，来自远亲原生植物的凋落物由于营养丰富而增加了入侵生物量，增加了多样性。我们的研究结果表明，系统发育相关性构建了病原体溢出和营养富集之间的平衡，决定了本地多样性是通过凋落物途径增强还是破坏入侵抗性。

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来源期刊

New Phytologist 生物-植物科学

自引率

5.30%

发文量

728

期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.