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首页> 外文期刊>Bulletin of the Ecological Society of America >Foliar Pathogens Are Unlikely to Stabilize Coexistence of Competing Species in a California Grassland
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Foliar Pathogens Are Unlikely to Stabilize Coexistence of Competing Species in a California Grassland

机译：叶病原体不太可能稳定加利福尼亚草原上竞争物种的共存。

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摘要

Pathogens are ubiquitous. If pathogens increase with preferred host(s), theymay suppress common species and benefit rare species, promoting species diver-sity. Despite their proposed importance, the impacts, identities, and host rangesof pathogens in natural communities are relatively unknown. We identified foliarfungal pathogens and evaluated host specificity and fitness impacts in a Califor-nia grassland. Contrary to prevailing hypotheses, most pathogens were relativelyunspecialized, caused damage that was independent of host relative abundance,and had weak fitness impacts. Together, this suggests that foliar fungal pathogensare unlikely to promote negative frequency dependence or plant species coexis-tence in this California grassland.
机译：病原体无处不在。如果病原体随首选寄主而增加，它们可能会抑制常见物种并有益于稀有物种，从而促进物种多样性。尽管提出了其重要性，但相对未知自然社区中病原体的影响，身份和寄主范围。我们鉴定了叶真菌病原体，并评估了加利福尼亚草场的宿主特异性和适应性影响。与流行的假设相反，大多数病原体是相对非专业的，所造成的损害与宿主的相对丰度无关，并且对健康的影响较弱。总之，这表明叶真菌病原体不太可能促进该加利福尼亚草原的负频率依赖性或植物物种共存。

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