Community assembly in the presence of disturbance: a microcosm experiment

Ecology
Lin Jiang, Shivani N Patel

Abstract

Ecologists know relatively little about the manner in which disturbance affects the likelihood of alternative community stable states and how the history of community assembly affects the relationship between disturbance and species diversity. Using microbial communities comprising bacterivorous ciliated protists assembled in laboratory microcosms, we experimentally investigated these questions by independently manipulating the intensity of disturbance (in the form of density-independent mortality) and community assembly history (including a control treatment with simultaneous species introduction and five sequential assembly treatments). Species diversity patterns consistent with the intermediate disturbance hypothesis emerged in the controls, as several species showed responses indicative of a tradeoff between competitive ability and ability to recover from disturbance. Species diversity in communities with sequential assembly, however, generally declined with disturbance, owing to the increased extinction risk of later colonizers at the intermediate level of disturbance. Similarities among communities subjected to different assembly histories increased with disturbance, a result due possibly to increasing disturbance reducin...Continue Reading

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Citations

Oct 6, 2011·Oecologia·Romana Limberger, Stephen A Wickham
Dec 14, 2011·The ISME Journal·Silke LangenhederAnna J Székely
Feb 15, 2013·The ISME Journal·Scott FerrenbergDiana R Nemergut
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Jul 9, 2020·Proceedings. Biological Sciences·Claire Jacquet, Florian Altermatt

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