Impact of timing on the invasion of synthetic bacterial communities.

IF 10.8 1区 环境科学与生态学 Q1 ECOLOGY
Keven D Dooley, Lucas P Henry, Joy Bergelson
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Abstract

Microbial communities regularly experience ecological invasions that can lead to changes in composition and function. Factors thought to impact susceptibility to invasions, such as diversity and resource use, vary over the course of community assembly. We used synthetic bacterial communities to evaluate the success and impact of invasions occurring at different times during the community assembly process. Fifteen distinct communities were subjected to each of three bacterial invaders at the initial assembly of the community ("initial invasion"), 24 hours into community assembly ("early invasion"), when the community was still undergoing transient dynamics, and 7 days into community assembly ("late invasion"), once the community had settled into its final composition. Communities were passaged daily and characterized through sequencing after reaching a stable composition. Invasions often failed to persist over time, particularly in higher richness communities. However, invasions had their largest effect on composition when they occurred before a community had settled into a stable composition. We found instances where an invader was ultimately excluded yet had profound and long-lasting effects on invaded communities. Invasion outcome was positively associated with lower community richness and resource use efficiency by the community, which varied throughout assembly. Our results demonstrate that microbial communities experiencing transient community dynamics are more affected by, and in some instances prone to, invasion, a finding relevant to efforts to modify the composition of microbial communities.

时间对合成细菌群落入侵的影响
微生物群落经常会遭遇生态入侵,从而导致其组成和功能发生变化。被认为会影响入侵易感性的因素(如多样性和资源利用)在群落组装过程中会发生变化。我们利用合成细菌群落来评估群落组装过程中不同时期发生的入侵的成功率和影响。15 个不同的群落分别在群落组装初期("初期入侵")、群落组装 24 小时后("早期入侵")和群落组装 7 天后("晚期入侵")受到三种细菌入侵者的侵袭,前者是在群落组装初期,后者是在群落组装 24 小时后,此时群落仍处于瞬时动态变化过程中。在群落达到稳定组成后,每天对群落进行传代,并通过测序进行特征描述。入侵往往不能长期存在,特别是在丰富度较高的群落中。然而,当入侵发生在群落达到稳定组成之前时,对组成的影响最大。我们发现,在一些情况下,入侵者最终被排除在外,但却对被入侵的群落产生了深远而持久的影响。入侵的结果与较低的群落丰富度和群落的资源利用效率呈正相关,这在整个组装过程中各不相同。我们的研究结果表明,经历短暂群落动态变化的微生物群落受入侵的影响更大,而且在某些情况下容易受到入侵,这一发现与改变微生物群落组成的努力相关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
ISME Journal
ISME Journal 环境科学-生态学
CiteScore
22.10
自引率
2.70%
发文量
171
审稿时长
2.6 months
期刊介绍: The ISME Journal covers the diverse and integrated areas of microbial ecology. We encourage contributions that represent major advances for the study of microbial ecosystems, communities, and interactions of microorganisms in the environment. Articles in The ISME Journal describe pioneering discoveries of wide appeal that enhance our understanding of functional and mechanistic relationships among microorganisms, their communities, and their habitats.
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