Abiotic stress destabilizes the bacterial community of sugar kelp, Saccharina latissima (Phaeophyceae).

IF 2.8 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Siobhan Schenk, Connor Glen Wardrop, Laura Wegener Parfrey
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引用次数: 0

Abstract

As climate change progresses, the intensity and variability of freshwater outflow into the ocean are predicted to increase. The resulting increase in low-salinity events, paired with other abiotic stressors (including increasing temperatures), will be a source of stress for the kelp Saccharina latissima (Saccharina hereafter) and potentially Saccharina-associated bacteria. Bacteria influence host health and can facilitate or hinder host survival and acclimation to stressful abiotic conditions. Therefore, understanding how bacterial communities change under abiotic stress is critical for understanding how abiotic stress will affect kelp physiology. We investigated the effect of abiotic stress on Saccharina and associated bacteria by surveying the bacterial community associated with Saccharina across naturally occurring salinity and temperature gradients, coupled with salinity manipulation experiments. Overall, Saccharina harbored a stable core bacterial community, which decreased in relative abundance under abiotic stress. In the field, both salinity and temperature shaped the bacterial community, with temperature having higher explanatory power most of the time. In the lab, we confirmed that the patterns observed in the field could be replicated by manipulating salinity alone. Decreased relative abundance of core bacteria and increased community dissimilarity in low-salinity in the lab suggest that low-salinity alone can induce a stress response, detectable in the bacterial community of Saccharina.

非生物胁迫破坏了糖海带(糖藻科)细菌群落的稳定性。
随着气候变化的进展,预计流入海洋的淡水的强度和变异性将增加。由此导致的低盐度事件的增加,加上其他非生物压力源(包括温度升高),将成为海带Saccharina latisima(以下简称Saccharina)和潜在的Saccharina相关细菌的压力来源。细菌影响宿主的健康,可以促进或阻碍宿主的生存和适应压力的非生物条件。因此,了解细菌群落在非生物胁迫下的变化对于了解非生物胁迫对海带生理的影响至关重要。本研究通过对不同盐度和温度梯度下与Saccharina相关的细菌群落进行调查,并结合盐度操纵实验,研究了非生物胁迫对Saccharina及其相关细菌的影响。总体而言,糖精中有一个稳定的核心菌群,在非生物胁迫下相对丰度下降。在野外,盐度和温度共同塑造了细菌群落,温度在大多数情况下具有更高的解释力。在实验室里,我们证实了在野外观察到的模式可以通过单独操纵盐度来复制。在实验室中,低盐度条件下核心细菌相对丰度的降低和群落差异的增加表明,低盐度单独可以诱导应激反应,在Saccharina细菌群落中可以检测到。
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
Journal of Phycology
Journal of Phycology 生物-海洋与淡水生物学
CiteScore
6.50
自引率
3.40%
发文量
69
审稿时长
2 months
期刊介绍: The Journal of Phycology was founded in 1965 by the Phycological Society of America. All aspects of basic and applied research on algae are included to provide a common medium for the ecologist, physiologist, cell biologist, molecular biologist, morphologist, oceanographer, taxonomist, geneticist, and biochemist. The Journal also welcomes research that emphasizes algal interactions with other organisms and the roles of algae as components of natural ecosystems. All aspects of basic and applied research on algae are included to provide a common medium for the ecologist, physiologist, cell biologist, molecular biologist, morphologist, oceanographer, acquaculturist, systematist, geneticist, and biochemist. The Journal also welcomes research that emphasizes algal interactions with other organisms and the roles of algae as components of natural ecosystems.
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