Trait–environmental relationships reveal microbial strategies of environmental adaptation

IF 4.4 2区 环境科学与生态学 Q1 ECOLOGY
Ecology Pub Date : 2025-03-04 DOI:10.1002/ecy.70047
Minglei Ren, Ang Hu, Zhonghua Zhao, Xiaolong Yao, Ismael Aaron Kimirei, Lu Zhang, Jianjun Wang
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引用次数: 0

Abstract

Microbial trait variation along environmental gradients is crucial to understanding their ecological adaptation mechanisms. With the increasing availability of microbial genomes, making full use of the genome-based traits to decipher their adaptation strategies becomes promising and urgent. Here, we examined microbial communities in water and sediments of 20 East African lakes with pH values ranging from 7.2 to 10.1 through taxonomic profiling and genome-centric metagenomics. We identified functional traits important for microbial adaptation to the stresses of alkalinity and salinity based on the significant trait–environment relationships (TERs), including those involved in cytoplasmic pH homeostasis, compatible solute accumulation, cell envelope modification, and energy requisition. By integrating these significant traits, we further developed an environmental adaptation index to quantify the species-level adaptive capacity for environmental stresses, such as high pH environments. The adaptation index of pH showed consistently significant positive relationships with species pH optima across regional and global genomic datasets from freshwater, marine, and soda lake ecosystems. The generality of the index for quantifying environmental adaptation was demonstrated by showing significant relationships with the species niche optima for the gradients of soil temperature and seawater salinity. These results highlight the importance of TERs in facilitating the inference of microbial genomic-based adaptation mechanisms and expand our understanding of ecological adaptive strategies along environmental gradients.

性状-环境关系揭示了微生物的环境适应策略
微生物性状随环境梯度的变化是了解其生态适应机制的关键。随着微生物基因组可用性的不断提高,充分利用基因组特征来破译其适应策略已成为一种迫切而有前景的研究方向。在这里,我们通过分类分析和以基因组为中心的宏基因组学研究了20个东非湖泊的水和沉积物中的微生物群落,pH值从7.2到10.1不等。基于显著的性状-环境关系(TERs),我们确定了微生物适应碱度和盐度胁迫的重要功能性状,包括细胞质pH稳态、相容溶质积累、包膜修饰和能量需求。通过整合这些重要性状,我们进一步建立了一个环境适应指数来量化物种对环境胁迫(如高pH环境)的适应能力。在淡水、海洋和苏打湖生态系统的区域和全球基因组数据集中,pH适应指数与物种pH最优值呈显著正相关。土壤温度梯度和海水盐度梯度与物种生态位最优值之间存在显著关系,证明了该指标量化环境适应的普遍性。这些结果突出了ter在促进微生物基因组适应机制推断方面的重要性,并扩展了我们对沿环境梯度的生态适应策略的理解。
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
Ecology
Ecology 环境科学-生态学
CiteScore
8.30
自引率
2.10%
发文量
332
审稿时长
3 months
期刊介绍: Ecology publishes articles that report on the basic elements of ecological research. Emphasis is placed on concise, clear articles documenting important ecological phenomena. The journal publishes a broad array of research that includes a rapidly expanding envelope of subject matter, techniques, approaches, and concepts: paleoecology through present-day phenomena; evolutionary, population, physiological, community, and ecosystem ecology, as well as biogeochemistry; inclusive of descriptive, comparative, experimental, mathematical, statistical, and interdisciplinary approaches.
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