瑞士泥炭地微生物群落结构的调节因素是栖息地条件而非苔藓成分

IF 4.3 2区 生物学 Q2 MICROBIOLOGY Environmental microbiology Pub Date : 2024-05-17 DOI:10.1111/1462-2920.16631
Rachel Korn, Christian Berg, Louis-Félix Bersier, Sarah M. Gray, Gerhard G. Thallinger
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引用次数: 0

摘要

泥炭地是最古老的生态系统之一,在全球范围内储存着大量的碳和淡水。然而,它们正受到人类活动的严重威胁,导致这些微妙系统中的水分、养分和温度机制发生变化。这种变化会导致大量碳流入大气,并削弱泥炭地的持水能力。泥炭地中与苔藓相关的微生物在提供这些生态系统服务方面发挥着至关重要的作用,而这些服务正受到全球变化的威胁。因此,了解影响微生物组成和功能的因素至关重要。我们的研究重点是瑞士海拔梯度上的五块泥炭地,我们对含有紫云英的沼泽地上的苔藓进行了采样。结构方程模型显示,生境条件是群落结构的主要预测因素,并直接影响其他环境变量。有趣的是,微生物的组成与当地苔藓的物种特征无关。相反,不同地点的微生物群落因酸度水平和氮可用性的不同而存在显著差异。这一发现也反映在共现网络分析中,该分析显示酸度和氮可用性的指示物种分布各不相同。因此,泥炭地保护应考虑到苔藓相关微生物群落的关键生境特征。
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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Habitat conditions and not moss composition mediate microbial community structure in Swiss peatlands

Peatlands, one of the oldest ecosystems, globally store significant amounts of carbon and freshwater. However, they are under severe threat from human activities, leading to changes in water, nutrient and temperature regimes in these delicate systems. Such shifts can trigger a substantial carbon flux into the atmosphere and diminish the water-holding capacity of peatlands. Microbes associated with moss in peatlands play a crucial role in providing these ecosystem services, which are at risk due to global change. Therefore, understanding the factors influencing microbial composition and function is vital. Our study focused on five peatlands along an altitudinal gradient in Switzerland, where we sampled moss on hummocks containing Sarracenia purpurea. Structural equation modelling revealed that habitat condition was the primary predictor of community structure and directly influenced other environmental variables. Interestingly, the microbial composition was not linked to the local moss species identity. Instead, microbial communities varied significantly between sites due to differences in acidity levels and nitrogen availability. This finding was also mirrored in a co-occurrence network analysis, which displayed a distinct distribution of indicator species for acidity and nitrogen availability. Therefore, peatland conservation should take into account the critical habitat characteristics of moss-associated microbial communities.

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来源期刊
Environmental microbiology
Environmental microbiology 环境科学-微生物学
CiteScore
9.90
自引率
3.90%
发文量
427
审稿时长
2.3 months
期刊介绍: Environmental Microbiology provides a high profile vehicle for publication of the most innovative, original and rigorous research in the field. The scope of the Journal encompasses the diversity of current research on microbial processes in the environment, microbial communities, interactions and evolution and includes, but is not limited to, the following: the structure, activities and communal behaviour of microbial communities microbial community genetics and evolutionary processes microbial symbioses, microbial interactions and interactions with plants, animals and abiotic factors microbes in the tree of life, microbial diversification and evolution population biology and clonal structure microbial metabolic and structural diversity microbial physiology, growth and survival microbes and surfaces, adhesion and biofouling responses to environmental signals and stress factors modelling and theory development pollution microbiology extremophiles and life in extreme and unusual little-explored habitats element cycles and biogeochemical processes, primary and secondary production microbes in a changing world, microbially-influenced global changes evolution and diversity of archaeal and bacterial viruses new technological developments in microbial ecology and evolution, in particular for the study of activities of microbial communities, non-culturable microorganisms and emerging pathogens
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