Seasonal and interannual variability of the free-living and particle-associated bacteria of a coastal microbiome

IF 3.6 4区 生物学 Q2 ENVIRONMENTAL SCIENCES Environmental Microbiology Reports Pub Date : 2024-07-31 DOI:10.1111/1758-2229.13299
Isabel Ferrera, Adrià Auladell, Vanessa Balagué, Albert Reñé, Esther Garcés, Ramon Massana, Josep M. Gasol
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Abstract

Marine microbial communities differ genetically, metabolically, and ecologically according to their lifestyle, and they may respond differently to environmental changes. In this study, we investigated the seasonal dynamics of bacterial assemblies in the free-living (FL) and particle-associated (PA) fractions across a span of 6 years in the Blanes Bay Microbial Observatory in the Northwestern Mediterranean. Both lifestyles showed marked seasonality. The trends in alpha diversity were similar, with lower values in spring–summer than in autumn-winter. Samples from both fractions were grouped seasonally and the percentage of community variability explained by the measured environmental variables was comparable (32% in FL and 31% in PA). Canonical analyses showed that biotic interactions were determinants of bacterioplankton dynamics and that their relevance varies depending on lifestyles. Time-decay curves confirmed a high degree of predictability in both fractions. Yet, ‘seasonal’ Amplicon Sequence Variants (ASVs) (as defined by Lomb Scargle time series analysis) in the PA communities represented 46% of the total relative abundance while these accounted for 30% in the FL fraction. These results demonstrate that bacteria inhabiting both fractions exhibit marked seasonality, highlighting the importance of accounting for both lifestyles to fully comprehend the dynamics of marine prokaryotic communities.

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沿岸微生物群中自由生活细菌和颗粒相关细菌的季节和年际变化。
海洋微生物群落因其生活方式的不同而在基因、代谢和生态学方面存在差异,它们可能会对环境变化做出不同的反应。在这项研究中,我们调查了地中海西北部布拉尼斯湾微生物观测站 6 年间自由生活(FL)和颗粒相关(PA)部分细菌群落的季节动态。两种生活方式都表现出明显的季节性。阿尔法多样性的趋势相似,春夏季的数值低于秋冬季。这两种生活方式的样本都按季节分组,由测量的环境变量解释的群落变异百分比相当(FL 为 32%,PA 为 31%)。典型分析表明,生物相互作用是浮游细菌动态的决定因素,其相关性因生活方式而异。时间衰减曲线证实了这两个部分的高度可预测性。然而,PA 群落中的 "季节性 "扩增子序列变异(ASVs)(由 Lomb Scargle 时间序列分析确定)占总相对丰度的 46%,而在 FL 群落中则占 30%。这些结果表明,栖息在这两个部分的细菌都表现出明显的季节性,突出了考虑这两种生活方式对全面了解海洋原核生物群落动态的重要性。
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来源期刊
Environmental Microbiology Reports
Environmental Microbiology Reports ENVIRONMENTAL SCIENCES-MICROBIOLOGY
CiteScore
6.00
自引率
3.00%
发文量
91
审稿时长
3.0 months
期刊介绍: The journal is identical in scope to Environmental Microbiology, shares the same editorial team and submission site, and will apply the same high level acceptance criteria. The two journals will be mutually supportive and evolve side-by-side. Environmental Microbiology Reports 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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