ArticleApplied and environmental microbiology2026
Comparative analysis reveals distinct microbial community profiles and assembly mechanisms in sediments of coastal wetland ecosystems.
Article in Applied and environmental microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Coastal wetland ecosystems (CWEs), including mangroves, saltmarshes, and seagrasses, support vital biogeochemical cycles mediated by microbes, yet their global microbial diversity, distribution, and potential functions remain elusive. Thus, we analyzed 1,381 16S rRNA gene amplicon data sets targeting the V3-V4 and V4 regions to examine microbial diversity and assembly processes across these habitats. Results revealed significant differences in microbial diversity and composition among these ecosystems, with mangroves exhibiting the highest richness and diversity. The habitat-specific indicator taxa were Rhodothermia, Anaerolineaceae, and SBR1031 in mangroves, IMPORTANCE: Coastal wetlands, including mangroves, saltmarshes, and seagrasses, protect shorelines and play a critical role in regulating the global climate. Microbial communities maintain the stability and essential functions of these ecosystems. This study provided the first comprehensive global map of microbial communities in the three ecosystems. By analyzing over 1,381 samples, the results revealed that different habitats relied on different diversity, composition, and dominant taxa. Mangroves showed the highest richness and diversity. KEGG-based functional predictions suggested that microbial communities in the CWEs shared core predicted metabolic functions but differed in their predicted functional potentials. The null model revealed that the assembly process of the three habitats is mainly shaped by stochastic ecological drift. However, deterministic selection also played a significant role in structuring saltmarsh and mangrove communities, suggesting that environmental factors commonly influenced the community assembly. Understanding these patterns is crucial for conservation because it allows scientists to better predict how coastal protection and carbon storage face increasing pressure from human activity.
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