Microbial Community Structure in Marine and Coastal Sediments

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Environmental Microbiology".

Deadline for manuscript submissions: closed (31 July 2024) | Viewed by 2238

Special Issue Editor


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Guest Editor
Chemistry-Sisal Unit, Faculty of Chemistry, National Autonomous University of Mexico, Sisal 97356, Mexico
Interests: marine microbial ecology and natural product discovery; marine invertebrate microbiomes; coastal marine sediment ecology

Special Issue Information

Dear Colleagues,

As is well known, marine sediments harbor diverse microbial communities, including bacteria, archaea, fungi, and microeukaryotes. They play key roles in the degradation and recycling of organic matter through processes such as carbon and nitrogen cycling. Through these activities, they release essential nutrients back into the marine environment, facilitating the overall productivity of the ecosystem. Furthermore, novel enzymes or bioactive compounds with potential industrial or pharmaceutical uses could be found in microorganisms in this ecosystem. However, marine sediments are subjected to anthropic stressors, including oil pollution. These stressors affect the structure and function of the microbial community, which impacts biogeochemical cycling. This Special Issue aims to address the microbial community structure in marine sediments and explore the function of these microbial communities in marine ecosystems, as well as addressing environmental challenges in coastal zones and beyond. Research articles, review articles, and short communications related to the microbial community structure in marine and coastal sediments are welcome.

Dr. Alejandra Prieto-Davó
Guest Editor

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Keywords

  • microbial communities
  • microbial symbiosis
  • marine ecology
  • coastal sediment

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Published Papers (3 papers)

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Research

15 pages, 19280 KiB  
Article
Comparing the Environmental Influences and Community Assembly of Protist Communities in Two Anthropogenic Coastal Areas
by Wenwen Qiao, Hongbo Li, Jinyong Zhang, Xiaohan Liu, Ruofei Jin and Hongjun Li
Microorganisms 2024, 12(8), 1618; https://doi.org/10.3390/microorganisms12081618 - 8 Aug 2024
Viewed by 301
Abstract
Anthropogenic stresses are intensively affecting the structure and function of microbial communities in coastal ecosystems. Despite being essential components of coastal ecosystems, the environmental influences and assembly processes of protist communities remain largely unknown in areas with severe disturbance. Here, we used 18S [...] Read more.
Anthropogenic stresses are intensively affecting the structure and function of microbial communities in coastal ecosystems. Despite being essential components of coastal ecosystems, the environmental influences and assembly processes of protist communities remain largely unknown in areas with severe disturbance. Here, we used 18S rRNA gene high-throughput sequencing to compare the composition, assembly process, and functional structure of the protist communities from the coastal areas of the Northern Yellow Sea (NYS) and the Eastern Bohai Sea (EBS). These two areas are separated by the Liaodong Peninsula and experience different anthropogenic stresses due to varying degrees of urbanization. We detected significant differences between the protist communities of the two areas. Environmental and geographic factors both influenced the composition of protist communities, with environmental factors playing a greater role. The neutral community model indicated that the assembly of protist communities was governed by deterministic processes, with stochastic processes having a stronger influence in the EBS area compared to the NYS area. The phototrophic and consumer communities, influenced by different environmental factors, differed significantly between the two areas. Our results provide insights into the biogeography and assembly of protist communities in estuaries under anthropogenic stresses, which may inform future coastal management. Full article
(This article belongs to the Special Issue Microbial Community Structure in Marine and Coastal Sediments)
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20 pages, 3713 KiB  
Article
Exploring the Microbial Mosaic: Insights into Composition, Diversity, and Environmental Drivers in the Pearl River Estuary Sediments
by Tal Zvi-Kedem, Maya Lalzar, Jing Sun, Jiying Li, Dan Tchernov and Dalit Meron
Microorganisms 2024, 12(7), 1273; https://doi.org/10.3390/microorganisms12071273 - 23 Jun 2024
Viewed by 475
Abstract
River estuaries are dynamic and complex ecosystems influenced by various natural processes, including climatic fluctuations and anthropogenic activities. The Pearl River Estuary (PRE), one of the largest in China, receives significant land-based pollutants due to its proximity to densely populated areas and urban [...] Read more.
River estuaries are dynamic and complex ecosystems influenced by various natural processes, including climatic fluctuations and anthropogenic activities. The Pearl River Estuary (PRE), one of the largest in China, receives significant land-based pollutants due to its proximity to densely populated areas and urban development. This study aimed to characterize the composition, diversity, and distribution patterns of sediment microbial communities (bacteria, archaea, and eukaryotes) and investigated the connection with environmental parameters within the PRE and adjacent shelf. Physicochemical conditions, such as oxygen levels, nitrogen compounds, and carbon content, were analyzed. The study found that the microbial community structure was mainly influenced by site location and core depth, which explained approximately 67% of the variation in each kingdom. Sites and core depths varied in sediment properties such as organic matter content and redox conditions, leading to distinct microbial groups associated with specific chemical properties of the sediment, notably C/N ratio and NH4+ concentration. Despite these differences, certain dominant taxonomic groups were consistently present across all sites: Gammaproteobacteria in bacteria; Bathyarchaeia, Nitrososphaeria, and Thermoplasmata in archaea; and SAR in Eukaryota. The community diversity index was the highest in the bacteria kingdom, while the lowest values were observed at site P03 across the three kingdoms and were significantly different from all other sites. Overall, this study highlights the effect of depth, core depth, and chemical properties on sediment microbiota composition. The sensitivity and dynamism of the microbiota, along with the possibility of identifying specific markers for changes in environmental conditions, is valuable for managing and preserving the health of estuaries and coastal ecosystems. Full article
(This article belongs to the Special Issue Microbial Community Structure in Marine and Coastal Sediments)
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17 pages, 3328 KiB  
Article
Structure of Benthic Microbial Communities in the Northeastern Part of the Barents Sea
by Aleksandra R. Stroeva, Alexandra A. Klyukina, Olesya N. Vidishcheva, Elena N. Poludetkina, Marina A. Solovyeva, Vladislav O. Pyrkin, Liliya A. Gavirova, Nils-Kåre Birkeland, Grigorii G. Akhmanov, Elizaveta A. Bonch-Osmolovskaya and Alexander Y. Merkel
Microorganisms 2024, 12(2), 387; https://doi.org/10.3390/microorganisms12020387 - 15 Feb 2024
Cited by 2 | Viewed by 1015
Abstract
The Barents Sea shelf is one of the most economically promising regions in the Arctic in terms of its resources and geographic location. However, benthic microbial communities of the northeastern Barents Sea are still barely studied. Here, we present a detailed systematic description [...] Read more.
The Barents Sea shelf is one of the most economically promising regions in the Arctic in terms of its resources and geographic location. However, benthic microbial communities of the northeastern Barents Sea are still barely studied. Here, we present a detailed systematic description of the structures of microbial communities located in the sediments and bottom water of the northeastern Barents Sea based on 16S rRNA profiling and a qPCR assessment of the total prokaryotic abundance in 177 samples. Beta- and alpha-diversity analyses revealed a clear difference between the microbial communities of diverse sediment layers and bottom-water fractions. We identified 101 microbial taxa whose representatives had statistically reliable distribution patterns between these ecotopes. Analysis of the correlation between microbial community structure and geological data yielded a number of important results—correlations were found between the abundance of individual microbial taxa and bottom relief, thickness of marine sediments, presence of hydrotrolite interlayers, and the values of pH and Eh. We also demonstrated that a relatively high abundance of prokaryotes in sediments can be caused by the proliferation of Deltaproteobacteria representatives, in particular, sulfate and iron reducers. Full article
(This article belongs to the Special Issue Microbial Community Structure in Marine and Coastal Sediments)
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