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Life
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Microbial Diversity and Function in Aquatic Environments
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Microbial Diversity and Function in Aquatic Environments

A special issue of Life (ISSN 2075-1729). This special issue belongs to the section "Microbiology".

Deadline for manuscript submissions: 30 May 2025 | Viewed by 2076

Special Issue Editors

Dr. Xianglong Chen

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Guest Editor
School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China
Interests: groundwater; aquatic microbes; nitrogen cycling; biodiversity and biogeochemistry
Dr. Liang Guo

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Guest Editor
College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China
Interests: groundwater microbiology; hydrochemistry; microbial diversity and function; biogeochemical cycle
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Water resources are fully connected to multiple layers of the earth's surface, including atmosphere, lithosphere, etc., and are essential carriers of elements cycling, energy conversion, and information transmission. The aquatic environment is highly variable, from oligotrophic groundwater to eutrophic rivers and lakes, from low-salinity freshwater to high-salinity seawater and underground brine, and from glaciers to thermal springs. The aquatic environment harbors countless microorganisms, and these invisible microbes possess abilities beyond imagination. Microorganisms accept, adapt, and alter their living environment. As hydrochemical factors vary (e.g., temperature, pH, dissolved oxygen, salinity, electron donors and acceptors, redox substances), acidophilic, thermophilic, and salt-tolerant microorganisms aggregate accordingly in response to different survival stress in specific aquatic environments. Microorganisms widely participate in element migration, transformation, and cycling in aquatic environments. Through competitive and cooperative interactions, microorganisms connect the cycles of carbon, nitrogen, sulfur, phosphorus, iron, and other elements within aquatic ecosystems. The exploration of the multifunctionality of microorganisms in aquatic systems through metagenomics and other methods can support the study of element cycling and interrelationships between elements. Our exploration of “Microbial Diversity and Function in Aquatic Environments” will be ongoing. In this Special Issue, therefore, advances in understanding the biodiversity, distribution, functional groups, and interactions between microorganisms and aquatic environments are welcomed and will be presented, striving to update and improve our knowledge of regional or global microbial diversity and function, biogeochemical cycles, biotechnology development, and the exploration of unknown biological resources in aquatic environments.

Dr. Xianglong Chen
Dr. Liang Guo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Life is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • aquatic environment
  • microbial diversity and function
  • element biogeochemical cycle
  • interaction between microorganisms and aquatic environments
  • metaomic approaches

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Published Papers (1 paper)

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Research

25 pages, 3878 KiB  
Article
Metagenomic Characterization of Microbiome Taxa Associated with Coral Reef Communities in North Area of Tabuk Region, Saudia Arabia
by Madeha O. I. Ghobashy, Amenah S. Al-otaibi, Basmah M. Alharbi, Dikhnah Alshehri, Hanaa Ghabban, Doha A. Albalawi, Asma Massad Alenzi, Marfat Alatawy, Faud A. Alatawi, Abdelazeem M. Algammal, Rashid Mir and Yussri M. Mahrous
Life 2025, 15(3), 423; https://doi.org/10.3390/life15030423 - 7 Mar 2025
Viewed by 1479
Abstract
The coral microbiome is highly related to the overall health and the survival and proliferation of coral reefs. The Red Sea’s unique physiochemical characteristics, such a significant north–south temperature and salinity gradient, make it a very intriguing research system. However, the Red Sea [...] Read more.
The coral microbiome is highly related to the overall health and the survival and proliferation of coral reefs. The Red Sea’s unique physiochemical characteristics, such a significant north–south temperature and salinity gradient, make it a very intriguing research system. However, the Red Sea is rather isolated, with a very diversified ecosystem rich in coral communities, and the makeup of the coral-associated microbiome remains little understood. Therefore, comprehending the makeup and dispersion of the endogenous microbiome associated with coral is crucial for understanding how the coral microbiome coexists and interacts, as well as its contribution to temperature tolerance and resistance against possible pathogens. Here, we investigate metagenomic sequencing targeting 16S rRNA using DNAs from the sediment samples to identify the coral microbiome and to understand the dynamics of microbial taxa and genes in the surface mucous layer (SML) microbiome of the coral communities in three distinct areas close to and far from coral communities in the Red Sea. These findings highlight the genomic array of the microbiome in three areas around and beneath the coral communities and revealed distinct bacterial communities in each group, where Pseudoalteromonas agarivorans (30%), Vibrio owensii (11%), and Pseudoalteromonas sp. Xi13 (10%) were the most predominant species in samples closer to coral (a coral-associated microbiome), with the domination of Pseudoalteromonas_agarivorans and Vibrio_owensii in Alshreah samples distant from coral, while Pseudoalteromonas_sp._Xi13 was more abundant in closer samples. Moreover, Proteobacteria such as Pseudoalteromonas, Pseudomonas and Cyanobacteria were the most prevalent phyla of the coral microbiome. Further, Saweehal showed the highest diversity far from corals (52.8%) and in Alshreah (7.35%) compared to Marwan (1.75%). The microbial community was less diversified in the samples from Alshreah Far (5.99%) and Marwan Far (1.75%), which had comparatively lower values for all indices. Also, Vibrio species were the most prevalent microorganisms in the coral mucus, and the prevalence of these bacteria is significantly higher than those found in the surrounding saltwater. These findings reveal that there is a notable difference in microbial diversity across the various settings and locales, revealing that geographic variables and coral closeness affect the diversity of microbial communities. There were significant differences in microbial community composition regarding the proximity to coral. In addition, there were strong positive correlations between genera Pseudoalteromonas and Vibrio in close-to-coral environments, suggesting that these bacteria may play a synergistic role in Immunizing coral, raising its tolerance towards environmental stress and overall coral health. Full article
(This article belongs to the Special Issue Microbial Diversity and Function in Aquatic Environments)
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