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Microorganisms
Special Issues
Aquatic Microbial Interaction between Microbial Communities and Biogeochemical Cycles
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Aquatic Microbial Interaction between Microbial Communities and Biogeochemical Cycles

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

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 3961

Special Issue Editor

Prof. Dr. Xiaobo Liu

E-Mail Website
Guest Editor
School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Interests: microbiomes; photosynthetic bacteria; microalgae; biogeochemical cycles; microbial interaction
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Aquatic microbiomes are vital components of aquatic ecosystems. Their interactions and metabolism play a significant role in shaping microbial community dynamics and ecosystem-scale biogeochemical processes. In aquatic environments, microbial communities are responsible for the cycling of nutrients such as carbon, nitrogen, and phosphorus. For example, photosynthetic bacteria and algae use sunlight to convert carbon dioxide into organic carbon, which is then used by heterotrophic bacteria to obtain energy through respiration. Nitrogen is cycled through a variety of microbial processes, including nitrogen fixation, nitrification, and denitrification. These processes are mediated by different groups of microbes, each with its own specific metabolic capabilities.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  1. The participation of aquatic microorganisms in the cycle of elements such as carbon, nitrogen and sulfur.
  2. The ecological effects of aquatic microorganisms participating in the emission of greenhouse gases.
  3. New pathways and new regulatory mechanisms for the conversion and metabolism of aquatic microbial substances and energy.

I look forward to receiving your contributions.

Prof. Dr. Xiaobo Liu
Guest Editor

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. Microorganisms 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 2700 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 microbial community
  • aquaculture
  • nutrient cycling
  • photosynthetic bacteria
  • algae

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

20 pages, 3690 KiB  
Article
Prokaryote Distribution Patterns along a Dissolved Oxygen Gradient Section in the Tropical Pacific Ocean
by Peiqing He, Huan Wang, Jie Shi, Ming Xin, Weimin Wang, Linping Xie, Qinsheng Wei, Mu Huang, Xuefa Shi, Yaqin Fan and Hao Chen
Microorganisms 2023, 11(9), 2172; https://doi.org/10.3390/microorganisms11092172 - 28 Aug 2023
Cited by 2 | Viewed by 1744
Abstract
Oceanic oxygen levels are decreasing significantly in response to global climate change; however, the microbial diversity and ecological functional responses to dissolved oxygen (DO) in the open ocean are largely unknown. Here, we present prokaryotic distribution coupled with physical and biogeochemical variables and [...] Read more.
Oceanic oxygen levels are decreasing significantly in response to global climate change; however, the microbial diversity and ecological functional responses to dissolved oxygen (DO) in the open ocean are largely unknown. Here, we present prokaryotic distribution coupled with physical and biogeochemical variables and DO gradients from the surface to near the bottom of a water column along an approximately 12,000-km transect from 13° N to 18° S in the Tropical Pacific Ocean. Nitrate (11.42%), temperature (10.90%), pH (10.91%), silicate (9.34%), phosphate (4.25%), chlorophyll a (3.66%), DO (3.50%), and salinity (3.48%) significantly explained the microbial community variations in the studied area. A distinct microbial community composition broadly corresponding to the water masses formed vertically. Additionally, distinct ecotypes of Thaumarchaeota and Nitrospinae belonging to diverse phylogenetic clades that coincided with specific vertical niches were observed. Moreover, the correlation analysis revealed large-scale natural feedback in which chlorophyll a (organic matter) promoted Thaumarchaeotal biomass at depths that subsequently coupled with Nitrospina, produced and replenished nitrate for phytoplankton productivity at the surface. Low DO also favored Thaumarchaeota growth and fueled nitrate production. Full article
(This article belongs to the Special Issue Aquatic Microbial Interaction between Microbial Communities and Biogeochemical Cycles)
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15 pages, 5488 KiB  
Article
Effects of Algal Extracellular Polysaccharides on the Formation of Filamentous Manganese Oxide Particles in the Near-Bottom Layer of Lake Biwa
by Seiko Furuta, Hisato Ikegaya, Megumu Fujibayashi, Hideki Hashimoto, Shiro Suzuki, Kunihiro Okano, Satoshi Ichise and Naoyuki Miyata
Microorganisms 2023, 11(7), 1814; https://doi.org/10.3390/microorganisms11071814 - 15 Jul 2023
Cited by 3 | Viewed by 1664
Abstract
Filamentous manganese (Mn) oxide particles, which occur in the suboxic zone of stratified waterbodies, are important drivers of diverse elemental cycles. These particles are considered to be bacteriogenic; despite the importance of biogeochemical implications, however, the environmental factor responsible for their formation has [...] Read more.
Filamentous manganese (Mn) oxide particles, which occur in the suboxic zone of stratified waterbodies, are important drivers of diverse elemental cycles. These particles are considered to be bacteriogenic; despite the importance of biogeochemical implications, however, the environmental factor responsible for their formation has not been identified. The aim of this study was to demonstrate the involvement of algal extracellular polysaccharides in Mn oxide particle formation. Based on this study of laboratory cultures of a model Mn(II)-oxidizing bacterium, the supply of algal extracellular mucilage was shown to stimulate Mn(II) oxidation and thus the production of filamentous Mn oxide particles. This observation was consistent with the results obtained for naturally occurring particles collected from a near-bottom layer (depth of approximately 90 m) in the northern basin of Lake Biwa, Japan, that is, most Mn particles resembling δ-MnO2 were associated with an extracellular mucilage-like gelatinous matrix, which contained dead algal cells and was lectin-stainable. In the lake water column, polysaccharides produced by algal photosynthesis sank to the bottom layer. The analysis of the quality of water samples, which have been collected from the study site for 18 years, reveals that the annual average total phytoplankton biovolume in the surface layer correlates with the density of filamentous Mn particles in the near-bottom layer. Among different phytoplankton species, green algae appeared to be the key species. The results of this study suggest that algal extracellular polysaccharides serve as an important inducer for the formation of filamentous Mn oxide particles in the near-bottom layer of the northern basin of Lake Biwa. Full article
(This article belongs to the Special Issue Aquatic Microbial Interaction between Microbial Communities and Biogeochemical Cycles)
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