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Microorganisms
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Marine Microorganisms in a Changing Ocean: From Single Species to...
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Marine Microorganisms in a Changing Ocean: From Single Species to Community Responses

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

Deadline for manuscript submissions: 15 August 2024 | Viewed by 3405

Special Issue Editors

Dr. Joana Barcelos e Ramos

E-Mail Website
Guest Editor
Group of Climate, Meteorology and Global Change, IITAA, University of the Azores, Rua Capitão d’Ávila, São Pedro, 9700-042 Angra do Heroísmo, Portugal
Interests: effects of global change namely increasing carbon dioxide on phytoplankton; their role in biogeochemical elemental cycling and potential feedbacks to climate; phytoplankton physiology; life cycles and mortality; ocean alkalinity enhancement
Dr. Susana Isabel Chaves Ribeiro

E-Mail Website
Guest Editor
Institute of Agricultural and Environmental Research and Technology (IITAA), University of the Azores, Angra do Heroísmo, Portugal
Interests: food science and technology; biochemistry; food safety; antimicrobials; microbiology; biotechnology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Marine microorganisms are essential for marine ecosystems and their responses to the changing climate. In this realm, photosynthetic unicellular plankton and heterotrophic bacteria establish close relationships with strong consequences to the equilibrium between the recycling of organic matter and its transport to the deep, ultimately affecting the feedback to the Earth’s climate. With the beginning of the industrial revolution, additional carbon is being injected into the atmosphere, and its concentration is expected to continue to increase, potentially reaching ~700 ppmv by 2100. To date, about one-third of these anthropogenic CO2 emissions have been taken by the ocean, decreasing oceanic pH (ocean acidification). Therefore, it is important to understand the potential effects of climate change and environmental degradation on marine microorganisms and their ecosystems. Understanding the species-specific mechanisms affected and potential shifts in community composition is the first step to determine feedbacks to climate. 

This Special Issue will provide a collection of articles that display how these microorganisms respond to global change as well as the mechanisms intrinsic to the equilibrium between phytoplankton CO2 fixation into organic carbon, surface ocean remineralization of organic matter, and the transport of organic carbon into the deep ocean.

As guest editors of this Special Issue we, Joana Barcelos e Ramos and Susana C. Ribeiro, invite you to submit research and review articles, as well as short communications that focus on the effects of global change on marine microorganisms, from the understanding of the mechanisms behind the observed responses to the diversity and functioning of plankton communities. Research areas may include (but are not limited to) the following:

CO2 effects; ocean acidification; global warming; marine phytoplankton; marine bacteria; marine plankton communities; biogeochemical feedbacks

We look forward to receiving your contributions.

Dr. Joana Barcelos e Ramos
Dr. Susana Isabel Chaves Ribeiro
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. 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

  • CO2 effects
  • ocean acidification
  • global warming
  • marine phytoplankton
  • marine bacteria
  • marine plankton communities
  • biogeochemical feedbacks

Published Papers (3 papers)

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Research

17 pages, 1108 KiB  
Article
Plasmid-Borne Biosynthetic Gene Clusters within a Permanently Stratified Marine Water Column
by Paraskevi Mara, David Geller-McGrath, Elizabeth Suter, Gordon T. Taylor, Maria G. Pachiadaki and Virginia P. Edgcomb
Microorganisms 2024, 12(5), 929; https://doi.org/10.3390/microorganisms12050929 - 02 May 2024
Viewed by 356
Abstract
Plasmids are mobile genetic elements known to carry secondary metabolic genes that affect the fitness and survival of microbes in the environment. Well-studied cases of plasmid-encoded secondary metabolic genes in marine habitats include toxin/antitoxin and antibiotic biosynthesis/resistance genes. Here, we examine metagenome-assembled genomes [...] Read more.
Plasmids are mobile genetic elements known to carry secondary metabolic genes that affect the fitness and survival of microbes in the environment. Well-studied cases of plasmid-encoded secondary metabolic genes in marine habitats include toxin/antitoxin and antibiotic biosynthesis/resistance genes. Here, we examine metagenome-assembled genomes (MAGs) from the permanently-stratified water column of the Cariaco Basin for integrated plasmids that encode biosynthetic gene clusters of secondary metabolites (smBGCs). We identify 16 plasmid-borne smBGCs in MAGs associated primarily with Planctomycetota and Pseudomonadota that encode terpene-synthesizing genes, and genes for production of ribosomal and non-ribosomal peptides. These identified genes encode for secondary metabolites that are mainly antimicrobial agents, and hence, their uptake via plasmids may increase the competitive advantage of those host taxa that acquire them. The ecological and evolutionary significance of smBGCs carried by prokaryotes in oxygen-depleted water columns is yet to be fully elucidated. Full article
(This article belongs to the Special Issue Marine Microorganisms in a Changing Ocean: From Single Species to Community Responses)
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18 pages, 1512 KiB  
Article
Short-Term Effects of Climate Change on Planktonic Heterotrophic Prokaryotes in a Temperate Coastal Lagoon: Temperature Is Good, Ultraviolet Radiation Is Bad, and CO2 Is Neutral
by Ana B. Barbosa, Benjamin A. Mosley, Helena M. Galvão and Rita B. Domingues
Microorganisms 2023, 11(10), 2559; https://doi.org/10.3390/microorganisms11102559 - 14 Oct 2023
Viewed by 810
Abstract
Planktonic heterotrophic prokaryotes (HProks) are a pivotal functional group in marine ecosystems and are highly sensitive to environmental variability and climate change. This study aimed to investigate the short-term effects of increasing carbon dioxide (CO2), ultraviolet radiation (UVR), and temperature on [...] Read more.
Planktonic heterotrophic prokaryotes (HProks) are a pivotal functional group in marine ecosystems and are highly sensitive to environmental variability and climate change. This study aimed to investigate the short-term effects of increasing carbon dioxide (CO2), ultraviolet radiation (UVR), and temperature on natural assemblages of HProks in the Ria Formosa coastal lagoon during winter. Two multi-stressor microcosm experiments were used to evaluate the isolated and combined effects of these environmental changes on HProk abundance, production, growth, and mortality rates. The isolated and combined effects of increased CO2 on HProks were not significant. However, HProk production, cellular activity, instantaneous growth rate, and mortality rate were negatively influenced by elevated UVR and positively influenced by warming. Stronger effects were detected on HProk mortality in relation to specific growth rate, leading to higher HProk net growth rates and abundance under elevated UVR and lower values under warming conditions. Full article
(This article belongs to the Special Issue Marine Microorganisms in a Changing Ocean: From Single Species to Community Responses)
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22 pages, 6358 KiB  
Article
Primary Production in the Kara, Laptev, and East Siberian Seas
by Soohyun Kim, Kwanwoo Kim, Naeun Jo, Hyo-Keun Jang, So-Hyun Ahn, Janghan Lee, Howon Lee, Sanghoon Park, Dabin Lee, Dean A. Stockwell, Terry E. Whitledge and Sang-Heon Lee
Microorganisms 2023, 11(8), 1886; https://doi.org/10.3390/microorganisms11081886 - 26 Jul 2023
Viewed by 995
Abstract
Understanding of the primary production of phytoplankton in the Kara Sea (KS), the Laptev Sea (LS), and the East Siberian Sea (ESS) remains limited, despite the recognized importance of phytoplankton in the Arctic Ocean. To address this knowledge gap, we conducted three NABOS [...] Read more.
Understanding of the primary production of phytoplankton in the Kara Sea (KS), the Laptev Sea (LS), and the East Siberian Sea (ESS) remains limited, despite the recognized importance of phytoplankton in the Arctic Ocean. To address this knowledge gap, we conducted three NABOS (Nansen and Amundsen Basins Observational System) expeditions in 2013, 2015, and 2018 to measure in situ primary production rates using a 13C-15N dual-tracer method and examine their major controlling factors. The main goals in this study were to investigate regional heterogeneity in primary production and derive its contemporary ranges in the KS, LS, and ESS. The daily primary production rates in this study (99 ± 62, 100 ± 77, and 56 ± 35 mg C m−2 d−1 in the KS, LS, and ESS, respectively) are rather different from the values previously reported in each sea mainly because of spatial and regional differences. Among the three seas, a significantly lower primary production rate was observed in the ESS in comparison to those in the KS and LS. This is likely mainly because of regional differences in freshwater content based on the noticeable relationship (Spearman, rs = −0.714, p < 0.05) between the freshwater content and the primary production rates observed in this study. The contemporary ranges of the annual primary production based on this and previous studies are 0.96–2.64, 0.72–50.52, and 1.68–16.68 g C m−2 in the KS, LS, and ESS, respectively. Further intensive field measurements are warranted to enhance our understanding of marine microorganisms and their community-level responses to the currently changing environmental conditions in these poorly studied regions of the Arctic Ocean. Full article
(This article belongs to the Special Issue Marine Microorganisms in a Changing Ocean: From Single Species to Community Responses)
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