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Water
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Biogeochemical Cycles in Vulnerable Coastal and Marine Environment
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Biogeochemical Cycles in Vulnerable Coastal and Marine Environment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Oceans and Coastal Zones".

Deadline for manuscript submissions: 25 August 2025 | Viewed by 118

Special Issue Editor

Dr. Pei Sun Loh

E-Mail Website
Guest Editor
Ocean College, Zhejiang University, Zhoushan 316021, China
Interests: biogeochemistry; carbon cycle; blue carbon ecosystems; climate change; human activities
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Coastal oceans are the transition zones between land and ocean that receive input from riverine discharge and atmospheric deposition, and they are physically related to the open ocean. They are some of the most dynamic and complex regions in the world, and are influenced by various biogeochemical processes. Coastal zones are increasingly threatened by climate change and human activities. Thus, understanding how climate change and human activities affect the bio-geochemical processes of coastal zones will improve our understanding of how these dynamic areas will respond to these threats and provide us with background information to predict future changes. This Special Issue will focus on the various biogeochemical cycles in coastal oceans, with emphasis on the impacts of climate change and human activities on the dynamic coasts, followed by suggestions on how to overcome these problems. We welcome papers from various fields, including oceanography, biogeochemistry, hydrology, paleoceanography, etc., and covering various coastal areas, such as estuaries, coastal wetlands (including marshes and mangroves), coral reefs, upwelling areas, etc. This Special Issue will be situated in the fields of environmental monitoring, aquatic sciences, and oceanography.

Dr. Pei Sun Loh
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. Water is an international peer-reviewed open access semimonthly 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

  • biogeochemistry
  • aquatic environments
  • pollution
  • nutrient cycle
  • carbon dynamics
  • coastal zones

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Published Papers (1 paper)

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9 pages, 1246 KiB  
Brief Report
The Role of Abundant Organic Macroaggregates in Planktonic Metabolism in a Tropical Bay
by Marcelo Friederichs Landim de Souza and Guilherme Camargo Lessa
Water 2025, 17(13), 1967; https://doi.org/10.3390/w17131967 - 30 Jun 2025
Abstract
Abundant large organic aggregates, which form mucous webs up to a few decimeters in length, have been observed in Baía de Todos os Santos (BTS), northeastern Brazil. This communication presents preliminary results from field (February 2015) and laboratory (June 2015) experiments that aimed [...] Read more.
Abundant large organic aggregates, which form mucous webs up to a few decimeters in length, have been observed in Baía de Todos os Santos (BTS), northeastern Brazil. This communication presents preliminary results from field (February 2015) and laboratory (June 2015) experiments that aimed to determine preliminary values for respiration and near-maximum photosynthesis and the impact of macroaggregates on respiration rates. The experiments included the determination of respiration in controls, with the mechanical removal and addition of macroaggregates. The field experiment during a flood tide presented the lowest respiration rate (−7.0 ± 0.7 µM L−1 d−1), average net primary production (8.9 ± 4.5 µM L−1 d−1), and gross primary production (16.0 ± 10 µM L−1 d−1), with a ratio of gross primary production to respiration of 2.3. The control experiments during an ebb tide showed a mean respiration rate of 8.7 ± 2.3 µM L−1 d−1, whereas, after macroaggregate removal, this was 9.5 ± 4.5 µM L−1 d−1. In the laboratory experiments, the control sample respiration rate of 18.4 ± 1.4 µM L−1 d−1 was slightly increased to 20.6 ± 0.1 µM L−1 d−1 after aggregate removal. The addition of aggregates to the control sample increased the respiration rate by approximately 3-fold, to 56.5 ± 4.8 µM L−1 d−1. These results indicate that macroaggregates could have an important role in pelagic and benthic respiration, as well as in the whole bay’s metabolism. Full article
(This article belongs to the Special Issue Biogeochemical Cycles in Vulnerable Coastal and Marine Environment)
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