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Impacts of Climate and Human Activities on the Biogeochemical Cycles...
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Impacts of Climate and Human Activities on the Biogeochemical Cycles in Coastal Areas

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

Deadline for manuscript submissions: 31 December 2024 | Viewed by 1486

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 Issue Information

Dear Colleagues,

Coastal ocean is the transition zone between land and ocean that receives input from riverine discharge, atmospheric deposition and is physically related to the open ocean. It is one of the most dynamic and complex regions in the world and is 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 biogeochemical processes in coastal zones will improve our understanding on how these dynamic areas will respond under these threats, as well as providing us with background information to predict future changes. This Special Issue will focus on the various biogeochemical cycles in coastal ocean, with an 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 of studies (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 contribute to the literature in the fields of environmental monitoring, aquatic sciences, and oceanography.

Thank you,

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 (2 papers)

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Research

16 pages, 5328 KiB  
Article
Model-Based Analysis of the Oxygen Budget in the Black Sea Water Column
by Matvey Novikov, Svetlana Pakhomova, Anfisa Berezina and Evgeniy Yakushev
Water 2024, 16(17), 2380; https://doi.org/10.3390/w16172380 - 24 Aug 2024
Viewed by 493
Abstract
Climate change and anthropogenic impacts drastically affect the biogeochemical regime of the Black Sea, which contains the largest volume of sulphidic water in the world. The Sea’s oxygen inventory depends on vertical mixing that transports dissolved oxygen (DO) from the upper euphotic layer [...] Read more.
Climate change and anthropogenic impacts drastically affect the biogeochemical regime of the Black Sea, which contains the largest volume of sulphidic water in the world. The Sea’s oxygen inventory depends on vertical mixing that transports dissolved oxygen (DO) from the upper euphotic layer to deeper layers and on dissolved oxygen consumption for the oxidation of organic matter (OM) and reduced species of S, Fe, and Mn. Here we use a vertical one-dimensional transport model, 2DBP, forced by Copernicus data, that was coupled with the FABM-family N-P-Si-C-O-S-Mn-Fe Bottom RedOx Model BROM. The research objective of this study was to analyze the oxygen budget in the upper 350 m of the Sea and demonstrate the role of the parameterization of the acceleration of the sinking of particles covered by precipitated Mn(IV). The analysis of the oxygen budget revealed distinct patterns in oxygen consumption within different depths. In the oxic zone, the primary sink for DO is the mineralization of organic matter, whereas in the suboxic zone, dissolved Mn(II) oxidation becomes the predominant sink. The produced Mn(IV) sinks down and reacts with hydrogen sulphide several meters below, making possible the existence of the suboxic layer without detectable concentrations of DO and H2S. Full article
(This article belongs to the Special Issue Impacts of Climate and Human Activities on the Biogeochemical Cycles in Coastal Areas)
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19 pages, 1983 KiB  
Article
Chemical Speciation and Preservation of Phosphorus in Sediments along the Southern Coast of Zhoushan Island
by Pei Sun Loh, Jianjie He, Shida Feng, Yijin Wang, Zengxuan Chen, Chuanyi Guo, Shuangyan He, Xue-Gang Chen, Ai-Min Jin, Yuxia Sun, Jiawang Chen, Jianru Zhao, Zhongqiao Li and Jianfang Chen
Water 2024, 16(16), 2225; https://doi.org/10.3390/w16162225 - 6 Aug 2024
Viewed by 749
Abstract
This study investigated the distribution of sedimentary phosphorus (P) species along an area of a rapid current at the southern coast of Zhoushan Island. The objective of this study was to improve the understanding of P cycling in a zone of rapid water [...] Read more.
This study investigated the distribution of sedimentary phosphorus (P) species along an area of a rapid current at the southern coast of Zhoushan Island. The objective of this study was to improve the understanding of P cycling in a zone of rapid water cycling. Results showed that the average percentage of each P form to total P (TP) was in the following order: apatite P (Ca-P; 52%) was found in the most abundant, followed by organic P (OP; 16%), exchangeable-P (Ex-P; 14%), detrital P (De-P; 11%), and iron-bound P (Fe-P; 7%). Ca-P showed a trend of an increasing concentration from a location at the west (ZS1 has mean Ca-P = 45.6 mg kg−1) toward the east (ZS2 has mean Ca-P = 82.69 mg kg−1) and south-east (ZS3 has mean Ca-P = 82.17 mg kg−1); De-P also increased from 15.12 mg kg−1 at ZS1 to 22.53 mg kg−1 at ZS2 and 27.45 mg kg−1 at ZS3, but the three bioavailable P species, OP, Ex-P, and Fe-P, decreased from the west toward the east of the coastal area. Results along the cores showed the occurrences of sediment P adsorption and release throughout the time span from the 1930s to the present, with an overall trend of decreasing Ca-P and TP from the bottom to surface sediments. There was a tendency of Ca-P formation at the expense of Ex-P and OP release during transport and organic matter decomposition. The likely impact of climate change in the coastal zone would be an increased temperature resulting in elevated organic matter decomposition and P release. Full article
(This article belongs to the Special Issue Impacts of Climate and Human Activities on the Biogeochemical Cycles in Coastal Areas)
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