Special Issue "Characterization of Organic Matter in Marine and Freshwater Environment"

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Biodiversity and Ecosystem Functioning".

Deadline for manuscript submissions: 30 November 2021.

Special Issue Editors

Dr. Slađana Strmečki Kos
E-Mail Website
Guest Editor
Division for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia
Interests: organic matter; biogeochemistry; molecular interaction; complexation; electrochemical analysis
Dr. Blaženka Gašparović
E-Mail Website
Co-Guest Editor
Division for Marine and Environmental Research, Institute Ruđer Bošković, Zagreb, Croatia
Interests: marine organic matter; lipid biogeochemistry; algae; phytoplankton; fatty acids
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Special Issue Information

Dear Colleagues,

Organic matter in marine and freshwater environments has a complex chemical composition and physico-chemical properties that depend on its source, interactions, and possibilities for biogeochemical transformation and preservation. The influence of the living world, from the smallest phytoplankton and microbes to larger zooplankton, as well as the geology of the aquatic system are crucial to understanding the role of organic matter in water and the possible role of oceans, seas, and lakes in carbon sequestration. Organic molecules play a role in the distribution of carbon by influencing the global carbon cycle and the associated climate changes. On the other hand, organic matter changes when exposed to different types of environmental stressors, such as changes in temperature, pH, and salinity, anthropogenic pollution, and atmospheric contributions. Changes in organic matter in waters have an impact on other chemical components of water and thus indirectly affect water quality. Qualitative and quantitative characterization of heterogeneous natural organic matter remains a major challenge for chemists and oceanographers around the world and requires the development of new separation methods and highly sensitive analytical methods.

The aim of this Special Issue is to publish high-quality original research papers and review articles addressing recent advances in the characterization of global or local natural organic matter, the use of new methods, and/or developments in monitoring.

Dr. Slađana Strmečki Kos
Dr. Blaženka Gašparović
Guest Editors

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 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.


  • organic matter;
  • biogeochemistry;
  • molecular composition;
  • phytoplankton;
  • pollution;
  • climate change;
  • interaction;
  • analytical methods;
  • water quality;
  • monitoring.

Published Papers (1 paper)

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Characterization of Marine-Surface-Dissolved Organic Matter via Amino Acid Enantiomers and Its Implications Based on Diel and Seasonal Observations
Water 2021, 13(5), 685; https://doi.org/10.3390/w13050685 - 03 Mar 2021
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Due to the essential roles of dissolved organic matter (DOM) in both microbiol food loop and marine carbon cycling, changes in marine DOM composition have an important impact on the marine ecosystem and carbon cycling. In October 2014 and June 2015, two field [...] Read more.
Due to the essential roles of dissolved organic matter (DOM) in both microbiol food loop and marine carbon cycling, changes in marine DOM composition have an important impact on the marine ecosystem and carbon cycling. In October 2014 and June 2015, two field investigations for the DOM in the upper 200 m were conducted in the slope region of the northern South China Sea to characterize the DOM composition via amino acid enantiomers. In June, our sampling locations were under upwelling impact induced by an eddy-pair event, whereas in October there were no eddies. High-frequency sampling (a few hours interval) over 24 h reveals that the variability of the amino acid carbon yield (min. 0.2%) and the D/L alanine ratio (min. 0.02) is larger than its corresponding analytical and propagated errors, suggesting solid short-term changes for these two molecular-based indicators. Section samples from June showed a lower D/L alanine ratio (0.43 vs. 0.53) and a GABA mol% (1.0% vs. 1.6%) relative to the section samples from October, suggesting that DOM in June is more fresh (less degraded) compared to that in October. A higher serine mol% (19.5% vs. 13.2%) and lower D/L serine ratio (0.06 vs. 0.24) from the diel observation in June relative to October further indicates that phytoplankton, rather than bacteria, plays an more important role in DOM composition alternation. This is consistent with the higher phytoplankton biomass found in June, promoted by the eddy-pair. Full article
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