Ecotoxicity Effects of Metals and Microplastics on Aquatic Organisms

A special issue of Life (ISSN 2075-1729). This special issue belongs to the section "Animal Science".

Deadline for manuscript submissions: 31 March 2025 | Viewed by 1469

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Guest Editor
Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Università di Palermo, 90128 Palermo, Italy
Interests: pollutants; environmental stressors; marine species; climate change; species vulnerabilities; resilience

Special Issue Information

Dear Colleagues,

In recent years, a wide range of anthropogenic contaminants have been released into aquatic ecosystems as a consequence of human activity, including such sources as industrial effluents, agricultural activities, urban waste, and increased urbanization. The aquatic biota is experiencing co-occurring climate change and pollution, especially in coastal areas and around urban zones, influencing the normal function of aquatic ecosystems. Metals and plastic products are widely used in human activities and are subsequently mostly released into the environment via wastewater or other pathways, posing serious threats to the aquatic biota. Being non-biodegradable, metals tend to persist in nature, leading to bio-accumulation in food chains and interacting with cellular components and molecular targets, which causes severe environmental and health issues. Microplastics (MPs) are produced by the natural degradation processes of large plastic products or by anthropogenic activities. To protect aquatic species and safeguard their ecosystems, it is crucial to identify the main sources of metals and MPs, their fate in the aquatic environment, and their effects on aquatic organisms. Achieving this will provide more sustainable and lasting measures to protect aquatic life from anthropogenic activities. Thus, ecotoxicological studies are crucial in deepening our knowledge about how these pollutants affect aquatic organisms, alone or acting as mixtures, as well as their effect when interacting with the rising temperatures caused by climate change.

Therefore, in this Special Issue, we invite investigators to contribute with original research articles, as well as review articles, covering the effects of metals and MP pollution on aquatic organisms.

Dr. Chiara Martino
Guest Editor

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Keywords

  • aquatic organisms
  • emerging contaminants
  • metals
  • microplastics
  • defense strategies
  • cell stress
  • heavy metals
  • environmental stress
  • pollution
  • ecotoxicology

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Published Papers (2 papers)

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Research

11 pages, 4032 KiB  
Article
Between Life and Death: Sea Urchin Embryos Undergo Peculiar DNA Fragmentation after Exposure to Vanadium, Cadmium, Gadolinium, and Selenium
by Chiara Martino and Roberto Chiarelli
Life 2024, 14(10), 1296; https://doi.org/10.3390/life14101296 - 12 Oct 2024
Viewed by 565
Abstract
Exogenous DNA damage represents one of the most harmful outcomes produced by environmental, physical, or chemical agents. Here, a comparative analysis of DNA fragmentation was carried out on Paracentrotus lividus sea urchin embryos exposed to four common pollutants of the marine environment: vanadium, [...] Read more.
Exogenous DNA damage represents one of the most harmful outcomes produced by environmental, physical, or chemical agents. Here, a comparative analysis of DNA fragmentation was carried out on Paracentrotus lividus sea urchin embryos exposed to four common pollutants of the marine environment: vanadium, cadmium, gadolinium and selenium. Using the terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay, fragmented DNA was quantified and localized in apoptotic cells mapping whole-mount embryos. This is the first study reporting how different chemicals are able to activate distinctive apoptotic features in sea urchin embryos, categorized as follows: (i) cell-selective apoptosis, showing DNA fragmentation restricted to a subset of extremely damaged cells, acting as an embryo survival mechanism; or (ii) total apoptosis, with fragmented DNA widespread throughout the cells of the entire embryo, leading to its death. Also, this is the first report of the effects of Se exposure on P. lividus sea urchin embryos. These data confirm the TUNEL assay as the most suitable test to study DNA fragmentation in the sea urchin embryo model system. Taken together, this research highlights embryos’ ability to find alternative pathways and set physiological limits for development under stress conditions. Full article
(This article belongs to the Special Issue Ecotoxicity Effects of Metals and Microplastics on Aquatic Organisms)
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17 pages, 4742 KiB  
Article
Rapid and Accurate Ecotoxicological Assessment of Heavy Metals Using Cyprinus carpio Cells
by Yun Haeng Lee, Myeong Uk Kuk, Ji Ho Park, Hojun Lee, Haneur Lee, Moon Kyoung So, Jee Hee Yoon, Yoo Jin Lee, Duyeol Kim, Byeonghyeon So, Minseon Kim, Jihae Park, Taejun Han and Joon Tae Park
Life 2024, 14(9), 1119; https://doi.org/10.3390/life14091119 - 5 Sep 2024
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Abstract
Heavy metals have serious negative effects on various aquatic organisms, and therefore rapid and accurate ecotoxicological assessments of heavy metals are necessary. Fish-derived cells sensitive to heavy metals have been used as valuable tools for ecotoxicological assessments. However, this method requires a minimum [...] Read more.
Heavy metals have serious negative effects on various aquatic organisms, and therefore rapid and accurate ecotoxicological assessments of heavy metals are necessary. Fish-derived cells sensitive to heavy metals have been used as valuable tools for ecotoxicological assessments. However, this method requires a minimum toxicity treatment time of 96 h, which limits its use when rapid ecotoxicological assessments are required or ecotoxicological assessments of a large number of toxicants are performed. In this study, these limitations were overcome by adjusting parameters including the concentration of fetal bovine serum (FBS) in the medium and the treatment time of the toxicant. Specifically, we found that the maximum time for fish cells to remain unstarved was 6 h when using a medium containing 1% FBS. We applied both parameters to the ecotoxicological assessment (using a medium containing 1% FBS for the toxicity assessment and treating the toxicant for only 6 h). Surprisingly, these adjusted parameters allowed us to obtain faster and more accurate data than the traditional assessment. This improvement was due to the new assessment conditions that minimized the possibility that the growth-inducing effects of nutrients present in excess in the medium could interfere with the cellular response to the toxicant. The accuracy of this assessment was not limited to measuring the toxicity of heavy metals. In conclusion, we have established an ecotoxicity assessment that can generate rapid and accurate data on heavy metals. This new platform will become the cornerstone of rapid and accurate ecotoxicity assessments of heavy metals. Full article
(This article belongs to the Special Issue Ecotoxicity Effects of Metals and Microplastics on Aquatic Organisms)
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