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Toxins
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Interactive Effects of Climate Change and Toxins in Marine Organisms:...
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Interactive Effects of Climate Change and Toxins in Marine Organisms: Current Knowledge and Research Gaps

A special issue of Toxins (ISSN 2072-6651). This special issue belongs to the section "Marine and Freshwater Toxins".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 4355

Special Issue Editors

Dr. Ana Luísa Maulvault

E-Mail Website
Guest Editor
1. Portuguese Institute of the Sea and Atmosphere - IPMA, Avenida de Brasília, 1449-006 Lisbon, Portugal
2. Associate Laboratory i4HB - Institute for Health and Bioeconomy, UCIBIO - Unit on Applied Molecular Biosciences, Department of Chemistry, School of Science and Technology, NOVA University Lisbon, 2819-516 Caparica, Portugal
Interests: climate change effects on marine organisms’ welfare and seafood safety; emerging contaminants; marine ecotoxicology and physiology; development of eco-innovative adaptation strategies to overcome pollution and climate change impacts in the aquaculture sector
Dr. Pedro Reis Costa

E-Mail Website
Guest Editor
Laboratório de Fitoplâncton, Departamento do Mar e Recursos Marinhos, Instituto Português do Mar e da Atmosfera, Rua Alfredo Magalhães Ramalho, 6, 1449-006 Lisboa, Portugal
Interests: harmful algal blooms; marine toxins
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The increase in the frequency and intensity of harmful algal blooms (HABs) has been associated with changes in global conditions, which may constitute a significant threat to marine organisms frequently exposed to many other pressures, ranging from anthropogenic contamination to pathogens and parasites, as well as variations in the abiotic environmental conditions. The impacts of climate change are likely to substantially alter the prevailing environmental conditions of certain regions of the planet, exacerbating the ecological problems in sensitive coastal ecosystems. Changes in organisms’ behavior and immune response, diminished metabolic rate and energy available for somatic metabolism and growth may result from exposure to marine toxins derived from HABs. Still, the extent to which climate change impacts can interact with toxins’ bioaccumulation and toxicity to both marine biota (via direct exposure) and humans (via seafood consumption) has received less attention. This Special Issue aims to promote discussion on current challenges and advances in the study of the combined effects of HAB toxins, anthropogenic pressures and climate change. Reports focused on empirical, field, and observational works are welcomed, as are reviews of the current state of the art and new technological advances for the determination of biotoxins (especially emerging ones) in marine matrices.

Dr. Ana Luísa Maulvault
Dr. Pedro Reis Costa
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 double-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Toxins 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

  • marine toxins
  • climate change
  • toxins metabolism
  • ecotoxicology
  • seafood safety

Published Papers (2 papers)

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Research

14 pages, 2267 KiB  
Article
Gymnodinium catenatum Paralytic Shellfish Toxin Production and Photobiological Responses under Marine Heat Waves
by Vanessa M. Lopes, Mélanie Court, Martim Costa Seco, Francisco O. Borges, Bernardo Vicente, Sandra Lage, Ana Catarina Braga, Bernardo Duarte, Catarina Frazão Santos, Ana Amorim, Pedro Reis Costa and Rui Rosa
Toxins 2023, 15(2), 157; https://doi.org/10.3390/toxins15020157 - 14 Feb 2023
Viewed by 1934
Abstract
Marine heatwaves (MHWs) have doubled in frequency since the 1980s and are projected to be exacerbated during this century. MHWs have been shown to trigger harmful algal blooms (HABs), with severe consequences to marine life and human populations. Within this context, this study [...] Read more.
Marine heatwaves (MHWs) have doubled in frequency since the 1980s and are projected to be exacerbated during this century. MHWs have been shown to trigger harmful algal blooms (HABs), with severe consequences to marine life and human populations. Within this context, this study aims to understand, for the first time, how MHWs impact key biological and toxicological parameters of the paralytic shellfish toxin (PST) producer Gymnodinium catenatum, a dinoflagellate inhabiting temperate and tropical coastal waters. Two MHW were simulated—category I (i.e., peak: 19.9 °C) and category IV (i.e., peak: 24.1 °C)—relative to the estimated baseline in the western coast of Portugal (18.5 °C). No significant changes in abundance, size, and photosynthetic efficiency were observed among treatments. On the other hand, chain-formation was significantly reduced under category IV MHW, as was PSP toxicity and production of some PST compounds. Overall, this suggests that G. catenatum may have a high tolerance to MHWs. Nevertheless, some sublethal effects may have occurred since chain-formation was affected, suggesting that these growth conditions may be sub-optimal for this population. Our study suggests that the increase in frequency, intensity, and duration of MHWs may lead to reduced severity of G. catenatum blooms. Full article
(This article belongs to the Special Issue Interactive Effects of Climate Change and Toxins in Marine Organisms: Current Knowledge and Research Gaps)
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23 pages, 6985 KiB  
Article
Impacts of Climate Change on the Biogeography of Three Amnesic Shellfish Toxin Producing Diatom Species
by Francisco O. Borges, Vanessa M. Lopes, Catarina Frazão Santos, Pedro Reis Costa and Rui Rosa
Toxins 2023, 15(1), 9; https://doi.org/10.3390/toxins15010009 - 22 Dec 2022
Cited by 2 | Viewed by 1911
Abstract
Harmful algal blooms (HABs) are considered one of the main risks for marine ecosystems and human health worldwide. Climate change is projected to induce significant changes in species geographic distribution, and, in this sense, it is paramount to accurately predict how it will [...] Read more.
Harmful algal blooms (HABs) are considered one of the main risks for marine ecosystems and human health worldwide. Climate change is projected to induce significant changes in species geographic distribution, and, in this sense, it is paramount to accurately predict how it will affect toxin-producing microalgae. In this context, the present study was intended to project the potential biogeographical changes in habitat suitability and occurrence distribution of three key amnesic shellfish toxin (AST)—producing diatom species (i.e., Pseudo-nitzschia australis, P. seriata, and P. fraudulenta) under four different climate change scenarios (i.e., RCP-2.6, 4.5, 6.0, and 8.5) up to 2050 and 2100. For this purpose, we applied species distribution models (SDMs) using four abiotic predictors (i.e., sea surface temperature, salinity, current velocity, and bathymetry) in a MaxEnt framework. Overall, considerable contraction and potential extirpation were projected for all species at lower latitudes together with projected poleward expansions into higher latitudes, mainly in the northern hemisphere. The present study aims to contribute to the knowledge on the impacts of climate change on the biogeography of toxin-producing microalgae species while at the same time advising the correct environmental management of coastal habitats and ecosystems. Full article
(This article belongs to the Special Issue Interactive Effects of Climate Change and Toxins in Marine Organisms: Current Knowledge and Research Gaps)
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