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Oceans
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Seagrass Ecosystems in a Changing World
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Seagrass Ecosystems in a Changing World

A special issue of Oceans (ISSN 2673-1924).

Deadline for manuscript submissions: closed (30 June 2021) | Viewed by 4026

Special Issue Editors

Dr. João Silva

E-Mail Website
Guest Editor
CCMAR—Centre of Marine Sciences, University of Algarve, 8005-139 Faro, Portugal
Interests: global change biology; ocean acidification; seagrasses; coralline algae; ecophysiology; calcification
Dr. Lázaro Marín-Guirao

E-Mail Website
Guest Editor
Seagras Ecology Group, Oceanographic Center of Murcia, Spanish Institute of Oceanography, Varadero, 30740 San Pedro del Pinatar, Murcia, Spain
Interests: the context of integrative seagrass ecology; capacity of marine plants; population, community and ecosystem analysis; ecophysiological/biochemical measurements; genetic and transcriptomic techniques

Special Issue Information

Dear colleague,

Climate change is introducing new pressures in marine ecosystems worldwide. Seawater chemistry is being altered by the increase of total dissolved inorganic carbon (Ci) and the decrease of pH, extreme weather events such as storms and marine heatwaves are ever more frequent and intense, and sea level is steadily rising. In this disturbing scenario, coastal marine ecosystems dominated by seagrasses are reacting at different levels, from the genes to the ecosystem. Nonetheless, very little is known about the potential effects that climate-change-associated stressors may have on seagrass biology and ecology, despite the fact that these plants are among the world's most productive marine ecosystems, with a very high ecological and economical importance.

This Special Issue welcomes contributions related to all aspects of climate change effects on seagrasses, particularly those related to the ecology, biology, and physiology of these marine macrophytes. Contributions based on innovative genomic, metabolomic, and proteomic tools are encouraged, as are those involving multilevel approaches, from genes to the whole-plant level. Studies addressing species interactions (herbivory, epiphytes, allelopathy) and the seagrass microbiome are also welcome.

Dr. João Silva
Dr. Lázaro Marín-Guirao
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 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. Oceans is an international peer-reviewed open access quarterly 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 1600 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

  • climate change
  • seagrasses
  • ecology
  • local and global stressors

Published Papers (1 paper)

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Research

13 pages, 1124 KiB  
Article
Heatwave Effects on the Photosynthesis and Antioxidant Activity of the Seagrass Cymodocea nodosa under Contrasting Light Regimes
by Monya M. Costa, João Silva, Isabel Barrote and Rui Santos
Oceans 2021, 2(3), 448-460; https://0-doi-org.brum.beds.ac.uk/10.3390/oceans2030025 - 25 Jun 2021
Cited by 10 | Viewed by 3106
Abstract
Global climate change, specifically the intensification of marine heatwaves, affect seagrasses. In the Ria Formosa, saturating light intensities may aggravate heatwave effects on seagrasses, particularly during low spring tides. However, the photophysiological and antioxidant responses of seagrasses to such extreme events are poorly [...] Read more.
Global climate change, specifically the intensification of marine heatwaves, affect seagrasses. In the Ria Formosa, saturating light intensities may aggravate heatwave effects on seagrasses, particularly during low spring tides. However, the photophysiological and antioxidant responses of seagrasses to such extreme events are poorly known. Here, we evaluated the responses of Cymodocea nodosa exposed at 20 °C and 40 °C and 150 and 450 μmol quanta m−2 s−1. After four-days, we analyzed (a) photosynthetic responses to irradiance, maximum photochemical efficiency (Fv/Fm), the effective quantum yield of photosystem II (ɸPSII); (b) soluble sugars and starch; (c) photosynthetic pigments; (d) antioxidant responses (ascorbate peroxidase, APX; oxygen radical absorbance capacity, ORAC, and antioxidant capacity, TEAC); (d) oxidative damage (malondialdehyde, MDA). After four days at 40 °C, C. nodosa showed relevant changes in photosynthetic pigments, independent of light intensity. Increased TEAC and APX indicated an “investment” in the control of reactive oxygen species levels. Dark respiration and starch concentration increased, but soluble sugar concentrations were not affected, suggesting higher CO2 assimilation. Our results show that C. nodosa adjusts its photophysiological processes to successfully handle thermal stress, even under saturating light, and draws a promising perspective for C. nodosa resilience under climate change scenarios. Full article
(This article belongs to the Special Issue Seagrass Ecosystems in a Changing World)
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