Interactive effects of global warming and eutrophication on a fast-growing Mediterranean seagrass

Marine Environmental Research
Y OntoriaMarta Pérez

Abstract

Coastal ecosystems, such as seagrasses, are subjected to local (e.g. eutrophication) and global (e.g. warming) stressors. While the separate effects of warming and eutrophication on seagrasses are relatively well known, their joint effects remain largely unstudied. In order to fill this gap, and using Cymodocea nodosa as a model species, we assessed the joint effects of warming (three temperatures, 20 °C, 30 °C and 35 °C) with two potential outcomes of eutrophication: (i) increase in nutrients concentration in the water column (30 and 300 μM), and (ii) organic enrichment in the sediment). Our results confirm that temperature in isolation clearly affects plant performance; while plants exposed to 30 °C performed better than control plants, plants exposed to 35 °C showed clear symptoms of deterioration (e.g. decline of photosynthetic capacity, increase of incidence of necrotic tissue). Plants were unaffected by high ammonium concentrations; however, organic enrichment of sediment had deleterious effects on plant function (photosynthesis, growth, demographic balance). Interestingly, these negative effects were exacerbated by increased temperature. Our findings indicate that in addition to the possibility of the persistence of C. n...Continue Reading

Citations

Jan 20, 2021·Journal of Environmental Management·Regina Temino-BoesRabindranarth Romero-Lopez
Jan 11, 2021·Marine Environmental Research·Andria OstrowskiMichael Sievers
May 21, 2021·Biological Reviews of the Cambridge Philosophical Society·Hung Manh NguyenGabriele Procaccini
May 25, 2021·Evolutionary Applications·Jessica PazzagliaGabriele Procaccini
Jun 6, 2021·The Science of the Total Environment·Wenhao ChenNicholas M Holden
Nov 20, 2021·Frontiers in Plant Science·Agustín Moreira-SaporitiMirta Teichberg

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