Effects of high temperature and marine heat waves on seagrasses: Is warming affecting the nutritional value of Posidonia oceanica?

Patrizia Stipcich, Pedro Beca-Carretero, Xosé Antón Álvarez-Salgado, Eugenia T. Apostolaki, Niki Chartosia, Pavlos Theofilos Efthymiadis, Carlos E. Jimenez, Gabriella La Manna, Arianna Pansini, Elena Principato, Vasilis Resaikos, Dagmar B. Stengel, Giulia Ceccherelli

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Primary producers nutritional content affects the entire food web. Here, changes in nutritional value associated with temperature rise and the occurrence of marine heat waves (MHWs) were explored in the endemic Mediterranean seagrass Posidonia oceanica. The variability of fatty acids (FAs) composition and carbon (C) and nitrogen (N) content were examined during summer 2021 from five Mediterranean sites located at the same latitude but under different thermal environments. The results highlighted a decrease in unsaturated FAs and C/N ratio and an increase of monounsaturated FA (MUFA) and N content when a MHW occurred. By contrast, the leaf biochemical composition seems to be adapted to local water temperature since only few significant changes in MUFA were found and N and C/N had an opposite pattern compared to when a MHW occurs. The projected increase in temperature and frequency of MHW suggest future changes in the nutritional value and palatability of leaves.

Original languageEnglish
Article number105854
JournalMarine Environmental Research
Volume184
DOIs
StatePublished - 1 Feb 2023
Externally publishedYes

Keywords

  • Bioindicators
  • Carbon
  • Climate change
  • Fatty acids
  • Mediterranean sea
  • Nitrogen
  • Nutrients

ASJC Scopus subject areas

  • Pollution
  • Aquatic Science
  • Oceanography

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