Impacts of ocean acidification on the Mediterranean seagrass Posidonia oceanica and its epiphytic community
| Type | : | COM |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Oui |
| Statut de publication | : | Publié |
| Année de publication | : | 2015 |
| Lieu de publication | : | - |
| Titre de la conférence | : | 2015 Aquatic Sciences Meeting |
| Lieu de la conférence | : | Granada |
| Année de la conférence | : | 2015 |
| Date de début | : | 22/02/2015 |
| Date de fin | : | 27/02/2015 |
| Titre du proceeding | : | - |
| Editeur de presse | : | - |
| Volume | : | - |
| Fascicule | : | - |
| Pages | : | |
| Auteurs (6) | : | COX Tracy,erin GATTUSO Jean-pierre DIAZ-CASTANEDA Victoria DELILLE Jeremy SCHENONE Stefano GAZEAU Frederic |
| Editeurs scientifiques (0) | : | |
| DOI | : | - |
| URL | : | - |
| Abstract | : | Posidonia oceanica is the dominant seagrass that provides important ecosystem services in the Mediterranean Sea. Ocean acidification could impact this species and its epiphytic community in the future. Shoots of P. oceanica were exposed in the laboratory to 3 levels of pH during 5 weeks (ambient: 8.1, 7.8 and 7.4, on the total scale). On 3 occasions, net primary production, respiration, and net calcification were estimated based on incubations conducted in the light and dark. While shoot respiration was unaffected by pH, net primary production was significantly higher at 7.4 than at 7.8 and 8.1. In contrast, net calcification decreased significantly at 7.8 and 7.4 and was negative (net dissolution) at 7.4 (undersaturated conditions with respect to aragonite). The percent cover of epiphyte and calcified biomass at the end of the experiment decreased as a function of decreasing pH, largely due to a partial loss of crustose coralline algae at 7.8 and its complete loss at 7.4. This study demonstrates that seagrass and its epiphytic community are affected by pH levels projected for the end of the century and beyond. |
| Mots-clés | : | - |
| Commentaire | : | - |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Cox TE, Gattuso J-P, Diaz-Castaneda V, Delille J, Schenone S, Gazeau F (2015) Impacts of ocean acidification on the Mediterranean seagrass Posidonia oceanica and its epiphytic community. 2015 Aquatic Sciences Meeting. Granada 22-27 February 2015
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