Impact of dust addition on the metabolism of Mediterranean plankton communities and carbon export under present and future conditions of pH and temperature ...

• Main Authors: Gazeau, Frédéric, Van Wambeke, France, Marañón, Emilio, Pérez-Lorenzo, Maria, Alliouane, Samir, Stolpe, Christian, Blasco, Thierry, Leblond, Nathalie, Zäncker, Birthe, Engel, Anja, Marie, Barbara, Dinasquet, Julie, Guieu, Cecile
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2021
• Subjects: Biomass/Abundance/Elemental composition; Coast and continental shelf; Community composition and diversity; Containers and aquaria 20-1000 L or < 1 m**2; Entire community; Laboratory experiment; Mediterranean Sea; Other; Other metabolic rates; Pelagos; Primary production/Photosynthesis; Respiration; Temperate; Temperature; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.942466; https://doi.pangaea.de/10.1594/PANGAEA.942466

Although atmospheric dust fluxes from arid as well as human-impacted areas represent a significant source of nutrients to surface waters of the Mediterranean Sea, studies focusing on the evolution of the metabolic balance of the plankton community following a dust deposition event are scarce, and none were conducted in the context of projected future levels of temperature and pH. Moreover, most of the experiments took place in coastal areas. In the framework of the PEACETIME project, three dust-addition perturbation experiments were conducted in 300 L tanks filled with surface seawater collected in the Tyrrhenian Sea (TYR), Ionian Sea (ION) and Algerian basin (FAST) on board the R/V Pourquoi Pas? in late spring 2017. For each experiment, six tanks were used to follow the evolution of chemical and biological stocks, biological activity and particle export. The impacts of a dust deposition event simulated at their surface were followed under present environmental conditions and under a realistic climate change ...