Effects of ocean acidification on Posidonia oceanica epiphytic community and shoot productivity ...

• Main Authors: Cox, T Erin, Schenone, Stefano, Delille, Jeremy, Díaz-Castañeda, Victoria, Alliouane, Samir, Gattuso, Jean-Pierre, Gazeau, Frédéric
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Benthos; Bottles or small containers/Aquaria <20 L; Calcification/Dissolution; Coast and continental shelf; Community composition and diversity; Laboratory experiment; Macroalgae; Mediterranean Sea; Plantae; Posidonia oceanica; Primary production/Photosynthesis; Respiration; Single species; Temperate; Tracheophyta; Type; Species; Registration number of species; Uniform resource locator/link to reference; Treatment; Time point, descriptive; Photosynthetic quantum efficiency; Photosynthetic quantum efficiency, standard error; Maximal electron transport rate, relative; Maximal electron transport rate, relative, standard error; Saturation light intensity; Saturation light intensity, standard error; Effective quantum yield; Effective quantum yield, standard error; Irradiance; Electron transport rate, relative; Electron transport rate, relative, standard error; Net primary production of oxygen; Net primary production of oxygen, standard error; Respiration rate, oxygen; Respiration rate, oxygen, standard error; Net calcification rate of calcium carbonate; Net calcification rate of calcium carbonate, standard error; Light saturation point; Light saturation point, standard error; Maximum potential capacity of photosynthesis, oxygen; Maximum potential capacity of photosynthesis, oxygen , standard error; Irradiance, standard error; Leaf net production, oxygen; Leaf net production, oxygen, standard error; Replicates; Group; Coverage; Ratio; Taxon/taxa; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.859956; https://doi.pangaea.de/10.1594/PANGAEA.859956

1. Biological interactions can alter predictions that are based on single-species physiological response. It is known that leaf segments of the seagrass Posidonia oceanica will increase photosynthesis with lowered pH, but it is not clear whether the outcome will be altered when the whole plant and its epiphyte community, with different respiratory and photosynthetic demands, are included. In addition, the effects on the Posidonia epiphyte community have rarely been tested under controlled conditions, at near-future pH levels.2. In order to better evaluate the effects of pH levels as projected for the upcoming decades on seagrass meadows, shoots of P. oceanica with their associated epiphytes were exposed in the laboratory to three pH levels (ambient: 8.1, 7.7 and 7.3, on the total scale) for 4 weeks. Net productivity, respiration, net calcification and leaf fluorescence were measured on several occasions. At the end of the study, epiphyte community abundance and composition, calcareous mass and crustose ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2016-04-14. ...