Seawater carbonate chemistry and photosystem II (PSII) function, bleaching of coralline alga Amphiroa gracilis and larval settlement ofthe sea urchin Heliocidaris erythrogramma ...

• Main Authors: Huggett, Megan J, McMahon, Kathryn, Bernasconi, Rachele
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: Amphiroa gracilis; Animalia; Benthic animals; Benthos; Bottles or small containers/Aquaria <20 L; Coast and continental shelf; Community composition and diversity; Echinodermata; Entire community; Heliocidaris erythrogramma; Indian Ocean; Laboratory experiment; Macroalgae; Other studied parameter or process; Plantae; Primary production/Photosynthesis; Reproduction; FOS Medical biotechnology; Rhodophyta; Single species; Soft-bottom community; Species interaction; Temperate; Temperature; Type of study; Species; Time point, descriptive; Treatment; Maximal electron transport rate, relative; Light saturation; Identification; Percentage; Metamorphosed, larvae; Temperature, water; Temperature, water, standard error; pH; Partial pressure of carbon dioxide water at sea surface temperature wet air; Partial pressure of carbon dioxide water at sea surface temperature wet air, standard error; Alkalinity, total; Alkalinity, total, standard error; Salinity; Salinity, standard error; Calcite saturation state; Calcite saturation state, standard error; Aragonite saturation state; Aragonite saturation state, standard error; Sample number; Operational taxonomic unit; Operational taxonomic unit, standard deviation; Chao 1 richness; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.958998; https://doi.pangaea.de/10.1594/PANGAEA.958998

Coralline algae are a crucial component of reef systems, stabilising reef substrate, providing habitat and contributing to accretion. Coralline algae and their surface microbial biofilms are also important as settlement cues for marine invertebrates, yet few studies address the impact of future environmental conditions on interactions between coralline algae, reef microbes and settlement by larvae of marine invertebrates. We exposed the temperate coralline algal species Amphiroa gracilis to warming and/or acidification scenarios for 21 days. Algae became bleached but photosystem II (PSII) function was not measurably impacted. Settlement by larvae of the sea urchin Heliocidaris erythrogramma was reduced and the structure of the prokaryotic community associated with A. gracilis was altered. Coralline algae in ambient conditions were dominated by Alphaproteobacteria from the Rhodobacteraceae including Loktonella; those under warming were dominated by Bacteroidetes and Verrucomicrobia; acidification resulted in ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2022) 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 by seacarb is 2023-05-15. ...