Aquarium monitoring during an ex-situ experiment on the effects of simulated deep-sea mining sediment plumes on the cold-water octocoral Dentomuricea aff. meteor in the Azores

• Main Authors: Carreiro-Silva, Marina, Marques, Sandra, Godinho, Antonio, Raimundo, Joana, Caetano, Miguel, Brito, Pedro, Colaço, Ana, Martins, Ines
• Format: Dataset
• Language: English
• Published: PANGAEA 2024
• Subjects: Analysis date/time; experiment; Aquaria ID; Azores; CCFZ; Cnidaria; Condor Seamounts; Conductivity meter; S30 SevenEasy; Deep sea; Dentomuricea_aff_meteor_Aquaria_Experiment_2; Dentomuricea_aff_meteor_Sampling_Site; ecophysiology; ecotoxicology; Experiment duration; hydrothermal vents; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; LLDEP; Longline deployment; Oxygen; Oxygen Dipping Probe; DP-PSt3; Fibox 4; PreSens; pH; pH meter; Mettler Toledo; Seven2Go pH /Ion meter S8; Salinity; Species; unique identification (Semantic URI); unique identification (URI); Temperature; water; Treatment; Pacific; Toledo; Northeast Atlantic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.966832; https://doi.org/10.1594/PANGAEA.966832

We report the results of an aquaria-based experiment testing the effects of simulated sediment plumes generated during mining activities for the extraction of ferromanganese nodules in the Clarion-Clipperton Fracture Zone (CCFZ), northeastern equatorial Pacific Ocean, and seafloor massive sulfides from a hydrothermal vent field in the Azores, northeast Atlantic, on the physiology of the cold-water octocoral Dentomuricea aff. meteor. Coral fragments were exposed to five experimental treatments for a period of four weeks at the DeepSeaLab aquaria facilities (Okeanos-University of the Azores): (1) suspended plumes of abyssal sediments from nodule fields at a concentration of 10 mg/l; (2) suspended plumes of abyssal sediments from nodule fields at a concentration of 50 mg/l; (3) hydrothermal polymetallic sulphide particles at a concentration of 10 mg/l; (4) hydrothermal polymetallic sulphide particles at a concentration of 50 mg/l; and (5) a control treatment with no sediment addition. Seawater physical-chemical parameters were measured daily in each aquarium. Temperature and pH were measured manually in each aquaria every day using a Mettler-Toledo Seven2Go pH /Ion meter S8, salinity was measured with a S30 SevenEasyTM conductivity meter and oxygen concentration was measured with a Fibox4 (PreSens) with a Oxygen Dipping Probe DP-PSt3.