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  • 11
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    Cold-water octocoral Viminella flagellum respiration rates during an acute Cu exposure (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-27
    Description: Herein we report the respiration rates (O2 consumption) of the cold-water coral Viminella flagellum exposed to acute Cu concentrations. In a lab experiment, sixty nubbins of V. flagellum were distributed in six aquaria of 8 L (ten nubbins per aquarium) of each Cu solution (0 (control); 60; 150; 250; 450 and 600 μg/L) for 96 h. After this period, four nubbins from each Cu treatment, selected randomly, were incubated individually for 6 h in glass chambers filled with ca. 110 mL of 0.2 μm pre-filtered seawater, with the respective Cu dilutions (4 chambers per Cu concentration). The incubation period was set to 6 h to record changes in O2 consumption without exposing corals to oxygen levels below 80 % (air saturation, a.s.). During the incubation period, dissolved O2 (μmol/L) depletion rates were recorded every 30 min and corrected by the corresponding rates/variations in chambers without corals. Coral respiration rates were normalized to the coral surface area and time. Results are presented by µmol of O2 consumption per m2 per h.
    Keywords: Azores_Deep_Octocoral_Sampling_Viminella_flagellum; Chamber number; cold-water octocoral; Condor Seamounts; copper; Copper; iAtlantic; INCUB; Incubation; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Marine Ecosystem Restoration in Changing European Seas; MERCES; Oxygen consumption; Respiration rate; Specimen identification
    Type: Dataset
    Format: text/tab-separated-values, 114 data points
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  • 12
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    Results of an ex-situ experiment testing the effects of mining-generated sediment plumes on the cold-water octocoral Dentomuricea aff. meteor in the Azores (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-27
    Description: We report the results of an aquaria-based experiment testing the effects of suspended particles generated during potential mining activities, on a common habitat-building coral species in the Azores, Dentomuricea aff. meteor. Corals were collected from the summit of Condor Seamount (Azores, NE Atlantic) at depths between 185-210 m in August 2014. Coral fragments were maintained in 10-L aquaria and exposed to three experimental treatments for a period of four weeks at the DeepSeaLab aquaria facilities (Okeanos-University of the Azores): (1) control conditions (no added sediments); (2) suspended polymetallic sulphide (PMS) particles; (3) suspended quartz particles. PMS particles were obtained by grinding PMS inactive chimney rocks collected at the hydrothermal vent field Lucky Strike. Both particle types were delivered at a concentration of 25 mg L-1. The putative effects of PMS particles were evaluated through measurements of the coral physiological responses at the levels of the organism (oxygen consumption, ammonium excretion), tissue (bioaccumulation of metals) and cell (enzyme activity and gene expression).
    Keywords: ATLAS; A Trans-Atlantic assessment and deep-water ecosystem-based spatial management plan for Europe; Cnidaria; Condor Seamounts; enzyme activity; experiment; gene expression; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Managing Impacts of Deep-seA reSource exploitation; metabolism; metal bioaccumulation; MIDAS; North Atlantic; octocorals; Sampling_Azores_Cold_Water_Octocoral
    Type: Dataset
    Format: application/zip, 7 datasets
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    DATA PANGAEA
  • 13
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    Embryo and larval biology of the deep-sea octocoral Dentomuricea aff. meteor from the Azores under two temperature regimes (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-27
    Description: The study focuses on the early life stages of the species Dentomuricea aff. meteor, a common deep-sea octocoral in the Azores. The objective was to describe the embryo and larval development, survival and swimming behaviour of early life stages of the target species, under two temperature regimes, corresponding to the minimum and maximum temperatures in its natural environment during the spawning season (13°C and 15°C). Embryo and larval development were monitored closely and revealed faster developmental rates under 15°C. Survival counts were performed throughout embryo and larval development, but were not statistically different between temperatures. Moreover, swimming behaviour was assessed by means of video recordings, revealing a higher larval swimming speed at 15°C. Additional data on larval behaviour are provided, including settlement and metamorphosis rates which were low for both temperatures. Our results showcase how small temperature fluctuations can affect embryo and larval characteristics, potentially impacting larval dispersal and success.
    Keywords: Atlantic; cold-water coral; Deep-sea; Dispersal; early life stages; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; larval development; larval swimming
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 14
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    Counts of live embryos and planula larvae of the antipatharian coral Antipathella wollastoni exposed to different seawater temperatures (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-27
    Description: The antipatharian coral Antipathella wollastoni is commonly found in the Macaronesia (Cape Verde, Madeira, Canaries and the Azores Archipelago). In the Azores Archipelago the species forms dense populations and coral gardens on island slopes between 15-520 m water depth. Here, we present data from two experiments on the embryo and larval survival of A. wollastoni under two different seawater temperatures (21°C and 23­°C). Embryos were collected after spawning of mother colonies in aquaria. In the first experiment, we monitored the number of embryos for 24 h after spawning, while in the second experiment we monitored the number of embryos and planulae (larvae) for a total of 35 h.
    Keywords: Azores; Azores_Antipathella_wollastoni_Dive1; Azores_Antipathella_wollastoni_Dive2; Code; Coral; Counts; DATE/TIME; Dissecting microscope; early life history; early life stages; Elapsed time; Event label; experiment; experimental data; iAtlantic; Identification; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; mesophotic; pH meter, Mettler Toledo, Seven2Go pH /Ion meter S8; Pipette; SCUBA-DIVE; Species; Species, unique identification (Semantic URI); Species, unique identification (URI); Temperature, water, internal; Treatment: temperature; Volume
    Type: Dataset
    Format: text/tab-separated-values, 2028 data points
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  • 15
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    Survival of the deep-sea octocoral Dentomuricea aff. meteor from the Azores under two temperature regimes (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-27
    Description: Includes data estimate of survival.
    Keywords: Atlantic; Batch; cold-water coral; Deep-sea; Dispersal; early life stages; iAtlantic; Individual ID; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; Survival; Survival, censored; Temperature, rearing
    Type: Dataset
    Format: text/tab-separated-values, 3470 data points
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  • 16
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    Embryo development of the deep-sea octocoral Dentomuricea aff. meteor from the Azores under two temperature regimes (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-27
    Description: Includes data on the embryo development of the species. Embryos/larvae were monitored (counted) and classified to developmental stages every 3-4 hours until the planula stage and every 2-3 days afterwards.
    Keywords: Atlantic; Batch; cold-water coral; DATE/TIME; Deep-sea; Dispersal; early life stages; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; larval development; Length; Stage; Temperature, rearing; Time in hours; Width
    Type: Dataset
    Format: text/tab-separated-values, 2435 data points
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  • 17
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    Larval stages of the deep-sea octocoral Dentomuricea aff. meteor from the Azores under two temperature regimes (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-27
    Description: Contains data on larval behaviour.
    Keywords: Atlantic; Batch; cold-water coral; Deep-sea; Dentomuricea aff. meteor, larvae; Dispersal; early life stages; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; larval development; Temperature, rearing; Time in days
    Type: Dataset
    Format: text/tab-separated-values, 491 data points
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  • 18
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    Swimming behaviour of the deep-sea octocoral Dentomuricea aff. meteor from the Azores under two temperature regimes (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-27
    Description: Contains data on swimming velocity and behaviour.
    Keywords: Atlantic; Batch; cold-water coral; DATE/TIME; Deep-sea; Direction; Dispersal; Displacement; early life stages; iAtlantic; Identification; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Laboratory experiment; larval swimming; Speed, swimming; Swimming duration; Temperature, rearing; Time in days
    Type: Dataset
    Format: text/tab-separated-values, 10549 data points
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  • 19
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    Suspended sediment concentrations of an ex-situ experiment with the cold-water octocoral Dentomuricea aff. meteor in the Azores (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-27
    Description: We report the results of an aquaria-based experiment testing the effects of suspended particles generated during potential mining activities, on a common habitat-building coral species in the Azores, Dentomuricea aff. meteor. Coral fragments were maintained in 10-L aquaria and exposed to three experimental treatments for a period of four weeks at the DeepSeaLab aquaria facilities (Okeanos-University of the Azores): (1) control conditions (no added sediments); (2) suspended polymetallic sulphide (PMS) particles; (3) suspended quartz particles. The concentration of suspended PMS and quartz particles in each treatment was measured during an exposure period of 4 hours. Suspended particle concentrations were measured one minute after particle addition, and then at intervals of 5, 15, 30 minutes, 1 hour, 2 hours and 4 hours after particle addition in the PMS and quartz particle treatments and in control aquaria with no particle addition.
    Keywords: Aquarium number; ATLAS; A Trans-Atlantic assessment and deep-water ecosystem-based spatial management plan for Europe; Cnidaria; Condor Seamounts; enzyme activity; experiment; gene expression; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Managing Impacts of Deep-seA reSource exploitation; Measurement duration; metabolism; metal bioaccumulation; MIDAS; North Atlantic; octocorals; Sampling_Azores_Cold_Water_Octocoral; Suspended polymetallic sulfide; Suspended quartz
    Type: Dataset
    Format: text/tab-separated-values, 92 data points
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  • 20
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    Aquarium monitoring of an ex-situ experiment involving the cold-water octocoral Dentomuricea aff. meteor (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-27
    Description: We report the results of an aquaria-based experiment testing the effects of suspended particles generated during potential mining activities, on a common habitat-building coral species in the Azores, Dentomuricea aff. meteor. Coral fragments were maintained in 10-L aquaria and exposed to three experimental treatments for a period of four weeks at the DeepSeaLab aquaria facilities (Okeanos-University of the Azores): (1) control conditions (no added sediments); (2) suspended polymetallic sulphide (PMS) particles; (3) suspended quartz particles. Seawater physical-chemical parameters were measured daily in each aquarium. Seawater salinity was measured with a S30 SevenEasy™ conductivity meter, pH and temperature with a glass electrode (Crison pH 25+), and oxygen with a Fibox4 (PreSens) with a Oxygen Dipping Probe DP-PSt3. Seawater samples for inorganic nutrient analyses were collected on times 0 (immediately before the start of the experiment), and once a week on days 6, 13, 20 and 27 of the experiment and determined using a colorimetric autoanalyzer Sanplus with segmented flow.
    Keywords: Ammonia+Ammonium; Aquarium number; ATLAS; A Trans-Atlantic assessment and deep-water ecosystem-based spatial management plan for Europe; Cnidaria; Colorimetric autoanalysis; Condor Seamounts; Conductivity meter, S30 SevenEasy; Dissolved oxygen, in water, interpolated; enzyme activity; experiment; Experimental treatment; Experiment duration; Fiber optic oxygen meter, Fibox 4, Presens, Germany; gene expression; Glass electrode (Crison pH 25+); iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Managing Impacts of Deep-seA reSource exploitation; metabolism; metal bioaccumulation; MIDAS; Nitrate; North Atlantic; octocorals; pH; Salinity; Sampling_Azores_Cold_Water_Octocoral; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 913 data points
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