Growth rates of the cold-water coral Desmophyllum dianthus during an ex-situ experiment in the Azores
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2024
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| _version_ | 1867171889779048448 |
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| author | Carreiro-Silva, Marina Godinho, António Sire de Vilar, Anaïs Arzeni, Beatriz Edery, Gal-la Caetano, Miguel Raimundo, Joana Martins, Ines |
| author_facet | Carreiro-Silva, Marina Godinho, António Sire de Vilar, Anaïs Arzeni, Beatriz Edery, Gal-la Caetano, Miguel Raimundo, Joana Martins, Ines |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We conducted a medium-term (4 months) multiple stressor experiment with the cold-water coral Desmophyllum dianthus under future environmental conditions (IPCC RCP 8.5 scenarios for 2100), and sediment plumes generated during the potential extraction of seafloor massive sulphides. The experiment followed a two-step approach, where during the first 3 months, corals were exposed to four different treatments combining predicted scenarios of ocean acidification (pCO2/pH) and food availability. Two levels of pCO2 conditions were considered: natural habitat present day conditions (~500 µatm, 720 m depth) and IPCC RCP8.5 scenario (1000 µatm; IPCC, 2019), corresponding to pHT values of 7.93 and 7.66, respectively. In addition, two food availability regimes were recreated: high frequency of feeding (food delivered twice a day / 7 days a week) and low frequency of feeding (food delivered every other day). There were six replicate 13 L aquaria per treatment (4 D. dianthus per aquaria) at a temperature of 10.5 ± 0.1 ºC. During the fourth month of the experiment, suspended polymetallic sulphide particles generated during potential mining activities were added to half of the aquaria under the climate change scenarios at a concentration of 10 mg/l, making 8 treatments in a fully crossed experimental design for the 3 factors tested (OA, food, mining particles). Growth rates were measured using the buoyant weighing technique (Jokiel et al. 1978), using a balance (Mettler-Toledo ME204T) with a precision of 0.1 mg. Corals were weighed twice during the experiment: 1-2 weeks after the start of the experiment and just before the second phase of the experiment with PMS addition, which corresponded to a time interval of 63-71 days. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_966829 |
| institution | PANGAEA |
| language | en |
| publishDate | 2024 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Growth rates of the cold-water coral Desmophyllum dianthus during an ex-situ experiment in the Azores Carreiro-Silva, Marina Godinho, António Sire de Vilar, Anaïs Arzeni, Beatriz Edery, Gal-la Caetano, Miguel Raimundo, Joana Martins, Ines Analytical balance, Mettler-Toledo, ME204T; Aquaria ID; Atlantic; Azores; calcification; Calculated; deep-sea coral; Desmophyllum_dianthus_Aquaria_Experiment; Desmophyllum_dianthus_Sampling_Site; Desmophyllum dianthus, buoyant mass; Desmophyllum dianthus, growth rate; Desmophyllum dianthus, growth rate of calcium carbonate; ecophysiology; Experiment; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Interval; Laboratory experiment; LLDEP; Longline deployment; metabolism; Sample ID; Species, unique identification; Treatment: carbon dioxide, partial pressure; Treatment: food We conducted a medium-term (4 months) multiple stressor experiment with the cold-water coral Desmophyllum dianthus under future environmental conditions (IPCC RCP 8.5 scenarios for 2100), and sediment plumes generated during the potential extraction of seafloor massive sulphides. The experiment followed a two-step approach, where during the first 3 months, corals were exposed to four different treatments combining predicted scenarios of ocean acidification (pCO2/pH) and food availability. Two levels of pCO2 conditions were considered: natural habitat present day conditions (~500 µatm, 720 m depth) and IPCC RCP8.5 scenario (1000 µatm; IPCC, 2019), corresponding to pHT values of 7.93 and 7.66, respectively. In addition, two food availability regimes were recreated: high frequency of feeding (food delivered twice a day / 7 days a week) and low frequency of feeding (food delivered every other day). There were six replicate 13 L aquaria per treatment (4 D. dianthus per aquaria) at a temperature of 10.5 ± 0.1 ºC. During the fourth month of the experiment, suspended polymetallic sulphide particles generated during potential mining activities were added to half of the aquaria under the climate change scenarios at a concentration of 10 mg/l, making 8 treatments in a fully crossed experimental design for the 3 factors tested (OA, food, mining particles). Growth rates were measured using the buoyant weighing technique (Jokiel et al. 1978), using a balance (Mettler-Toledo ME204T) with a precision of 0.1 mg. Corals were weighed twice during the experiment: 1-2 weeks after the start of the experiment and just before the second phase of the experiment with PMS addition, which corresponded to a time interval of 63-71 days. |
| title | Growth rates of the cold-water coral Desmophyllum dianthus during an ex-situ experiment in the Azores |
| topic | Analytical balance, Mettler-Toledo, ME204T; Aquaria ID; Atlantic; Azores; calcification; Calculated; deep-sea coral; Desmophyllum_dianthus_Aquaria_Experiment; Desmophyllum_dianthus_Sampling_Site; Desmophyllum dianthus, buoyant mass; Desmophyllum dianthus, growth rate; Desmophyllum dianthus, growth rate of calcium carbonate; ecophysiology; Experiment; iAtlantic; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Interval; Laboratory experiment; LLDEP; Longline deployment; metabolism; Sample ID; Species, unique identification; Treatment: carbon dioxide, partial pressure; Treatment: food |
| url | https://doi.org/10.1594/PANGAEA.966829 |