Bathyal benthic macrofauna composition, biomass, and carbon and nitrogen uptake from incubation experiments under climate change projections in the Cabo Verde Basin, NE Atlantic
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2025
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| _version_ | 1867171896056872960 |
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| author | Gaurisas, Daniela Y de Jonge, Danielle Bernardino, Angelo Fraga Sweetman, Andrew K |
| author_facet | Gaurisas, Daniela Y de Jonge, Danielle Bernardino, Angelo Fraga Sweetman, Andrew K |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | An experimental approach was developed to assess the individual and combined effects of two climate change stressors (seawater temperature and POC quality) on deep-sea benthic macrofaunal assemblages. Sediment samples were collected from the bathyal continental slope of the Cabo Verde Basin (CVB, Equatorial Atlantic) in August 2021. The data originate from a controlled onboard experiment using stable isotope tracers (13C and 15N) to simulate climate change projections. A total of 19 sediment cores, obtained via four multi-corer deployments, were subjected to four treatments: a control, increased temperature (+2 °C), reduced POC quality (dialysed labile fraction), or a combination of both. Following a 48-hour incubation period, the macrofaunal organisms were fixed, sieved (300 µm mesh), sorted, and identified. The resulting dataset includes quantitative measurements of macrofaunal abundance, biomass, and taxonomic composition. Samples were dried at 45°C and calcareous organisms acidified before a second drying. Individual organisms from different sediment layers of the same core were pooled (polychaetes into feeding guilds) to obtain enough biomass for isotope measurements. Dried samples were analyzed for dry mass, carbon and nitrogen content, and stable isotope signatures (δ13C, δ15N). |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_977643 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Bathyal benthic macrofauna composition, biomass, and carbon and nitrogen uptake from incubation experiments under climate change projections in the Cabo Verde Basin, NE Atlantic Gaurisas, Daniela Y de Jonge, Danielle Bernardino, Angelo Fraga Sweetman, Andrew K Balance; Biomass, dry mass; Biomass as carbon; Biomass as nitrogen; Cabo Verde Archipelago, Cabo Verde; Calculated; Class; Comment; Continental Slope; Counts; Data type; Date/Time of event; Date/Time of event 2; Deep-sea macrofauna; Equatorial Atlantic; Event label; Family; iAtlantic; Identification; iMirabilis2_Leg1; iMirabilis2_Leg1_3_AKS291; iMirabilis2_Leg1_4_AKS292; iMirabilis2_Leg1_5_AKS293; iMirabilis2_Leg1_6_AKS294; iMirabilis2 station 3; iMirabilis2 station 4; iMirabilis2 station 5; iMirabilis2 station 6; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Latitude of event; Longitude of event; Macrofauna, incorporation rate of carbon; Macrofauna, incorporation rate of nitrogen; MUC; MUCKCD70000; MultiCorer; MultiCorer, KC Denmark, 70.000; Order; PDZ Europa ANCA-GSL elemental analyser; Phylum; POC flux; Sample area; Sample elevation; Sample ID; Sarmiento de Gamboa; Species; Suborder; Taxon/taxa, unique identification (Semantic URI); Taxon/taxa, unique identification (URI); Temperature change; Trophic level description; Type of chamber; VID; Visual counts; Visual identification; δ13C, organic carbon; δ15N, total nitrogen An experimental approach was developed to assess the individual and combined effects of two climate change stressors (seawater temperature and POC quality) on deep-sea benthic macrofaunal assemblages. Sediment samples were collected from the bathyal continental slope of the Cabo Verde Basin (CVB, Equatorial Atlantic) in August 2021. The data originate from a controlled onboard experiment using stable isotope tracers (13C and 15N) to simulate climate change projections. A total of 19 sediment cores, obtained via four multi-corer deployments, were subjected to four treatments: a control, increased temperature (+2 °C), reduced POC quality (dialysed labile fraction), or a combination of both. Following a 48-hour incubation period, the macrofaunal organisms were fixed, sieved (300 µm mesh), sorted, and identified. The resulting dataset includes quantitative measurements of macrofaunal abundance, biomass, and taxonomic composition. Samples were dried at 45°C and calcareous organisms acidified before a second drying. Individual organisms from different sediment layers of the same core were pooled (polychaetes into feeding guilds) to obtain enough biomass for isotope measurements. Dried samples were analyzed for dry mass, carbon and nitrogen content, and stable isotope signatures (δ13C, δ15N). |
| title | Bathyal benthic macrofauna composition, biomass, and carbon and nitrogen uptake from incubation experiments under climate change projections in the Cabo Verde Basin, NE Atlantic |
| topic | Balance; Biomass, dry mass; Biomass as carbon; Biomass as nitrogen; Cabo Verde Archipelago, Cabo Verde; Calculated; Class; Comment; Continental Slope; Counts; Data type; Date/Time of event; Date/Time of event 2; Deep-sea macrofauna; Equatorial Atlantic; Event label; Family; iAtlantic; Identification; iMirabilis2_Leg1; iMirabilis2_Leg1_3_AKS291; iMirabilis2_Leg1_4_AKS292; iMirabilis2_Leg1_5_AKS293; iMirabilis2_Leg1_6_AKS294; iMirabilis2 station 3; iMirabilis2 station 4; iMirabilis2 station 5; iMirabilis2 station 6; Integrated Assessment of Atlantic Marine Ecosystems in Space and Time; Latitude of event; Longitude of event; Macrofauna, incorporation rate of carbon; Macrofauna, incorporation rate of nitrogen; MUC; MUCKCD70000; MultiCorer; MultiCorer, KC Denmark, 70.000; Order; PDZ Europa ANCA-GSL elemental analyser; Phylum; POC flux; Sample area; Sample elevation; Sample ID; Sarmiento de Gamboa; Species; Suborder; Taxon/taxa, unique identification (Semantic URI); Taxon/taxa, unique identification (URI); Temperature change; Trophic level description; Type of chamber; VID; Visual counts; Visual identification; δ13C, organic carbon; δ15N, total nitrogen |
| url | https://doi.org/10.1594/PANGAEA.977643 |