Planktic foraminifera analyses of surface sediments and satellite data in the Canary Islands region
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2002
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| author | Meggers, Helge Freudenthal, Tim Nave, Silvia Osorio Targarona, Jordi Abrantes, Fatima F Helmke, Peer |
| author_facet | Meggers, Helge Freudenthal, Tim Nave, Silvia Osorio Targarona, Jordi Abrantes, Fatima F Helmke, Peer |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Canary Islands region occupies a key position with respect to biogeochemical cycles, with the zonal transition from oligotrophic to nutrient-rich waters and the contribution of Saharan dust to the particle flux. We present the distribution of geochemical proxies (TOC, carbonate, d15N, d13Corg, C/N-ratio) and micropaleontological parameters (diatoms, dinoflagellates, foraminifera, pteropods), in 80 surface-sediment samples in order to characterise the influence of coastally upwelled water on the domain of the subtropical gyre. Results of the surface-sediment analyses confirmed the high biomass gradient from the coast to the open ocean inferred from satellite data of surface chlorophyll or SST. The distribution of total dinoflagellate cysts, the planktic foraminifera species Globigerina bulloides, the diatom resting spore Chaetoceros spp., and TOC concentration coincided well with the areas of strong filament production off Cape Ghir and Cape Yubi. The warm-water planktic foraminifera Globigerinoides ruber (white), the diatom Nitzschia spp., and the d15N-values showed the opposite trend with high values in the open ocean. Factor analyses on the planktic foraminifera species distribution indicated three major assemblages in the Canary Islands region that represent the present surface-water conditions from the upwelling influenced region via a mixing area towards the subtropical gyre. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_777426 |
| institution | PANGAEA |
| language | en |
| publishDate | 2002 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Planktic foraminifera analyses of surface sediments and satellite data in the Canary Islands region Meggers, Helge Freudenthal, Tim Nave, Silvia Osorio Targarona, Jordi Abrantes, Fatima F Helmke, Peer Agadir Canyon; Canary Islands; Canary Islands Azores Gibraltar Observations; CANIGO; GeoB; GeoB4024-3; GeoB4025-2; GeoB4026-1; GeoB4029-2; GeoB4031-1; GeoB4038-2; GeoB4040-2; GeoB4057-2; GeoB4060-2; GeoB4202-1; GeoB4204-1; GeoB4205-1; GeoB4206-2; GeoB4207-1; GeoB4208-1; GeoB4209-1; GeoB4210-2; GeoB4211-1; GeoB4212-3; GeoB4213-1; GeoB4214-3; GeoB4215-1; GeoB4216-2; GeoB4217-1; GeoB4220-2; GeoB4221-2; GeoB4223-1; GeoB4225-3; GeoB4226-1; GeoB4227-1; GeoB4228-1; GeoB4229-2; GeoB4230-1; GeoB4231-2; GeoB4232-1; GeoB4233-2; GeoB4234-1; GeoB4235-1; GeoB4236-2; GeoB4237-1; GeoB4238-2; GeoB4239-1; GeoB4241-5; GeoB4242-4; GeoB4301-1; GeoB5529-1; GeoB5530-3; GeoB5531-1; GeoB5532-2; GeoB5533-1; GeoB5534-2; GeoB5535-1; GeoB5536-3; GeoB5537-2; GeoB5538-2; GeoB5539-2; GeoB5540-3; GeoB5541-2; GeoB5542-3; GeoB5546-3; GeoB5547-2; GeoB5548-3; GeoB5549-2; GeoB5550-3; GeoB5551-2; GeoB5553-2; GeoB5555-2; GeoB5556-3; GeoB5557-2; GeoB5558-2; GeoB5559-1; GeoB5560-2; GeoB5561-1; GeoB6005-1; GeoB6006-2; GeoB6007-1; GeoB6008-2; GeoB6009-1; GeoB6010-1; GeoB6011-2; Geosciences, University of Bremen; Giant box corer; GKG; M37/1; M38/1; M42/4b; M45/5a; Meteor (1986); MUC; MultiCorer; VH96/1-3; VH96/1-4; Victor Hensen The Canary Islands region occupies a key position with respect to biogeochemical cycles, with the zonal transition from oligotrophic to nutrient-rich waters and the contribution of Saharan dust to the particle flux. We present the distribution of geochemical proxies (TOC, carbonate, d15N, d13Corg, C/N-ratio) and micropaleontological parameters (diatoms, dinoflagellates, foraminifera, pteropods), in 80 surface-sediment samples in order to characterise the influence of coastally upwelled water on the domain of the subtropical gyre. Results of the surface-sediment analyses confirmed the high biomass gradient from the coast to the open ocean inferred from satellite data of surface chlorophyll or SST. The distribution of total dinoflagellate cysts, the planktic foraminifera species Globigerina bulloides, the diatom resting spore Chaetoceros spp., and TOC concentration coincided well with the areas of strong filament production off Cape Ghir and Cape Yubi. The warm-water planktic foraminifera Globigerinoides ruber (white), the diatom Nitzschia spp., and the d15N-values showed the opposite trend with high values in the open ocean. Factor analyses on the planktic foraminifera species distribution indicated three major assemblages in the Canary Islands region that represent the present surface-water conditions from the upwelling influenced region via a mixing area towards the subtropical gyre. |
| title | Planktic foraminifera analyses of surface sediments and satellite data in the Canary Islands region |
| topic | Agadir Canyon; Canary Islands; Canary Islands Azores Gibraltar Observations; CANIGO; GeoB; GeoB4024-3; GeoB4025-2; GeoB4026-1; GeoB4029-2; GeoB4031-1; GeoB4038-2; GeoB4040-2; GeoB4057-2; GeoB4060-2; GeoB4202-1; GeoB4204-1; GeoB4205-1; GeoB4206-2; GeoB4207-1; GeoB4208-1; GeoB4209-1; GeoB4210-2; GeoB4211-1; GeoB4212-3; GeoB4213-1; GeoB4214-3; GeoB4215-1; GeoB4216-2; GeoB4217-1; GeoB4220-2; GeoB4221-2; GeoB4223-1; GeoB4225-3; GeoB4226-1; GeoB4227-1; GeoB4228-1; GeoB4229-2; GeoB4230-1; GeoB4231-2; GeoB4232-1; GeoB4233-2; GeoB4234-1; GeoB4235-1; GeoB4236-2; GeoB4237-1; GeoB4238-2; GeoB4239-1; GeoB4241-5; GeoB4242-4; GeoB4301-1; GeoB5529-1; GeoB5530-3; GeoB5531-1; GeoB5532-2; GeoB5533-1; GeoB5534-2; GeoB5535-1; GeoB5536-3; GeoB5537-2; GeoB5538-2; GeoB5539-2; GeoB5540-3; GeoB5541-2; GeoB5542-3; GeoB5546-3; GeoB5547-2; GeoB5548-3; GeoB5549-2; GeoB5550-3; GeoB5551-2; GeoB5553-2; GeoB5555-2; GeoB5556-3; GeoB5557-2; GeoB5558-2; GeoB5559-1; GeoB5560-2; GeoB5561-1; GeoB6005-1; GeoB6006-2; GeoB6007-1; GeoB6008-2; GeoB6009-1; GeoB6010-1; GeoB6011-2; Geosciences, University of Bremen; Giant box corer; GKG; M37/1; M38/1; M42/4b; M45/5a; Meteor (1986); MUC; MultiCorer; VH96/1-3; VH96/1-4; Victor Hensen |
| url | https://doi.org/10.1594/PANGAEA.777426 |