Planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean
Planktic foraminiferal assemblages vary in response to seasonal fluctuations of hydrographic properties, between water masses, and after periodical changes and episodic events (e.g. reproduction, storms). Distinct annual variability of the planktic foraminiferal flux is also known from sediment trap...
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.728676 https://doi.org/10.1594/PANGAEA.728676 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.728676 2024-09-15T18:24:30+00:00 Planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean Schiebel, Ralf Hemleben, Christoph MEDIAN LATITUDE: 45.928970 * MEDIAN LONGITUDE: -19.431226 * SOUTH-BOUND LATITUDE: 33.939867 * WEST-BOUND LONGITUDE: -22.304000 * NORTH-BOUND LATITUDE: 57.995833 * EAST-BOUND LONGITUDE: -17.757050 * DATE/TIME START: 1988-04-08T09:40:00 * DATE/TIME END: 1993-06-16T08:56:00 2000 application/zip, 153 datasets https://doi.pangaea.de/10.1594/PANGAEA.728676 https://doi.org/10.1594/PANGAEA.728676 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.728676 https://doi.org/10.1594/PANGAEA.728676 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Schiebel, Ralf; Hemleben, Christoph (2000): Interannual variability of planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean (JGOFS). Deep Sea Research Part II: Topical Studies in Oceanography, 47(9-11), 1809-1852, https://doi.org/10.1016/S0967-0645(00)00008-4 102 111 129 148 158 164 167 172 173 176 177 1781 181 187 188 199 204 211 219 224 225 227 228 230 231 247 25 250 277 285 286 289 292 30 301 302 306 309 311 314 319 320 322 323 324 325 327 328 351 357 dataset publication series 2000 ftpangaea https://doi.org/10.1594/PANGAEA.72867610.1016/S0967-0645(00)00008-4 2024-08-21T00:02:25Z Planktic foraminiferal assemblages vary in response to seasonal fluctuations of hydrographic properties, between water masses, and after periodical changes and episodic events (e.g. reproduction, storms). Distinct annual variability of the planktic foraminiferal flux is also known from sediment trap data. In this paper we discuss the short-term impacts on interannual flux rates based on data from opening-closing net hauls obtained between the ocean surface and 500 m water depth. Data were recorded during April, May, June, and August at around 47°N, 20°W (BIOTRANS) in 1988, 1989, 1990, 1992, 1993, and during May 1989 and 1992 at 57°N, 20-22°W. Species assemblages closely resemble each other when comparing the mixed layer fauna with the fauna of the upper 100 m and the upper 500 m of the water column. In addition, species assemblages >100 µm are almost indistinguishable from assemblages that are >125 µm in test size. The standing stock of planktic foraminifers at BIOTRANS can vary by more than one order of magnitude over different years; however, species assemblages may be similar when comparing corresponding seasons. Early summer assemblages (June) are distinctly different from late summer assemblages (August). Significant variations in the species composition during spring (April/May) are independent of the mixed layer depth. Spring assemblages are characterized by high numbers of Globigerinita glutinata. In particular, day-to-day variations of the number of specimens and in species composition may have the same order of magnitude as interannual variations. This appears to be independent of the reproduction cycle. Species assemblages at 47°N and 57°N are similar during spring, although surface water temperatures and salinities differ by up to 10°C and 0.7 (PSU). We suggest that the main factors controlling the planktic foraminiferal fauna are the trophic properties in the upper ocean productive layer. Planktic foraminiferal carbonate flux as calculated from assemblages reveals large seasonal variations, a ... Other/Unknown Material North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-22.304000,-17.757050,57.995833,33.939867) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
102 111 129 148 158 164 167 172 173 176 177 1781 181 187 188 199 204 211 219 224 225 227 228 230 231 247 25 250 277 285 286 289 292 30 301 302 306 309 311 314 319 320 322 323 324 325 327 328 351 357 |
spellingShingle |
102 111 129 148 158 164 167 172 173 176 177 1781 181 187 188 199 204 211 219 224 225 227 228 230 231 247 25 250 277 285 286 289 292 30 301 302 306 309 311 314 319 320 322 323 324 325 327 328 351 357 Schiebel, Ralf Hemleben, Christoph Planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean |
topic_facet |
102 111 129 148 158 164 167 172 173 176 177 1781 181 187 188 199 204 211 219 224 225 227 228 230 231 247 25 250 277 285 286 289 292 30 301 302 306 309 311 314 319 320 322 323 324 325 327 328 351 357 |
description |
Planktic foraminiferal assemblages vary in response to seasonal fluctuations of hydrographic properties, between water masses, and after periodical changes and episodic events (e.g. reproduction, storms). Distinct annual variability of the planktic foraminiferal flux is also known from sediment trap data. In this paper we discuss the short-term impacts on interannual flux rates based on data from opening-closing net hauls obtained between the ocean surface and 500 m water depth. Data were recorded during April, May, June, and August at around 47°N, 20°W (BIOTRANS) in 1988, 1989, 1990, 1992, 1993, and during May 1989 and 1992 at 57°N, 20-22°W. Species assemblages closely resemble each other when comparing the mixed layer fauna with the fauna of the upper 100 m and the upper 500 m of the water column. In addition, species assemblages >100 µm are almost indistinguishable from assemblages that are >125 µm in test size. The standing stock of planktic foraminifers at BIOTRANS can vary by more than one order of magnitude over different years; however, species assemblages may be similar when comparing corresponding seasons. Early summer assemblages (June) are distinctly different from late summer assemblages (August). Significant variations in the species composition during spring (April/May) are independent of the mixed layer depth. Spring assemblages are characterized by high numbers of Globigerinita glutinata. In particular, day-to-day variations of the number of specimens and in species composition may have the same order of magnitude as interannual variations. This appears to be independent of the reproduction cycle. Species assemblages at 47°N and 57°N are similar during spring, although surface water temperatures and salinities differ by up to 10°C and 0.7 (PSU). We suggest that the main factors controlling the planktic foraminiferal fauna are the trophic properties in the upper ocean productive layer. Planktic foraminiferal carbonate flux as calculated from assemblages reveals large seasonal variations, a ... |
format |
Other/Unknown Material |
author |
Schiebel, Ralf Hemleben, Christoph |
author_facet |
Schiebel, Ralf Hemleben, Christoph |
author_sort |
Schiebel, Ralf |
title |
Planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean |
title_short |
Planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean |
title_full |
Planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean |
title_fullStr |
Planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean |
title_full_unstemmed |
Planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean |
title_sort |
planktic foraminiferal populations and test flux in the eastern north atlantic ocean |
publisher |
PANGAEA |
publishDate |
2000 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.728676 https://doi.org/10.1594/PANGAEA.728676 |
op_coverage |
MEDIAN LATITUDE: 45.928970 * MEDIAN LONGITUDE: -19.431226 * SOUTH-BOUND LATITUDE: 33.939867 * WEST-BOUND LONGITUDE: -22.304000 * NORTH-BOUND LATITUDE: 57.995833 * EAST-BOUND LONGITUDE: -17.757050 * DATE/TIME START: 1988-04-08T09:40:00 * DATE/TIME END: 1993-06-16T08:56:00 |
long_lat |
ENVELOPE(-22.304000,-17.757050,57.995833,33.939867) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Schiebel, Ralf; Hemleben, Christoph (2000): Interannual variability of planktic foraminiferal populations and test flux in the eastern North Atlantic Ocean (JGOFS). Deep Sea Research Part II: Topical Studies in Oceanography, 47(9-11), 1809-1852, https://doi.org/10.1016/S0967-0645(00)00008-4 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.728676 https://doi.org/10.1594/PANGAEA.728676 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.72867610.1016/S0967-0645(00)00008-4 |
_version_ |
1810464875459117056 |