Habitats and chemical characteristics of planktonic foraminifera in the Atlantic Ocean
Planktonic foraminifera are free-floating protozoa, which react sensitively on their immediate environment. The geographical distribution of planktonic foraminifera is, above all, related to water temperature. On the other hand, the vertical distribution is much more differentiated and governed by a...
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ftoceanrep:oai:oceanrep.geomar.de:11622 2024-09-15T18:23:59+00:00 Habitats and chemical characteristics of planktonic foraminifera in the Atlantic Ocean Harbers, Almuth Thea Elisabeth 2011 text https://oceanrep.geomar.de/id/eprint/11622/ https://oceanrep.geomar.de/id/eprint/11622/1/2011_Diss_Harbers_LQ.pdf http://macau.uni-kiel.de/receive/dissertation_diss_00006274 en eng https://oceanrep.geomar.de/id/eprint/11622/1/2011_Diss_Harbers_LQ.pdf Harbers, A. T. E. (2011) Habitats and chemical characteristics of planktonic foraminifera in the Atlantic Ocean. Open Access (PhD/ Doctoral thesis), Christian-Albrechts-Universität, Kiel, VIII, 76, XX Bl. pp. UrhG info:eu-repo/semantics/openAccess Thesis NonPeerReviewed 2011 ftoceanrep 2024-08-13T14:03:58Z Planktonic foraminifera are free-floating protozoa, which react sensitively on their immediate environment. The geographical distribution of planktonic foraminifera is, above all, related to water temperature. On the other hand, the vertical distribution is much more differentiated and governed by an interaction of physical, biological and chemical parameters. Chemical entities are also imprinting foraminiferal shells during their ontogenesis and thus, make the foraminifera a signal carrier for environmental and paleoceanographical proxies. Therefore, I focused on biogeographical studies and on chemical aspects to assess planktonic foraminiferal habitats and to improve our understanding of the role of planktonic foraminifera as environmental signal carriers. The present study focuses on three regions of the Atlantic Ocean, the seas to the west of Ireland, Cape Verde and central tropical Atlantic. A comparison of faunal composition in intermediate water of the North Atlantic Ocean did not reveal differences between recent faunal composition to subfossil assemblages from surface sediments, but the species proportions were different. This contrast was mainly driven by the subtropical species Globorotalia hirsuta, which was frequent in 2004 but rare in surface sediment samples and in earlier plankton collections obtained from the southern Porcupine Seabight during the 1990s. Furthermore, the study revealed the influence of phytoplankton blooms on foraminiferal weight and thus, a strong contribution of G. hirsuta, Neogloboquadrina incompta and Globigerina bulloides to the foraminiferal carbonate flux. In the tropical Atlantic, the fine-scale vertical distribution coupled with the size distribution of planktonic foramininferal species revealed a distinctly different standing stock between the central Atlantic and the Cape Verde region. The most regular pattern was observed in the surface dwelling Globigerinoides sacculifer, which had a steady abundance over the entire sampling period in both regions. In contrast, ... Thesis North Atlantic Planktonic foraminifera OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Planktonic foraminifera are free-floating protozoa, which react sensitively on their immediate environment. The geographical distribution of planktonic foraminifera is, above all, related to water temperature. On the other hand, the vertical distribution is much more differentiated and governed by an interaction of physical, biological and chemical parameters. Chemical entities are also imprinting foraminiferal shells during their ontogenesis and thus, make the foraminifera a signal carrier for environmental and paleoceanographical proxies. Therefore, I focused on biogeographical studies and on chemical aspects to assess planktonic foraminiferal habitats and to improve our understanding of the role of planktonic foraminifera as environmental signal carriers. The present study focuses on three regions of the Atlantic Ocean, the seas to the west of Ireland, Cape Verde and central tropical Atlantic. A comparison of faunal composition in intermediate water of the North Atlantic Ocean did not reveal differences between recent faunal composition to subfossil assemblages from surface sediments, but the species proportions were different. This contrast was mainly driven by the subtropical species Globorotalia hirsuta, which was frequent in 2004 but rare in surface sediment samples and in earlier plankton collections obtained from the southern Porcupine Seabight during the 1990s. Furthermore, the study revealed the influence of phytoplankton blooms on foraminiferal weight and thus, a strong contribution of G. hirsuta, Neogloboquadrina incompta and Globigerina bulloides to the foraminiferal carbonate flux. In the tropical Atlantic, the fine-scale vertical distribution coupled with the size distribution of planktonic foramininferal species revealed a distinctly different standing stock between the central Atlantic and the Cape Verde region. The most regular pattern was observed in the surface dwelling Globigerinoides sacculifer, which had a steady abundance over the entire sampling period in both regions. In contrast, ... |
format |
Thesis |
author |
Harbers, Almuth Thea Elisabeth |
spellingShingle |
Harbers, Almuth Thea Elisabeth Habitats and chemical characteristics of planktonic foraminifera in the Atlantic Ocean |
author_facet |
Harbers, Almuth Thea Elisabeth |
author_sort |
Harbers, Almuth Thea Elisabeth |
title |
Habitats and chemical characteristics of planktonic foraminifera in the Atlantic Ocean |
title_short |
Habitats and chemical characteristics of planktonic foraminifera in the Atlantic Ocean |
title_full |
Habitats and chemical characteristics of planktonic foraminifera in the Atlantic Ocean |
title_fullStr |
Habitats and chemical characteristics of planktonic foraminifera in the Atlantic Ocean |
title_full_unstemmed |
Habitats and chemical characteristics of planktonic foraminifera in the Atlantic Ocean |
title_sort |
habitats and chemical characteristics of planktonic foraminifera in the atlantic ocean |
publishDate |
2011 |
url |
https://oceanrep.geomar.de/id/eprint/11622/ https://oceanrep.geomar.de/id/eprint/11622/1/2011_Diss_Harbers_LQ.pdf http://macau.uni-kiel.de/receive/dissertation_diss_00006274 |
genre |
North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Planktonic foraminifera |
op_relation |
https://oceanrep.geomar.de/id/eprint/11622/1/2011_Diss_Harbers_LQ.pdf Harbers, A. T. E. (2011) Habitats and chemical characteristics of planktonic foraminifera in the Atlantic Ocean. Open Access (PhD/ Doctoral thesis), Christian-Albrechts-Universität, Kiel, VIII, 76, XX Bl. pp. |
op_rights |
UrhG info:eu-repo/semantics/openAccess |
_version_ |
1810464277897674752 |