Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary
New mid-Cretaceous stable isotope ({delta}18O and {delta}13C) records of multiple planktonic foraminiferal species and coexisting coccoliths from Blake Nose (western North Atlantic) document a major depth-ecology reorganization of planktonic foraminifera. Across the Albian/Cenomanian boundary, deep-...
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Online Access: | http://hdl.handle.net/10088/11272 https://doi.org/10.1666/09027.1 |
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ftsmithonian:oai:repository.si.edu:10088/11272 2023-05-15T17:33:07+02:00 Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary Ando, Atsushi Huber, Brian T. MacLeod, Kenneth G. 2010 application/pdf http://hdl.handle.net/10088/11272 https://doi.org/10.1666/09027.1 unknown Paleobiology Ando, Atsushi, Huber, Brian T., and MacLeod, Kenneth G. 2010. " Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary ." Paleobiology . 36 (3):357–373. https://doi.org/10.1666/09027.1 0094-8373 http://hdl.handle.net/10088/11272 90612 doi:10.1666/09027.1 Journal Article 2010 ftsmithonian https://doi.org/10.1666/09027.1 2020-09-09T18:31:11Z New mid-Cretaceous stable isotope ({delta}18O and {delta}13C) records of multiple planktonic foraminiferal species and coexisting coccoliths from Blake Nose (western North Atlantic) document a major depth-ecology reorganization of planktonic foraminifera. Across the Albian/Cenomanian boundary, deep-dwelling Praeglobotruncana stephani and Rotalipora globotruncanoides adapted to living at a shallower depth, while, at the same time, the population of surface-dwelling Paracostellagerina libyca declined. Subsequently, the opportunistic species Hedbergella delrioensis shifted to a deep environment, and the deep-dwelling forms Rotalipora montsalvensis and Rotalipora reicheli first appeared. The primary paleoenvironmental cause of the observed changes in planktonic adaptive strategies is uncertain, yet their coincidence with an earliest Cenomanian cooling trend reported elsewhere implicates the importance of reduced upper-ocean stratification. Although there has been an implicit assumption that the species-specific depth habitats of fossil planktonic foraminifera were invariant through time, planktonic paleoecology is a potential variable. Accordingly, the possibility of evolutionary changes in planktonic foraminiferal depth ecology should be a primary consideration (along with other environmental parameters) in paleoceanographic interpretations of foraminiferal stable isotope data. NH-Paleobiology NMNH Article in Journal/Newspaper North Atlantic Planktonic foraminifera Unknown Paleobiology 36 3 357 373 |
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ftsmithonian |
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description |
New mid-Cretaceous stable isotope ({delta}18O and {delta}13C) records of multiple planktonic foraminiferal species and coexisting coccoliths from Blake Nose (western North Atlantic) document a major depth-ecology reorganization of planktonic foraminifera. Across the Albian/Cenomanian boundary, deep-dwelling Praeglobotruncana stephani and Rotalipora globotruncanoides adapted to living at a shallower depth, while, at the same time, the population of surface-dwelling Paracostellagerina libyca declined. Subsequently, the opportunistic species Hedbergella delrioensis shifted to a deep environment, and the deep-dwelling forms Rotalipora montsalvensis and Rotalipora reicheli first appeared. The primary paleoenvironmental cause of the observed changes in planktonic adaptive strategies is uncertain, yet their coincidence with an earliest Cenomanian cooling trend reported elsewhere implicates the importance of reduced upper-ocean stratification. Although there has been an implicit assumption that the species-specific depth habitats of fossil planktonic foraminifera were invariant through time, planktonic paleoecology is a potential variable. Accordingly, the possibility of evolutionary changes in planktonic foraminiferal depth ecology should be a primary consideration (along with other environmental parameters) in paleoceanographic interpretations of foraminiferal stable isotope data. NH-Paleobiology NMNH |
format |
Article in Journal/Newspaper |
author |
Ando, Atsushi Huber, Brian T. MacLeod, Kenneth G. |
spellingShingle |
Ando, Atsushi Huber, Brian T. MacLeod, Kenneth G. Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary |
author_facet |
Ando, Atsushi Huber, Brian T. MacLeod, Kenneth G. |
author_sort |
Ando, Atsushi |
title |
Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary |
title_short |
Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary |
title_full |
Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary |
title_fullStr |
Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary |
title_full_unstemmed |
Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary |
title_sort |
depth-habitat reorganization of planktonic foraminifera across the albian/cenomanian boundary |
publishDate |
2010 |
url |
http://hdl.handle.net/10088/11272 https://doi.org/10.1666/09027.1 |
genre |
North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Planktonic foraminifera |
op_relation |
Paleobiology Ando, Atsushi, Huber, Brian T., and MacLeod, Kenneth G. 2010. " Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary ." Paleobiology . 36 (3):357–373. https://doi.org/10.1666/09027.1 0094-8373 http://hdl.handle.net/10088/11272 90612 doi:10.1666/09027.1 |
op_doi |
https://doi.org/10.1666/09027.1 |
container_title |
Paleobiology |
container_volume |
36 |
container_issue |
3 |
container_start_page |
357 |
op_container_end_page |
373 |
_version_ |
1766131505760829440 |