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Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary

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dc.contributor.author Ando, Atsushi en
dc.contributor.author Huber, Brian T. en
dc.contributor.author MacLeod, Kenneth G. en
dc.date.accessioned 2010-11-26T19:35:35Z
dc.date.available 2010-11-26T19:35:35Z
dc.date.issued 2010
dc.identifier.citation Ando, Atsushi, Huber, Brian T., and MacLeod, Kenneth G. 2010. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F11272">Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary</a>." <em>Paleobiology</em>. 36 (3):357&ndash;373. <a href="https://doi.org/10.1666/09027.1">https://doi.org/10.1666/09027.1</a> en
dc.identifier.issn 0094-8373
dc.identifier.uri http://hdl.handle.net/10088/11272
dc.description.abstract 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. en
dc.relation.ispartof Paleobiology en
dc.title Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary en
dc.type Journal Article en
dc.identifier.srbnumber 90612
dc.identifier.doi 10.1666/09027.1
rft.jtitle Paleobiology
rft.volume 36
rft.issue 3
rft.spage 357
rft.epage 373
dc.description.SIUnit NH-Paleobiology en
dc.description.SIUnit NMNH en
dc.citation.spage 357
dc.citation.epage 373

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