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Article: Abrupt climate change and collapse of deep-sea ecosystems

TitleAbrupt climate change and collapse of deep-sea ecosystems
Authors
KeywordsDeglacial-Holocene
Macroecology
Ostracoda
Paleoceanography
Species diversity
Issue Date2008
PublisherNational Academy of Sciences. The Journal's web site is located at http://www.pnas.org
Citation
Proceedings Of The National Academy Of Sciences Of The United States Of America, 2008, v. 105 n. 5, p. 1556-1560 How to Cite?
AbstractWe investigated the deep-sea fossil record of benthic ostracodes during periods of rapid climate and oceanographic change over the past 20,000 years in a core from intermediate depth in the northwestern Atlantic. Results show that deep-sea benthic community "collapses" occur with faunal turnover of up to 50% during major climatically driven oceanographic changes. Species diversity as measured by the Shannon-Wiener index falls from 3 to as low as 1.6 during these events. Major disruptions in the benthic communities commenced with Heinrich Event 1, the Inter-Allerød Cold Period (IACP: 13.1 ka), the Younger Dryas (YD: 12.9-11.5 ka), and several Holocene Bond events when changes in deep-water circulation occurred. The largest collapse is associated with the YD/IACP and is characterized by an abrupt two-step decrease in both the upper North Atlantic Deep Water assemblage and species diversity at 13.1 ka and at 12.2 ka. The ostracode fauna at this site did not fully recover until ≈8 ka, with the establishment of Labrador Sea Water ventilation. Ecologically opportunistic slope species prospered during this community collapse. Other abrupt community collapses during the past 20 ka generally correspond to millennial climate events. These results indicate that deep-sea ecosystems are not immune to the effects of rapid climate changes occurring over centuries or less. © 2008 by The National Academy of Sciences of the USA.
Persistent Identifierhttp://hdl.handle.net/10722/132792
ISSN
2015 Impact Factor: 9.423
2015 SCImago Journal Rankings: 6.883
PubMed Central ID
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYasuhara, Men_HK
dc.contributor.authorCronin, TMen_HK
dc.contributor.authorDemenocal, PBen_HK
dc.contributor.authorOkahashi, Hen_HK
dc.contributor.authorLinsley, BKen_HK
dc.date.accessioned2011-03-28T09:29:07Z-
dc.date.available2011-03-28T09:29:07Z-
dc.date.issued2008en_HK
dc.identifier.citationProceedings Of The National Academy Of Sciences Of The United States Of America, 2008, v. 105 n. 5, p. 1556-1560en_HK
dc.identifier.issn0027-8424en_HK
dc.identifier.urihttp://hdl.handle.net/10722/132792-
dc.description.abstractWe investigated the deep-sea fossil record of benthic ostracodes during periods of rapid climate and oceanographic change over the past 20,000 years in a core from intermediate depth in the northwestern Atlantic. Results show that deep-sea benthic community "collapses" occur with faunal turnover of up to 50% during major climatically driven oceanographic changes. Species diversity as measured by the Shannon-Wiener index falls from 3 to as low as 1.6 during these events. Major disruptions in the benthic communities commenced with Heinrich Event 1, the Inter-Allerød Cold Period (IACP: 13.1 ka), the Younger Dryas (YD: 12.9-11.5 ka), and several Holocene Bond events when changes in deep-water circulation occurred. The largest collapse is associated with the YD/IACP and is characterized by an abrupt two-step decrease in both the upper North Atlantic Deep Water assemblage and species diversity at 13.1 ka and at 12.2 ka. The ostracode fauna at this site did not fully recover until ≈8 ka, with the establishment of Labrador Sea Water ventilation. Ecologically opportunistic slope species prospered during this community collapse. Other abrupt community collapses during the past 20 ka generally correspond to millennial climate events. These results indicate that deep-sea ecosystems are not immune to the effects of rapid climate changes occurring over centuries or less. © 2008 by The National Academy of Sciences of the USA.en_HK
dc.languageengen_US
dc.publisherNational Academy of Sciences. The Journal's web site is located at http://www.pnas.orgen_HK
dc.relation.ispartofProceedings of the National Academy of Sciences of the United States of Americaen_HK
dc.subjectDeglacial-Holoceneen_HK
dc.subjectMacroecologyen_HK
dc.subjectOstracodaen_HK
dc.subjectPaleoceanographyen_HK
dc.subjectSpecies diversityen_HK
dc.titleAbrupt climate change and collapse of deep-sea ecosystemsen_HK
dc.typeArticleen_HK
dc.identifier.emailYasuhara, M: yasuhara@hku.hken_HK
dc.identifier.authorityYasuhara, M=rp01474en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1073/pnas.0705486105en_HK
dc.identifier.pmid18227517-
dc.identifier.pmcidPMC2234183-
dc.identifier.scopuseid_2-s2.0-40349089640en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-40349089640&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume105en_HK
dc.identifier.issue5en_HK
dc.identifier.spage1556en_HK
dc.identifier.epage1560en_HK
dc.identifier.eissn1091-6490-
dc.identifier.isiWOS:000253077900033-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridYasuhara, M=7102069020en_HK
dc.identifier.scopusauthoridCronin, TM=7102710042en_HK
dc.identifier.scopusauthoridDemenocal, PB=6602677728en_HK
dc.identifier.scopusauthoridOkahashi, H=23971420100en_HK
dc.identifier.scopusauthoridLinsley, BK=6603687732en_HK
dc.identifier.citeulike2351656-

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