File Download
Supplementary

Conference Paper: Cenozoic dynamics of shallow-marine biodiversity in the Western Pacific

TitleCenozoic dynamics of shallow-marine biodiversity in the Western Pacific
Authors
KeywordsBiodiversity hotspot
Cenozoic
Coral Triangle
Indo-Australian Archipelago
Latitudinal diversity gradients
Issue Date2016
PublisherAmerican Geophysical Union.
Citation
American Geophysical Union (AGU) Fall Meeting, San Francisco, USA, 12-16 December 2016 How to Cite?
AbstractCenozoic dynamics of large-scale species diversity patterns remain poorly understood, especially for the Western Pacific, in part because of the paucity of well-dated fossil records from the tropics. Here we show the spatiotemporal dynamics of species diversity in the Western Pacific through the Cenozoic, focusing on the tropical Indo-Australian Archipelago (IAA) biodiversity hotspot. We analysed well-preserved fossil ostracodes from the tropical Western Pacific and combined their diversity data with other published data from the region to reconstruct Cenozoic dynamics of species diversity in the tropical- and northwestern Pacific Ocean. We fit generalized additive models to test for differences in richness over time and across geographic regions while accounting for sample size variation among samples. Low-, mid- and high-latitude regions all show a similar diversity trajectory: diversity is low in the Eocene and Oligocene, increases from the Early Miocene to the Plio-Pleistocene but then declines to the present day. Present day high biodiversity in these regions was established during the Pliocene with a remarkable diversification at that time. Latitudinal diversity patterns are relatively flat and never show as simple decline from the tropics to higher latitudes. Western Pacific Cenozoic ostracodes exhibit a spatiotemporal pattern of species diversity that is inconsistent with the commonly reported and persistent pattern of declining diversity from the tropics to the extratropics. While this inconsistency could be interpreted as evidence that ostracodes are a contrarian clade, Atlantic ostracodes display a standard latitudinal species diversity gradient. Contrasting patterns between oceans suggests an important role for regional factors (e.g., plate tectonics and temporal geomorphological dynamics) in shaping the biodiversity of the Western Pacific.
DescriptionSession: Paleoceanography and Paleoclimatology: PP43A Paleoclimate Variability in the Indo-Pacific Region III Posters - no. PP43A-2293
Persistent Identifierhttp://hdl.handle.net/10722/241816

 

DC FieldValueLanguage
dc.contributor.authorYasuhara, M-
dc.contributor.authorIwatani, H-
dc.contributor.authorHunt, G-
dc.contributor.authorOkahashi, H-
dc.contributor.authorKase, T-
dc.contributor.authorHayashi, H-
dc.contributor.authorIrizuki, T-
dc.contributor.authorAguilar, YM-
dc.contributor.authorFernando, AGS-
dc.contributor.authorRenema, W-
dc.date.accessioned2017-06-20T01:48:57Z-
dc.date.available2017-06-20T01:48:57Z-
dc.date.issued2016-
dc.identifier.citationAmerican Geophysical Union (AGU) Fall Meeting, San Francisco, USA, 12-16 December 2016-
dc.identifier.urihttp://hdl.handle.net/10722/241816-
dc.descriptionSession: Paleoceanography and Paleoclimatology: PP43A Paleoclimate Variability in the Indo-Pacific Region III Posters - no. PP43A-2293-
dc.description.abstractCenozoic dynamics of large-scale species diversity patterns remain poorly understood, especially for the Western Pacific, in part because of the paucity of well-dated fossil records from the tropics. Here we show the spatiotemporal dynamics of species diversity in the Western Pacific through the Cenozoic, focusing on the tropical Indo-Australian Archipelago (IAA) biodiversity hotspot. We analysed well-preserved fossil ostracodes from the tropical Western Pacific and combined their diversity data with other published data from the region to reconstruct Cenozoic dynamics of species diversity in the tropical- and northwestern Pacific Ocean. We fit generalized additive models to test for differences in richness over time and across geographic regions while accounting for sample size variation among samples. Low-, mid- and high-latitude regions all show a similar diversity trajectory: diversity is low in the Eocene and Oligocene, increases from the Early Miocene to the Plio-Pleistocene but then declines to the present day. Present day high biodiversity in these regions was established during the Pliocene with a remarkable diversification at that time. Latitudinal diversity patterns are relatively flat and never show as simple decline from the tropics to higher latitudes. Western Pacific Cenozoic ostracodes exhibit a spatiotemporal pattern of species diversity that is inconsistent with the commonly reported and persistent pattern of declining diversity from the tropics to the extratropics. While this inconsistency could be interpreted as evidence that ostracodes are a contrarian clade, Atlantic ostracodes display a standard latitudinal species diversity gradient. Contrasting patterns between oceans suggests an important role for regional factors (e.g., plate tectonics and temporal geomorphological dynamics) in shaping the biodiversity of the Western Pacific.-
dc.languageeng-
dc.publisherAmerican Geophysical Union.-
dc.relation.ispartofAmerican Geophysical Union Fall Meeting-
dc.rightsCopyright 2016 American Geophysical Union. Further reproduction or electronic distribution is not permitted.-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectBiodiversity hotspot-
dc.subjectCenozoic-
dc.subjectCoral Triangle-
dc.subjectIndo-Australian Archipelago-
dc.subjectLatitudinal diversity gradients-
dc.titleCenozoic dynamics of shallow-marine biodiversity in the Western Pacific-
dc.typeConference_Paper-
dc.identifier.emailYasuhara, M: yasuhara@hku.hk-
dc.identifier.emailIwatani, H: iwatani@hku.hk-
dc.identifier.authorityYasuhara, M=rp01474-
dc.description.naturepublished_or_final_version-
dc.identifier.hkuros272809-
dc.publisher.placeUnited States-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats