气候变化领域集成服务门户(CCPortal): δ13C records from fish fossils as paleo-indicators of ecosystem responses to lake levels in the Plio-Pleistocene lakes of Tugen Hills; Kenya

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DOI	10.1016/j.palaeo.2019.109466
	δ13C records from fish fossils as paleo-indicators of ecosystem responses to lake levels in the Plio-Pleistocene lakes of Tugen Hills; Kenya
	Billingsley A.L.; Reinthal P.; Dettman D.L.; Kingston J.D.; Deino A.L.; Ortiz K.; Mohler B.; Cohen A.S.
发表日期	2020
ISSN	0031-0182
英文摘要	The carbon isotopic ratios of organic matter in fish fossils from diatomites and other lake beds in the HSPDP drill core from Tugen Hills, Kenya (2.56–3.29 Ma) reflect trophic resource uses and can indicate the dietary habitats of fish in the paleolake. This information offers insight into how fish communities responded to lake-level fluctuations during the Plio-Pleistocene in the East African Rift Valley. We have compared this record with fish fossil isotopes from both a previously published study of a Lake Malawi drill core (139 ka - present) and core top (modern ca 1978) samples collected at the water/sediment boundary from Lake Turkana (Kenya) of known environmental provenance. Both the Lake Malawi drill core fossils (−7.2‰ to −27.5‰ VPDB) and modern Lake Turkana samples (−16‰ to −24.6‰ VPDB) have δ13C values indicating a mix of near-shore and deep-water pelagic species. In contrast, the δ13C values for the Tugen Hills core fossils vary only between −20‰ and −27‰ VPDB. The absence of δ13C values greater than −19‰ suggests none of these fossils are derived from near-shore benthic habitats. The lack of shallow water, benthic lacustrine fish fossils through the Tugen Hills lake cycles may indicate that the rate of change from low-lake stands to deeper lake phases was very rapid, and shallow water communities were not established for long enough to leave a fish fossil record at the core site. These results strongly suggest that lake-level responses to climate variability in the Baringo Basin of the East African Rift were very abrupt during the Plio-Pleistocene transition. © 2019
英文关键词	East African lakes; Fish habitats; Fish paleoecology; Isotopic geochemistry; Plio-Pleistocene climate
语种	英语
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150725
作者单位	Department of Geosciences, University of Arizona, Tucson, AZ, United States; Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, United States; Department of Anthropology, University of Michigan, Ann Arbor, MI, United States; Berkeley Geochronology Center, Berkeley, CA, United States; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States
推荐引用方式 GB/T 7714	Billingsley A.L.,Reinthal P.,Dettman D.L.,et al. δ13C records from fish fossils as paleo-indicators of ecosystem responses to lake levels in the Plio-Pleistocene lakes of Tugen Hills; Kenya[J],2020.
APA	Billingsley A.L..,Reinthal P..,Dettman D.L..,Kingston J.D..,Deino A.L..,...&Cohen A.S..(2020).δ13C records from fish fossils as paleo-indicators of ecosystem responses to lake levels in the Plio-Pleistocene lakes of Tugen Hills; Kenya.Palaeogeography, Palaeoclimatology, Palaeoecology.
MLA	Billingsley A.L.,et al."δ13C records from fish fossils as paleo-indicators of ecosystem responses to lake levels in the Plio-Pleistocene lakes of Tugen Hills; Kenya".Palaeogeography, Palaeoclimatology, Palaeoecology (2020).