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|Title:||Early and late Holocene paleoenvironmental reconstruction of the Pearl River estuary, South China Sea using foraminiferal assemblages and stable carbon isotopes||Authors:||Chen, Huixian
Khan, Nicole S.
Horton, Benjamin Peter
|Keywords:||Engineering::Environmental engineering||Issue Date:||2019||Source:||Chen, H., Wang, J., Khan, N. S., Waxi, L., Wu, J., Zhai, Y., . . . Horton, B. P. (2019). Early and late Holocene paleoenvironmental reconstruction of the Pearl River estuary, South China Sea using foraminiferal assemblages and stable carbon isotopes. Estuarine, Coastal and Shelf Science, 222, 112-125. doi:10.1016/j.ecss.2019.04.002||Journal:||Estuarine, Coastal and Shelf Science||Abstract:||Proxy reconstructions of estuarine evolution provide perspectives on regional to global environmental changes, including relative sea-level changes, climatic changes, and agricultural developments. Here, we present a new benthic foraminiferal record along with δ13C and C/N, and lithological data from a sediment core in the Pearl River estuary (Lingding Bay) adjacent to the South China Sea. The core has relatively thick Holocene sediments (>40 m) due to its location in the paleo-valley of the Pearl River. The lithologic and foraminiferal record reveal an evolution in paleoenvironment from fluvial, inner estuary to middle estuary between 11300 and 8100 cal a BP in response to rapid sea-level rise. δ13C and C/N data indicate high freshwater discharge from 10500 to 8100 cal a BP driven by a strong Asian monsoon. The middle Holocene (8100 - 3300 cal a BP) sediment is absent in the core due to subaqueous erosion resulting from the unique geomorphology of the Pearl River Delta. In the late Holocene from 3300 cal a BP to the present, the lithology and foraminiferal assemblages suggest a further evolution from outer estuary, middle estuary channel, to middle estuary shoal, resulting from deltaic progradation under stable relative sea levels. In the last 2000 years, δ13C and C/N values reveal the intensive development of agriculture coupled with the reduction of freshwater input derived from a weakening Asian monsoon.||URI:||https://hdl.handle.net/10356/143795||ISSN:||0272-7714||DOI:||10.1016/j.ecss.2019.04.002||Rights:||© 2019 Elsevier Ltd. All rights reserved. This paper was published in Estuarine, Coastal and Shelf Science and is made available with permission of Elsevier Ltd.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||ASE Journal Articles|
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