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Marine pollen records provide perspective on coastal wetlands through Quaternary sea-level changes.
- Source :
-
Ecological Indicators . Dec2021, Vol. 133, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
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Abstract
- • Succession from offshore archives to distinguish pollen signature of salt marshes. • Wetland expansions at Pearl River estuary closely linked with rapid sea-level rises. • Palaeoecological data suggest resilience of coastal wetlands to sea-level rises. • Marine pollen records may indicate the long-term coastal wetlands history. The response of coastal wetlands to future sea-level rise remains uncertain. Palaeoecological data are essential to constrain the still conflicting ecological models. However, obtaining detailed palaeo-coastal stratigraphic records before Holocene is often difficult due to repeated Quaternary marine transgression-regressions. Here we utilize pollen data from a deep-sea sedimentary archive in northern South China Sea to explore the historical behavior of coastal wetlands at a large river estuary over the last 140-kyr. A recurrent wetland (Cyperaceae)-pioneer species (Selaginella)-zonal forest (Pinus) succession throughout the last glacial-interglacial cycle implies a coastal salt marsh origin of the Cyperaceae pollen. Comparing with global sea-level reconstructions, the increases in Cyperaceae pollen abundance, and hence the expansions of coastal salt marsh, were found to be closely linked with rapid large-scale sea-level rises. This finding indicates a resilience of coastal wetlands to future sea-level rise, and highlights the probable importance of conventionally ignored horizontal adaptability in long-term survival of coastal wetlands. Overall, marine pollen records provide an opportunity to supplement existing palaeoecological observations of coastal wetlands during the Quaternary. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1470160X
- Volume :
- 133
- Database :
- Academic Search Index
- Journal :
- Ecological Indicators
- Publication Type :
- Academic Journal
- Accession number :
- 154243699
- Full Text :
- https://doi.org/10.1016/j.ecolind.2021.108405