期刊
ESTUARIES AND COASTS
卷 32, 期 5, 页码 871-892出版社
SPRINGER
DOI: 10.1007/s12237-009-9202-8
关键词
Autocompaction; Radiocarbon age determination; Sea level rise; Soil volume; Tidal freshwater marsh; Vertical accretion
资金
- CALFED Science Program of the State of California Resources Agency [F-O3-RE-029]
- US Department of Energy [DE-AC52-07NA27344]
The purpose of this study was to determine how vertical accretion rates in marshes vary through the millennia. Peat cores were collected in remnant and drained marshes in the Sacramento-San Joaquin Delta of California. Cubic smooth spline regression models were used to construct age-depth models and accretion histories for three remnant marshes. Estimated vertical accretion rates at these sites range from 0.03 to 0.49 cm year(-1). The mean contribution of organic matter to soil volume at the remnant marsh sites is generally stable (4.73% to 6.94%), whereas the mean contribution of inorganic matter to soil volume has greater temporal variability (1.40% to 7.92%). The hydrogeomorphic position of each marsh largely determines the inorganic content of peat. Currently, the remnant marshes are keeping pace with sea level rise, but this balance may shift for at least one of the sites under future sea level rise scenarios.
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