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DOI | 10.1029/2020GL090287 |
Soil Organic Carbon Development and Turnover in Natural and Disturbed Salt Marsh Environments | |
Luk S.Y.; Todd-Brown K.; Eagle M.; McNichol A.P.; Sanderman J.; Gosselin K.; Spivak A.C. | |
发表日期 | 2021 |
ISSN | 0094-8276 |
卷号 | 48期号:2 |
英文摘要 | Salt marsh survival with sea-level rise (SLR) increasingly relies on soil organic carbon (SOC) accumulation and preservation. Using a novel combination of geochemical approaches, we characterized fine SOC (≤1 mm) supporting marsh elevation maintenance. Overlaying thermal reactivity, source (δ13C), and age (F14C) information demonstrates several processes contributing to soil development: marsh grass production, redeposition of eroded material, and microbial reworking. Redeposition of old carbon, likely from creekbanks, represented ∼9%–17% of shallow SOC (≤26 cm). Soils stored marsh grass-derived compounds with a range of reactivities that were reworked over centuries-to-millennia. Decomposition decreases SOC thermal reactivity throughout the soil column while the decades-long disturbance of ponding accelerated this shift in surface horizons. Empirically derived estimates of SOC turnover based on geochemical composition spanned a wide range (640–9,951 years) and have the potential to inform predictions of marsh ecosystem evolution. © 2020. American Geophysical Union. All Rights Reserved. |
英文关键词 | Geochemistry; Organic carbon; Sea level; Soils; Ecosystem evolution; Geochemical approaches; Geochemical composition; Sea level rise; Soil development; Soil organic carbon; Surface horizons; Thermal reactivity; Wetlands; Hymenachne |
语种 | 英语 |
来源期刊 | Geophysical Research Letters |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/169208 |
作者单位 | Massachusetts Institute of Technology - Woods Hole Oceanographic Institution Joint Program in Oceanography and Applied Ocean Science and Engineering, Cambridge, MA, United States; Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Environmental Engineering Sciences, University of Florida, Gainesville, FL, United States; Woods Hole Coastal and Marine Science Center, U.S. Geological Survey, Woods Hole, MA, United States; Marine Geology and Geophysics Department, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Woods Hole Research Center, Falmouth, MA, United States; Department of Marine Sciences, University of Georgia, Athens, GA, United States |
推荐引用方式 GB/T 7714 | Luk S.Y.,Todd-Brown K.,Eagle M.,et al. Soil Organic Carbon Development and Turnover in Natural and Disturbed Salt Marsh Environments[J],2021,48(2). |
APA | Luk S.Y..,Todd-Brown K..,Eagle M..,McNichol A.P..,Sanderman J..,...&Spivak A.C..(2021).Soil Organic Carbon Development and Turnover in Natural and Disturbed Salt Marsh Environments.Geophysical Research Letters,48(2). |
MLA | Luk S.Y.,et al."Soil Organic Carbon Development and Turnover in Natural and Disturbed Salt Marsh Environments".Geophysical Research Letters 48.2(2021). |
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