气候变化领域集成服务门户(CCPortal): Soil Organic Carbon Development and Turnover in Natural and Disturbed Salt Marsh Environments

CCPortal

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).