Comparing carbon accumulation in restored and natural wetland soils of coastal Louisiana |
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| Institution: | 1. U.S. Army Engineer Research and Development Center, Environmental Laboratory, Wetlands and Environmental Technologies Research Facility, ATTN: CEERD-EE-C, 3909 Halls Ferry Road, Vicksburg, MS, 39180-6199, USA;2. Louisiana State University, Department of Oceanography and Coastal Science, College of the Coast and Environment, Energy Coast and Environment Building, Baton Rouge, LA, 70803, USA;3. U.S. Army Engineer Research and Development Center, Environmental Laboratory, San Francisco, CA, USA;1. Institution of Land Utilization, Technology and Regional Planning, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary;2. Administration of Natural Resources Management, General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria;3. Department of Soil Sciences and Land Reclamation, Faculty of Agriculture, Al-Baath University, Homs, Syria;4. Department of Soil and Environment, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden;5. Institute of Research and Development, Duy Tan University, Danang, 550000, Viet Nam;6. Faculty of Environmental and Chemical Engineering, Duy Tan University, Danang, 550000, Viet Nam;7. Faculty of Water Resource Engineering, Thuyloi University, Hanoi, Viet Nam;8. Ho Chi Minh City University of Technology (HUTECH), 475A, Dien Bien Phu, Ward 25, Binh Thanh District, Ho Chi Minh City, Viet Nam;9. Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;1. Institute of Hydrology and Water Resources, Department of Hydraulic Engineering, School of Civil Engineering, Tsinghua University, Beijing 100084, China;2. Department of Mechanical Engineering, Aligarh Muslim University, Aligarh 202002, India;3. Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247667, India;1. Zhejiang Institute of Hydraulics and Estuary, Hangzhou 310020, China;2. Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing 210093, China;3. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China;4. Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China;5. Key Laboratory of Estuarine and Coastal Research in Zhejiang Province, Hangzhou 030020, China;1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest Agricultural and Forestry University, Yangling, Shannxi, 712100, China;2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling, Shaanxi, 712100, China;3. University of Chinese Academy of Sciences, Beijing, 100049, China;4. College of Life Sciences, Guizhou University, Guiyang, Guizhou, 550025, China |
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| Abstract: | Louisiana's chronic wetland deterioration has resulted in massive soil organic matter loss and subsequent carbon release through oxidation. To combat these losses, and reestablish ecosystem function, goods, and services, many restoration projects have been constructed or planned throughout coastal Louisiana. There are significant data gaps and conflicting results regarding wetland contributions to global warming, especially related to carbon sequestration in restored wetlands. An exceptionally large data set was used to derive carbon accumulation rates from key soil characteristics and processes. Assessments and comparisons of bulk density, organic matter, total carbon, vertical accretion (short- and longer-term), and carbon accumulation rates were made across time (chronosequence) and space (i.e., coastwide, watershed basins, and vegetation zones). Carbon accumulation rates in the Louisiana coastal zone were generally correlated to hydrogeomorphology, with higher rates occurring in zones of high river connectivity or in swamp or higher salinity tolerant marsh. On average, naturally occurring wetlands had higher carbon accumulation rates than restoration sites. Although some restoration measures were higher, and most showed increasing carbon accumulation rates over time. Results demonstrate that although wetland restoration provides many ecosystem benefits, the associated carbon sequestration may also provide useful measures for climate change management. |
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| Keywords: | Wetland productivity Chronosequence Carbon sequestration Wetland restoration Coastal Louisiana |
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