Surface waters in the Florida Everglades contain high levels of dissolved organic carbon (DOC) compounds. delta(13)C values of DOC samples collected from the northern Everglades indicate that less than about 23% of the DOC was derived from sugarcane (the dominant agricultural crop in the area), and the amount of DOC from sugarcane was greater during the dry period. Most of the DOC (>50%) in the northern Everglades was in the low molecular weight (< 1000 Dalton) fraction (LMW-DOC). The relative amount of high molecular weight DOC (HMW-DOC) was higher in the wet period than in the dry period. Radiocarbon ages of the DOC ranged from "> modern" to about 2400 years B.P., indicating that DOC was derived from both historic peat deposits and modern vegetation. At each site, the HMW-DOC had older radiocarbon ages than the LMW-DOC, and therefore contained a greater fraction of DOC derived from the historic peat deposits. It appears that at least some of the old DOC compounds from the historic peat deposits were decomposed during their residence in the surface water system in the northern Everglades, and the LMW-DOC was more microbially labile than the HMW-DOC. Our analysis suggests that accelerated decomposition of organic matter in the historic peat deposits (due to land-use change) could be a significant source of DOC and nutrients in the northern Everglades. Our data also suggest that the radiocarbon signature of DOC could be used as a sensitive indicator of the overall effectiveness of a wetland restoration project.
机构:
US Geol Survey, Boulder, CO 80303 USA
Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USAUS Geol Survey, Boulder, CO 80303 USA
Poulin, Brett A.
Ryan, Joseph N.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USAUS Geol Survey, Boulder, CO 80303 USA
Ryan, Joseph N.
Nagy, Kathryn L.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Illinois, Dept Earth & Environm Sci, Chicago, IL 60607 USAUS Geol Survey, Boulder, CO 80303 USA
Nagy, Kathryn L.
Stubbins, Aron
论文数: 0引用数: 0
h-index: 0
机构:
Univ Georgia, Marine Sci Dept, Skidaway Inst Oceanog, Savannah, GA 31401 USAUS Geol Survey, Boulder, CO 80303 USA
Stubbins, Aron
论文数: 引用数:
h-index:
机构:
Dittmar, Thorsten
Orem, William
论文数: 0引用数: 0
h-index: 0
机构:
US Geol Survey, Reston, VA 20192 USAUS Geol Survey, Boulder, CO 80303 USA
Orem, William
Krabbenhoft, David P.
论文数: 0引用数: 0
h-index: 0
机构:
US Geol Survey, Middleton, WI 53562 USAUS Geol Survey, Boulder, CO 80303 USA
Krabbenhoft, David P.
Aiken, George R.
论文数: 0引用数: 0
h-index: 0
机构:
US Geol Survey, Boulder, CO 80303 USAUS Geol Survey, Boulder, CO 80303 USA
机构:
China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
CNPC Res Inst Safety & Environm Technol, State Key Lab Petr Pollut Control, Beijing 102249, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
Li, Yuguo
Wu, Baichun
论文数: 0引用数: 0
h-index: 0
机构:
China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
CNPC Res Inst Safety & Environm Technol, State Key Lab Petr Pollut Control, Beijing 102249, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
Wu, Baichun
He, Chen
论文数: 0引用数: 0
h-index: 0
机构:
China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
He, Chen
Nie, Fan
论文数: 0引用数: 0
h-index: 0
机构:
CNPC Res Inst Safety & Environm Technol, State Key Lab Petr Pollut Control, Beijing 102249, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
Nie, Fan
Shi, Quan
论文数: 0引用数: 0
h-index: 0
机构:
China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R ChinaChina Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
机构:
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing,102249, China
State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing,102249, China
CNPC Research Institute of Safety and Environmental Technology Co., Ltd, Beijing, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing,102249, China
Li, Yuguo
Wu, Baichun
论文数: 0引用数: 0
h-index: 0
机构:
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing,102249, China
State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing,102249, China
CNPC Research Institute of Safety and Environmental Technology Co., Ltd, Beijing, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing,102249, China
Wu, Baichun
He, Chen
论文数: 0引用数: 0
h-index: 0
机构:
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing,102249, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing,102249, China
He, Chen
Nie, Fan
论文数: 0引用数: 0
h-index: 0
机构:
State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing,102249, China
CNPC Research Institute of Safety and Environmental Technology Co., Ltd, Beijing, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing,102249, China
Nie, Fan
Shi, Quan
论文数: 0引用数: 0
h-index: 0
机构:
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing,102249, ChinaState Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing,102249, China
机构:
Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Univ So Mississippi, Dept Marine Sci, Stennis Space Ctr, MS 39529 USAXiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Cai, Yihua
Guo, Laodong
论文数: 0引用数: 0
h-index: 0
机构:
Univ So Mississippi, Dept Marine Sci, Stennis Space Ctr, MS 39529 USAXiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Guo, Laodong
Wang, Xuri
论文数: 0引用数: 0
h-index: 0
机构:
Univ So Mississippi, Dept Marine Sci, Stennis Space Ctr, MS 39529 USAXiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Wang, Xuri
Mojzis, Allison K.
论文数: 0引用数: 0
h-index: 0
机构:
Univ So Mississippi, Dept Marine Sci, Stennis Space Ctr, MS 39529 USAXiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Mojzis, Allison K.
Redalje, Donald G.
论文数: 0引用数: 0
h-index: 0
机构:
Univ So Mississippi, Dept Marine Sci, Stennis Space Ctr, MS 39529 USAXiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China