DOI: 10.1016/j.quascirev.2014.02.010
Scopus记录号: 2-s2.0-84896293956
论文题名: Late Holocene vegetation, climate, and land-use impacts on carbon dynamics in the Florida Everglades
作者: Jones M.C. ; Bernhardt C.E. ; Willard D.A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 90 起始页码: 90
结束页码: 105
语种: 英语
英文关键词: Carbon
; Everglades
; Holocene
; Peatland
Scopus关键词: Fertilizers
; Forestry
; Tropics
; Water management
; Wetlands
; Anthropogenic changes
; Carbon accumulation
; Everglades
; Holocenes
; Management practices
; Medieval climate anomalies
; Peatland
; Vegetation community
; Carbon
; carbon sink
; climate variation
; grass
; Holocene
; hydroperiod
; land use change
; Medieval Warm Period
; peatland
; vegetation history
; Agriculture
; Carbon
; Fertilizers
; Tropics
; Water Management
; Wetlands
; Everglades
; Florida [United States]
; United States
英文摘要: Tropical and subtropical peatlands are considered a significant carbon sink. The Florida Everglades includes 6000-km2 of peat-accumulating wetland however, detailed carbon dynamics from different environments within the Everglades have not been extensively studied or compared. Here we present carbon accumulation rates from 13 cores and 4 different environments, including sawgrass ridges and sloughs, tree islands, and marl prairies, whose hydroperiods and vegetation communities differ. We find that the lowest rates of C accumulation occur in sloughs in the southern Everglades. The highest rates are found where hydroperiods are generally shorter, including near-tails of tree islands and drier ridges. Long-term average rates of 100 to >200gCm-2yr-1are as high, and in some cases, higher than rates recorded from the tropics and 10-20 times higher than boreal averages. C accumulation rates were impacted by both the Medieval Climate Anomaly and the Little Ice Age, but the largest impacts to C accumulation rates over the Holocene record have been the anthropogenic changes associated with expansion of agriculture and construction of canals and levees to control movement of surface water. Water management practices in the 20th century have altered the natural hydroperiods and fire regimes of the Everglades. The Florida Everglades as a whole has acted as a significant carbon sink over the mid- to late-Holocene, but reduction of the spatial extent of the original wetland area, as well as the alteration of natural hydrology in the late 19th and 20th centuries, have significantly reduced the carbon sink capacity of this subtropical wetland. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60334
Appears in Collections: 过去全球变化的重建
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作者单位: U.S. Geological Survey, Eastern Geology and Paleoclimate Science Center, Reston, VA 20192, United States
Recommended Citation:
Jones M.C.,Bernhardt C.E.,Willard D.A.. Late Holocene vegetation, climate, and land-use impacts on carbon dynamics in the Florida Everglades[J]. Quaternary Science Reviews,2014-01-01,90