DOI: 10.1007/s10533-014-9964-3
Scopus记录号: 2-s2.0-84900819557
论文题名: Environmental dynamics of dissolved black carbon in wetlands
作者: Ding Y. ; Cawley K.M. ; da Cunha C.N. ; Jaffé R.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 119, 期: 2018-01-03 起始页码: 259
结束页码: 273
语种: 英语
英文关键词: Biomass burning
; BPCA
; Dissolved black carbon
; Dissolved organic carbon
; Wetland
Scopus关键词: biomass burning
; black carbon
; carbon flux
; dissolved organic carbon
; environmental change
; fire history
; surface area
; wetland
; Botswana
; Everglades
; Florida [United States]
; Ngamiland
; Okavango Delta
; Pantanal
; United States
英文摘要: Wetlands are ecosystems commonly characterized by elevated levels of dissolved organic carbon (DOC), and although they cover a surface area less than 2 % worldwide, they are an important carbon source representing an estimated 15 % of global annual DOC flux to the oceans. Because of their unique hydrological characteristics, fire can be an important ecological driver in pulsed wetland systems. Consequently, wetlands may be important sources not only of DOC but also of products derived from biomass burning, such as dissolved black carbon (DBC). However, the biogeochemistry of DBC in wetlands has not been studied in detail. The objective of this study is to determine the environmental dynamics of DBC in different fire-impacted wetlands. An intensive, 2-year spatial and temporal dynamics study of DBC in a coastal wetland, the Everglades (Florida) system, as well as one-time sampling surveys for the other two inland wetlands, Okavango Delta (Botswana) and the Pantanal (Brazil), were reported. Our data reveal that DBC dynamics are strongly coupled with the DOC dynamics regardless of location, season or recent fire history. The statistically significant linear regression between DOC and DBC was applied to estimate DBC fluxes to the coastal zone through two main riverine DOC export routes in the Everglades ecosystem. The presence of significant amounts of DBC in these three fire-impacted ecosystems suggests that sub-tropical wetlands could represent an important continental-ocean carrier of combustion products from biomass burning. The discrimination of DBC molecular structure (i.e. aromaticity) between coastal and terrestrial samples, and between samples collected in wet and dry season, suggests that spatially-significant variation in DBC source strength and/or degree of degradation may also influence DBC dynamics. © 2014 Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83667
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Chemistry and Biochemistry, Marine Sciences Program, Florida International University, 3000 NE 151st St, North Miami, FL, 33181, United States; Southeast Environmental Research Center, Florida International University, Miami, FL, United States; Depto. Botânica e Ecologia, Núcleo de Estudos Ecológicos do Pantanal, Universidade Federal de Mato Grosso, Cuiaba, Brazil; Department of Civil, Environmental, and Architectural Engineering, The Institute for Arctic and Alpine Research (INSTAAR), University of Colorado at Boulder, Boulder, CO, United States
Recommended Citation:
Ding Y.,Cawley K.M.,da Cunha C.N.,et al. Environmental dynamics of dissolved black carbon in wetlands[J]. Biogeochemistry,2014-01-01,119(2018-01-03)