DOI: 10.1002/gbc.20036
Scopus记录号: 2-s2.0-84881103643
论文题名: Carbon evasion/accumulation ratio in boreal lakes is linked to nitrogen
作者: Kortelainen P ; , Rantakari M ; , Pajunen H ; , Mattsson T ; , Juutinen S ; , Larmola T ; , Alm J ; , Silvola J ; , Martikainen P ; J
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2013
卷: 27, 期: 2 起始页码: 363
结束页码: 374
语种: 英语
英文关键词: boreal lakes
; C evasion/accumulation
; carbon
; drivers
; nitrogen
; water chemistry
Scopus关键词: Boreal lakes
; C evasion/accumulation
; C sequestration
; Climatic drivers
; Contributing factor
; Lake waters
; Physical and chemical characteristics
; Water chemistry
; Carbon
; Carbon dioxide
; Nitrogen
; Truck drivers
; Lakes
; air-water interaction
; biogeochemistry
; Boreal
; carbon cycle
; carbon dioxide
; concentration (composition)
; lacustrine deposit
; lake water
; land use change
; landscape
; physicochemical property
; water chemistry
; Finland
英文摘要: The role of lakes in landscape carbon (C) cycling and primary drivers behind freshwater C balance have remained poorly known, although lakes are an important landscape component and cover 10% of Finland's total area. We studied CO2 evasion and average Holocene C accumulation in 82 boreal lakes (0.04-1540 km2; max depth 1-93 m) located between the latitudes 60°N and 69°N. Both CO2 evasion and C accumulation correlated with numerous drivers and were closely linked to lake area and maximum depth. The total aquatic C retention (C evasion + C accumulation) was largely determined by lake area (r2 = 0.96, p < 0.0001). Carbon in boreal lakes is mostly terrestrially fixed and our data demonstrate that boreal lakes are important conduits for transferring terrestrially fixed C to the atmosphere. C evasion/accumulation ratio (Cev/Cacc) ranged from 4 to 86 (on average 30) and correlated positively only with lake water NO 3-N concentration and maximum depth, and negatively with sediment N pool. Numerous possible important drivers like land use and climate as well as lake physical and chemical characteristics were compared to C balances. Our study might thus be valuable in trying to understand links between aquatic and terrestrial C cycling over boreal landscapes. Although climatic drivers generally play a key role in short-term C balance fluctuations, our data indicate nitrogen/fertility to be a key contributing factor to long term C balance - increasing Cev/Cacc and thus decreasing the role of lakes in landscape C sequestration in boreal zone. ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77622
Appears in Collections: 气候变化事实与影响
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作者单位: Finnish Environment Institute, P.O. Box 140, FI-00251 Helsinki, Finland; Geological Survey of Finland, Kuopio, Finland; Department of Environmental Sciences, University of Eastern Finland, Kuopio, Finland; Department of Biology, University of Joensuu, Joensuu, Finland; Finnish Forest Research Institute, Joensuu, Finland; Department of Environmental Sciences, University of Helsinki, Finland; Department of Forest Sciences, University of Helsinki, Finland; Environmental Studies Program, Mount Holyoke College, South Hadley, MA, United States
Recommended Citation:
Kortelainen P,, Rantakari M,, Pajunen H,et al. Carbon evasion/accumulation ratio in boreal lakes is linked to nitrogen[J]. Global Biogeochemical Cycles,2013-01-01,27(2)