DOI: 10.1002/2017GB005722
Scopus记录号: 2-s2.0-85042130022
论文题名: Recent Synchronous Declines in DIN:TP in Swedish Lakes
作者: Isles P ; D ; F ; , Creed I ; F ; , Bergström A ; -K
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2018
卷: 32, 期: 2 起始页码: 208
结束页码: 225
语种: 英语
英文关键词: boreal lakes
; DIN:TP
; nitrogen deposition
; nitrogen limitation
Scopus关键词: annual variation
; atmospheric deposition
; atmospheric gas
; dissolved inorganic nitrogen
; freshwater ecosystem
; headwater
; nutrient limitation
; organic carbon
; phosphorus
; subarctic region
; total organic carbon
; North America
; Sweden
英文摘要: Declining atmospheric nitrogen (N) deposition in northern Europe and parts of North America, coupled with ongoing changes in climate, has the potential to alter the nutrient limitation status of freshwater ecosystems. In this study we compared time series data of atmospheric N deposition, air temperature, and precipitation with corresponding estimates of dissolved inorganic nitrogen (DIN), total phosphorus (TP), DIN:TP, and total organic carbon from 78 headwater streams and 95 nutrient-poor lakes in Sweden from 1998 to 2013 to assess trends in, and potential drivers of, lake N:P ratios. We found that trends in nutrients were variable at the scale of individual lakes but were highly synchronous at the regional scale, suggesting underlying control by broad-scale environmental drivers mediated by site-specific characteristics. Widespread declines in lake DIN throughout Sweden were correlated with declines in atmospheric N deposition, particularly in northern areas. TP did not have strong directional trends, but interannual variability was synchronous at regional scales, implying that broad-scale climate drivers were affecting these trends. Overall, we observed a significant decline in DIN:TP throughout Sweden over the monitoring period. At the beginning of the study period, 32% of lakes were N limited and 45% colimited by N and P. Proportions increased to 63% of lakes N limited and 20% colimited by N and P at the end of the study period. These results suggest that N limitation is likely to become more widespread in subarctic and boreal areas of Europe in the future if recent trends continue. ©2018. 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/77664
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden; School of Environment and Sustainability, University of Saskatchewan, Saskatoon, SK, Canada
Recommended Citation:
Isles P,D,F,et al. Recent Synchronous Declines in DIN:TP in Swedish Lakes[J]. Global Biogeochemical Cycles,2018-01-01,32(2)