气候变化领域集成服务门户(CCPortal): Recent Synchronous Declines in DIN:TP in Swedish Lakes

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DOI	10.1002/2017GB005722
	Recent Synchronous Declines in DIN:TP in Swedish Lakes
	Isles P.D.F.; Creed I.F.; Bergström A.-K.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	208
结束页码	225
卷号	32 期号:2
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.
英文关键词	boreal lakes; DIN:TP; nitrogen deposition; nitrogen limitation
语种	英语
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
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129860
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
推荐引用方式 GB/T 7714	Isles P.D.F.,Creed I.F.,Bergström A.-K.. Recent Synchronous Declines in DIN:TP in Swedish Lakes[J],2018,32(2).
APA	Isles P.D.F.,Creed I.F.,&Bergström A.-K..(2018).Recent Synchronous Declines in DIN:TP in Swedish Lakes.Global Biogeochemical Cycles,32(2).
MLA	Isles P.D.F.,et al."Recent Synchronous Declines in DIN:TP in Swedish Lakes".Global Biogeochemical Cycles 32.2(2018).