globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-017-0327-8
Scopus记录号: 2-s2.0-85016400575
论文题名:
Climate-driven changes in energy and mass inputs systematically alter nutrient concentration and stoichiometry in deep and shallow regions of Lake Champlain
作者: Isles P.D.F.; Xu Y.; Stockwell J.D.; Schroth A.W.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 133, 期:2
起始页码: 201
结束页码: 217
语种: 英语
英文关键词: Climate change ; Lake Champlain ; N:P ; Nitrogen ; Phosphorus
Scopus关键词: climate change ; concentration (composition) ; cyanobacterium ; dissolved oxygen ; lacustrine environment ; nitrogen ; nutrient cycling ; nutrient dynamics ; phosphorus ; watershed ; wind velocity ; Lake Champlain ; Cyanobacteria
英文摘要: Concentrations of nitrogen (N) and phosphorus (P) in lakes may be differentially impacted by climate-driven changes in nutrient loading and by direct impacts of temperature and wind speed on internal nutrient cycling. Such changes may result in systematic shifts in lake N:P under future climate warming. We used 21 years of monitoring data to compare long-term and intra-annual trends in total N (TN), total P (TP) and TN:TP at 15 sites in Lake Champlain to concurrent measurements of watershed nutrient inputs and meteorological drivers. TN:TP declined sharply lake-wide, particularly in the past decade, yet the drivers of this trend varied based on site depth. In deep sites, declines were driven by changes in watershed loading of dissolved P and N and (in some cases) by decreases in hypolimnetic dissolved oxygen. In shallow sites, declines in TN:TP were primarily driven by long-term increases in temperature and decreases in wind speed, and exhibited systematic seasonal variability in TN:TP due to the timing of sediment P loading, N removal processes, and external nutrient inputs. We developed a conceptual model to explain the observed trends, and suggest that while climate drivers have affected nutrient dynamics in shallow and deep sites differently, both deep and shallow sites are likely to experience further declines in N:P and increases in cyanobacteria dominance if recent climate trends continue. © 2017, The Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83284
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: Rubenstein Ecosystem Science Laboratory, University of Vermont, Burlington, VT, United States; Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, VT, United States; Vermont EPSCoR, University of Vermont, Burlington, VT, United States; Department of Geology, University of Vermont, Burlington, VT, United States; Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden

Recommended Citation:
Isles P.D.F.,Xu Y.,Stockwell J.D.,et al. Climate-driven changes in energy and mass inputs systematically alter nutrient concentration and stoichiometry in deep and shallow regions of Lake Champlain[J]. Biogeochemistry,2017-01-01,133(2)
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