DOI: 10.1007/s10533-016-0264-y
Scopus记录号: 2-s2.0-84992200967
论文题名: Effects of glaciers on nutrient concentrations and phytoplankton in lakes within the Northern Cascades Mountains (USA)
作者: Williams J.J. ; Nurse A. ; Saros J.E. ; Riedel J. ; Beutel M.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
起始页码: 1
结束页码: 13
语种: 英语
英文关键词: Cascades
; Glacier melting
; Mountain lakes
; National park
; Nitrate
; Phytoplankton
英文摘要: We compared nitrate concentrations, phytoplankton biomass, and phytoplankton community structure in lakes fed by glacier melt and snowmelt (GSF lakes) and by snowmelt only (SF lakes) within North Cascades National Park (NOCA) in Washington State, USA. In the U.S. Rocky Mountains, glacier melting has greatly increased nitrate concentrations in GSF lakes (52–236 µg NO3–N L−1) relative to SF lakes (1–14 µg NO3–N L−1) and thereby stimulated phytoplankton changes in GSF lakes. Considering NOCA contains approximately one-third of the glaciers in the continental U.S., and many mountain lakes that receive glacier meltwater inputs, we hypothesized that NOCA GSF lakes would have greater nitrate concentrations, greater phytoplankton biomass, and greater abundance of nitrogen-sensitive diatom species than NOCA SF lakes. However, at NOCA nitrate concentrations were much lower and differences between lake types were small compared to the Rockies. At NOCA, nitrate concentrations averaged 13 and 5 µg NO3–N L−1 in GSF and SF lakes, respectively, and a nitrate difference was not detectable in several individual years. There also was no difference in phytoplankton biomass or abundance of nitrogen-sensitive diatoms between lake types at NOCA. In contrast to the Rockies, there also was not a significant positive relationship between watershed percent glacier area and lake nitrate at NOCA. Results demonstrate that biogeochemical responses to global change in Western U.S. mountain lake watersheds may vary regionally. Regional differences may be affected by differing nitrogen deposition, climate, geology, or microbial processes within glacier environments, and merit further investigation. © 2016 Springer International Publishing Switzerland Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83349
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 Civil & Environmental Engineering, Washington State University, Pullman, WA, United States; Climate Change Institute, University of Maine, Orono, ME, United States; National Park Service, North Cascades National Park Service Complex, Sedro-Wooley, WA, United States; School of Engineering, University of California, Merced, United States
Recommended Citation:
Williams J.J.,Nurse A.,Saros J.E.,et al. Effects of glaciers on nutrient concentrations and phytoplankton in lakes within the Northern Cascades Mountains (USA)[J]. Biogeochemistry,2016-01-01