DOI: 10.1111/gcb.13076
论文题名: Asynchronous onset of eutrophication among shallow prairie lakes of the Northern Great Plains, Alberta, Canada
作者: Maheaux H. ; Leavitt P.R. ; Jackson L.J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 1 起始页码: 271
结束页码: 283
语种: 英语
英文关键词: Anthropocene
; Climate
; Cyanobacteria
; Eutrophication
; Great Acceleration
; Lake
; Land use
; Prairies
; Water quality
Scopus关键词: Anthropocene
; atmospheric deposition
; cyanobacterium
; eutrophication
; fertilization (reproduction)
; global warming
; nutrient dynamics
; prairie
; Alberta
; Canada
; Great Plains
; algae
; Chromatiaceae
; Cyanobacteria
; fertilizer
; fresh water
; pigment
; agriculture
; Alberta
; chemistry
; climate change
; cyanobacterium
; environmental monitoring
; eukaryote
; eutrophication
; growth, development and aging
; lake
; microbiology
; sediment
; water quality
; Agriculture
; Alberta
; Climate Change
; Cyanobacteria
; Environmental Monitoring
; Eukaryota
; Eutrophication
; Fertilizers
; Fresh Water
; Geologic Sediments
; Lakes
; Pigments, Biological
; Water Quality
英文摘要: Coherent timing of agricultural expansion, fertilizer application, atmospheric nutrient deposition, and accelerated global warming is expected to promote synchronous fertilization of regional surface waters and coherent development of algal blooms and lake eutrophication. While broad-scale cyanobacterial expansion is evident in global meta-analyses, little is known of whether lakes in discrete catchments within a common lake district also exhibit coherent water quality degradation through anthropogenic forcing. Consequently, the primary goal of this study was to determine whether agricultural development since ca. 1900, accelerated use of fertilizer since 1960, atmospheric deposition of reactive N, or regional climate warming has resulted in coherent patterns of eutrophication of surface waters in southern Alberta, Canada. Unexpectedly, analysis of sedimentary pigments as an index of changes in total algal abundance since ca. 1850 revealed that while total algal abundance (as β-carotene, pheophytin a) increased in nine of 10 lakes over 150 years, the onset of eutrophication varied by a century and was asynchronous across basins. Similarly, analysis of temporal sequences with least-squares regression revealed that the relative abundance of cyanobacteria (echinenone) either decreased or did not change significantly in eight of the lakes since ca. 1850, whereas purple sulfur bacteria (as okenone) increased significantly in seven study sites. These patterns are consistent with the catchment filter hypothesis, which posits that lakes exhibit unique responses to common forcing associated with the influx of mass as water, nutrients, or particles. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61521
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, AB, Canada; Limnology Laboratory, Department of Biology, University of Regina, Regina, SK, Canada
Recommended Citation:
Maheaux H.,Leavitt P.R.,Jackson L.J.. Asynchronous onset of eutrophication among shallow prairie lakes of the Northern Great Plains, Alberta, Canada[J]. Global Change Biology,2016-01-01,22(1)