DOI: 10.1111/gcb.12371
论文题名: Long-term changes in hypoxia and soluble reactive phosphorus in the hypolimnion of a large temperate lake: Consequences of a climate regime shift
作者: North R.P. ; North R.L. ; Livingstone D.M. ; Köster O. ; Kipfer R.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 3 起始页码: 811
结束页码: 823
语种: 英语
英文关键词: Climate change
; Internal phosphorus loading
; Mixing dynamics
; Nutrients
; Oligotrophication
; Oxygen
; Wavelet analysis
Scopus关键词: climate change
; climate forcing
; concentration (composition)
; environmental change
; eutrophication
; hypolimnion
; hypoxia
; long-term change
; nutrient
; oxygen
; phosphorus
; trophic status
; wavelet analysis
; Switzerland
; Zurichsee
; oxygen
; phosphorus
; article
; chemistry
; climate change
; environmental monitoring
; internal phosphorus loading
; lake
; mixing dynamics
; Nutrients
; oligotrophication
; solubility
; Switzerland
; wavelet analysis
; climate change
; internal phosphorus loading
; mixing dynamics
; nutrients
; oligotrophication
; oxygen
; wavelet analysis
; Climate Change
; Environmental Monitoring
; Lakes
; Oxygen
; Phosphorus
; Solubility
; Switzerland
英文摘要: The (Lower) Lake of Zurich provides an ideal system for studying the long-term impact of environmental change on deep-water hypoxia because of its sensitivity to climatic forcing, its history of eutrophication and subsequent oligotrophication, and the quality and length of its data set. Based on 39 years (1972-2010) of measured profiles of temperature, oxygen concentration and phosphorus (P) concentration, the potentially confounding effects of oligotrophication and climatic forcing on the occurrence and extent of deep-water hypoxia in the lake were investigated. The time-series of Nürnberg's hypoxic factor (HF) for the lake can be divided into three distinct segments: (i) a segment of consistently low HF from 1972 to the late-1980s climate regime shift (CRS); (ii) a transitional segment between the late-1980s CRS and approximately 2000 within which the HF was highly variable; and (iii) a segment of consistently high HF thereafter. The increase in hypoxia during the study period was not a consequence of a change in trophic status, as the lake underwent oligotrophication as a result of reduced external P loading during this time. Instead, wavelet analysis suggests that changes in the lake's mixing regime, initiated by the late-1980s CRS, ultimately led to a delayed but abrupt decrease in the deep-water oxygen concentration, resulting in a general expansion of the hypoxic zone in autumn. Even after detrending to remove long-term effects, the concentration of soluble reactive P in the bottom water of the lake was highly correlated with various measures of hypoxia, providing quantitative evidence supporting the probable effect of hypoxia on internal P loading. Such climate-induced, ecosystem-scale changes, which may result in undesirable effects such as a decline in water quality and a reduction in coldwater fish habitats, provide further evidence for the vulnerability of large temperate lakes to predicted increases in global air temperature. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61979
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Water Resources and Drinking Water, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133, CH-8600 Dübendorf, Switzerland; Department of Environmental Systems Science, Institute of Biogeochemistry and Pollution Dynamics, ETH Zurich, Universitätstrasse 16, CH-8092 Zürich, Switzerland; Department of Biology and Global Institute for Water Security, University of Saskatchewan, 112 Science Place, Saskatoon, SK SN7 5E3, Canada; City of Zurich Water Supply, Hardhof 9, P.O. Box 1179, CH-8021 Zürich, Switzerland
Recommended Citation:
North R.P.,North R.L.,Livingstone D.M.,et al. Long-term changes in hypoxia and soluble reactive phosphorus in the hypolimnion of a large temperate lake: Consequences of a climate regime shift[J]. Global Change Biology,2014-01-01,20(3)