globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.14299
Scopus记录号: 2-s2.0-85051510131
论文题名:
Regional versus local drivers of water quality in the Windermere catchment, Lake District, United Kingdom: The dominant influence of wastewater pollution over the past 200 years
作者: Moorhouse H.L.; McGowan S.; Taranu Z.E.; Gregory-Eaves I.; Leavitt P.R.; Jones M.D.; Barker P.; Brayshaw S.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期:9
起始页码: 4009
结束页码: 4022
语种: 英语
英文关键词: algal assemblages ; climate change ; eutrophication ; landscape ; multiple stressors ; synchrony ; wastewater
Scopus关键词: algae ; Cyanobacteria
英文摘要: Freshwater ecosystems are threatened by multiple anthropogenic stressors acting over different spatial and temporal scales, resulting in toxic algal blooms, reduced water quality and hypoxia. However, while catchment characteristics act as a ‘filter’ modifying lake response to disturbance, little is known of the relative importance of different drivers and possible differentiation in the response of upland remote lakes in comparison to lowland, impacted lakes. Moreover, many studies have focussed on single lakes rather than looking at responses across a set of individual, yet connected lake basins. Here we used sedimentary algal pigments as an index of changes in primary producer assemblages over the last ~200 years in a northern temperate watershed consisting of 11 upland and lowland lakes within the Lake District, United Kingdom, to test our hypotheses about landscape drivers. Specifically, we expected that the magnitude of change in phototrophic assemblages would be greatest in lowland rather than upland lakes due to more intensive human activities in the watersheds of the former (agriculture, urbanization). Regional parameters, such as climate dynamics, would be the predominant factors regulating lake primary producers in remote upland lakes and thus, synchronize the dynamic of primary producer assemblages in these basins. We found broad support for the hypotheses pertaining to lowland sites as wastewater treatment was the main predictor of changes to primary producer assemblages in lowland lakes. In contrast, upland headwaters responded weakly to variation in atmospheric temperature, and dynamics in primary producers across upland lakes were asynchronous. Collectively, these findings show that nutrient inputs from point sources overwhelm climatic controls of algae and nuisance cyanobacteria, but highlights that large-scale stressors do not always initiate coherent regional lake response. Furthermore, a lake's position in its landscape, its connectivity and proximity to point nutrients are important determinants of changes in production and composition of phototrophic assemblages. © 2018 The Authors. Global Change Biology Published by John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110239
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: School of Geography, University of Nottingham, Nottingham, United Kingdom; Lancaster Environment Centre, Lancaster University, United Kingdom; Department of Biology, University of Ottawa, Ottawa, ON, Canada; Department of Biology, McGill University, Montréal, QC, Canada; Limnology Laboratory, Biology Department, University of Regina, Regina, SK, Canada; Institute of Environmental Change and Society, University of Regina, Regina, SK, Canada; Institute for Global Food Security, Queen's University Belfast, United Kingdom

Recommended Citation:
Moorhouse H.L.,McGowan S.,Taranu Z.E.,et al. Regional versus local drivers of water quality in the Windermere catchment, Lake District, United Kingdom: The dominant influence of wastewater pollution over the past 200 years[J]. Global Change Biology,2018-01-01,24(9)
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