干旱区生态环境知识资源中心(Arid): Blooms and flows: Effects of variable hydrology and management on reservoir water quality

Arid

DOI	10.1002/ecs2.4472
	Blooms and flows: Effects of variable hydrology and management on reservoir water quality
	Painter, Kristin J.; Venkiteswaran, Jason J.; Baulch, Helen M.
通讯作者	Painter, KJ
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2023
卷号	14 期号:3
英文摘要	Flow management has the potential to significantly affect ecosystem condition. Shallow lakes in arid regions are especially susceptible to flow management changes, which can have important implications for the formation of cyanobacterial blooms. Here, we reveal water quality shifts associated with changing source water inflow management. Using in situ monitoring data, we studied a seven-year time span during which inflows to a shallow, eutrophic drinking water reservoir transitioned from primarily natural landscape runoff (2014-2015) to managed flows from a larger upstream reservoir (Lake Diefenbaker; 2016-2020) and identified significant changes in cyanobacteria (as phycocyanin) using generalized additive models to classify cyanobacterial bloom formation. We then connected changes in water source with shifts in chemistry and the occurrence of cyanobacterial blooms using principal components analysis. Phycocyanin was greater in years with managed reservoir inflow from a mesotrophic upstream reservoir (2016-2020), but dissolved organic matter (DOM) and specific conductivity, important determinants of drinking water quality, were greatest in years when landscape runoff dominated lake water source (2014-2015). Most notably, despite changing rapidly, it took multiple years for lake water to return to a consistent and reduced level of DOM after managed inflows from the upstream reservoir were resumed, an observation that underscores how resilience may be hindered by weak resistance to change and slow recovery. Environmental flows for water quality are rarely defined, yet we show that trade-offs exist between poor water quality via elevated conductivity and DOM and higher bloom risk, depending on water source. Our work highlights the importance of source water quality, not just quantity, to water security, and our findings have important implications for water managers who must protect ecosystem services while adapting to projected hydroclimatic change.
英文关键词	cyanobacterial blooms dissolved organic matter environmental flows flow management resilience water quality
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000952840300001
WOS关键词	CYANOBACTERIA ; MOLYBDENUM ; PHYTOPLANKTON ; RAINFALL ; SULFATE ; CLIMATE ; CANADA
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396031
推荐引用方式 GB/T 7714	Painter, Kristin J.,Venkiteswaran, Jason J.,Baulch, Helen M.. Blooms and flows: Effects of variable hydrology and management on reservoir water quality[J],2023,14(3).
APA	Painter, Kristin J.,Venkiteswaran, Jason J.,&Baulch, Helen M..(2023).Blooms and flows: Effects of variable hydrology and management on reservoir water quality.ECOSPHERE,14(3).
MLA	Painter, Kristin J.,et al."Blooms and flows: Effects of variable hydrology and management on reservoir water quality".ECOSPHERE 14.3(2023).