气候变化领域集成服务门户(CCPortal): Biogeochemical causes of sixty-year trends and seasonal variations of river water properties in a large European basin

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DOI	10.1007/s10533-021-00800-z
	Biogeochemical causes of sixty-year trends and seasonal variations of river water properties in a large European basin
	Kopáček J.; Hejzlar J.; Porcal P.; Znachor P.
发表日期	2021
ISSN	1682563
起始页码	81
结束页码	98
卷号	154 期号:1
英文摘要	We evaluated long-term trends and seasonal variations in the major physical–chemical properties of the circum-neutral Slapy reservoir (Vltava, Czech Republic) from 1960 to 2019. Mean annual water temperature increased by 2.1 °C, flow maxima shifted by ~ 13 days from the early April to mid-March, and the onset of thermal stratification of water column and spring algal peaks advanced by 19 and 21 days, respectively, due to climate warming. Concentrations of major ions, phosphorus (P), and chlorophyll increased from the 1960s to the 1990–2000s, then decreased due to changing agricultural practices and legislation, intensified wastewater treatment, and decreasing atmospheric pollution. Concentrations of dissolved organic carbon (DOC) decreased from 1960 to the 1990s due to improved wastewater treatment, then began to increase in response to climate change and reduced acidic deposition. Concentrations of water constituents exhibited varying individual long-term and seasonal patterns due to the differing effects of following major processes on their production/removal in the catchment-river system: (1) applications of synthetic fertilizers, liming and farmland draining (NO3−, SO42−, Cl−, Ca2+, Mg2+, K+, and HCO3−), (2) wastewater production and treatment (DOC, P, N forms), (3) road de-icing (Cl− and Na+), (4) atmospheric pollution (SO42−), (5) climate change (DOC), and (6) the aging of reservoirs (NH4+). The water pH increased until the early 1990s, then decreased and exhibited pronounced seasonal variations, integrating the effects of changing external acidity sources and in-lake H+ sources and sinks (i.e., microbial CO2 production/consumption and availability and transformations of inorganic N), and changes in water buffering capacity. Anthropogenic and climatic effects, reservoir aging, and changes in water eutrophication thus may significantly affect water pH also in circum-neutral systems. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
英文关键词	Chlorophyll; Climate change; DOC; Nutrients; PH; Water pollution
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184601
作者单位	Biology Centre of the Czech Academy of Sciences, Institute of Hydrobiology, Na Sádkách 7, České Budějovice, 37005, Czech Republic; Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic
推荐引用方式 GB/T 7714	Kopáček J.,Hejzlar J.,Porcal P.,et al. Biogeochemical causes of sixty-year trends and seasonal variations of river water properties in a large European basin[J],2021,154(1).
APA	Kopáček J.,Hejzlar J.,Porcal P.,&Znachor P..(2021).Biogeochemical causes of sixty-year trends and seasonal variations of river water properties in a large European basin.Biogeochemistry,154(1).
MLA	Kopáček J.,et al."Biogeochemical causes of sixty-year trends and seasonal variations of river water properties in a large European basin".Biogeochemistry 154.1(2021).