Enhancement of sediment phosphorus release during a tunnel construction across an urban lake (Lake Donghu, China)

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	Enhancement of sediment phosphorus release during a tunnel construction across an urban lake (Lake Donghu, China)
	Wang, Siyang 1,2; Li, Hui 3; Xiao, Jian 1,2; Zhou, Yiyong 1; Song, Chunlei 1; Bi, Yonghong 1; Cao, Xiuyun 1
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2016-09-01
卷号	23 期号:17 页码:17774-17783
关键词	Tunnel construction Alkaline phosphatase Dehydrogenase Extracellular enzymes Iron-bound phosphorus Lake eutrophication
ISSN号	0944-1344
英文摘要	Tunnel construction in watershed area of urban lakes would accelerate eutrophication by inputting nutrients into them, while mechanisms underlying the internal phosphorus cycling as affected by construction events are scarcely studied. Focusing on two main pathways of phosphorus releasing from sediment (enzymatic mineralization and anaerobic desorption), spatial and temporal variations in phosphorus fractionation, and activities of extracellular enzymes (alkaline phosphatase, beta-1,4-glucosidase, leucine aminopeptidase, dehydrogenase, lipase) in sediment were examined, together with relevant parameters in interstitial and surface waters in a Chinese urban lake (Lake Donghu) where a subaqueous tunnel was constructed across it from October 2013 to July 2014. Higher alkaline phosphatase activity (APA) indicated phosphorus deficiency for phytoplankton, as illustrated by a significantly negative relationship between APA and concentration of dissolved total phosphorus (DTP). Noticeably, in the construction area, APAs in both sediment and surface water were significantly lower than those in other relevant basins, suggesting a phosphorus supply from some sources in this area. In parallel, its sediment gave the significantly lower iron-bound phosphorus (Fe(OOH)similar to P) content, coupled with significantly higher ratio of iron (II) to total iron content (Fe2+/TFe) and dehydrogenase activities (DHA). Contrastingly, difference in the activities of sediment hydrolases was not significant between the construction area and other basins studied. Thus, in the construction area, subsidy of bioavailable phosphorus from sediment to surface water was attributable to the anaerobic desorption of Fe(OOH)similar to P rather than enzymatic mineralization. Finally, there exisosphate, and thereby facilitating phytoplankton growth in water column.ted a significantly positive relationship between chlorophyll a concentration in surface water and Fe(OOH)similar to P content in sediment. In short, construction activities within lakes may interrupt cycling patterns of phosphorus across sediment-water interface by enhancing release of redox-sensitive ph
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	ALKALINE-PHOSPHATASE ACTIVITY ; WATER-QUALITY ; DEHYDROGENASE-ACTIVITY ; SHALLOW LAKE ; RESERVOIR ; DYNAMICS ; RIVER ; SOIL ; EUTROPHICATION ; MANAGEMENT
收录类别	SCI
语种	英语
WOS记录号	WOS:000382674800081
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/28338]
专题	水生生物研究所_藻类生物学及应用研究中心_学位论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, 7 Donghu South Rd, Wuhan 430072, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 3.Tongren Univ, Coll Biol & A&F Engn, Tongren 554300, Guizhou, Peoples R China
推荐引用方式 GB/T 7714	Wang, Siyang,Li, Hui,Xiao, Jian,et al. Enhancement of sediment phosphorus release during a tunnel construction across an urban lake (Lake Donghu, China)[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2016,23(17):17774-17783.
APA	Wang, Siyang.,Li, Hui.,Xiao, Jian.,Zhou, Yiyong.,Song, Chunlei.,...&Cao, Xiuyun.(2016).Enhancement of sediment phosphorus release during a tunnel construction across an urban lake (Lake Donghu, China).ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,23(17),17774-17783.
MLA	Wang, Siyang,et al."Enhancement of sediment phosphorus release during a tunnel construction across an urban lake (Lake Donghu, China)".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 23.17(2016):17774-17783.