RELEASE PATTERNS OF NITROGEN AND PHOSPHORUS FROM LAKE SEDIMENT AS AFFECTED BY ORGANIC MATTER AND CHIRONOMIDS LARVAE

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	RELEASE PATTERNS OF NITROGEN AND PHOSPHORUS FROM LAKE SEDIMENT AS AFFECTED BY ORGANIC MATTER AND CHIRONOMIDS LARVAE
	Huang Daizhong 1,2; Ji Lei 1,2; Zhou Chun 1,2; Song Chunlei 1; Cao Xiuyun 1; Zhou Yiyong 1
刊名	FRESENIUS ENVIRONMENTAL BULLETIN
	2011
卷号	20 期号:8 页码:1880-1887
关键词	lake sediment nitrogen phosphorus organic matter Chironomus plumosus larvae aeration
ISSN号	1018-4619
通讯作者	Zhou Yiyong，Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, 7 Donghu S Rd, Wuhan 430072, Hubei, Peoples R China ; zhouyy@ihb.ac.cn
中文摘要	Sediment of eutrophic lakes was characterized by higher organic matter (OM) content with chironomids being the common species. Hence, effects of these two factors and their interaction on sediment nutrient release are of great ecological significance. These effects under the underlying mechanisms were examined by laboratory experiments using the sediment in a Chinese shallow lake (Lake Tuanhu) in this study. The input of the OM (algal detritus) brought about significant increases in concentrations of total, particulate and soluble reactive phosphorus (SRP) and ammonia in overlying water within a similar time span. These releases were largely depressed by aeration, but greatly enhanced with an additional involvement of the larvae of Chironomus plumosus. Therefore, the OM and chironomids acted in concert to promote nutrient releases, and the onset of anaerobic conditions was a common mechanism. Additionally, there existed a significant relationship between the OM content and alkaline phosphatase activity (APA) in sediments suggesting the activated enzymatic hydrolysis to be another mechanism driving SRP release while APA remained unchanged with addition of chironomids. Noticeably, when the OM and chironomids larvae co-occurred, aeration provided the overlying water with the highest concentrations of SRP and ammonia, which was followed by nitrite and nitrate at the earlier incubation stage. Under the oxic conditions, the larvae may excrete more SRP and ammonia with the latter being gradually shifted along the pathway of nitrification. Thus, for the recovery of eutrophic lakes with the sediments enriched by OM and chironomids, aeration should be cautiously applied.
英文摘要	Sediment of eutrophic lakes was characterized by higher organic matter (OM) content with chironomids being the common species. Hence, effects of these two factors and their interaction on sediment nutrient release are of great ecological significance. These effects under the underlying mechanisms were examined by laboratory experiments using the sediment in a Chinese shallow lake (Lake Tuanhu) in this study. The input of the OM (algal detritus) brought about significant increases in concentrations of total, particulate and soluble reactive phosphorus (SRP) and ammonia in overlying water within a similar time span. These releases were largely depressed by aeration, but greatly enhanced with an additional involvement of the larvae of Chironomus plumosus. Therefore, the OM and chironomids acted in concert to promote nutrient releases, and the onset of anaerobic conditions was a common mechanism. Additionally, there existed a significant relationship between the OM content and alkaline phosphatase activity (APA) in sediments suggesting the activated enzymatic hydrolysis to be another mechanism driving SRP release while APA remained unchanged with addition of chironomids. Noticeably, when the OM and chironomids larvae co-occurred, aeration provided the overlying water with the highest concentrations of SRP and ammonia, which was followed by nitrite and nitrate at the earlier incubation stage. Under the oxic conditions, the larvae may excrete more SRP and ammonia with the latter being gradually shifted along the pathway of nitrification. Thus, for the recovery of eutrophic lakes with the sediments enriched by OM and chironomids, aeration should be cautiously applied.
学科主题	Environmental Sciences & Ecology
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]	SHALLOW EUTROPHIC LAKE ; ALKALINE-PHOSPHATASE ; PLUMOSUS LARVAE ; BENTHIC INVERTEBRATES ; PROFUNDAL SEDIMENTS ; WATER ; OXYGENATION ; EXCHANGE ; FLUXES ; ACCUMULATION
收录类别	SCI
资助信息	National Natural Science Foundation of China[40730528, 41073066]; Chinese Academy of Sciences[KZCX1-YW-14-1]; State Key Laboratory of Freshwater Ecology and Biotechnology[2009FBZ10]
语种	英语
WOS记录号	WOS:000294318900002
公开日期	2011-11-09
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/16345]
专题	水生生物研究所_水环境工程研究中心_期刊论文
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Huang Daizhong,Ji Lei,Zhou Chun,et al. RELEASE PATTERNS OF NITROGEN AND PHOSPHORUS FROM LAKE SEDIMENT AS AFFECTED BY ORGANIC MATTER AND CHIRONOMIDS LARVAE[J]. FRESENIUS ENVIRONMENTAL BULLETIN,2011,20(8):1880-1887.
APA	Huang Daizhong,Ji Lei,Zhou Chun,Song Chunlei,Cao Xiuyun,&Zhou Yiyong.(2011).RELEASE PATTERNS OF NITROGEN AND PHOSPHORUS FROM LAKE SEDIMENT AS AFFECTED BY ORGANIC MATTER AND CHIRONOMIDS LARVAE.FRESENIUS ENVIRONMENTAL BULLETIN,20(8),1880-1887.
MLA	Huang Daizhong,et al."RELEASE PATTERNS OF NITROGEN AND PHOSPHORUS FROM LAKE SEDIMENT AS AFFECTED BY ORGANIC MATTER AND CHIRONOMIDS LARVAE".FRESENIUS ENVIRONMENTAL BULLETIN 20.8(2011):1880-1887.