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学科主题: Environmental Sciences
题名: BIOTURBATION OF TWO CHIRONOMID SPECIES ON NUTRIENT EXCHANGE AT SEDIMENT-WATER INTERFACE IN A CHINESE SHALLOW EUTROPHIC LAKE
作者: Jiang, Ping-Hong1, 2; Ji, Lei1, 2; Xiao, Wen-Juan1, 2; Huang, Dai-Zhong1, 2; Liu, Yun-Bing1, 2; Song, Chun-Lei1; Cao, Xiu-Yun1; Zhou, Yi-Yong1
通讯作者: Zhou, YY, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, 7 Donghu S Rd, Wuhan 430072, Hubei Province, Peoples R China
关键词: bioturbation ; chironomids ; sedimentary oxygen demand (SOD) ; nutrient exchanges ; shallow lake ; eutrophication
刊名: FRESENIUS ENVIRONMENTAL BULLETIN
发表日期: 2010
卷: 19, 期:5A, 页:902-910
收录类别: SCI
文章类型: Article
部门归属: [Jiang, Ping-Hong; Ji, Lei; Xiao, Wen-Juan; Huang, Dai-Zhong; Liu, Yun-Bing; Song, Chun-Lei; Cao, Xiu-Yun; Zhou, Yi-Yong] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei Province, Peoples R China; [Jiang, Ping-Hong; Ji, Lei; Xiao, Wen-Juan; Huang, Dai-Zhong; Liu, Yun-Bing] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Natural Science Foundation of China [40730528]; state major project of water pollution control and management [2009ZX07106-001]; National Basic Research Program of China [2008 CB418005]; State Key Laboratory of Freshwater Ecology and Biotechnology [Y05B101F01]
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
摘要: Bioturbation caused by chironomids has a great impact on sediment environment and nutrient cycling, which is of ecological significance in eutrophic lakes. Greatly differing in feeding and burrowing activities, the chironomid species may play distinct roles in driving nutrient cycling, Bioturbation effects of chiromomids were studied in Lake Donghu where Chironomus plumosus and Tanypus chinensis were detected to be the dominant species. The sediment phosphorus was also fractionated. The patterns of nutrient fluxes across the sediment-water interface bioturbated by these 2 species were studied using laboratory experiments. The burrowing activities of T. chinensis larvae in the surface sediment had little effect on the sedimentary oxygen demand (SOD) (28.9+/-1.5 mmol . m(-2) . d(-1)), consequently, with relatively limited inorganic-N release (94.6+/-6.0 mg . m(-2)) from sediment mainly in the form of NO3- (accounting for 82%) (p>0.05). Their excretion appears to be the major source contributing to the increase of P-release (15.58+/-0.22 mg . m(-2), 1.4 times higher than control, p<0.05). Ch. plumosus brought about a significantly higher SOD (55.7+/-4.6 mmol . m(-2) d(-1)) together with pulse of NH4+ (20.86+/-0.82 mg . m(-2). d(-1)) and SRP (3.66+/-0.12 mg . m(-2) . d(-1)) release from sediment in the early incubation time (p<0.05). Later, the release of NH4+ significantly decreased from 140.05+/-3.71 to 79.72+/-12.66 mg . m(-2), while NO3--release markedly increased from 33.31+/-6.22 to 64.58+/-5.99 mg . m(-2) (p<0.05). Conversions of inorganic N species stimulated by bioturbation were the dominant processes in controlling the inorganic-N fluxes. Noticeably, the linear decrease of SRP from 18.85+/-1.85 to 8.70+/-0.15 mg . m(-2) suggested the dominant role of oxygen bio-irrigation in P-cycling. Especially, it is ecologically important in shallow eutrophic lakes like Lake Donghu where sediment P is dominated by iron-bound P. Moreover, these two species of chironomid larvae induced noticeable particulate nutrient release from sediment, in addition to fluxes of dissolved ones. Briefly, these 2 species of chironomids exerted distinct impacts on the sedimentary metabolism in terms of SOD and nutrient flux rates by their own ways.
英文摘要: Bioturbation caused by chironomids has a great impact on sediment environment and nutrient cycling, which is of ecological significance in eutrophic lakes. Greatly differing in feeding and burrowing activities, the chironomid species may play distinct roles in driving nutrient cycling, Bioturbation effects of chiromomids were studied in Lake Donghu where Chironomus plumosus and Tanypus chinensis were detected to be the dominant species. The sediment phosphorus was also fractionated. The patterns of nutrient fluxes across the sediment-water interface bioturbated by these 2 species were studied using laboratory experiments. The burrowing activities of T. chinensis larvae in the surface sediment had little effect on the sedimentary oxygen demand (SOD) (28.9+/-1.5 mmol . m(-2) . d(-1)), consequently, with relatively limited inorganic-N release (94.6+/-6.0 mg . m(-2)) from sediment mainly in the form of NO(3)(-) (accounting for 82%) (p>0.05). Their excretion appears to be the major source contributing to the increase of P-release (15.58+/-0.22 mg . m(-2), 1.4 times higher than control, p<0.05). Ch. plumosus brought about a significantly higher SOD (55.7+/-4.6 mmol . m(-2) d(-1)) together with pulse of NH(4)(+) (20.86+/-0.82 mg . m(-2). d(-1)) and SRP (3.66+/-0.12 mg . m(-2) . d(-1)) release from sediment in the early incubation time (p<0.05). Later, the release of NH(4)(+) significantly decreased from 140.05+/-3.71 to 79.72+/-12.66 mg . m(-2), while NO(3)(-)-release markedly increased from 33.31+/-6.22 to 64.58+/-5.99 mg . m(-2) (p<0.05). Conversions of inorganic N species stimulated by bioturbation were the dominant processes in controlling the inorganic-N fluxes. Noticeably, the linear decrease of SRP from 18.85+/-1.85 to 8.70+/-0.15 mg . m(-2) suggested the dominant role of oxygen bio-irrigation in P-cycling. Especially, it is ecologically important in shallow eutrophic lakes like Lake Donghu where sediment P is dominated by iron-bound P. Moreover, these two species of chironomid larvae induced noticeable particulate nutrient release from sediment, in addition to fluxes of dissolved ones. Briefly, these 2 species of chironomids exerted distinct impacts on the sedimentary metabolism in terms of SOD and nutrient flux rates by their own ways.
关键词[WOS]: PLUMOSUS LARVAE ; ORGANIC-MATTER ; PEROXODISULFATE OXIDATION ; MARINE-SEDIMENTS ; PHOSPHORUS FLUX ; TOTAL NITROGEN ; OXYGEN-UPTAKE ; FRESH-WATER ; DENITRIFICATION ; RATES
语种: 英语
WOS记录号: WOS:000279092700001
ISSN号: 1018-4619
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/13695
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei Province, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Jiang, Ping-Hong; Ji, Lei; Xiao, Wen-Juan; Huang, Dai-Zhong; Liu, Yun-Bing; Song, Chun-Lei; Cao, Xiu-Yun; Zhou, Yi-Yong.BIOTURBATION OF TWO CHIRONOMID SPECIES ON NUTRIENT EXCHANGE AT SEDIMENT-WATER INTERFACE IN A CHINESE SHALLOW EUTROPHIC LAKE,FRESENIUS ENVIRONMENTAL BULLETIN,2010,19(5A):902-910
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