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题名: The mitigating effect of calcification-dependent of utilization of inorganic carbon of Chara vulgaris Linn on NH4-N toxicity
作者: Wang, Heyun1; Ni, Leyi1; Xie, Ping1
通讯作者: Ni, L.(nily@ihb.ac.cn)
关键词: Calcification ; Dissolve inorganic carbon utilization ; Ammonium ; Meso-eutrophic water
刊名: CHEMOSPHERE
发表日期: 2013-09-01
DOI: 10.1016/j.chemosphere.2013.04.100
卷: 93, 期:2, 页:373-379
收录类别: SCI
文章类型: Article
部门归属: (1) Donghu Experimental Station of Lake Ecosystems, State Key Laboratory for Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, The Chinese Academy of Sciences, Donghu South Road 7, Wuhan 430072, China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
摘要: Increased ammonium (NH4-N) concentrations in water bodies have been reported to adversely affect the dominant species of submersed vegetation in meso-eutrophic waters worldwide. However calcareous plants were lowly sensitive to NH4-N toxicity.In order to make clear the function of calcification in the tolerance of calcareous plants to NH4-N stress, we studied the effects of increased HCO3- and additional NH4-N on calcification and utilization of dissolve inorganic carbon (DIC) in Chara vulgaris Linn in a 7-d sub-acute experiment (light:dark 12:12h) carried out in an open experimental system in lab. Results revealed that calcification was dependent of utilization of dissolve inorganic carbon. Additional HCO3- significantly decreased the increase of pH while additional NH4-N did not. And additional HCO3- significantly improved calcification while NH4-N did in versus in relation to the variation of DIC concentration. However, addition of both HCO3- and NH4-N increased utilization of DIC. This resulted in calcification to utilization of DIC ratio decreased under additional NH4-N condition while increased under additional HCO3- conditions in response to the variation of solution pH.In the present study, external HCO3- decreased the increase of solution pH by increasing calcification, which correspondingly mitigated the toxic effect of high NH4-N. And we argue that the mitigating effect of increased HCO3- on NH4-N toxicity is dependent of plant calcification, and it is a positive feedback mechanism, potentially leading to the dominance of calcareous plants in meso-eutrophic water bodies. © 2013 Elsevier Ltd.
英文摘要: Increased ammonium (NH4-N) concentrations in water bodies have been reported to adversely affect the dominant species of submersed vegetation in meso-eutrophic waters worldwide. However calcareous plants were lowly sensitive to NH4-N toxicity.
关键词[WOS]: MACROPHYTE VALLISNERIA NATANS ; EELGRASS ZOSTERA-MARINA ; LAKE LUKNAJNO POLAND ; SUBMERSED MACROPHYTE ; POTAMOGETON-CRISPUS ; LIGHT AVAILABILITY ; GENERATES PROTONS ; SHALLOW LAKES ; AMMONIUM ; PHOSPHORUS
语种: 英语
WOS记录号: WOS:000324667700023
ISSN号: 0045-6535
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/19943
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Wuhan 430072, Peoples R China
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