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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, LY (reprint author), Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Donghu South Rd 7, Wuhan 430072, Peoples R China.
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: [Wang, Heyun ; Ni, Leyi ; Xie, Ping] Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Wuhan 430072, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: China Postdoctoral Science Foundation [20090451088]; National Natural Science Foundation of China [31000161]
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 12:12 h) 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 mesa-eutrophic water bodies. (C) 2013 Elsevier Ltd. All rights reserved.
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
项目资助者: China Postdoctoral Science Foundation(20090451088) ; National Natural Science Foundation of China(31000161)
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/342005/19546
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

Recommended Citation:
Wang, Heyun; Ni, Leyi; Xie, Ping.The mitigating effect of calcification-dependent of utilization of inorganic carbon of Chara vulgaris Linn on NH4-N toxicity,CHEMOSPHERE,2013,93(2):373-379
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