The mitigating effect of calcification-dependent of utilization of inorganic carbon of Chara vulgaris Linn on NH4-N toxicity

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	The mitigating effect of calcification-dependent of utilization of inorganic carbon of Chara vulgaris Linn on NH4-N toxicity
	Wang, Heyun; Ni, Leyi; Xie, Ping
刊名	CHEMOSPHERE
	2013-09-01
卷号	93 期号:2 页码:373-379
关键词	Calcification Dissolve inorganic carbon utilization Ammonium Meso-eutrophic water
ISSN号	0045-6535
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.
中文摘要	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. 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.
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]	MACROPHYTE VALLISNERIA NATANS ; EELGRASS ZOSTERA-MARINA ; LAKE LUKNAJNO POLAND ; SUBMERSED MACROPHYTE ; POTAMOGETON-CRISPUS ; LIGHT AVAILABILITY ; GENERATES PROTONS ; SHALLOW LAKES ; AMMONIUM ; PHOSPHORUS
收录类别	SCI
资助信息	China Postdoctoral Science Foundation [20090451088]; National Natural Science Foundation of China [31000161]
语种	英语
WOS记录号	WOS:000324667700023
公开日期	2014-01-03
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/19546]
专题	水生生物研究所_淡水生态学研究中心_期刊论文
作者单位	Chinese Acad Sci, Donghu Expt Stn Lake Ecosyst, State Key Lab Freshwater Ecol & Biotechnol China, Inst Hydrobiol, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	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[J]. CHEMOSPHERE,2013,93(2):373-379.
APA	Wang, Heyun,Ni, Leyi,&Xie, Ping.(2013).The mitigating effect of calcification-dependent of utilization of inorganic carbon of Chara vulgaris Linn on NH4-N toxicity.CHEMOSPHERE,93(2),373-379.
MLA	Wang, Heyun,et al."The mitigating effect of calcification-dependent of utilization of inorganic carbon of Chara vulgaris Linn on NH4-N toxicity".CHEMOSPHERE 93.2(2013):373-379.