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学科主题: Ecology; Limnology
题名: Variations and possible source of potentially available phosphorus in a Chinese shallow eutrophic lake
作者: Zhou, YY; Li, JQ; Song, CL; Cao, XY
通讯作者: Zhou, YY, Chinese Acad Sci, Inst Hydrobiol, Lake Donghu Ecosyst Expt Stn, Wuhan 430072, Peoples R China
关键词: ALKALINE-PHOSPHATASE ACTIVITY ; DISSOLVED ORGANIC PHOSPHORUS ; HUMIC MATERIALS ; COMPLEX PHOSPHORUS ; MARINE ; IRON ; FLUCTUATION ; MECHANISMS ; SEDIMENTS ; RELEASE
刊名: JOURNAL OF FRESHWATER ECOLOGY
发表日期: 2004-03-01
卷: 19, 期:1, 页:87-96
收录类别: SCI
文章类型: Article
部门归属: Chinese Acad Sci, Inst Hydrobiol, Lake Donghu Ecosyst Expt Stn, Wuhan 430072, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Ecology ; Limnology
研究领域[WOS]: Environmental Sciences & Ecology ; Marine & Freshwater Biology
摘要: Surface, overlying, and interstitial waters were collected at monthly intervals at three experimental stations in a shallow Chinese eutrophic lake (Lake Donghu) to assess the occurrence, distribution, and status of UV-sensitive phosphorus compounds (UVSP) and phosphatase hydrolyzable phosphorus (PHP), coupled with kinetics of alkaline phosphatase activity (APA). Orthophosphate (o-P) concentrations were generally the highest at Station 1, where chlorophyll a (chl a) was a function of o-P at temporal scale. The V-max/K-m of APA obtained by Michaelis-Menten approach paralleled the chlorophyll data at two stations. These facts imply that the development of phytoplankton may be attributed to APA induced by PHP. The potentially available UVSP and PHP peaked in interstitial, overlying, and surface water simultaneously sometimes in 1995 to 1996 and 1997 to 1999. It is postulated that they may arise from the bottom. UVSP peaked in interstitial water at the 12-16 cm layers in sediment cores. Moreover, in interstitial water, UV irradiation resulted in an elevated o-P concentration and decreased APA in a timeseries analysis. Therefore, the mechanism that APA involved in the process of photorelease of o-P was not demonstrated. UVSP is most likely a functional group of labile phosphorus distinct from the enzymatic substrate in this shallow eutrophic lake.
英文摘要: Surface, overlying, and interstitial waters were collected at monthly intervals at three experimental stations in a shallow Chinese eutrophic lake (Lake Donghu) to assess the occurrence, distribution, and status of UV-sensitive phosphorus compounds (UVSP) and phosphatase hydrolyzable phosphorus (PHP), coupled with kinetics of alkaline phosphatase activity (APA). Orthophosphate (o-P) concentrations were generally the highest at Station 1, where chlorophyll a (chl a) was a function of o-P at temporal scale. The V-max/K-m of APA obtained by Michaelis-Menten approach paralleled the chlorophyll data at two stations. These facts imply that the development of phytoplankton may be attributed to APA induced by PHP. The potentially available UVSP and PHP peaked in interstitial, overlying, and surface water simultaneously sometimes in 1995 to 1996 and 1997 to 1999. It is postulated that they may arise from the bottom. UVSP peaked in interstitial water at the 12-16 cm layers in sediment cores. Moreover, in interstitial water, UV irradiation resulted in an elevated o-P concentration and decreased APA in a timeseries analysis. Therefore, the mechanism that APA involved in the process of photorelease of o-P was not demonstrated. UVSP is most likely a functional group of labile phosphorus distinct from the enzymatic substrate in this shallow eutrophic lake.
关键词[WOS]: ALKALINE-PHOSPHATASE ACTIVITY ; DISSOLVED ORGANIC PHOSPHORUS ; HUMIC MATERIALS ; COMPLEX PHOSPHORUS ; MARINE ; IRON ; FLUCTUATION ; MECHANISMS ; SEDIMENTS ; RELEASE
语种: 英语
WOS记录号: WOS:000189324900012
ISSN号: 0270-5060
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/9542
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Lake Donghu Ecosyst Expt Stn, Wuhan 430072, Peoples R China

Recommended Citation:
Yiyong Zhou; Jianqiu Li; Chunlei Song; Xiuyun Cao.Variations and possible source of potentially available phosphorus in a Chinese shallow eutrophic lake,JOURNAL OF FRESHWATER ECOLOGY,2004,19(1):87-96
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