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Variations and possible source of potentially available phosphorus in a Chinese shallow eutrophic lake
Yiyong Zhou; Jianqiu Li; Chunlei Song; Xiuyun Cao; Zhou, YY, Chinese Acad Sci, Inst Hydrobiol, Lake Donghu Ecosyst Expt Stn, Wuhan 430072, Peoples R China
2004
Source PublicationJOURNAL OF FRESHWATER ECOLOGY
Volume19Issue:1Pages:87-96
AbstractSurface, 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.
KeywordAlkaline-phosphatase Activity Dissolved Organic Phosphorus Humic Materials Complex Phosphorus Marine Iron Fluctuation Mechanisms Sediments Release
DepartmentChinese Acad Sci, Inst Hydrobiol, Lake Donghu Ecosyst Expt Stn, Wuhan 430072, Peoples R China
Subject AreaEcology ; Limnology
Indexed BySCI
WOS IDWOS:000189324900012
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9542
Collection期刊论文
Corresponding AuthorZhou, YY, Chinese Acad Sci, Inst Hydrobiol, Lake Donghu Ecosyst Expt Stn, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Yiyong Zhou,Jianqiu Li,Chunlei Song,et al. Variations and possible source of potentially available phosphorus in a Chinese shallow eutrophic lake[J]. JOURNAL OF FRESHWATER ECOLOGY,2004,19(1):87-96.
APA Yiyong Zhou,Jianqiu Li,Chunlei Song,Xiuyun Cao,&Zhou, YY, Chinese Acad Sci, Inst Hydrobiol, Lake Donghu Ecosyst Expt Stn, Wuhan 430072, Peoples R China.(2004).Variations and possible source of potentially available phosphorus in a Chinese shallow eutrophic lake.JOURNAL OF FRESHWATER ECOLOGY,19(1),87-96.
MLA Yiyong Zhou,et al."Variations and possible source of potentially available phosphorus in a Chinese shallow eutrophic lake".JOURNAL OF FRESHWATER ECOLOGY 19.1(2004):87-96.
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