Temporal and spatial variations in kinetics of alkaline phosphatase in sediments of a shallow Chinese eutrophic lake (Lake Donghu)
文献类型：期刊论文
| 作者 | Zhou, YY; Li, JQ; Zhang, M |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2002-04-01 |
| 卷号 | 36期号:8页码:2084-2090 |
| 关键词 | kinetics of alkaline phosphatase phosphatase in sediment seasonal variation P recycling in lake |
| ISSN号 | 0043-1354 |
| 通讯作者 | Zhou, YY, Chinese Acad Sci, Inst Hydrobiol, Lake Donghu Ecosyst Expt Stn, Wuhan 430072, Peoples R China |
| 中文摘要 | Monthly sediment and interstitial water samples were collected in a shallow Chinese freshwater lake (Lake Donghu) from three areas to determine if alkaline phosphatase activity (APA) plays an important role in phosphorus cycling in sediment. The seasonal variability in the kinetics of APA and other relevant parameters were investigated from 1995-1996. The phosphatase hydrolyzable phosphorus (PHP) fluctuated seasonally in interstitial water, peaking in the spring. A synchronous pattern was observed in chlorophyll a contents in surface water in general. The orthophosphate (o-P) concentrations in the interstitial water increased during the spring. An expected negative relationship between PHP and V-max of APA is not evident in interstitial water. The most striking feature of the two variables is their co-occurring, which can be explained in terms of an induction mechanism. It is argued that phosphatase activity mainly contributes to the driving force of o-P regeneration from PHP in interstitial water, supporting the development of phytoplankton biomass in spring. The V-max values in sediment increased during the summer, in Conjunction with lower K-m values in interstitial water that suggest a higher affinity for the substrate. The accumulation of organic matter in the sediment could be traced back to the breakdown of the algal spring bloom, which may stimulate APA with higher kinetic efficiency, by a combination of the higher V-max in sediments plus lower K-m values in interstitial water, in Summer. In summary, a focus On phosphatase and its substrate in annual scale may provide a useful framework for the development of novel P cycling, possible explanations for the absence of a clear relationship between PHP and APA were PHP released from the sediment which induced APA, and the presence of kinetically higher APA both in sediment and interstitial water which permitted summer mineralization of organic matter derived from the spring bloom to occur. The study highlighted the need for distinguishing functionally distinct extracellular enzymes between the sediment and interstitial water of lakes. (C) 2002 Elsevier Science Ltd. All rights reserved. |
| 英文摘要 | Monthly sediment and interstitial water samples were collected in a shallow Chinese freshwater lake (Lake Donghu) from three areas to determine if alkaline phosphatase activity (APA) plays an important role in phosphorus cycling in sediment. The seasonal variability in the kinetics of APA and other relevant parameters were investigated from 1995-1996. The phosphatase hydrolyzable phosphorus (PHP) fluctuated seasonally in interstitial water, peaking in the spring. A synchronous pattern was observed in chlorophyll a contents in surface water in general. The orthophosphate (o-P) concentrations in the interstitial water increased during the spring. An expected negative relationship between PHP and V(max) of APA is not evident in interstitial water. The most striking feature of the two variables is their co-occurring, which can be explained in terms of an induction mechanism. It is argued that phosphatase activity mainly contributes to the driving force of o-P regeneration from PHP in interstitial water, supporting the development of phytoplankton biomass in spring. The V(max) values in sediment increased during the summer, in Conjunction with lower K(m) values in interstitial water that suggest a higher affinity for the substrate. The accumulation of organic matter in the sediment could be traced back to the breakdown of the algal spring bloom, which may stimulate APA with higher kinetic efficiency, by a combination of the higher V(max) in sediments plus lower K(m) values in interstitial water, in Summer. In summary, a focus On phosphatase and its substrate in annual scale may provide a useful framework for the development of novel P cycling, possible explanations for the absence of a clear relationship between PHP and APA were PHP released from the sediment which induced APA, and the presence of kinetically higher APA both in sediment and interstitial water which permitted summer mineralization of organic matter derived from the spring bloom to occur. The study highlighted the need for distinguishing functionally distinct extracellular enzymes between the sediment and interstitial water of lakes. (C) 2002 Elsevier Science Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| 学科主题 | Engineering ; Environmental; Environmental Sciences; Water Resources |
| 类目[WOS] | Engineering, Environmental ; Environmental Sciences ; Water Resources |
| 研究领域[WOS] | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 关键词[WOS] | PHOSPHORUS AVAILABILITY ; ENZYME-ACTIVITY ; PORTO-NOVO ; MARINE-SEDIMENTS ; WATER ; BREITENBACH ; KINNERET ; ESTUARY ; SURFACE ; STREAM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000175807700018 |
| 公开日期 | 2010-10-13 |
| 源URL | [http://ir.ihb.ac.cn/handle/152342/9856]  |
| 专题 | 水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文 |
| 作者单位 | Chinese Acad Sci, Inst Hydrobiol, Lake Donghu Ecosyst Expt Stn, Wuhan 430072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, YY,Li, JQ,Zhang, M. Temporal and spatial variations in kinetics of alkaline phosphatase in sediments of a shallow Chinese eutrophic lake (Lake Donghu)[J]. WATER RESEARCH,2002,36(8):2084-2090. |
| APA | Zhou, YY,Li, JQ,&Zhang, M.(2002).Temporal and spatial variations in kinetics of alkaline phosphatase in sediments of a shallow Chinese eutrophic lake (Lake Donghu).WATER RESEARCH,36(8),2084-2090. |
| MLA | Zhou, YY,et al."Temporal and spatial variations in kinetics of alkaline phosphatase in sediments of a shallow Chinese eutrophic lake (Lake Donghu)".WATER RESEARCH 36.8(2002):2084-2090. |
入库方式： OAI收割
来源：水生生物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。