| 引用本文: | 周易勇,李建秋,张敏,陈旭东,张玉敏.浅水湖泊中沉积物碱性磷酸酶动力学参数的分布.湖泊科学,2001,13(3):261-266. DOI:10.18307/20010310 |
| ZHOU Yiyong,LI Jianqiu,ZHANG Min,CHEN Xudong,ZHANG Yumin.Distribution of Kinetic Parameters of Alkaline Phosphatase in Sediments of Shallow Lakes. J. Lake Sci.2001,13(3):261-266. DOI:10.18307/20010310 |
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| 摘要: |
| 东湖沉积物磷酸酶在较高的pH范围内表现出较高活性,故为碱性磷酸酶.东湖与严西湖沉积物中碱性磷酸酶的动力学参数表现出明显的空间异质性,且与间隙水和表层水中正磷酸根浓度无明显的对应关系.此外,它们在垂直方向上亦极具变化,除在沉积物表面显示较高催化效率之外,较深层面(约距表面8-12cm)亦有类似峰值,这一结果补充说明了湖泊沉积物磷循环的另一活跃区域以及相应的生物化学机制. |
| 关键词: 沉积物 碱性磷酸酶 分布 浅水湖泊 |
| DOI：10.18307/20010310 |
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| 基金项目:国家自然科学基金(39670149、39170165);淡水生态与生物技术国家重点实验室基金;中国科学院东湖湖泊生态系统试验站基金;中国科学院长春地理研究所现代湿地过程与环境开放实验室基金;中国科学院"青年科学家小组"基金;农业部水产增养殖生理生态开放实 |
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| Distribution of Kinetic Parameters of Alkaline Phosphatase in Sediments of Shallow Lakes |
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ZHOU Yiyong, LI Jianqiu, ZHANG Min, CHEN Xudong, ZHANG Yumin
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Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P. R. China
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| Abstract: |
| Phosphatase in sediments in Lake Donghu, Wuhan can be classified as alkaline phosphatase, showing a higher activity at alkaline pH ranges.The kinetics of alkaline phosphatase exhibited a distinct spatial heterogeneity in sediments of Lake Donghu and Yanxihu, which is not significantly correlated with the concentrations of soluble reactive phosphorus in interstitial water, overlying water and surface water.Furthermore, it varied greatly in vertical profiles, and peaked both at surface and in a middle layer (8-12 cm beneath the surface).The latter added a new dimension in which P cycling mediated by some biochemical mechanisms is active. |
| Key words: Sediments alkaline phosphatase distribution shallow lakes |
