中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Alkaline phosphatase activity and the phosphorus mineralization rate of Lake Taihu

文献类型:期刊论文

AuthorGao Guang; Zhu Guangwei; Qin Boqiang; Chen Jun; Wang Ke
SourceSCIENCE IN CHINA SERIES D-EARTH SCIENCES
Issued Date2006
Volume49Issue:suppPages:176-185
KeywordLake Taihu alkaline phosphatase kinetic parameters phosphorus mineralization rate
ISSN1006-9313
English AbstractThe phosphorus fractions, the alkaline phosphatase activity (APA) and other water chemical parameters were concomitantly monitored from April 2003 to October 2004 in different ecotype sites of Lake Taihu. During the stages of algae growth, the phosphorus fractions and their relationships with APA in different ecotype sites were discussed and the phosphorus mineralization rate was calculated. In the water of Lake Taihu, most of the phosphorus (70.2%) could be attributed to the suspended particulate phosphorus, while the dissolved reactive phosphorus (DRP) seems to contribute less than 7%. About 58% of the total phosphorus, however, can be hydrolyzed as inorganic phosphate to compensate for phosphorus deficiency of algae and bacteria growth. During the different algae growth stages, the APA and its Kinetic parameters were varied significantly between different ecotype sites of Lake Taihu. This trend is also visible by comparing the phosphorus mineralization rate, and the most rapidly phosphorus turnover time is only several minutes. The fast recycle of phosphorus can, to some extent, be explained that the phosphorus source of algal blooms. The phytoplankton seems to compensate for phosphorus deficiency by using the alkaline phosphatase to hydrolyze phosphomonoesters.
Available Date2012-03-08