Fluctuation of Alkaline Phosphatase Activity in Stream and Reservoir Water in Adjacent Watersheds

Autor:	Ayumi Nakagawa, Hiroshi Hirotani, Kazuki Ochi, Makoto Daijo
Rok vydání:	2001
Předmět:	Hydrology Phosphorus concentration Microorganism Phosphorus education chemistry.chemical_element STREAMS Summer season chemistry Reservoir water Environmental chemistry mental disorders Alkaline phosphatase psychological phenomena and processes
Zdroj:	Journal of Japan Society on Water Environment. 24:762-765
ISSN:	1881-3690 0916-8958
Popis:	Fluctuations of alkaline phosphatase activities in two streams and in reservoirs receiving the stream waters located in two adjacent but not connected watersheds were investigated from January to December in 2000. Alkaline phosphatase activities (APA) remained nearly constant in both streams, whereas in reservoirs they increased during the summer season. No relation was found between APA and soluble reactive phosphorus concentration. At one sampling station located in the stream, phosphorus concentration extraordinarily increased later in the study, but there were no related change observed in APA. An examination of size-fractionated samples suggested that most the APA in stream could be attributed to dissolved enzymes, whereas in reservoir most APA was related to bacterial particles. It assumed that APA is not indicative of phosphorus status of aquatic microorganisms.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c6dab03d65f865e21188d1d7c26c07fb https://doi.org/10.2965/jswe.24.762 Zobrazit plný text záznamu