Abstract
Alkaline phosphatase activity(APA) plays an important role in the biogeochemical cycling of phosphorus.The spatial-temporal distribution of APA and related environmental variables were studied in the Kuilei Lake.The research found significant seasonal and regional variations of APA in the water body,with lower APAs in outlet waters and higher in the estuarine.APAs were relatively low in winter(January),ranging from 2.06 to 17.33 nmol mL-1 h-1,and high in summer(July),ranging from 5.78 to 13.52 nmol mL-1 h-1.Correlation analyses indicated that APAs were significantly related to particulate organic nitrogen,total nitrogen and NO2--N.Other nitrogen forms(NO3--N and NH4+-N) were also related,though not significantly.The results implied that the factors related to nitrogen are the primary factors affecting APAs.
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