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KINETICS OF SIZE-FRACTIONATED AND DISSOLVED ALKALINE-PHOSPHATASE IN A FARM POND
ZHOU, YY; DODDS, WK; ZHOU, YY, KANSAS STATE UNIV,DIV BIOL,ACKERT HALL,MANHATTAN,KS 66502
1995
Source PublicationARCHIV FUR HYDROBIOLOGIE
Volume134Issue:1Pages:93-102
AbstractNutrient addition bioassays were conducted in 10 L carboys with water from a eutrophic farm pond. The four bioassay treatments each conducted in triplicate were control (no nutrients added), +N (160 mu mol L(-1) NH4Cl), +P (10 mu mol L(-1) KH2PO4), and N+P (160 mu mol L(-1) NH4Cl and 10 mu mol L(-1) KH2PO4). The size fractionated (0.2-0.8, 0.8-3, > 3 mu m) contents of the carboys were analyzed after 7 d for alkaline phosphatase activity (APA) and chlorophyll-a content. Chlorophyll data suggested P deficiency in ammonium and control mesocosms and no P deficiency with phosphate additions. Pond water also was collected in June, August, October, and March for measurement of APA. In water from the pond, the greatest V-max of APA usually was associated with microorganisms in the size classes between 0.8-3 mu m. In mesocosm experiments, the N+P treatment increased V-max of dissolved and particulate associated APA in the 0.2-0.8 mu m size range and in dissolved form. The V-max of APA in the largest size-fraction (> 3 mu m) increased markedly with P deficiency (+N treatment) and decreased in the P-enrichment treatment. The patterns of APA and chlorophyll associated with different size fractions often varied independently among different treatments and seasons and not always as a function of P deficiency, indicating the difficulty of attempting to normalize APA to phytoplankton biomass or chlorophyll. The Michaelis half saturation constant of APA in the pond water showed no strong trends with varied seasons or size fraction.
KeywordPhosphorus-compounds Oligotrophic Lake Phytoplankton Limitation Ammonium Nitrogen Waters
DepartmentCHINESE ACAD SCI,INST HYDROBIOL,WUHAN 430072,PEOPLES R CHINA
Subject AreaLimnology ; Marine & Freshwater Biology
Indexed BySCI
WOS IDWOS:A1995RJ33500005
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/10302
Collection期刊论文
Corresponding AuthorZHOU, YY, KANSAS STATE UNIV,DIV BIOL,ACKERT HALL,MANHATTAN,KS 66502
Recommended Citation
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ZHOU, YY,DODDS, WK,ZHOU, YY, KANSAS STATE UNIV,DIV BIOL,ACKERT HALL,MANHATTAN,KS 66502. KINETICS OF SIZE-FRACTIONATED AND DISSOLVED ALKALINE-PHOSPHATASE IN A FARM POND[J]. ARCHIV FUR HYDROBIOLOGIE,1995,134(1):93-102.
APA ZHOU, YY,DODDS, WK,&ZHOU, YY, KANSAS STATE UNIV,DIV BIOL,ACKERT HALL,MANHATTAN,KS 66502.(1995).KINETICS OF SIZE-FRACTIONATED AND DISSOLVED ALKALINE-PHOSPHATASE IN A FARM POND.ARCHIV FUR HYDROBIOLOGIE,134(1),93-102.
MLA ZHOU, YY,et al."KINETICS OF SIZE-FRACTIONATED AND DISSOLVED ALKALINE-PHOSPHATASE IN A FARM POND".ARCHIV FUR HYDROBIOLOGIE 134.1(1995):93-102.
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