The utilization of organic acids by planktonic heterotrophs in West Blue Lake, Manitoba

Simple item page
dc.contributor.authorHendzel, L. L.en_US
dc.date.accessioned2012-05-14T18:04:16Z
dc.date.available2012-05-14T18:04:16Z
dc.date.issued1972en_US
dc.degree.disciplineBotanyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractThe occurrence of several heterotrophic parameters are described with reference to the oligotrophic waters of West Blue Lake, Manitoba. The relationship between uptake velocities and concentration of nine organic acid substrates (lactic, pyruvic, fumaric, malic, acetic, succinic, glycolic, citric and formic acids) upon kinetic analysis produced values (Vmax, T, K + S and v values) which in most cases were of the same order of magnitude as reported in the literature for bacterial populations. Except for one substrate (formic acid) uptake velocities increased in the light and the dark with time, in most cases with lag in uptake velocity being present during 48 hr experiments. Such lags were felt to indicate periods of increase in bacterial populations within sample bottles. The relationship between uptake velocity and depth for three of the nine substrates (lactic, malic and succinic acids) produced responses which were believed to be associated with the temperature profile and nutrient availability of the water column. Evidence is given for the presence of different bacteria utilizing lactic and succinic acid than malic acid. Relative heterotrophic productivity as estimated for these three substrates was believed to be greater than primary productivity on a day to day basis. "In situ" experiments using NaH 14CO3 have shown that initial uptake rates were highest for 12 to 24 hr experiments and that subsequent decreases in uptake rates with time indicated re-assimilation of excreted products. It was felt that an equilibrium response between the organisms and the confines of the samples bottle in addition to a coupled oscillatory response were in operation controlling excretion and re-assimilation. Loss of activity during filtration of samples was investigated but no such response was measured.en_US
dc.format.extentv, 116 p.en_US
dc.identifierocm72776212en_US
dc.identifier.urihttp://hdl.handle.net/1993/5802
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.titleThe utilization of organic acids by planktonic heterotrophs in West Blue Lake, Manitobaen_US
dc.typemaster thesisen_US
local.subject.manitobayesen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Hendzel_The_utilization.pdf
Size:
6.47 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
FGS - Electronic Theses and Practica
Manitoba Heritage Theses