Theses and Dissertations

Title: Studies on chlorophyll in pond waters

Name: Fortes, Romeo Di-o

Degree: MS

Chair: Dr. Claude E. Boyd

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1973

Pages: 62

Keywords: Chlorophyll,Ponds,Primary productivity,Particulate matter.


Samples of water were collected from the different ponds of the Fisheries Research Station, Auburn University, Auburn, Alabama, and subjected to measurements of chlorophyll, primary productivity, and particulate matter. Minimum values of 16.2 ug/l of chlorophyll and 4.5 mg/l of particulate matter were obtained. Maximum values of 815.6 ug/l and 119.0 mg/l were obtained for chlorophyll and particulate matter respectively.Significant positive relationships were obtained between concentrations of chlorophyll and primary production, and between chlorophyll and amount of particulate matter. The coefficients of correlation for chlorophyll and gross primary production was 0.80 (P< 0.01), and for chlorophyll and particulate matter, it was 0.89 (P < 0.01). The depth distribution of chlorophyll and primary production (both gross and net) were determined from 5 ponds. In general, it appears, that, a direct relationship between the concentrations of chlorophyll and primary productivity existed. It is obvious, however, that the rate of gross photosynthesis decreased with increasing depth but a rather uniform distribution of chlorophyll was observed. The different positions of the compensation points and some other variations were noted. The relationship between the concentrations of chlorophyll and the production of fathead minnows, Pimephales promelas, was determined in plastic pools (dia.=3.05 meters). Results were not highly significant (r=0.64, P<0.01). The measurement of chlorophyll did not provide a very good estimate of the amount of net primary productivity available to P. promelas.

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