Date of Award:


Document Type:


Degree Name:

Master of Science (MS)


Wildland Resources


Gar E. Workman


Primary production was measured on a 9.5 acre Cache Valley, Utah farm pond from July 1971 to July 1972. Polyethylene film tubes, with lids, were used to confine columns of water for determining dissolved oxygen concentration. Once a week, dissolved oxygen samples were taken at sunset, the following sunrise and sunset. Annual primary production was estimated at 1289 grams oxygen per square meter for two of the four stations, and 927 grams oxygen per square meter for the remaining two stations. The weekly data was computed at once a month intervals to see if it would be possible to get a good estimate of primary production sampling only 12 times a year~ It was found that the stations with consistent limiting factors could have been sampled once a month with good results, but stations with fluctuating limiting factors could not be sampled that way for good results.