Abstract
Measurements of total, chemical and biological oxygen consumption were made at 5 stations situated between 22 and 35 m in Lindaspollene, Norway. The results from each station did not reveal any clear seasonal variation, but the pooled data showed highest values in September, and lowest in January. Problems concerning interpretion of results of biological and chemical O2 consumption obtained by a poisoning technique (using formaldehyde) are discussed. The time-weighted mean of the annual total O2 consumption based on all stations was 10.67 ml m-2 h-1 or 92.2 l m-2 year-1. This corresponds to a consumption of 34.5g C m-2 year-1 (respiratory quotient=0.7), or 34 to 37% of the net annual primary production of phytoplankton.
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