diurnal curve method A technique for measuring oxygen production in aquatic ecosystems as a means of assessing gross primary or community productivity. Dissolved oxygen measurements are taken throughout a 24-hour period so that oxygen production by day and use at night by the aquatic community can be assessed.

diurnal curve method A technique for measuring oxygen production in aquatic ecosystems as a means of assessing gross primary or community productivity. Dissolved oxygen measurements are taken throughout a 24-hour period so that oxygen production by day and use at night by the aquatic community can be assessed.