![Sample our Environment & Agriculture journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5934/TOC-Subject-Sample-2021-Environment-Agriculture.jpg"})
Abstract
The growth rate of the freshwater planktonic diatom Aulacoseira subarctica (O. Müll.) Haworth was significantly depressed when the dark period in a 6:18 light: dark cycle was interrupted by a one hour light break. The degree of depression was sensitive to the length and timing of the light break. A one hour light break was most effective in the middle of the dark period.