文摘
Photosynthesis-irradiance (PI) parameters of ice algae measured using oxygen optodes in this study were not significantly different between thin (<10 cm) and thick (15–25 cm) snow covers. Light drives seasonal increases in maximum photosynthetic rate (in the absence of photoinhibition), the photoacclimation parameter and POC:chl a composition. Significant nutrient limitation in the study area of Dease Strait, Nunavut, limited algal production and caused high POC:PON ratios. Algal biomass and photophysiology were limited by both light and nutrients over a diel period.