Study of effects of environmental factors on biochemical compositions of four species of marine single-celled algae

摘要

Photosynthetic rates (PR) of four species of marine single-celled algae were determined by means of ~14C-tracer method under the experimental modelling conditions. The effects of environmental factors, such as light, temperature and nutrients, on the biochemical compositions of the algae were studied. The results indicate that the suitable light intensities for the growth of Phaeodactylum tricornutum, Dunaliella spp., Skeletonema costatum and Isochrysis galbana are in the range from 5.8×10~3 to 15× 10~3 lx, showing an increasing trend of photosynthetic rates with the heightened heightened light intensities. The ir- radiance response of Dunaliella spp. And Isochrysis galbana is significant.