Seasonal Changes of Photosynthetic and Respiratory Rates of Lithophyllum yesoense FOSLIE (Corallinaceae)

Abstract

Photosynthetic and respiratory rates of Lithophyllum yessoense Foslie, a dominant crustose coralline alga on barren ground along the southwestern coast of Hokkaido, was measured four times a year using the polarographic method.
Photosynthesis was found to increase with the logarithm of light intensity up to 100W/m² and was constant between 100 and 1, 000W/m². Both photosynthetic rate (net and total) and respiratory rate were the highest in August.