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The article reports on the pigment content and carbon to nitrogen ratios of freshwater red algae growing at different light levels. Rhodophyta growing in streams are frequently subjected to shading by riparian vegetation which results in significant seasonal variations in light quantity and quality. It has been suggested that there is a relationship between this photoregime and the predominance of phycocyanin in freshwater red algae. However, there is little evidence to support this suggestion. Pigment content and phycobiliprotein to chlorophyll a ratios can also change in response to variations in nitrogen metabolism.

Studies the distribution and systematics of the freshwater genus Tuomeya fluviatilis. Gametophyte development from a basal mass of undifferentiated cells rather than a chantrasia stage; No morphometric, environmental or geographic basis for separation of the groupings found.