The algae of McKinney Marsh.

Abstract

A total of 58 species of algae were collected from McKinney Marsh during the study period. These made up 4 phyla, 12 orders, 23 families, and 42 genera. Of the 58 species found, 17 were reported new to the state. Annual precipitation patterns differed from those of the past five years. With rainfall 8 inches below normal by August, the Marsh dried and remained dry for the rest of the year. Selected Photochemical factors (pH, dissolved oxygen, and water temperature) were measured weekly. Of these pH is believe to be the most important in determining what groups of algae were present. Certain expected patterns of seasonal periodicity were observed. The Marsh was dominated by the Chlorophyta and Euglenophyta, and to a lesser extent by the Chrysophyta; the anticipated development of a large blue-green population in late summer was not found due to the drying of the Marsh.