Abstract
In the Sennan District of the southern part of Osaka Prefecture, there is a lot of freshwater ponds. The author has studied about one hundred ponds there. From seven ponds and one Sphagnum moor at Sunagawa and Kawai areas were collected 93 species of desmids in total, i. e., 8 species of Closterium, 3 species of Pleurotaenium, 4 species of Arthrodesmus, 39 species of Cosmarium, 18 species of Staurastrum, 4 species of Micrasterias, and so on. G-7 was a remarkable pond in which 50 species of desnn'ds were found.As for the chemical conditions of the waters, the value of pH indicated below 6.0 except J-10 pond and the amounts of KMnO4 cons., Ca and SO4 ions were of low values. Potamogeton, Brassenia, Nitella and Utricularia, which are also commonly found in these ponds, may have some influences on the desmid flora.
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Schedule a callMore From: Japanese Journal of Limnology (Rikusuigaku Zasshi)
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