加古川(兵庫県)の水生植物

概要

論文の詳細を見る
Aquatic macrophytes were surveyed at 23 stations from the head stream through to the rivermouth of the Kako River, Hyogo Prefecture, southwestern Japan. A total of 36 species were recorded, including the submerged form of 4 wetland species. Based on the floristic composition and riverbed morphology the watercourse was divided into four zones as follows : I. An uppermost zone, where only aquatic moss occurred. II. An upper zone, characterized by the occurrence of Ranunculus nipponicus var. submersus and the submerged forms of a few wetland species. III. A middle zone, where Potamogeton crispus, Hydrilla verticillata, Egeria densa and P. malaianus (in the lower part only) were dominant species, abundance varying from site to site. IV. A lower zone, lacking macrophyte species except Phargmites australis due to tidal influence. Most of the reaches of the Kako River (St. 3 to 21) belonged to the middle zone.
日本生態学会の論文
1990-12-31