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The study was described in the spatial patterns of animals for four stations at the Sosa River in
Korea during four seasons. Although this area was not wide, but the animal communities were very
diverse with 54 taxa, representing four kingdoms. Invertebrate animals exhibited the greatest species
diversity with 21 taxa identified, followed by birds (Aves, 14 taxa); reptiles/amphibians
(Sauropsida/Amphibia) with ten taxa, and fishes represented by nine taxa. BOD for all the samples
was found to above 4.0 ppm except the station A. So the depletion of DO is continuously occurring
due the discharge of agriculture water such as pesticides or by the contamination added by the city
civilization. The portion of COD, total suspended solids (SS), total nitrogen (N) and phosphate (P) in
the river increased exponentially along the upper-down gradient. Total nitrogen and phosphate were
also accumulated downward. Many cement blocks were creating instead river grasslands by the
Direct-stream Rivers Project. This artificial action reduced the water's natural filtration action and
eliminated the habitat of many animals. Thus there was decreased the number of species in this
river.
Keywords: Animal community, BOD, COD, Sosa River