AbstractsStudy the relationship of soil animals in a still water source ecosystem created by the humans in the area of the village of THA kwian. San Sai district, Chiang Mai province during the months of September to December 2559 studied a variety of insect larvae and benthic animals of water surface area. In this study, by sampling water points.12 point 3 experimental units. Point 3 is the area upstream and downstream by making sampling benthic animals, once a month is a long period of 4 months. The results showed that soil animals. Fish, shellfish and crabs at Pier village cart. San Sai district, Chiang Mai province consists of a group of soil animal phylum Mollusca include include all 2 and Arthropoda, which can distinguish the family of soil animals. 8, Wong is a benthic animals by a group the Group Mollusca which is the main structure found in all ponds in each pond has a variety of Wong sat.Most animal body is ground included three families, which is found to be benthic animals, leafy kinds is Ampullariidae (clams, cherry) and Viviparidae (periwinkle) Found a lot of still-water sources that are created in a pond the size of 3 acres, the analysis results to group and sort by points. Survey in conjunction with the month of survey and exploration in conjunction with point sampling areas, found that the areas where there is a 50 square meters with soil animals in doses Plecoptera sp. which indicates the point of such surveys indicate the water quality index as well.Key words: benthic animals, clams, relationships of benthic animals. THA kwian village area. San Sai district, Chiang Mai Province
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