Abstract
There is an increased interest in the Researchers, Government in the conservation of water resources in Central Amazonia region particularly in Ecuador. We collected water sample in two different sampling stations in the upstream and downstream of river Piatua. So far no work has been carried out on the water quality of river Piatua to understand the biodiversity of macroinvertebrates and use of the same in the water quality assessment. Our final index included the following metrics namely Biotic index, Ephemeroptera, -Plecoptera- Trichopters, (EPT) richness as richness measures, EPT and Chironomidae ratio, H’ ,evenness (Hmax) and BMWP ABI to understand the water quality . We have also studied the physic chemical characteristics of water and coliform bacteria to assess the quality of water .All the values obtained reflect the quality water in the sampling station 1 Piatua High Basin which is in the upstream is better than the station Piatua 2 CIPCA which is in down stream. In general, both the sampling stations show the slow deterioration in water quality and thus necessitated a need for mitigation measure to save the Piatua river. The various metric values are less than 0.05 (p value is >0.05).
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