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Pham Anh Duc, Le Phat Quoi, Le Phi Nga (2011). Study on the Water Quality Assessment Using Benthic Macorinvertebrates for the Lower Dongnai River Biomonitoring, Thai Society of Higher Education Institutes on Environment (ISSN: 978-974-11-1446-7), pp1026-1041.

Pham Anh Duc1, Le Phat Quoi2, Le Phi Nga3
Faculty of Environment and Labor Safety, Ton Duc Thang University1,
Institute for Environment and Resources – HCMC National University2
Faculty of Biology, University of Natural Sciences – HCMC National University3,
Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it. (Pham Anh Duc)

Abstract
Based on the ecological monitoring methods using benthic macroinvertebrates these have been studied in the world and Vietnam as well, the ecological health monitoring of natural conditions in local rivers was choose and improved. From these studies, the water quality assessment using benthic macroinvertebrates for the Lower Dongnai River System was found.
In 2007 – 2009, the survey sampled 36 sites (432 events) of the Lower Dongnai River and tributaries selected. The characteristics for the communities of benthos macroinvertebrates were described. Both univariate and multivariate analyses were used to examine the spatial patterns of water quality and biological groups, and to relate these patterns to natural and human-influenced environmental variables and impact scores. The quantitative and qualitative pollution tolerance scores (TS) for the species and the sites (Average tolerance score per taxa/individual – ATSPT/ATSPI) of benthic macroinvertebrates in the Lower Dongnai River and tributaries were developed. Moreover, in the fisrt time, the ranking of common bio-indices using benthic macroinvertebrates for Lower Dongnai River system were built.
The results demonstrated that these organisms could be applied to describe the ecological health in the Lower Dongnai River and its tributaries base on the bio-indices established.

Keywords
: Benthic macroinvertebrates, Ecological health monitoring, Pollution tolerance score (TS), Average tolerance score per taxa/individual (ATSPT/ATSPI).