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Tomson, M., Vignona, L., Chen, W., Liu, W., Kan, A., S&sw, H., Quast, C. L., Fisher, M. G., & Broughton, A. (1999). Target Clean-Up Levels and Remediation, Site Characterization/Risk Assessment of Tetrachloroethene (PCE)—Contaminated Site. Conference on Hazardous Waste Research, 1, 5-22.

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• TITLE: Macroinvertebrate Community Index (MCI) and Quantitative Macroinvertebrate Community Index (QMCI) Analysis: A Comparative Study between Le Afe and Mulivaifagatoloa Rivers, Upolu Island, Samoa

  AUTHORS: S. Taupega-Satau, P. Amosa, A. Leauga, J. Nunufolau, T. Veni Nun Yan

  KEYWORDS: Macroinvertebrates, Macroinvertebrate Community Index (MCI), Quantitative Macroinvertebrate Community Index (QMCI), Water Quality

  JOURNAL NAME: Journal of Geoscience and Environment Protection, Vol.12 No.8, August 19, 2024

  ABSTRACT: The diversity of Samoa’s freshwater macroinvertebrates remains largely unexplored, with past studies focusing on specific species without comprehensive cataloguing. This research evaluated the health of Upolu Island’s rural rivers through macroinvertebrate analysis, particularly in the Le Afe and Mulivaifagatoloa Rivers. Collaborating with Samoa’s Water Resources Division in the Ministry of Natural Resources and Environment (MNRE), three sites along each river were sampled, representing a gradient from pristine to anthropogenically impacted areas. A total of 2953 macroinvertebrates were collected and classified into five categories using established identification keys. The Macroinvertebrate Community Index (MCI) and Quantitative Macroinvertebrate Community Index (QMCI) were applied for analysis. The results showed no clear pattern of pollutant-sensitive species prevalence or decline in less disturbed rivers. High MCI scores with low QMCI values indicated numerous low-scoring species, while the opposite suggested a richness of high-scoring taxa. Although MCI and QMCI are tools for monitoring freshwater health, this study lays the groundwork for future research to categorize Samoan macroinvertebrates and assign tolerance scores based on their presence in varying river conditions.