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Water quality assessment using macroinvertebrates and physico-chemical parameters in the riverine system of Iligan City, Philippines

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Author(s): Annielyn D. Tampus | Ermelinda G. Tobias | Ruben F. Amparado | Lydia Bajo | Astrid L. Sinco

Journal: Advances in Environmental Sciences
ISSN 2066-7620

Volume: 4;
Issue: 2;
Start page: 59;
Date: 2012;
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Keywords: Water quality | macroinvertebrates | physico-chemical parameters

ABSTRACT
The water quality in the riverine systems (Mandulog and Iligan) of Iligan City decreases as itapproaches the downstream. Canonical Correspondence Analysis (CCA) was used to determine whichphysico-chemical parameters would influence the assemblage of macroinvertebrates. Results revealedthat Total Suspended Solids (TSS) affect the groups Plecoptera, Tricoptera, Diptera and Simuliidae whilenitrate affects Plecoptera and Gomphidae. Principal Component Analysis (PCA) was used to determinewhich physico-chemical parameters describe the sampling sites. Out of the ten physico-chemicalparameters that were determined, only the pH, silicate and nitrate showed significant correlation thatdescribe the sampling sites. These results indicated that the sampling sites within the two rivers showsimilar chemical attributes.
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