Jahani, Aqilah Zakiah (2023) Scattering of macroinvertebrates as an indicator of water quality by using biological monitoring working party - average score per taxon method. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Sources of water must be monitored regularly to determine the status of water quality. Poor water conditions are not only an indicator of environmental degradation but also a threat to the ecosystem. Little evidences have been made on the streamflow of Gunung Belumut waterfall to obtain an overview of the diversity of macroinvertebrates and its interaction with water quality. This research intends to delve into the taxonomy richness of macroinvertebrates in water quality monitoring by using Biological Monitoring Working Party-Average Score Per Taxon (BMWP-ASPT) method and were referred to a set of references by BMWP-England and BMWP-Costa Rica and the BMWP-ASPT used in Malaysia. Next, the research intends to determine the interaction of physicochemical parameters and Principal Component Analysis (PCA) correlation between macroinvertebrates and water quality. The development of simple guidelines for macroinvertebrate sampling techniques were established with application of BMWP-ASPT method. The water quality recorded that the water quality upstream ranged between 6.27–8. Meanwhile, the water quality of the middle stream ranged from 4.9–5.7. Finally, the downstream recorded a status of almost clean to clean with score value of 6.5. The Simpson’s diversity index (D) resulted in values of 0.806, 0.886 and 0.889 for upstream, middle stream and downstream, respectively. Meanwhile, the Shannon – Wiener index (H’) values were 0.605, 0.895 and -0.024 for upstream, middle stream and downstream respectively. The PCA results show that macroinvertebrate abundance such as Leptophlebiidae, Capnidae, Hydropsychidae, Gyrinidae, Heptageniidae, Coenagrionidae, and Potamidae was mostly influenced by the environmental variables of temperature (25.16 °C–26.16 °C), pH value (6.3–6.8) and dissolved oxygen (6.58 mg/L–7.42 mg/L). Semi-quantitative and quantitative sampling techniques also quantified the outcomes of the macroinvertebrate samples. To conclude, the interaction between aquatic organisms and water quality parameters is important for maintaining the ecosystem of freshwater resources and the monitoring of water quality in Malaysia

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