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Nugrahaningrum A, Harianja MF, Nugroho H, Soesilohadi RCH. 2017. Macroinvertebrate diversity role in water quality assessment of Winongo and Gajah Wong rivers, Yogyakarta, Indonesia. Bonorowo Wetlands 1: 31-37. Winongo and Gajah Wong are primary rivers in Yogyakarta Special Region that have important roles for society and surrounding areas, therefore periodical river monitoring is needed. River monitoring can be conducted by utilizing macroinvertebrate diversity. This research aimed to study macroinvertebrate diversity and to analyze water quality of both rivers. Data was collected at the upstream, the middle, and the downstream, 100 m each, by transect method. The diversity and the abundance of macroinvertebrates were analyzed. The results showed that the number of macroinvertebrate families at Winongo was 24, while at Gajah Wong was 26. Based on Shannon-Wiener and Margalef Indexes, the highest diversity was at Winongo upstream, while the lowest one was at Gajah Wong middle zone. Based on Similarity Index, Winongo and Gajah Wong middle zones had the most similar diversity. Based on both scores of Family Biotic Index (FBI) and BIOTILIK Index, Winongo upstream had good water quality, while Gajah Wong middle zone was severely polluted.

Macroinvertebrate diversity role in Water Quality Assessment of Winongo and Gajah Wong Rivers, Yogyakarta, Indonesia