Use of Macrozoobenthos for Water Quality Monitoring in Ecotourism Area of Prafi River, Manokwari, West Papua

Abstract

The aim of research is to monitor the water quality of some ecotourism sites along Prafi Rivers (Manokwari, West Papua) using macrozoobenthic biotic index, Prati's index and some chemical-physical factors of water. Research was done from July to September 2016. Sampling was performed through Purposive Random Sampling. Macrozoobenthic was collected from each sampling sites in three locations, (upstream, middle stream, downstream) using Surber net and hand net. Water quality was categorized based on Implicit Prati's Pollution index that is derived from DO, BOD5, pH, nitrate, orthophosphate, and water temperature values. Macrozoobenthic data was used to analyze the diversity index and six biotic indices. Result of the study showed that DO, BOD5, pH and nitrate value in all location meet the standard quality for water based on PP. no 82, 2001 class II (fisheries, recreation, animals husbandry, and irrigation). The turbidity value in sites of upstream, middle stream and downstream Subsay and SP3 have made the standard water quality according to WHO for drinking water (<5 NTU). Based on the Prati's index, the water quality was ranging from excellent to acceptable categories with value 0.4-1.9. The taxa richness of macrozoobenthic was 31 taxa. The Shannonwiener diversity index in all stations were more than 2, indicated that the water was not polluted. The water quality of all station showed very excellent up to moderates (based on FBI), very excellent up to very bad (HBI), and excellent up to less polluted (ASPT). Percentage of Ephemeroptera, Plecoptera, and Trichoptera (% EPT) in all station up to 50% (excellent), except in station SP3 upstream (40%). EPT richness value in all station excellent to moderate. It can be concluded that the water quality of Subsay in upstream, middle stream, downstream and downstream of SP3 was excellent. The middle stream of SP3 and middle stream of SP1 has moderate quality, while the water quality in SP3 upstream, SP1 upstream and SPI downstream was bad.

Structure and Dominance of Macrozoobenthos as Biomonitoring Instrument in the Reuleng River, Leupung, Aceh Besar, Indonesia

“…This mangrove litter is utilized by various aquatic fauna [16] and benthic fauna is a very important link in the estuary ecosystem [17]. The abundance and diversity of Macrozoobenthos are also strongly influenced by changes in water quality and the substrates in which they live and Macrozoobenthos as a bioindicator can be based on biotic index [18].…”