The Penguluran River and Mbambang River are strategic rivers from an ecological, economic, and social perspective. In the last 5 years there have been flood disasters which can affect the communities within them, for example macroinvertebrates. The aim of the research is the classification of macroinvertebrate habitat groups in Penguluran River and Mbambang River. Research methods uses survey methods and secondary macroinvertebrate data in 2023. Sampling at 25 sites based on different land uses by kicking technique with a hand net (mesh size of 500 μm) in a 10 meter long riffle area. Data analysis using TWINSPAN (Two-way Indicator Species Analysis). TWINSPAN analysis obtained 9 site of group from 25 observation sites (site of groups A–I). Furthermore, the 9 site groups were divided into 3 large groups based on the level of macroinvertebrate sensitivity. Site of group E and F in Argotirto Village and Sumberagung Village have light sensitivity (30%) higher than medium sensitivity (20%) with current vellocity ranges medium to fast, rock and gravel substrates that experience light smoothering, plantation land use (coffee, mangosteen, and cloves) showed light degradation. Site of group A, B, C, H, and I in Argotirto Village, Sumberagung Village, and Sidodadi Village have moderate sensitivity (30%) higher than light sensitivity (20%), current velocity ranges slow to fast, rock substrate and gravel that experienced moderate smoothering, secondary forest land use, plantations (sugar cane, coffee, banana), settlements, and livestock showed moderate degradation. Site of group D and E in Argotirto Village and Sumberagung Village have tolerant sensitivity (36%) than sensitive macroinvertebrates (28%), current velocity ranges medium to fast, rock and mud substrates that experience heavy smoothering, plantation land use (coconut , banana, clove and mangosteen) showed heavy degradation. TWINSPAN analysis of 9 site of group shows light degradation, moderate degradation, and heavy degradation.
Read full abstract