KELIMPAHAN DAN KEANEKARAGAMAN MAKROZOOBENTOS DI BEBERAPA ANAK SUNGAI BATANG LUBUH KECAMATAN RAMBAH KABUPATEN ROKAN HULU

Siti Rahayu, Radith Mahatma, Khairijon '

Abstract


This study was conducted to determine the diversityand abundance of macrozoobenthos in the water creeks of Batang Lubuh, Rambah District. The samples of macrozoobenthos had been taken from 5 stations using Eckman grab. Based on theresults, macrozoobenthos which were consisted of 9 species belongs to three classes ie. Gastropoda, Oligochaeta, andInsecta. The average abundance of macrozoobenthos ranged from 45 to1273 Ind/m2. Composition of macrozoobenthos was dominated by Gastropods (75,36%). The hishest abudance was obtained at station I (1408 ind/m2) and the lowest abudance was obtained at station II (45 ind/m2). The highest diversity Index (H’) of macrozoobenthos was found at Station I (1,971) and the lowest was found at Station II (0), mean while the highest dominance Index of macrozoobenthos was found at Station II (1) and the lowest was found at Station I (0.288). The analysis of water physical and chemical indicated thatthe correlation between diversity of macrozoobenthos and turbidity and also orthoposfat was negative, while the other parameters were positive.

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