PENENTUAN KUALITAS PERAIRAN DAN SEDIMEN DENGAN PENDEKATAN STUDI IN SITU KOMUNITAS MAKROZOOBENTHOS DI SUNGAI BANGER PEKALONGAN

Abstract

Studi tentang penentuan kualitas perariran dan sedimen dcngan pendekatan studi in situ komuniuts inakrozoobenthos di sungai Banger Pekalongan telah dilakukan selama 4 bulan untuk mengetalmi perbednan karakteristik lingkungan dan struktur komunitas di lokasi tersebut. Pengambilan sampel dilakukan di 5 stasiun pencuplikan. Berdasarkan hasil penelitian, struktur makroinveriebrata benfik di lokasi muara Sungai Donan terdiri dad I spesics Polychneta, 2 spesies Oligochaeta: Pheretima spl dan Pheretima sp2, 5 spesies Gastropoda: Ruhinott tavanni, Lytrrnoea pal tarns, Lymnaea Puhtginosu, Me/counties tubereulata dan rrrau Pus sp., dan I spesies Insecla yaitu Ceratopogonidac. Kualitas perairan dan sedimen di lokasi penelitian ditentukan berdasarkan kondisi lingkongan, jumlah jenis, kelimpahan jenis, dan indeks keanekaragarnan jenis (11'). Berdasarkan faktor-laktor tersebut, kondisi fisika-kimia perairan dan sediinen di stasiun I rclatif Ichth baik sebagai habitat makrozoobenthos dibandingkan stasiun II, III, IN dan VI. Dengan kata lain, ekosistem, di sekitar stasiun I lebih mendukung untuk kehidupan hewan tersebut dibandingkan kawasan stasiun lainnya. The study on determining of water quality and sediment using m situ study of benthic nacrointertebrate community was conducted for four months to know the differences of cmvironmental characieristics and community structure among research areax The observation ad been done at 5 stations which have several kind industry as source of polutan. Based on this study, there were 9 species of benthic macroinvertebrates at Pekalongan River areas that vere calegorized in 4 classes, i.e. 2 species of Oligochaeta: Pheretima sp/ dan Pheretima sp2, species of Gastropoda. Belamya javimica, tymnaea pahistris, Lymnuea ruhiginosa, /le/tinny/es tubercle/a/a dun Hyraullus sp., dan I species of Insecta yaitu Ceratopogonidae. urthermore, water quality had been represented by results of physical-chemical conditions, pecics richness, speces densities and diversity index (H'). Based on these factors, the Physical-chemical conditions at station were relatively better than the rest of stations. /Enviously, the ecosystem of I" station areas were more favourable for macrozoobenthos.