KEANEKARAGAMAN NEKTON DI PERAIRAN SUNGAI WAY TAHMI, BLAMBANGAN UMPU

Hanifah, Nur Fauziah (2024) KEANEKARAGAMAN NEKTON DI PERAIRAN SUNGAI WAY TAHMI, BLAMBANGAN UMPU. Diploma thesis, UIN RADEN INTAN LAMPUNG.

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Abstract

ABSTRAK Pencemaran sungai merupakan masalah lingkungan yang sering terjadi. Aktivitas masyarakat sekitar, limbah industri yang dibuang di sungai diduga penyebab terjadinya pencemaran. Tujuan penelitian ini untuk mengetahui keanekaragaman nekton dan tingkat pencemaran air di Sungai Way Tahmi Blambangan Umpu. Penelitian ini menggunakan tiga indikator yaitu nekton sebagai indikator biologi, indikator fisika meliputi kecerahan, salinitas dan suhu serta indikator kimia meliputi pH dan DO. Pengambilan sampel dilakukan di tiga stasiun dan setiap stasiun memiliki satu titik dengan metode pengambilan purpossive sampling. Dari hasil penelitian, nekton yang ditemukan berasal dari dua kelas yaitu kelas Actinopterygii dan kelas Malacostraca. Nilai indeks keanekaragaman yang diperoleh berkisar H‟ 1,57-1,68. Nilai indeks menunjukkan keanekaragaman hewan masih tergolong sedang dengan keseragaman merata (E-0,85-0,94) dan dominansi yang terjadi tergolong rendah (C 0,21-0,25). Hasil pengukuran fisika, pada stasiun I memiliki suhu 32,4°C, stasiun II 28°C, stasiun III 29,8°C dengan kecerahan berkisar 0,28m-0,3m dan kandungan salinitas pada setiap stasiun adalah 0. Kadar DO sungai berkisar 7 mg/l - 8 mg/l, pH air di setiap stasiun berkisar 6,98-7,1. Hasil indikator fisika dan kimia disesuaikan dengan baku mutu air PP No.82 2001, dimana hasil indikator fisika masih sesuai dengan kriteria baku mutu air, indikator kimia untuk pH dan DO menyatakan kondisi sungai masih sesuai dengan baku mutu air. Kata Kunci: Sungai Way Tahmi, Nekton, Pencemaran Sungai iv ABSTRACT River pollution is an environmental problem that often occurs. The activities of the surrounding community and industrial waste dumped in the river are thought to be the cause of the pollution. The aim of this research is to determine the diversity of nekton and the level of water pollution in the Way Tahmi Blambangan Umpu River. This research uses three indicators, namely nekton as a biological indicator, physical indicators including brightness, salinity and temperature and chemical indicators including pH and DO. Sampling was carried out at three stations and each station had one point using a purposive sampling method. From the research results, the nekton found came from two classes, namely the Actinopterygii class and the Malacostraca class. The diversity index values obtained ranged from H' 1.57-1.68. The index value shows that animal diversity is still relatively moderate with even uniformity (E-0.85-0.94) and dominance is relatively low (C 0.21-0.25). The results of physical measurements show that station I has a temperature of 32.4°C, station II 28°C, station III 29.8°C with a brightness ranging from 0.28m-0.3m and the salinity content at each station is 0. River DO levels around 7 mg/l - 8 mg/l, the pH of the water at each station ranges from 6.98 to 7.1. The results of the physical and chemical indicators are adjusted to the water quality standards of PP No. 82 2001, where the results of the physical indicators are still in accordance with the standard criteria for water quality, the chemical indicators for pH and DO state that river conditions are still in accordance with water quality standards. Keywords: Way Tahmi River, Nekton, River Pollution

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