PERAN KERANG PENYARING PARTIKEL TERHADAP KERAGAMAN MAKROBENTHOS DI AGGREGASI KERANG
Abstract
Tujuan penelitian ini adalah untuk mengetahui distribusi jenis, kelimpahan, keragaman, dan kesamaan makrobenthos yang berada di dalam posisi aggregasi di lokasi berbeda. Observasi telah dilakukan di 2 stasion Tiwoho dan Blongko, selama April, 2021. Makrobentos diambil dengan meletakan ‘Core’ (PVC) dengan diameter 15 cm pada posisi tengah dan pinggir aggregasi besar, serta aggregasi kecil di 2 lokasi. Materi yang ada di dalam ‘Core’ diangkat, dimasukkan di dalam plastik yang berlabel, selanjutnya disortir, diidentifikasi, dihitung, dan foto di laboratorium. Pengambilan sampel dilakukan sebanyak 4 kali sebagai ulangan pada posisi aggregasi yang berbeda. Jumlah jenis dan individu makrobenthos dianalisa dengan menggunakan 2 Arah ANOVA, di mana posisi dalam aggregasi dan stasion adalah sebagai faktor utama. Mengetahui keragaman dilakukan melalui perhitungan Indeks ‘Simpon’ dan kesamaan dengan Indeks ‘Evenness’. Hasil menunjukkan bahwa jumlah jenis dan jumlah individu (kelimpahan) makrobenthos bervariasi di antara posisi dalam aggregasi kerang, namun tidak dipengaruhi oleh baik posisi dalam aggregasi dan stasion. Keragaman dan kesamaan jenis makrobenthos dikategorikan tinggi, walaupun baik ‘Indeks Simpson’ dan ‘Evenness’ bervariasi dan tidak konsiten di antara posisi dalam aggregasi dan stasion. Jumlah individu (kelimpahan) makrobenthos nampak bebeda di antara posisi aggregasi di lokasi Blongko berdampak pada perbedaan stabilitas makrobenthos untuk kedua lokasi.
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DOI: http://dx.doi.org/10.15578/bawal.15.1.2023.1-13
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