Struktur Komunitas Polychaeta Kawasan Mangrove Muara Sungai Kali Lamong-Pulau Galang, Gresik

Abstract

Penelitian bertujuan untuk mengetahui struktur komunitas Polychaeta pada kedalaman 0-5 cm, 5-10 cm, dan 10-15 cm pada 4 stasiun dengan dominasi mangrove Avicennia alba (M1), Bruguiera gymnorrhiza (M2), Rhizophora mucronata (M3), dan Sonneratia alba (M4) di kawasan mangrove muara sungai kali Lamong-pulau Galang. Parameter fisika kimia yang diukur meliputi suhu, pH, DO, salinitas, analisa granulometri (tipe sedimen) dan TOM (Total Organic Matter). Analisa data menggunakan metode deskriptif kuantitatif dan metode ordinasi dengan menggunakan program Canoco for Windows 4.5. Hasil penelitian menunjukkan di kawasan mangrove muara sungai kali Lamong-pulau Galang ditemukan 7 jenis dari 7 famili Polychaeta. Jenis Polychaeta terbanyak adalah spesies Capitella sp. yang ditemukan di stasiun M1 pada kedalaman 5-10 cm, yaitu sebanyak 11 individu (47.5 %) dari total individu yang ditemukan. Polychaeta pada kawasan mangrove muara sungai kali Lamong-pulau Galang memiliki komposisi spesies yang berbeda di setiap stasiun dan kedalaman substrat

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