Electronic Theses and Dissertation

Penelitian ini bertujuan menganalisis struktur komunitas makrozoobentos berdasarkan kelimpahan, dominansi, keanekaragaman, dan keseragamannya di muara kecamatan batee, kabupaten pidie. tiga stasiun ditentukan secara purposive berdasarkan karakter lokasi, masing-masing dengan 5 ulangan sejajar garis muara. sampel makrozoobenthos diambil meng-gunakan transek kuadrat 1×1 m², dengan penggalian substrat sedalam ±5 cm dan penyaringan mesh 0,5 mm. sampel disimpan dalam botol berlabel, didokumentasikan, lalu diidentifikasi di laboratorium biologi laut fakultas kelautan, universitas syiah kuala. parameter kualitas air yang diukur meliputi suhu, ph, salinitas, dan oksigen terlarut (do). nilai indeks keanekaragaman (h') tertinggi ditemukan pada stasiun i 1,41 dan terendah pada stasiun ii 0,52. indeks keseragaman (e) tertinggi juga terdapat pada stasiun i 0,70, sementara nilai terendah pada stasiun ii 0,26. indeks dominasi (c) tertinggi tercatat pada stasiun ii 0,79 dan terendah pada stasiun i 0,46. terdapat korelasi antara nilai oksigen terlarut (do) dan indeks keanekaragaman, yang menunjukkan bahwa kualitas perairan memengaruhi struktur komunitas makrozoobentos. hasil ini memperkuat peran makrozoobentos sebagai bioindikator dalam pemantauan ekosistem muara. kata kunci: makrozoobentos, struktur komunitas, keanekaragaman, dominasi, kualitas air

This study aims to analyze the structure of macrozoobenthos communities based on opinion, dominance, diversity, and uniformity in the estuary of Batee subdistrict, Pidie regency. Three stations were determined purposively based on location characteristics, each with 5 replications parallel to the estuary line. Macrozoobenthos samples were taken using a 1×1 m² quadrat transect, with a substrate depth of ±5 cm and a 0.5 mm mesh filter. Samples were stored in labeled bottles, documented, and then identified at the Marine Biology Laboratory, Faculty of Marine Science, Syiah Kuala University. Air quality parameters measured included temperature, pH, salinity, and dissolved oxygen (DO). The highest diversity index (H') value was found at Station I 1.41 and the lowest at Station II 0.52. The highest evenness index (E) was also found at Station I 0.70, while the lowest value was at Station II 0.26. The highest dominance index (C) was recorded at Station II 0.79 and the lowest at Station I 0.46. There is a correlation between dissolved oxygen (DO) and the evenness index, indicating that DO influences the structure of macrobenthic communities. Keywords: macrozoobenthos, community structure, diversity, dominance, water quality