Variasi Struktur Komunitas Lamun di Kawasan Konservasi Perairan Liukang Tangaya, Kabupaten Pangkep, Sulawesi Selatan

Abstract

Ekosistem lamun berperan penting sebagai habitat beragam biota, penstabil sedimen, dan penyimpan karbon, namun informasinya di Kawasan Konservasi Perairan Liukang Tangaya masih terbatas. Penelitian ini bertujuan mengidentifikasi jenis serta menganalisis struktur komunitas lamun pada Area 1, Area 2, dan Area 3. Survei dilakukan pada Oktober 2025 menggunakan metode transek kuadrat mengacu pada panduan COREMAP-CTI di 27 pulau Ditemukan 10 spesies lamun dari dua famili, dengan kekayaan jenis tertinggi di Area 2 (10 spesies), diikuti Area 3 (9 spesies) dan Area 1 (8 spesies). Tutupan lamun berkisar 37,71–44,84% dan tergolong sedang serta kurang sehat, sedangkan kerapatan berkisar 194,87–325,21 ind/m². Thalassia hemprichii berperan utama di Area 1 dan 2, sedangkan Enhalus acoroides di Area 3. Indeks keanekaragaman, keseragaman, dan dominansi masing- masing berkisar 0,81-1,09; 0,58-0,64; dan 0,45-0,57. Similaritas Bray-Curtis berkisar 0,4897–0,8118, dengan kemiripan tertinggi antara Area 1 dan Area 2.

Seagrass ecosystems play an important role as habitats for diverse biota, sediment stabilizers, and carbon storage ecosystems; however, information on seagrass communities in the Liukang Tangaya Marine Protected Area remains limited. This study aimed to identify seagrass species and analyze their community structure in Areas 1, 2, and 3. The survey was conducted in October 2025 using the quadrat transect method following the COREMAP-CTI guidelines across 27 islands. A total of 10 seagrass species from two families were identified, with the highest species richness recorded in Area 2 (10 species), followed by Area 3 (9 species) and Area 1 (8 species). Seagrass cover ranged from 37.71–44.84% and was categorized as moderate and in less healthy condition, while density ranged from 194.87–325.21 individuals/m². Thalassia hemprichii was the dominant species in Areas 1 and 2, whereas Enhalus acoroides was dominant in Area 3. The Shannon– Wiener diversity, evenness, and dominance indices ranged from 0.81–1.09, 0.58– 0.64, and 0.45–0.57, respectively. Bray–Curtis similarity ranged from 0.4897– 0.8118, with the highest similarity observed between Areas 1 and 2.