Nento et.al: Parameter Ekologis Sebagai Dasar Pengelolaan Bivalvia p-ISSN 2550-1232 e-ISSN 2550-0929 ©Jurnal Sumberdaya Akuatik Indopasifik, Vol. 3 No. 2 November 2019, www.ejournalfpikunipa.ac.id 141 PARAMETER EKOLOGIS SEBAGAI DASAR PENGELOLAAN BIVALVIA DI EKOSISTEM LAMUN DI KECAMATAN PONELO KEPULAUAN KABUPATEN GORONTALO UTARA Ecological Parameters as the Basis of Bivalvia Management in the Peace Ecosystem in Ponelo District, Islands North Gorontalo District Riskawati Nento 1 , Hasim 1* , Ramli 2 1 Magister Ilmu Kelautan dan Perikanan, Universitas Negeri Gorontalo, Gorontalo, 96128, Indonesia 2 Biologi, Universitas Negeri Gorontalo, Gorontalo, 96128, Indonesia *Korespondensi: hasim@ung.ac.id ABSTRACT This research was conducted in May-September 2019. This study aimed to examine ecological parameters as a basis for the management of bivalves in seagrass ecosystems. The method used in determining the observation point is the quadratic linear transect method with a systematic perpendicular direction using a 1x1 m transect. All bivalves found in transects / quadrants are counted and identified. The sampling locations were divided into 4 (four) stations, namely Station I representing Otiola Village, Station II representing Ponelo Village, Station III representing Malambe Village, and Station IV representing Tihengo Village. Observations at the study site found several types of seagrass ecosystems including Enhalus acoroides, Halodule pinifolia, Thalassia hemprichii, and Cymodocea raotundata. Furthermore, 8 (eight) types of bivalves were found which were divided into 4 (four) stations namely Isognomon isognomum, Pinna muricata, Semele crenulata, Tellina virgata, Trachycardium subrugosum, Spondylus tenellus, Tapes sulcarius, Anadara pilula. The highest abundance index is Tellina virgata found at station I with a value of 77.78%. Dominance index for the highest at station II with a value of 0.88 in the high category. Diversity index (D ') with a value of 0.63 is in the medium category III station. The results of measurements of water quality parameters contained in each station are Station I has a temperature of 30 0 C, 31 ppt salinity, pH 7, brightness 2.1 m/%, sandy substrate conditions. Station II has a temperature of 29 0 C, salinity 30 ppt, pH 7.4, brightness 2.0 m/%, sandy substrate conditions. Station III has a temperature of 29 0 C, salinity 35 ppt, pH 7.4, brightness 2.5 m/%, sandy substrate conditions. Station IV has a temperature of 28 0 C, salinity 35 ppt, pH 7, brightness 2.7 m/%, sandy substrate conditions. Water quality parameters in Ponelo Kepulauan District is said to be still normal for bivalve life and is still above the water quality standard. Keywords: Bivalvia, Seagrass, Abundance, Dominance, Diversity ABSTRAK Penelitian ini dilakukan pada bulan Mei-September 2019. Penelitian ini bertujuan untuk mengkaji parameter ekologis sebagai dasar pengelolaan bivalvia di ekosistem lamun. Metode yang digunakan dalam penentuan titik pengamatan adalah metode transek linier kuadrat dengan arah tegak lurus sistematis menggunakan transek berukuran 1x1 m. Semua bivalvia yang ditemukan dalam transek/kuadran dihitung dan diidentifikasi. Lokasi pengambilan sampel dibagi menjadi 4 (empat) stasiun yaitu stasiun I mewakili desa Otiola, stasiun II mewakili desa Ponelo, stasiun III mewakili desa Malambe, dan stasiun IV