Struktur dan komposisi jenis mangrove Desa Bonea dan Kodiri, Kabupaten Muna, Sulawesi Tenggara (Structure and composition of mangrove species of Bonea and Kodiri village, Muna regency, Southeast Sulawesi)

<b>Indonesian Abstract:</b> Kondisi ekosistem mangrove di desa Kodiri dengan kondisi baik, karena upaya pengelolaan yang telah dilakukan masyarakat adat secara swadaya. Mangrove di desa Bonea tergolong rusak, karena tingginya tingkat pemanfaatan khususnya pengambilan kayu bakar. Penelitian bertujuan untuk menganalisis struktur dan komposisi vegetasi mangrove di desa Bonea Kecamatan Lasalepa dan desa Kodiri Kecamatan Lohia. Parameter kerapatan relatif, penutupan relatif, penutupan relatif jenis dan Indeks Nilai Penting (INP) digunakan sebagai indikator untuk menggambarkan struktur dan komposisi vegetasi mangrove. Penelitian dilakukan pada bulan Juni sampai bulan Desember 2014 bertempat di pesisir desa Bonea dan desa Kodiri. Analisis data dilakukan di Laboratorium Perikanan STIP Wuna Raha. Pengamatan vegetasi mangrove menggunakan metode kombinasi garis lurus (line transect) dan berpetak sebanyak 3 (tiga) titik pengamatan pada setiap lokasi. Titik pengamatan ditentukan secara sengaja (purposive), berdasarkan keterwakilan kodisi vegetasi mangrove yang dikaji, sehingga terdapat 6 jalur dan 18 petak pengamatan pada dua lokasi. Data vegetasi mangrove dianalisis secara deskriptif-kualitatif. Hasil penelitian, ditemukan vegetasi mangrove di desa Bonea didominasi Ceriops tagal dan Rhizophora apiculata. Penutupan relatif jenis kategori rusak dan kerapatan jenis kategori jarang. Vegetasi mangrove desa Kodiri di dominasi Rhizophora apiculata, Soneratia alba, Bruguera sexangula, Rhizophora stylosa, Soneratia caseolaris, Bruguera gymnorhiza, dan Avicenia marina. Nilai penutupan relatif jenis kategori baik dan kerapatan relatif jenis kategori jarang. <b>English Abstract:</b> The condition of mangrove ecosystem in Kodiri village is in good condition, because the management effort has been done by indigenous community self-supporting. Mangrove in the village of Bonea classified as damaged, due to the high utilization rate, especially the taking of firewood. The research aimed to analyze the structure and composition of mangrove vegetation in Bonea village, Lasalepa district and Kodiri village, Lohia district. Relative density parameters, relative closure, relative closure type and Important Value Index (INP) are used as indicators to describe the structure and composition of mangrove vegetation. The study was conducted from June to December 2014 located on the coast of Bonea village and Kodiri village. Data analysis was conducted at STIP Wuna Raha Fisheries Laboratory. Observation of mangrove vegetation using the method of line transect and 3 (three) observation points at each location. The point of observation was determined purposively, based on the representation of the mangrove vegetation pattern studied, so there were 6 lines and 18 observation plots at two locations. The data of mangrove vegetation were analyzed descriptively-qualitative. Result of research, found mangrove vegetation in Bonea village dominated Ceriops tagal and Rhizophora apiculata. The relative closure of the type of category is broken and the density of this type of category is rare. Vegetation of mangroves Kodiri village dominated Rhizophora apiculata, Soneratia alba, Bruguera sexangula, Rhizophora stylosa, Soneratia caseolaris, Bruguera gymnorhiza, and Avicenia marina. The relative closing value of both category types and the relative density of this type of category are rare.