This study aims to determine the biophysical potential of mangrove ecosystems in situ, suitability of eco-tourism and ecotourism carrying capacity of mangrove in Ponelo Island. This study was conducted in May-November 2019 is located on the island of Ponelo. The method used was quadrant transect method, travel suitability analysis, and the carrying capacity of the region. Mangrove biophysical potential is calculated based on the criteria IVI. Eligibility Criteria is observed Travel mangrove thickness, density, types of mangroves, tidal and biota. Carrying capacity of the region judged based on the maximum amount of capacity. The results showed that the distribution of mangrove area Ponelo Island is 129.1743 ha and Importance Value Index (IVI) with the highest tree found in Rhizophora mucronata (93 524%) and the lowest type of Avicennia marina (0.481%). Travel Suitability Index (IKW) category of the highest degrees of thickness 217, 93 m (station Ponelo village) and the lowest was 156.59 m (Village station Malambe), the density of the mangrove between 13.30 - 15.85 Ind / m by the number of mangrove species found are 16 species, and there are 29 types of biota. Tidal conditions on the island Ponelo is 0-195 m. Suistability ecotourism on the island mangrove Ponelo including category (S2) in accordance with IKW value of 76.32% - 77.63% to (S1) is in accordance with IKW value of 89.47%. The carrying capacity of mangrove ecotourism area is 5711 m2 with a capacity of visitors reached 457 people / day. Suistability ecotourism on the island mangrove Ponelo including category (S2) in accordance with IKW value of 76.32% - 77.63% to (S1) is in accordance with IKW value of 89.47%. The carrying capacity of mangrove ecotourism area is 5711 m2 with a capacity of visitors reached 457 people / day. Suistability ecotourism on the island mangrove Ponelo including category (S2) in accordance with IKW value of 76.32% - 77.63% to (S1) is in accordance with IKW value of 89.47%. The carrying capacity of mangrove ecotourism area is 5711 m2 with a capacity of visitors reached 457 people / day. This research was AIMD to Determine biophysical potential of the mangrove ecosystem in situ, the suitability of ecotourism, and the carrying capacity of the mangrove in Ponelo Island. This research was conducted in May-November 2019 with was held in Ponelo Island. The method used is the transect method quadran, tourism suitability analysis, and the carrying capacity of the region. The biophysical potential of mangroves is calculated based on IVI criteria. The tourism suitability criteria chosen are mangrove thickness, density, type of mangroves, tides, and biota. The carrying capacity of an area is based on the maximum amount of capacity. The results Showed that the acre of mangrove distribution in Ponelo Island was 129, the highest importane haand 1743 value index (IVI) at the tree levels was found Rhizophora mucronata species (93. 524%) and cancel Avicennia marina species (0.481%). Tourism conformance index (TCI) the highest thicknes category level is 217.93 m (Ponelo Village Station) and the Lowest is 156.59 m (Malambe Village Station), the level of mangrove density is between 13.30 to 15.85 Ind / m with the total of mangrove species found are 16 types, and there are 29 types of biota. Tidal condition on Ponelo Island are 0-195 m. The suitability level of mangrove ecotourism in Ponelo Island is included in the category (S2) According to the TCI value of 76.32% - 77.63% to (S1) very much in accordance with the TCI value of 89.47%. The carrying capacity of visitors reaching 457 people / day. the level of mangrove density is between 13.30 to 15.85 Ind / m with the total of mangrove species found are 16 types, and there are 29 types of biota. Tidal condition on Ponelo Island are 0-195 m. The suitability level of mangrove ecotourism in Ponelo Island is included in the category (S2) According to the TCI value of 76.32% - 77.63% to (S1) very much in accordance with the TCI value of 89.47%. The carrying capacity of visitors reaching 457 people / day. the level of mangrove density is between 13.30 to 15.85 Ind / m with the total of mangrove species found are 16 types, and there are 29 types of biota. Tidal condition on Ponelo Island are 0-195 m. The suitability level of mangrove ecotourism in Ponelo Island is included in the category (S2) According to the TCI value of 76.32% - 77.63% to (S1) very much in accordance with the TCI value of 89.47%. The carrying capacity of visitors reaching 457 people / day.

Keywords : Mangrove, Mangrove Ecotourism Suitability, Carrying Capacity, The Suitability of Mangrove Ecotourism.