Lapolo N, Utina R, Baderan DWK. 2018. Diversity and density of crabs in degraded mangrove area at Tanjung PanjangNature Reserve in Gorontalo, Indonesia. Biodiversitas 19: 1154-1159. This study was aimed to analyze the diversity and the density ofcrabs in a degraded mangrove area including in the intact mangrove area and the fishponds (the degraded mangrove area).. The datafrom this study could be used as supporting data for decision makers to slow down the degradation of mangrove along the area ofTanjung Panjang Natural Reserve. The observed data i.e diversity and density of crabs were collected using the stratified randomsampling method (10 m x 10 m plot). Environmental parameters suited to crab habitat were also measured. The samples were takenfrom 18 spots. The study shows that 20 species of crabs were obtained within the mangrove area, and 11 species were founded withinthe fishponds area. Interestingly, two species of crabs i.e Varuna yui and Varuna litterata were only founded in fishponds area. Thedensity of crabs in mangrove area ranged between 3.23 ind/300m2 and 4.52 ind/300m2, while the density of crabs in fishponds arearanged between 0.16 ind/300m2 and 0.63 ind/300m2. Further study revealed that characteristics and the age of mangrove trees affectedmacrozoobenthic biota (Gastropods, Bivalvia, Mud Lobster, Polychaeta, and shrimp) as well as fish diversity within mangrove inTanjung Panjang Natural Reserve. These may be important for further restoration program of mangrove ecosystem and the sustainablerestocking for conservation purposes.

Abstract. Utina R, Katili AS, Lapolo N, Dangkua T. 2019. Short Communication: The composition of mangrove species in coastal area of Banggai District, Central Sulawesi, Indonesia. Biodiversitas 20: 840-846. The mangrove ecosystem possesses unique ecological functions. This research is one part of the activities to prepare reports on mangrove condition in Banggai District, Central Sulawesi Province, Indonesia. The objectives of this study were to explore the composition of mangrove species and mangrove zoning in coastal area of Banggai. The data were collected by survey method spread within 16 spots, with a total area of 7,387 hectares. The data were analyzed with descriptive qualitative methods. The results showed that there were 32 families of mangrove plants in Banggai, classified into 53 species, consisting of 25 true mangrove species and 28 associated mangrove species. An endangered species of mangrove was found, i.e., Scyphiphora hydrophyllacea. This endangered species was found only in Tingki-tingki Village and Uwedikan Village (Balean and Potean Island) of Banggai. The pattern of mangrove zoning within the research site follows the pattern of mangrove zoning commonly found all over Indonesia. The Rhizophoraceae family (Bruguiera gymnorhiza, Rhizophora mucronata, Rhizophora apiculata, Rhizophora stylosa, Rhizophora lamarchii and Ceriops tagal) was found more often than the other families in study site. It means that the Rhizophoraceae family had wide distribution area within site.