Pratiknyo H, Ahmad I, Bambang Heru Budianto BH. 2018. Diversity and abundance of termites along altitudinal gradient andslopes in Mount Slamet, Central Java, Indonesia. Biodiversitas 19: 1649-1658. A study on diversity and abundance of termites along analtitudinal gradient and the different slope was done in plantation forest of Mount Slamet. This research aimed to define the speciescomposition along the altitudinal gradient and slope and to define the environmental factors affecting it. The sampling of termites wascarried out following standardized belt transects (100 m x 2 m) laid vertically on the altitude of 700 up to 1300 m asl on four slopes.Each 100 m length of the belt transects was divided into 20 sections (5 m x 2 m), and termites were taken in each section from the trees,branches, barks and the ground. Data of termites composition were analyzed for diversity index (Shanon-Wiener, H') and dominationindex (Simson, D); the correlation among environmental factors with the family were analyzed by multivariate correlation, and then aCanonical Correspondence Analysis (CCA) was used to define the most associated environmental factor to the diversity and abundanceof termites. A total of 7349 individuals belonging to 11 species in nine genera, five subfamilies, and two families were recorded. Fourwood feeder species were Schedorinotermes javanicus, Macrotermes gilvus, Odontotermes javanicus and Microtermes insperatus, whilehumus feeder was Capritermes samarangi, Procapritermes stiger, Nasutitermes matangensis, N. matangensiformis, Bulbitermes spp.,and the soil feeders were PeriCapritermes javanicus and P. dolichocephalus. Based on the Shanon-Wiener index, the Western Slopewas the highest in diversity with five main environmental factors (altitudes, maximal rainfall, N content, manure application and lightintensity) the most influencing while the CCA ordination showed that the canopy closure and light intensity were the most associatedfactor to the diversity and abundance of termites. In conclusion, the slopes