Composition And Diversity Of Plant Species In The Two Types Of Land Cover Of Natural Laboratory Of Hampangen Educational Forest

Forests are natural resources that contribute to sustaining life support systems. The purpose of this study was to determine the composition and diversity of plant species in the Hampangen Educational Forest Nature Laboratory with the object of research on plant species diversity at growth rates of seedlings, poles, saplings, and trees in the observation plots of secondary swamp forest and swamp scrub. The research was conducted using a combination technique of paths and checkered lines in each of the 30 measurement plots in the two types of observation land. The results showed 52 types of plants found in all types of research land—a total of 42 species in secondary swamp forest and 26 species in scrublands. The types of plants that occupy the highest IVI at all growth levels are Akasia, Jambu-jambu, and Meranti. The Diversity Index of plant species in the study area on both land types was classified as moderate, namely in the range 1,871 - 2,968. The evenness index value (E) of plants in the land cover type of secondary swamp forest and swamp scrub was classified as high in the range of 0.753 - 0.849. The Species Richness Index (R) value of the secondary swamp forest land cover type is classified as high, whereas the swamp scrub land cover type is classified as low, while the average species similarity index in the two land cover types is low.