The spread of non-native plant species collection of Cibodas Botanical Garden into Mt. Gede Pangrango National Park.
The role of botanic garden in spread of invasive alien plant species has concerned of international worldwide. The aim of this research was to study the extent to which non-native plant species from Cibodas Botanical Garden (CBG) invades into natural rainforest of Mt. Gede Pangrango National Park that adjacent CBG. A line transect was made edge-to-interior with 1600 m in distance from CBG boundary. Result showed that distance from CBG was not significant in correlation with tree and tree-let non-native density. Furthermore, presence of existing CBG's plant collection irregularly responsible for spread of non-native species into natural forest. Three invasive species (Cinchona pubescens, Calliandra calothyrsus, and Cestrum aurantiacum) possibly were escape from CBG and it showed edge-to-interior in stems density. The patterns of other species were influenced by presence of ditch across transect (Brugmansia candida and Solanum torvum), transect location along human trail which facilitate Austroeupatorium inulifolium spread into interior forest, and another non-native species (Solanum macranthum and Toona sinensis) did not have general pattern of spread distribution. Overall, botanical gardens should minimize the risk of unintentional introduced plant by perform site-specific risk assessment.