Soil macroarthropod dynamics in response to environmental disturbances in a forest remnant ecosystem: A case study at Cibodas Botanical Garden

Disturbing the remaining forest ecosystem in the Cibodas Botanical Garden (CBG) has affected the dynamics of the soil macroarthropod communities. This study was conducted in three remaining forest locations in the CBG with different levels of disturbance. Soil macroarthropod samples were collected using the pitfall trap method with 30 traps and analysed using the Shannon-Wiener diversity index, Pielou's evenness, Simpson's dominance, and Margalef's species richness to assess the dynamics of the soil macroarthropod community. This study analysed how these communities respond to different levels of disturbance in the garden, namely Jalan Akar (JA; low), Wornojiwo (WJ; moderate), and Ciismun (CI; high), which were influenced by tourism activities and local environmental conditions. The results showed that individuals from the Hymenoptera group accounted for 60.05% of the total number of soil macroarthropods found. Site WJ, which experienced moderate disturbance, had the highest number of individuals and species richness of soil macroarthropods. In contrast, site CI, which experienced high levels of disturbance, had a lower number of individuals and lower species richness, diversity and evenness indices. Site JA, which experienced low levels of disturbance, exhibited higher diversity and evenness indices. These results demonstrate that disturbance affects the presence of soil macroarthropods at their respective levels of disturbance. However, analysing the spatial distribution of soil macroarthropods in each studied taxon using the Morisita index revealed that they were dominantly clustered and exhibited varied distribution patterns. The study concludes that maintaining minimal disturbance is essential to preserve soil biodiversity and ecological balance in managed forest ecosystems such as the Cibodas Botanical Garden.