Buchori D, Rizali A, Rahayu GA, Mansur I. 2018. Insect diversity in post-mining areas: Investigating their potential role as bioindicator of reclamation success. Biodiversitas 19: 1696-1702. Reclamation can be a pivotal process to return an ecosystem to its condition prior to human disturbance, by recreating a landscape so that its structure and function closely resemble a natural community. Unfortunately, there is a lack of empirical data as to whether reclamation efforts successfully establish sustainable of the ecosystem or not. The objective of this research was to study insect diversity in post-mining areas and investigate their potential role as bioindicators of reclamation success. An ecological research was conducted in post-mining reclamation areas managed by PT. Berau Coal in Binungan, East Kalimantan. We selected sub-areas that had been subject to reclamation efforts for varying periods, ranging from 2 to 10 years, for observation. We also used an area of undisturbed natural forest as a comparison. Inside each of these subareas of different reclamation age, insects were sampled using pitfall traps and malaise traps along a 100-meter transect. Our results showed that insect diversity differed in areas of different reclamation age. Based on CCA revealed that environmental factors i.e. pioneer tree age, vegetation diversity and soil chemistry (N total) affected the diversity of insects in the reclamation area. In particular, NMDS analysis showed different species composition in ant communities found in subareas of varying reclamation age. We conclude that ants are the most useful potential bioindicator to assess reclamation success in post-mining areas.

ABSTRAKReklamasi adalah salah satu teknik untuk memulihkan ekosistem yang rusak, dengan tujuan mengembalikan kondisi habitat, seperti atau menyerupai kondisi sebelumnya. Salah satu komponen habitat yang perlu dikembalikan adalah komunitas serangga. Penelitian ini bertujuan untuk mempelajari keanekaragaman, peranan fungsional, dan komposisi Coleoptera pada area reklamasi. Penelitian dilakukan di area reklamasi bekas tambang batubara, PT. Berau Coal di Kabupaten Berau, Kalimantan Timur. Area reklamasi terdiri atas beberapa umur revegetasi berbeda, yaitu 2, 4, 6, 8, dan 10 tahun. Pengambilan contoh dilakukan dengan melakukan pemasangan perangkap pitfall dan perangkap malaise pada transek sepanjang 100 meter untuk setiap umur revegetasi. Hasil penelitian menunjukkan bahwa keanekaragaman Coleoptera antar umur reklamasi tidak menunjukkan perbedaan. Umur reklamasi cenderung mempengaruhi perbedaan komposisi spesies dan peranan fungsional Coleoptera. Kelimpahan Coleoptera predator menunjukkan perbedaan pada umur reklamasi yang berbeda, sedangkan kelimpahan Coleoptera herbivor, detritivor dan mycophagus tidak dipengaruhi oleh umur reklamasi. Walaupun demikian, terdapat kecenderungan peningkatan kelimpahan Coleoptera dari kelompok herbivor dan detritivor dengan peningkatan umur reklamasi.Kata kunci: Coleoptera, kekayaan spesies, kelimpahan, kumbang, peran fungsional ABSTRACTReclamation has an important role in the recovery of mined land ecosystems and is expected to restore the diversity of insects such as Coleoptera. Reclamation process can change Coleoptera diversity and formed communities new of functional groups. The objective of this research was to study the diversity, functional role, and composition of the Coleoptera in the reclamation area. This ecological research was conducted in reclamation area of PT. Berau Coal in Binungan, Berau District, East Kalimantan. Several ages of reclamation area were selected for observation i.e. 2, 4, 6, 8 and 10 years and also natural forest as comparison. Insects were sampled using pitfall trap and malaise trap in a 100 meter transects for each age revegetation. The results showed that there is no difference in the diversity of Coleoptera between age of reclamation. Age of reclamation tend to affect the composition species and functional role of Coleoptera. Abundance of predatory Coleoptera show differences in different reclamation ages, while the abundance of other functional group (herbivor detritivor and mycophagus) does not seen to be influenced by age of reclamation. Nevertheless, there