THE RECOYERY OF PLANT SPECTES DIVERSITY IN 14 YEAR-OLD FOREST IN REHABILITATED MINED LAND IN CENTRAL BENGKULU

Wiryono, Wiryono and James, Byekher Douni (2015) THE RECOYERY OF PLANT SPECTES DIVERSITY IN 14 YEAR-OLD FOREST IN REHABILITATED MINED LAND IN CENTRAL BENGKULU. In: The 2nd Society for Indonesian Biodiversity International Conference , 6-8 November 2012, Lombok, West Nusa Tenggara, Indonesia.

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Abstract

Coal mining in Indonesia has not only caused cdrbon emission into the atmospbere, but also drastically changed forest ecosystems rich in biodiversity into degraded lands. The mining companies are required by the government to rehabilitate the degraded mined land. Most companies use fast growing species to revegetate the mined land, resulting in a single or few species forest stand. But if the rehabilitated land is left undisturbed, natural succession will finally return the vegetation into its original forest type. The objective of this study was to know the species composition of a l4-yen-old vegetation growing in mined land revegetated with Acacia ntangium. The results showed that after L4 years, the forest had 3 species of trees, 13 species of shrub and saplings, and 16 species of herbs and seedlings. The highest inrportant values were A. mangium for trees, Leea aequata for saplings dan shrub, and Wedelia trilobata for herbs and seedlings. No saplings and seedlings of A. mangium were found, indicating that A. mangiunt failed to regenerate. Sorensen Index of similarity in species composition of shrub and trees between thisl4-year old forest and natural forest was only 6.4o/o, but the index was higher between this forest and the secondary forest, namely 38.7%. The results indicate that although the land was planted with a single species, A. mangium, natural succession has increased the plant diversity, and in the future A. mangium will be replaced by diverse native species, which are now in the stages of saplings and seedlings.

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