REGENERASI ALAMI HUTAN RAWA GAMBUT TERBAKAR DAN LAHAN GAMBUT TERBAKAR DI TUMBANG NUSA, KALIMANTAN TENGAH DAN IMPLIKASINYA TERHADAP KONSERVASI

Abstract

A designated forest with specific purpose (KHDTK) in Tumbang Nusa, is one of peat swamp forest areas where multiple fire occured. This research aimed to analyze composition and diversity of vegetation, regeneration and similarity among different fire history of peatswamp forests, e.g. secondary peat swamp forest (HS), burnt peat swamp forest in 1997 (HT97), multiple fire of peat swamp forest (HT04) and agroforestry on burnt peatland (AF). HT97 and HT04 have different vegetation composition compared with HS. Calophyllum macrocarpum was the commonest tree species in HS, whilst Cratoxylum arborescens was the commonest tree species in HT97 and HT04. Similarity index of Sorensen (IS) between HS and HT97 was relatively high (IS = 62.79%), meanwhile Sorensen index between HS and HT04 was considerably low (IS = 25.81%). Fire reduced tree diversity, which was indicated by low Shannon-Wiener diversity index (H'). H' index in HS was 3.30, whereas H' index in HT97 and HT04 were 2.61 and 1.75, respectively. There were 24 tree species found in forest only; and 66.67% of the species has zoochory dispersal mode. Dispersal mode of the species in different habitat need to be taken into account for conservation practices in KHDTK Tumbang Nusa.