CD Skripsi
Struktur Dan Komposisi Tanaman Bawah Dengan Variasi Tinggi Di Taman Wisata Alam Gunung Marapi Sumatera Barat
Undergrowth plays an important role in forest ecosystems and determines the microclimate. Apart from that, the undergrowth functions as germplasm, a source of medicines and ornamental plants. The aim of this research is to determine the diversity index, evenness index and richness index with variations in altitude in the Mount Marapi Natural Tourism Park, West Sumatra. The method used is the purposive sampling method with plot placement based on dense understory vegetation at three locations with heights of 1.500 masl, 1.700 masl and 1.900 masl with a plot size of 2 x 2 m. The number of plots is determined based on an IS 0,5% so that at an altitude of 1.500 masl 18 plots area created, 1.700 masl 12 plots are created and 1.900 masl 10 plots area created. The structure of the undergrowth can be seen from the INP. The highest INP at an altitude of 1.500 masl is the Kirinyuh (Chromolaena odorata L.) type at 20,58%. The highest altitude of 1.700 masl is the Alang-alang (Imperata cylindrica L.) type at 25,3% and the highest altitude of 1.900 masl is the Harendong Bulu (Clidemia hirta) type at 29,1%. The composition of understory plants at an altitude of 1.500 masl contains 34 species and 22 families. At an altitude of 1.700 masl there are 30 species and 20 families. At an altitude of 1.900 masl there are 17 species and 14 families. The diversity index at an altitude of 1.500 masl, 1.700 masl and 1.900 masl is respectively (H’): 3,08 (high), (H’): 2,9 (currently), (H’): 2,6 (currently). The Evenness Index at an altitude of 1.500 masl, 1.700 masl and 1.900 masl has a value of (E): 0,87 (high), (E): 0,84 (high) and (E): 0,91 (high). The Wealth Index at an altitude of 1.500 masl, 1.700 masl and 1.900 masl has a value of (R1): 4,4 (currently), (R1): 4,2 (currently) and (R1): 2,4 (low).
Keywords: undergrowth, diversity, evennes, wealth, height, Mount Marapi
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