Potensi Jenis Dipterocarpaceae di Hutan Produksi Cagar Biosfer Pulau Siberut, Sumatera Barat

<p>The study of<br />Dipterocarpaceae was done in November 2007 in Siberut<br />Biosphere Reserve. This study conducted on threes sample plot<br />of 0.75 ha in primery forest, logged over area (LOA) &lt;1 year<br />and LOA 5 years. The result showed there were three species<br />of Dipterocarpaceae: Dipterocarpus elongatus Korth., Shorea<br />johorensis Foxw. and Hopea mangarawan Miq. The density of<br />tree and pole in primary forest were about 24 individual/ha and<br />13.34 individual/ha, there were 9.3 individual/ha and 4<br />individual/ha in LOA &lt;1 year, than this density were 8<br />individual/ha and 5.34 individual/ha in LOA 5 years. For<br />sapling and seedling, these densities were about 29<br />individual/ha and 5.417 individual/ha in primary forest, 5<br />individual/ha and 3.750 individual/ha in LOA &lt;1 year, 89<br />individual/ha and 883 individual/ha in LOA 5 years.<br />Community couple between primary forest and LOA wich has<br />similarity index value more than 50%; at tree stage, it was<br />68,83% comparing primary forest and LOA &lt;1 year; at pole<br />stage it was 62.62% comparing primary forest and LOA 5<br />years; at sapling stage, there were 53.29% and 66,27%<br />comparing with LOA &lt;1 year and LOA 5 years; at seedling<br />stage it was 88.66% compared to primary forest and LOA &lt;1<br />year. Similarity index between LOA &lt;1 year with LOA 5<br />years, there were 60.26% for tree stage, 90.05% for pole stage<br />and 51.13% for seedling stage.</p>