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Gunung Halimun-Salak National Park, West Java, on August 2010. The purpose ofÂ research to determine the components and characteristics of each tree species at theÂ study sites associated with biomass, the rate of CO2 assimilation and transpiration.Â Results showed that, the form of classified forest area of primary forest with a littleÂ disturbed. There were recorded 337 individual trees (stem diameter > 10 cm) perÂ hectare from 71 species, 50 genera and 32 families. Lauraceae, Fagaceae, Myrtaceae,Â Rubiaceae and Meliaceae are the 5 most common families found in the plot area, that
is dominated by Altingia excelsa, Blumeodendron elateriospermum, Ardisia zollingeri,Â Gordonia excelsa, Tricalysia singularis, Castanopsis acuminatissima, Knema cinerea,Â Laportea stimulant, Vernonia arborea and Dysoxylum excelsum. Estimated biomassÂ recorded of 304.5 tons dry weight / ha with a carbon content of 152.3 tons / ha ofÂ basal area of 28.89 m2/ha. Quercus oidocarpa, Litsea noronhae, Saurauia nudiflora,Â Castanopsis argentea and Altingia excelsa has recorded the highest photosynthetic
rates compared with other species. While the highest transpiration rate is owned by theÂ Macaranga triloba, Sandoricum koetjape, Prunus arborea, Urophyllum corymbosumÂ and Altingia excelsa.
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