Structure and Distribution of Rasamala (Altingia excelsa Noronha) and Jamuju (Dacrycarpus imbricatus Blume de Laub.) in Gunung Gede Pangrango National Park. Case Study of Cimande and Selabintana Resort

Muhammad Maz’um Dahlan, Istomo Istomo, Cahyo Wibowoc

Abstract


The observation of structure and distribution of A. excelsa dan D. imbricatus was carried out in Cimande and Selabintana Resort of Mount Gede and Pangrango National Park (MGPNP). There were three square plots of 50 x50 m established purposively within the Sub Montane and Montane Zone of both Resorts. For the regeneration observation purpose, each of the plots are divide to smaller squares of different sizes: (1) 10 x 10 m (poles); (2) 5 x 5 m (saplings), and (3) 2 x 2 m (seedlings). The result shows that the highest Importance Value (IVI) of A. excelsa is at tree stage in the Sub Montane Zone of Selabintana Resort (26.3%), while the highest IVI for D. imbricatus is at tree stage in the Montane Zone of Cimande Resort (24.8%). The distributional pattern of both species is grouped (Ip : 0.5 – 0.8) with the stand structure concentrates on large diameter class.

The densest A. excelsa species is in the Sub Montane Zone of Selabintana Resort (35.4%) on 51 – 60 cm diameter class., while for D. imbricatus is in the Montane Zone of Cimande (25%) on 41 – 50 cm diameter class. Furthermore, the result of the CCA (Canonical Correspondence Analysis) method shows that A. excelsa is characterized by n-total, cec, bulk density, and c-organic. Meanwhile, the same analysis shows, that D. imbricatus is characterized by canopy closure, temperature, humidity, soil pH, sloping area and c-organic

 


Keywords


Altingia excelsa; Dacrycarpus imbricatus; distribution; structure; MGPNP.

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