arath Ekanayake, Dithya Angammana, Suranjan Fernando, Pradeep Samarawickrama, Naalin Perera and Sadun Perera IUCN- The World Conservation Union, Sri Lanka Country Office, 53, Horton Place, Colombo 07, Sri Lanka.Tel : 0094-11-2682418, 2694094 [ext.309], Fax : 0094-11-2682470, Email : spe@iucnsl.org, Web : www.iucnsl.org Abstract   A study was carried out in Sri Lankan southwestern lowland tropical rain forests to obtain background information to support decision-making in … [Read more...]

Arsenio B. Ella & Moreno L. Santander Jr. Forest Products Research and Development Institute (FPRDI) Department of Science and Technology, College, 4031 Laguna, Philippines Tel: (+63-49) 536-2377/536-7408, Fax: (+63-49) 536-3630/536-7408 E-mail: Arsie_Ella@yahoo.com ; more8176@yahoo.com Abstract Thirty-two species of palosapis [Anisoptera thurifera (Blanco) Blume ssp. thurifera], naturally growing in the former logging concession of the Eastern Plywood Corporation in … [Read more...]

Portia Gamboa-Lapitan College of Forestry and Natural Resources, University of the Philippines Los Banos Tel. 063-49-5363572, E-mail: portialapitan@yahoo.com and Jung Oh Hyun College of Agriculture and Life Sciences, Seoul National University, Korea E-mail: hyunjung@snu.ac.kr Abstract The genetic diversity of P. malaanonan was previously assessed from isozyme analysis of 61 individuals spread in two elevational sites within Mt. Makiling Forest Reserve (MFR) to identify … [Read more...]

J.L. Zhang1,2, L.Z Meng1,2, K.F. Cao1,3 & Z.F. Xu1 1Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, China 666303 2GraduateSchool of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, China 100039 3Author to whom correspondence should be addressed (caokf@xtbg.ac.cn) Abstract Photosynthetic light responses, diurnal gas exchange and chlorophyll fluorescence were measured from canopy leaves of four Chinese dipterocarp species, Dipterocarpus … [Read more...]

Introduction In the global market, Philippine dipterocarps are well known by their international trade name, Philippine mahogany. This group of tree species has played an important role as the primary export commodity and dollar earner of the Philippines for a long time. Of these, Parashorea malaanonan belongs to the timber group of Light Red Philippine Mahogany. The volume of log export for this species, however, had dramatically plunged during the last decade (Forestry Statistics, FMB, … [Read more...]

1. INTRODUCTION Dipterocarpaceae is a typical plant family of the tropical forest in South-east Asia. The family has wide distribution ranging from India to the Philippines and contains about 470 species of 13 genera. The natural distribution ranges from Borneo to Cambodia, Thailand, Laos, Myanmar, India, Vietnam and China (Yunan, Quangxi, Quangtung and Hainan Island). Dipterocarpaceae has 6 genera and about 50 species in Vietnam where the main natural distribution is in moist and dry … [Read more...]

1. Introduction In 1943 the forest area of Vietnam was estimated to be about 14.3 million hectares, or 43% of the total land area. Owing to long-lasting wars, shifting cultivation, land clearances and over-exploitation, forest coverage was reduced at a rate of about 100,000 ha each year to 27.1% in 1980 and 26.2% in 1985 (Ministry of Forestry 1991). At present, total forest land is about 16 million ha which occupies 48.3% o0f the country’s total land area. By the end of 1999, … [Read more...]