Exploration, collection, and conservation of dipterocarps in Riau Islands

Abstract

Subiakto A, Rachmat HH. 2015. Exploration, collection and conservation of dipterocarps in Riau Islands. Pros Sem Nas Masy Biodiv Indon 1: 428-433. The diversity and richness of dipterocarps in Sumatera mainland have been well documented and known throughout the world. On the other hand, the existence and the diversity of dipterocarps in small islands along the eastern part of Sumatera mainland, which is directly bordered with neighboring countries of Malaysia and Singapore have not been thoroughly studied. Phylogeography of dipterocarps species from small islands particularly in the eastern part of Sumatra region is important information to reveal evolution history and their distribution. The aim of this research was to record the dipterocarps species growing naturally in each islands surrounding eastern part of Sumatra mainland and to collect genetic materials for preservation and ex-situ conservation effort. Exploration was carried out in the island of Lingga, Singkep, Bintan, Batam, and Bunguran (Natuna Islands). A total number of the species found for each of the islands was as follow Lingga 13 species, Singkep 2 species, Batam 7 species, Bintan 10 species, and Bunguran 21 species. A number of genetic materials taken for each of the islands were 5900, 329, 25, 160 consecutively for the island of Lingga, Bintan, Batam and Bunguran. Wildings were kept and treated in shaded-high humidity nursery chamber and after 90 days of care, the shading was gradually decreased