Habitat factors greatly affect the composition of the mangrove ecosystem. Changes in habitat quality

No abstract

Papua has so many wide lowland areas that cover high diversity in plant from lifeforms. In contrast, there is a lack of information concerning species diversity. The objectives of the research were to describe species of plant life-forms and to analyze conspecific associations between small individuals and large individuals in natural tropical rainforest, south Papua. Then, 46 nested plots were placed systematically in natural tropical rainforest of Boven Digoel Regency, Papua. Density, frequency, dominance and importance value index (IVI) were analyzed to describe plant diversity, while detrended correspondence analysis (DCA) was to describe conspecific association between small individuals and large individuals. Results found 2040 individuals in this forest consisting 194 plant species. Those are from pteridophytes, angiosperms and gymnosperms. The plant life-forms are herbs, orchids, palms, pandans, shrubs, rattans, vines and trees in which of the plant life-forms, trees are the most abundant according to number of species. In the dominant plant species, two types of conspecific association occurred between small individuals and large individuals. Analysis of DCA revealed that there are large plant species grow along with their small individuals. Another type is that small individuals grow far from their large individuals.

Part of forests in Papua is

This research aims to determine the diversity of infraspesific species of Gyrinops versteegii (Gilg.) Domke in the western part of Lombok island. The analysis was made on the variation of wood morphology, wood anatomy, wood phytochemicals and agarwood from five local agarwood populations taken from the forest in the western part of the island of Lombok, West Nusa Tenggara Province. The results showed that there were five groups of agarwood, namely: G. versteegii Beringin, G. versteegii Buaya, G. versteegii Madu, G. versteegii Pantai and G. versteegii Soyun.