Population Dynamics of Pometia for The Period of Post-Selective Logging in Tropical Rainforest, Southern Papua, Indonesia

Abstract

Tropical rainforest changed in term of structure, composition and population, resulting from logging. One of target trees during logging is Pometia. Our goals of this research were to answer that (1) How were survival, growth, fecundity and population growth rate (λ) of Pometia within remnant stands?; (2) what were driving factors to explain population dynamics of Pometia within logged forest?. Data were derived from three hectares-permanent sample plot (PSP) in logged forest of PT Tunas Timber Lestari. Integral Projection Models (IPMs) were applied to analyze population dynamics. The study showed dynamically that probability of the individuals of Pometia survived in this area did not significantly differ among their size, while stands showed the significant difference between small and large individuals. The growth of both individuals of Pometia and stands varied significantly in different size. The probability of fecundity both Pometia and stands were significantly different among size. The population of Pometia has been increasing for about a decade as the population of all stands was growing as well. Moreover, the regular documentation of species composition and structure before and after logging is necessary as a control of biodiversity. Therefore, a proper protocol to monitor the biodiversity should be designed by government and disseminated it to logging companies.

Tree species diversity of Pegunungan Bintang, Papua, Indonesia as potency of wood supply

“…Therefore, the stock of small trees as future trees are available in this forest regardless of the particular species. Then, the forest would grow naturally as the character of old-growth forest (Murdjoko 2013;Murdjoko et al 2016b). This forest also benefits other biotic factors to promote the sustainability of tropical rain forest.…”

“…This condition causes the need for forest resources, in this case, timber forest products, to become an established economic mechanism. This condition is currently the reason that this tropical forest area can provide economic functions to humans (Kuswandi and Murdjoko 2015;Murdjoko et al 2016b). For example, currently, timber forest products are products from tropical forest areas that have been utilized and become part of the economic cycle.…”

Recovery of Residual Forest Ecosystem as an Impact of Selective Logging in South Papua: An Ecological Approach

“…2012), et al tree density (Decocq . 2014), tree growth rate et al (Murdjoko 2016b) and association patterns et al among biotic factors, light availability, ambient moisture, temperature, soil properties and litterfall stock as abiotic factors (Murdjoko et al 2016c). Tree communities were formed as responses of each tree characteristics toward different ecological circumstances in logged forests.…”

“…Upperstory tree community in the log ged forests showed a dynamic establishment of tree community. Each species had different growth rate as a response to logging impact (Murdjoko et al 2016b). Some species had higher population growth rate than others leading to higher survival rate (Murdjoko 2013;Zuidema et al 2009).…”

“…Few studies concerning the effects of logging in Papua logged forests were conducted. Some studies focused only on damages, changes in basal area (Gandhi & Mitlöhner 2014), population dynamics of remaining trees (Murdjoko 2013 ;Kuswandi & Murdjoko 2015;Murdjoko 2016b) and et al biomass stock change (Hendri et al 2012). Therefore, it is necessary to analyze forest recovery using the ecological approach in South Papua.…”