Topic
Dipterocarpus zeylanicus
About: Dipterocarpus zeylanicus is a research topic. Over the lifetime, 11 publications have been published within this topic receiving 296 citations.
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TL;DR: In this article, the authors examined the potential for establishing late-successional tree species that dominate the canopy of rainforest by planting within and adjacent to experimental openings that were created within a Pinus caribaea plantation.
Abstract: In the moist tropics, studies have demonstrated poor seedling establishment of late-successional trees on lands cleared of forest. Our study examined the potential for establishing late-successional tree species that dominate the canopy of rainforest by planting within and adjacent to experimental openings that were created within a Pinus caribaea plantation. We tested five canopy tree species (Dipterocarpus zeylanicus, Mesua ferrea, Shorea disticha, S. megistophylla and S. trapezifolia) of tropical forest in south-western Sri Lanka. Seedlings were monitored for 2 years within treatments that removed either three rows or one row of Pinus canopy, a canopy edge treatment and a control that left the canopy intact. The greatest growth and dry mass for all species were in the canopy removal treatments. In particular, S. trapezifolia and S. disticha exhibited the greatest height growth in these treatments. In the three-row canopy removal treatment, M. ferrea had a significantly lower dry mass than the other species. Differences were shown in the number and area of leaves among species. Shorea trapezifolia and, to a lesser degree, S. disticha increased area by increasing leaf production. Dipterocarpus zeylanicus and, to a lesser degree, M. ferrea increased area by increasing the size of individual leaves. Guidelines based on results from this study recommend that species grow best when seedlings are planted within openings created by the removal of three rows of Pinus canopy. Where planting without canopy removal is required, S. disticha or S. megistophylla should be selected because of greater shade and drought tolerance. This experiment demonstrated that Pinus can be used as a nurse for facilitating the establishment of site-sensitive tropical forest tree species that are late-successional. In particular, results have application for similar mixed dipterocarp forest types in southeast Asia.
163 citations
TL;DR: Overall, the best environments for seedling establishment and growth for all species were in the centres of the canopy strips (6–12 m), which contributes to investigations testing the feasibility of using Pinus as a nurse for establishing more shade-tolerant species; and as a technique for forest restoration in south and southeast Asia.
53 citations
TL;DR: Differences among these four species can be logically explained by their sequential competitive exclusion in relation to increasingly limited resources of light and soil water.
38 citations
TL;DR: From the resins of Diptercarpus hispidus, Dipterocarpus zeylanicus and Doona macrophylla, asiatic and 2α,3β,23α-trihydroxyurs-12-en-28-oic acids have been isolated and they contain betulinic acid, dipterocarol, and 3β,20β-dihydroxydammar-23-ene.
32 citations
TL;DR: The strong negative correlation of D. hispidus with Artocarpus nobilis and with Campnosperma zeylanica is indicative of density-dependent inter-species interference in the forest.
Abstract: (1) Pattern in a lowland rain forest in south-central Sri Lanka was investigated by block-size analysis of variance, covariance and correlation coefficient. (2) Four of the six tree species analysed showed one scale of pattern; Horsfieldia irya and Semicarpus parvifolia showed no evidence of pattern. A trend in abundance occurred in Dipterocarpus zeylanicus, which was positively correlated with soilpotassium concentration. The pattern of Dipterocarpus hispidus, the leading dominant, was related to variations in concentration of soil nitrogen and phosphorus, while that of Artocarpus nobilis and Campnosperma zeylanica was interpreted as pattern imposed upon them by the pattern of Dipterocarpus hispidus. The strong negative correlation of D. hispidus with Artocarpus nobilis and with Campnosperma zeylanica is indicative of density-dependent inter-species interference in the forest.
15 citations