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首页> 外文期刊>Indonesian Journal of Forestry Research >CHANGES IN THE SPECIES COMPOSITION, STAND STRUCTURE AND ABOVEGROUND BIOMASS OF A LOWLAND DIPTEROCARP FOREST IN SAMBOJA, EAST KALIMANTAN
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CHANGES IN THE SPECIES COMPOSITION, STAND STRUCTURE AND ABOVEGROUND BIOMASS OF A LOWLAND DIPTEROCARP FOREST IN SAMBOJA, EAST KALIMANTAN

机译：东加里曼丹省桑博贾低地双足动物森林的物种组成，结构和生物量的变化

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摘要

The dynamics of species composition, stand structure and aboveground biomass were studied over a 4.3-yr period (December 2004 – April 2009) in a lowland dipterocarp forest of Samboja, East Kalimantan. This study was conducted in six permanent sample plots (100 m x 100 m each) distributed over an area of 26.5 ha of Samboja Research Forest. All woody plants = 10 cm dbh (diameter at 1.3 m aboveground) were identified. In December 2004, 2.143 trees were measured in the six plots, consisting of 39 families, 82 genera and 111 species. The condition in April 2009 (after 4.3 yr) was: 2,466 trees, 40 families, 86 genera and 123 species. Most species were found in both occasions. Fourteen new species were registered, which contributed to 9.8% of a net addition of the total number of species found in the six plots. Over the 4.3-yr period, there was also an increase of 15.1% in density, 12.9% in basal area, and 11.6% in aboveground biomass, respectively. The density increased from 357 to 411 trees per ha; the basal area increased from 20.09 to 22.67 m2 ha-1; and the aboveground biomass increased from 286.3 to 319.4 ton ha. The family Dipterocarpaceae was the richest in species (more than 20 species found in both occasions), followed by Euphorbiaceae, Burseraceae, Fabaceae, and Anacardiaceae (more than five species). Most genera (80%) contained just one species, but Shorea with 13 species was the richest. Four families (Dipterocarpaceae, Fabaceae, Myrtaceae and Lauraceae) contained more than 80% of the aboveground biomass in both occasions (75% of them from Dipterocarpaceae family). The increases in species richness and density did not cause any significant differences in the diversity index and diameter distribution. This condition suggested that forest vegetation of the study site maintains its diversity composition and structural features over the period of study.
机译：在东加里曼丹省Samboja的一个低地龙脑香树林中，研究了4.3年（2004年12月至2009年4月）物种组成，林分结构和地上生物量的动态。这项研究是在分布于Samboja研究林26.5公顷的六个永久性样地（每个100 m x 100 m）中进行的。确定了所有= 10 cm dbh（地上1.3 m的直径）的木本植物。 2004年12月，在6个样地中测量了2.143棵树，包括39个科，82属和111种。 2009年4月（4.3年后）的状况是：2,466棵树，40个科，86属和123种。两次都发现了大多数物种。登记了14个新物种，占六个样地中发现物种总数的9.8％。在4.3年期间，密度分别增加了15.1％，基础面积增加了12.9％，地上生物量增加了11.6％。密度从每公顷357棵增加到411棵;基础面积从20.09增加到22.67 m 2 ha -1 ;地上生物量从286.3吨增加到319.4吨公顷。龙脑香科是物种最丰富的物种（在两种情况下均发现超过20种），其次是大戟科，牛科，豆科和漆树科（超过5种）。大多数属（80％）仅包含一个物种，但肖拉州的13个物种是最丰富的。在两种情况下，四个科（龙脑香科，豆科，桃金娘科和月桂科）都含有超过80％的地上生物量（其中75％来自龙脑香科）。物种丰富度和密度的增加并未引起多样性指数和直径分布的任何显着差异。这种情况表明，研究地点的森林植被在研究期间保持了其多样性组成和结构特征。

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