Structure and regeneration dynamics of tropical dipterocarp rain forest in varying degrees of management

1.本文对Gunung Niut自然保护区及其邻近地区的植被进行了研究，共设24个样地（9.1公顷）。每公顷样地有300 ~ 370种树围大于15 cm的树种。在研究过程中发现了1300多个树种。优势科龙脑香科有近60种。然后是各种各样的植被。土壤和植被大致相关。土壤类型的多样性远小于植被的多样性。对西加里曼丹、东加里曼丹和西苏门答腊三个赤道地区的植物群进行了比较。常见的种类只有几种。这一结果显示了该地区植被的高度多样性，也说明了对该地区植被进行深入研究的必要性.种群动态1993年龙脑香天然林的许多树木结果。研究了几个树种的结果量和成苗情况。林分优势种为白氏鳞毛蕨，平均每m^2产果74个，其中完好果占42%。1.8株/m^2的幼苗在一个月后形成。对这些幼苗进行标记，并定期进行普查.林分动态在7块样地上测定了1 ~ 2年的林木生长量。砍伐的森林里有许多龙脑香科的树苗。它们茁壮成长。在不受干扰的情况下，龙脑香林是可以恢复的。轮垦后的田地通常以血桐树为主。它们被分成两组，快速生长的树和不生长的树。百年藤卡旺种植园生长稳定。这种树木生长的测量也将继续进行。

1. Vegetation of West KalimantanVegetation of Gunung Niut Nature Reserve and its adjacent area West Kalimantan was studied with 24 plots (9.1 ha in total). Plots of 1 ha had 300 to 370 tree species bigger than 15 cm in girth. More than 1300 tree species were found during the study. The dominant family, Dipterocarpaceae had nearly 60 species. Then there were a variety of vegetation.The soil was roughly correlated with the vegetation. The diversity of soil type is much less than that of vegetation. Then the diversity of the latter could not be explained by the former.The flora in three equatorial areas, West Kalimantan, East Kalimantan, and West Sumatra was compared with each other. The common species were only several percents. This result shows the high diversity of this region and the necessity of a lot of study to recognize the vegetation of the whole area.2. Population dynamics Many trees of a natural dipterocarp forest made fruits in 1993. We studied the amount of fruit and establishment of the seedlings of several species. The dominant species of the forest, Dryobalanops beccarii, made 74 fruits/m^2 and 42% of them were sound. The seedlings of 1.8/m^2 were established after one month. These seedlings were tagged and censused periodically in future.3. Forest DynamicsTree growth for 1 or 2 years was measured in 7 plots. The logged forest had many saplings of Dipterocarpaceae. They grew vigorously. The dipterocarp forest will be recovered in future, if the stand will not be disturbed again. Fields after shifting cultivation were usually dominated by Macaranga trees. They were separated into two groups, quick growth trees and no-growth trees. Tengkawang plantation of 100 years old grew steadily. This measurement of tree growth will be also continued.