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

1.西加里曼丹植被研究古农牛自然保护区及其邻近地区西加里曼丹植被共24个样地(共9.1公顷)。1公顷的地块有300到370个树种，树种的周长超过15厘米。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。土壤与植被大致相关。土壤类型的多样性远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岛三个赤道地区的植物区系进行了比较。常见物种只占总种数的几个百分点。这一结果表明，该地区具有较高的多样性，有必要对整个地区的植被进行大量的研究。种群动态：1993年，龙脑果天然林的许多树都结果了。对几个树种的结实量和成苗率进行了研究。林木优势种贝氏鳞毛虫每平方米结实74个，完好率为42%。1.8株/m^2的苗木在1个月后成苗。对这些苗木进行定期标记和普查。森林动态在7个样地中测量了1年或2年的树木生长。被砍伐的森林里长着许多龙脑香科树苗。他们的发展势头强劲。如果林分不再受到干扰，龙脑果林将在未来得到恢复。轮作后的田地通常以通心果树为主。它们被分成两组，快速生长的树和不生长的树。百年腾卡旺人工林稳步发展。这种对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.