LBA-ECO CD-04 Biomass Survey, km 83 Tower Site, Tapajos National Forest, Brazil

This data set contains the results of a biometric tree survey of a 19.25 ha area adjacent to the eddy flux tower at the km 83 logged forest tower site in Tapajos National Forest, Para, Brazil. The survey was done in March 2000. All measurements reported here were taken before the logging began. Diameters of all trees > 35 cm DBH within the 19.25 ha survey area were recorded and trees with DBH between 10 and 35 cm DBH were recorded along three transects with a total area of 2.3 ha (Miller et al., 2004). These data were used to calculate net ecosystem productivity (NEP) and the role of this forest as a carbon source or sink. Biometric data are reported in one comma-delimited ASCII file.

本数据集收录了位于巴西帕拉州塔帕约斯国家森林公园内，邻近千米83径流通量塔的19.25公顷区域所进行的生物量树木调查结果。该调查于2000年3月进行。所有在此报告中提及的测量数据均采集于伐木作业开始之前。记录了调查区域内直径胸高（DBH）大于35厘米的所有树木的直径，并在总面积为2.3公顷的三条样带中记录了直径胸高在10至35厘米之间的树木（Miller等，2004年）。这些数据被用于计算净生态系统生产力（NEP），并分析该森林作为碳源或碳汇的作用。生物量数据以逗号分隔的ASCII文件形式报告。