CSIRO Permanent Rainforest Plots of North Queensland

We present repeated stem measurement data from 20, 0.5 ha (100 m x 50 m) permanent rainforest plots in northern Queensland, Australia from 1971 to 2013. The plots have a rainfall range of 1200 to 3500 mm, represent eleven vegetation types, six parent materials, and range from 15 m to 1200 m above sea level. Except for minor disturbances associated with selective logging on two plots, the plots were established in old growth forest and all plots have thereafter been protected. Plots were regularly censused and at each census the diameter at breast height (DBH) of all stems ≥10 cm DBH were recorded. Data is presented for 10998 individual stems with plot stem densities at establishment ranging from 476 to 1104 stems ha-1. Due to the wide geographical range of the plots, no species dominate, although the families Lauraceae, Rutaceae and Myrtaceae contribute a large number of species. Basal area values at establishment ranged from 28.6 to 63.3 m2 ha-1 and showed no trend of increasing or decreasing over time due mainly to regular disturbance and recovery from natural events such as cyclones. In addition to stems ≥10 cm DBH data, we present height data, floristic data from understory stems (≥50 cm height to

本数据集收录了1971年至2013年间，澳大利亚昆士兰州北部20块永久热带雨林样地的重复茎干测量数据，每块样地面积为0.5公顷（100米×50米）。该批样地的年降雨量跨度为1200至3500毫米，涵盖11种植被类型与6种成土母质，海拔分布范围为15米至1200米。除两块样地曾受选择性采伐引发的轻度干扰外，所有样地均设置于原始老龄林中，且自建立以来均受到严格保护。样地均按固定周期开展普查，每次普查均记录所有胸径（diameter at breast height, DBH）≥10厘米的茎干的胸径数值。本次数据集共收录10998株个体茎干的相关数据，样地建立初期的茎干密度范围为476至1104株·公顷⁻¹。由于样地地理分布范围较广，无单一物种占据群落优势，但樟科（Lauraceae）、芸香科（Rutaceae）与桃金娘科（Myrtaceae）贡献了绝大多数物种。样地建立初期的胸高断面积范围为28.6至63.3平方米·公顷⁻¹，且未随时间呈现明显的增减趋势，这主要归因于周期性干扰以及气旋等自然事件后的群落恢复过程。除胸径≥10厘米的茎干数据外，本数据集还包含茎高数据以及林下茎干（高度≥50厘米至