Forest Inventory of a Northern Hardwood Forest: Watershed 6 1965, Hubbard Brook Experimental Forest

Forest inventory surveys were initiated in 1965,
repeated in 1977, and repeated at 5 year intervals after
that. This is the initial data set and was collected in
summer of 1965. The inventory consists of a total inventory
of all trees >= 1.5 cm diameter-at-breast-height (dbh) on
the whole of the watershed (13.23 ha), as measured in each of
the 208 25 m x 25 m plots. Shrubs, seedlings and small
saplings were also surveyed. These data were gathered as part of the Hubbard Brook
Ecosystem Study (HBES). The HBES is a collaborative effort at
the Hubbard Brook Experimental Forest, which is operated and
maintained by the USDA Forest Service, Northern Research
Station.

本森林清查工作于1965年启动，1977年开展首次重复调查，此后每5年进行一次重复清查。本次提供的为初始数据集，采集于1965年夏季。本次清查针对整个流域（面积13.23公顷）内的所有立木开展全面统计，统计范围覆盖208块25米×25米样地，测量指标为胸径（diameter-at-breast-height, dbh）≥1.5厘米的个体。同时还对灌木、幼苗及幼树进行了调查。本数据集作为哈伯布鲁克生态研究（Hubbard Brook Ecosystem Study, HBES）的一部分采集所得。哈伯布鲁克生态研究是在哈伯布鲁克实验林开展的协作研究项目，该实验林由美国农业部林务局北部研究站运营维护。