Forest Inventory of a Northern Hardwood Forest: Watershed 6 1987, Hubbard Brook Experimental Forest

Forest inventory surveys were initiated in 1965,
repeated in 1977, and repeated at 5 year intervals after
that; this data set was collected in summer of 1987. The
inventory consists of a total inventory of all trees >=10
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. Trees >=2 to <=10 cm dbh were inventoried
on 35 of the 25 m x 25 m plot. 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年开展首次重复清查，此后每5年重复一次；本次数据集采集于1987年夏季。本次清查覆盖整个流域（13.23公顷）内所有胸径（diameter-at-breast-height, dbh）≥10厘米的林木，在208个25米×25米样地中逐一完成测量。胸径介于2至10厘米的林木仅在其中35个25米×25米样地中开展清查。本数据集作为哈伯德布鲁克生态系统研究（Hubbard Brook Ecosystem Study, HBES）的一部分采集所得。该研究是在哈伯德布鲁克实验林开展的协作项目，由美国农业部林务局（USDA Forest Service）北部研究站运营维护。