Forest Inventory of a Calcium Amended Northern Hardwood Forest: Watershed 1, 2016, Hubbard Brook Experimental Forest

In order to evaluate the role of Ca supply in regulating the structure
and function of base-poor forest and aquatic ecosystems, the Ca
content of soil was increased through the application of wollastonite
(CaSiO3) in October 1999. Forest inventory surveys were initiated in
1996 and repeated at 5 year intervals. This data set includes 2016
inventory measurements. The data consists of a total inventory of all
trees >=10 cm diameter-at-breast-height (dbh) on the whole of the
watershed (11.8 ha), as measured in each of the 200 25 m x 25 m plots.
Trees >=2 to <=10 cm dbh were subsampled using a 3 meter wide
strip along one edge of each 25 m x 25 m plot. With the addition of
tree tags in 2006 on all trees >=10 cm dbh, tracking of individual
trees is now possible. 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.