Penobscot Experimental Forest boundary, roads, trails, management units, and permanent sample plot locations: 2nd edition

This data publication contains shapefiles for the boundary, roads, trails, management units, and permanent sample plot locations on the Penobscot Experimental Forest (PEF) in Bradley and Eddington, Maine, USA. Also contained within this publication are the locations of the following long-term United States Department of Agriculture (USDA) Forest Service experiments on the PEF: Compartment Management Study (CMS; Silviculture Effects on Composition, Structure, and Growth), Management Intensity Demonstration (MID), Auxiliary Selection Cutting Study (ASCS), Provenance Planting Study (PROVENANCE), Beech Bark Disease Monitoring Study (BEECH), Logging Methods Study (LOGGING), Biomass Harvesting and Prescribed Burning Study (BIOMASS), Northern White-Cedar Silviculture Study (CEDAR), Cutover Mixedwood Stands Study (REHAB), and the Precommercial Thinning x Fertilization Study (STUDY 58). University of Maine management units and permanent sample plot locations on the PEF are not included in this publication.
These data can be used for mapping or spatial analysis of vegetation and site data collected in long-term experiments at the Penobscot Experimental Forest.
This data publication is a second edition. The first edition was published in 2014 (Rogers et al. 2014; https://doi.org/10.2737/RDS-2014-0008). This second edition, published on 06/25/2020, includes an update to the original shapefiles provided in the first edition with some corrections and modifications to maintain consistency across the files. An additional shapefile is included that provides the location of other long-term USDA Forest Service experiments on the PEF. Original metadata date was 06/18/2020. On 07/13/2020 the PEF_PlotLocations_May2020 shapefile was edited as follows: locations of inactive permanent sample plots in MU 21 were added, the attributes Radius_FT, Radius_M, and Intensive were added to provide information about permanent sample plot characteristics in all MUs, and some data were converted from numeric to text. The PEF_MUs_June2020 shapefile was also edited, with two out areas added in MU 3 and acres and hectares recalculated for that MU. Finally, new versions of the supplemental files FullPEF and Database Changes were provided to include the revisions described above. The metadata was updated to reflect these changes.