Dataset: Compiled Pisgah State Park Timber Cruise Data 2007 to 2018

Methods

The methods followed in the creation of the dataset, including description of field, laboratory and processing steps, and quality control procedures

Current Methods

• Carbon Storage in Managed Areas of the Park
  
  

  analyzed data collected by NHDFL on timber cruises within demarcated Criteria 2 and 3 stands of the PSP designated for active management (NHDFL 2021a). NHDFL collected large basal area factor cruise data with an 80factor prism and recorded diameter at breast height (1.47m, DBH), species, number of sawlogs and a product rating for each tally tree within the variable-radius plot. There are 10 compartments comprised of 162 stands with 3,999 points where data was collected. Without height measurements, we could not use more recent carbon estimation equations such as the component ratio method (Woodall et al. 2011), so we used equations developed by Jenkins et al. (2003) combined with species-specific coefficients β¬0 and β¬1 provided by FIA (Burrill et al. 2018) to compute megagrams of carbon per acre from diameter and species for each tree using the following equation: Carbon = exp(β¬0 + β¬1* ln(DBH*2.54)) * 2.2046 These tree-level estimates were then scaled to the stand, compartment and managed areas based on the number of survey points to produce total estimates at each scale.

Dataset Fields

Detailed documentation of the fields comprising the dataset, including the type of measurement, units where applicable, and any controlled vocabularies or code lists present in the data

Sampling Equipment

Equipment and software used to collect data, including how that equipment was used.

Site Characteristics

The spatial extent of the dataset site coverage, and descriptions of the spatial extent and context for the data collection

• Site Description

  Pisgah State Park is a 13,361-acre public forest located in New Hampshire. The land has a network of roads and patches of old growth forest. The forests are heterogeneous and contain several forest types: eastern white pine, eastern hemlock, northern red oak, mixed upland hardwoods, sugar maple/beech/yellow birch forest and red maple/upland habitat. Forest criteria types: 1 – undisturbed/unmanaged (4,723 acres), 2 - uneven age management (3,677 acres), 3 - even aged management (4,961 acres)