USDA Forest Service
 

Adaptive Management Services

 
 

United States Department of Agriculture Forest Service, Enterprise

United States Department of Agriculture USDA Forest Service Enterprise - Reinvention Lab

Projects

Joint Fire Science / NASA Project

Project Summary

Design for Field Data Selection

The target variables to be measured for each plot included: 1) height to live crown, 2) crown height, 3) crown volume, and 4) crown bulk density. Vegetation structure, including crown characteristics, were measured in fixed-area plots, 1.0 ha in size. A GPS apparatus with sub-meter accuracy was used to locate each plot center and the precise location was recorded for each plot.

The 1.0 ha plot was laid out in nested, circular plots, the inner ring measuring 15 m in all directions from the plot center. The outer ring spans from 15 m to 56.4 m from the plot center (see Fig 1.). Tree density, dbh and species were recorded. The following variables were measured and recorded from both the inner and outer rings: 1) tree species for live trees; 2) snag decay class; 3) tree density and dbh; and 4) total tree height (to nearest 0.01 m measured with an Impulse 200 laser measuring device), see Fig. 2, label A.

In addition, the following variables were measured and recorded from the 15 m inner circle: 1) dbh ( to nearest 0.1 cm measured with a Spencer logging tape) for live trees > 10 cm dbh; 2) dbh (nearest 0.1 cm measured with a Spencer logging tape) for snags > 10 cm dbh and > 2 m in height; 3) height to live crown and height to full canopy (to nearest 0.01 m measured with an Impulse 200 laser measuring device), see Fig. 2, labels B and C; 4) crown form (distinguished into 4 categories: cone, cylinder, truncated ellipse, and umbrella); 5) crown diameter measured in four directions (upslope, downslope, across slope positive and negative) from the trunk (to nearest 0.1 m measured with a Spencer logging tape), see Fig. 2, label D; 6) canopy cover for trees >2 m tall measured using a moosehorn apparatus at 13 locations within each plot including: plot center, 0m, 5m, and 15m from plot center in four directions (upslope, downslope, across slope positive and negative), all measurements were taken facing out from the plot center (North, 2000); 7) shrub cover measured utilizing the line intercept method along four 15 m transects radiating from the plot center towards the upslope, downslope, and across slope positive and negative (to nearest 0.1 dm for 2 size classes: a) < 10 cm dbh and < 1 m tall, and b) < 10 cm dbh and >1 m tall); and 8) log cover measured utilizing the line intercept method along four 15 m transects radiating from the plot center towards the upslope, downslope, and across slope positive and negative (to nearest 0.1 dm for logs > 10 cm dbh and > 2 m long). The following additional variable will be measured and recorded from the 56. 4 m outer circle: 1) dbh (nearest 0.01 m) for live trees > 76 cm dbh and snags > 50 cm dbh and > 3 m in height.

 

PROJECT INFO
Project Summary
  Background
  Methods
  Design
  Deliverables
Progress to Date
Planned Work
JFS/NASA Investigators
Study Area Map [ PDF ]
Project [ PDF ]

 

USDA Forest Service - Adaptive Management Services Enterprise Unit
Last Modified: Monday, 16 December 2013 at 14:19:00 CST