TV080
Aboveground Live Biomass (2008), Andrews Experimental Forest

CREATOR(S): Thomas A. Spies

PRINCIPAL INVESTIGATOR(S): Thomas A. Spies

ORIGINATOR(S): Thomas A. Spies

OTHER RESEARCHER(S): Russell N. Faux

DISTRIBUTOR: Theresa J. Valentine

METHOD CONTACT: Keith A. Olsen

DATA SET CREDIT:

Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation’s Long-Term Ecological Research Program (DEB 08-23380), US Forest Service Pacific Northwest Research Station, and Oregon State University. LiDAR data was flown and processed by: Watershed Sciences 257B SW Madison Street Corvallis, OR 97333 215 SE 9th Ave, Suite 106 Portland, Oregon 97214 www.watershedsciences.com

MOST RECENT METADATA REVIEW DATE:

13 Mar 2015

KEYWORDS:

geology, geomorphology, ecology, biomass, geographic information systems, LiDAR, modeling, landscape change, vascular plants, vegetation, landscape dynamics

PURPOSE:

Live biomass is a forest metric derived from Lidar point clouds. This metric provides maps and images of aboveground live biomass for the HJ Andrews Experimental Forest. Live biomass can give a sense of how much vegetation exists on the landscape.

METHODS:

Processing Procedures - TV080:

Description: Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation’s Long-Term Ecological Research Program (DEB 08-23380), US Forest Service Pacific Northwest Research Station, and Oregon State University. LiDAR data was flown and processed by: Watershed Sciences 257B SW Madison Street Corvallis, OR 97333 215 SE 9th Ave, Suite 106 Portland, Oregon 97214 www.watershedsciences.com Processing for creating biomass from the bare earth DEM and height metrics from the point cloud. ArcGIS 10.1 toolbox commands: RasterCalculator Power((0.1870714 + 0.02105491 * "ht5f_p95c" + 0.0001975951 * "hja_be_5m" + 0.0001773864 * Square("ht5f95_7x7sd")), 3) \\abies\forshare\Groups\HJA_Lidar\keith.olsen\biomass_mar2012\biomass25sm RasterCalculator ""biomass25sm" * 400" \\abies\forshare\Groups\HJA_Lidar\keith.olsen\biomass_mar2012\biomass_mgPha CI = confidence interval. 1. The model assumes a linear combination of parameters with the cube root of aboveground live biomass (Mg) at 25 m2 cells as response variable. Aboveground live carbon was derived by assuming a C content of 50%. 2. Derived from 100,000 iterations of a nonparametric boostrap in which groups of spatially dependent observations were resampled with replacement. 3. 95th percentile Lidar return height. 4. Variance in H95 across a 35 m 9 35 m area centered on the focal 5 m cell.

Citation: The biomass raster was developed by equations in (Seidl, et al 2012). Lidar variables used to create the raster include 95th percentile height, bare earth elevation, and the standard deviation of height in a 35m moving window.

TAXONOMIC SYSTEM:

None

GEOGRAPHIC EXTENT:

HJ Andrews Experimental Forest, western Cascades, Oregon, USA.

MEASUREMENT FREQUENCY:

when funds are available.

PROGRESS DESCRIPTION:

Complete

UPDATE FREQUENCY DESCRIPTION:

notPlanned

CURRENTNESS REFERENCE:

Ground condition

RELATED MATERIAL:

Lidar dataset: study code GI010