The improvement of precision for estimating the abundance of standing dead trees using auxiliary information under the FIA pot design

Hong Su An; David W. MacFarlane; Christopher W. W. Woodall

Treesearch

The improvement of precision for estimating the abundance of standing dead trees using auxiliary information under the FIA pot design

Informally Refereed

Authors:

Hong Su An, David W. MacFarlane, Christopher W. W. Woodall

Year:

2012

Type:

Paper

Station:

Northern Research Station

Source:

In: Morin, Randall S.; Liknes, Greg C., comps. Moving from status to trends: Forest Inventory and Analysis (FIA) symposium 2012; 2012 December 4-6; Baltimore, MD. Gen. Tech. Rep. NRS-P-105. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. [CD-ROM]: 338-341.

Download (PDF 135 KB)

Download (PDF 135 KB): https://research.fs.usda.gov/download/treesearch/42773.pdf

Abstract

Standing dead trees are an important component of forest ecosystems. However, reliable estimates of standing dead tree population parameters can be difficult to obtain due to their low abundance and spatial and temporal variation. After 1999, the Forest Inventory and Analysis (FIA) Program began collecting data for standing dead trees at the Phase 2 stage of sampling. However, the estimates have relatively large variations compared to the estimates of live trees. The results represent that EZ-Hurdle method shows better precision than the FIA method for both spatial patterns and densities of standing dead trees.

Parent Publication

Moving from status to trends: Forest Inventory and Analysis (FIA) symposium 2012

Keywords

statistics, estimation, sampling, modeling, remote sensing, forest health, data integrity, environmental monitoring, cover estimation, international forest monitoring

Citation

An, Hong Su; MacFarlane, David W.; Woodall, Christopher W. 2012. The improvement of precision for estimating the abundance of standing dead trees using auxiliary information under the FIA pot design. In: Morin, Randall S.; Liknes, Greg C., comps. Moving from status to trends: Forest Inventory and Analysis (FIA) symposium 2012; 2012 December 4-6; Baltimore, MD. Gen. Tech. Rep. NRS-P-105. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. [CD-ROM]: 338-341.