Sensitivity of the thematic mapper enhanced wetness difference index to detect mountain pine beetle red-attack damage

Red-attack damage caused by mountain pine beetle (Dentroctonus ponderosa Hopkins) infestation in stands of lodgepole pine (Pinus contorta) in the Prince George Forest Region of British Columbia was examined using multitemporal Landsat-7 ETM+ imagery acquired in 1999, 2000, and 2001. The image data were geometrically and atmospherically corrected, and processed using the Tasseled Cap Transformation (TCT) to obtain wetness indices. The final steps included pixel subtraction, enhancement, and thresholding of the wetness index differences. The resulting enhanced wetness difference index (EWDI) was used to interpret spectral patterns in stands with confirmed (through aerial survey) red-attack damage in 2001, and these EWDI patterns were compared to the patterns of reflectance in normal-colour composites. We stratified the aerial survey dataset into two levels and used the EWDI to discriminate classes of 10–29 red-attack trees and 30–50 red-attack trees, and a sample of healthy forest collected from inventory data. Classification accuracy of red-attack damage based on the EWDI ranged from 67% to 78% correct.

[1]  W. Cohen,et al.  Estimating structural attributes of Douglas-fir/western hemlock forest stands from Landsat and SPOT imagery , 1992 .

[2]  W. Cohen,et al.  Estimating the age and structure of forests in a multi-ownership landscape of western Oregon, U.S.A. , 1995 .

[3]  Steven E. Franklin,et al.  Forest Structure Classification in the North Columbia Mountains Using the Landsat TM Tasseled Cap Wetness Component , 2001 .

[4]  R. Lunetta,et al.  Remote Sensing Change Detection: Environmental Monitoring Methods and Applications , 1999 .

[5]  Michael A. Wulder,et al.  Mountain Pine Beetle Red-Attack Forest Damage Classification Using Stratified Landsat TM Data in British Columbia, Canada , 2003 .

[6]  C. Lauver,et al.  A hierarchical classification of Landsat TM imagery to identify natural grassland areas and rare species habitat , 1993 .

[7]  L. Safranyik.  Management of Lodgepole Pine to Reduce Losses From The Mountain Pine Beetle , 2002 .

[8]  Powell,et al.  Model Analysis of Spatial Patterns in Mountain Pine Beetle Outbreaks. , 1998, Theoretical population biology.

[9]  D. Geiszler,et al.  Modeling the dynamics of mountain pine beetle aggregation in a lodgepole pine stand , 2004, Oecologia.

[10]  A. Berryman.  Theoretical Explanation of Mountain Pine Beetle Dynamics in Lodgepole Pine Forests , 1976 .

[11]  A. K. Milne,et al.  The use of remote sensing in mapping and monitoring vegetational change associated with bushfire events in Eastern Australia , 1986 .

[12]  F. J. Ahern,et al.  An Investigation of Spot HRV Data for Detecting Recent Mountain Pine Beetle Mortality , 1988 .

[13]  R. Kauth,et al.  The tasselled cap - A graphic description of the spectral-temporal development of agricultural crops as seen by Landsat , 1976 .

[14]  R. Richter.  A fast atmospheric correction algorithm applied to Landsat TM images , 1990 .

[15]  F. J. Ahern,et al.  Forestry information content of Thematic Mapper data , 1986 .

[16]  P. A. Murtha.  REMOTE SENSING AND VEGETATION DAMAGE: A THEORY FOR DETECTION AND ASSESSMENT , 1978 .

[17]  K. Price,et al.  Spectral retrogression and insect damage in lodgepole pine successional forests , 1998 .

[18]  P. G. Pilon,et al.  Operational forest inventory applications using Landsat TM data: The British Columbia experience , 1990 .

[19]  P. A. Murtha,et al.  PC-Based Digital Image Analysis for Mountain Pine Beetle Green Attack: Preliminary Results , 1987 .

[20]  E. Crist,et al.  Application of the Tasseled Cap concept to simulated thematic mapper data , 1984 .

[21]  Steven E. Franklin,et al.  Interpretation of Forest Harvest Conditions in New Brunswick Using Landsat TM Enhanced Wetness Difference Imagery (EWDI) , 2001 .

[22]  R. G. Mitchell,et al.  Analysis of spatial patterns of lodgepole pine attacked by outbreak populations of the mountain pine beetle , 1991 .

[23]  C. Woodcock,et al.  An assessment of several linear change detection techniques for mapping forest mortality using multitemporal landsat TM data , 1996 .

[24]  Mark W. Patterson,et al.  Mapping Fire-Induced Vegetation Mortality Using Landsat Thematic Mapper Data: A Comparison of Linear Transformation Techniques , 1998 .

[25]  L. Unger,et al.  Mountain Pine Beetle , 1993 .