TY - GEN
T1 - Suitability of the perpendicular vegetation (PD54) index in the areas in which biological soil crusts are common
AU - Ghorbam, Ardavan
AU - Bruce, David
PY - 2011
Y1 - 2011
N2 - Biological Soil Crusts (BSC) are distributed across three quarters of Australian's land. Previous remotely-sensed studies, which were applied to areas in which BSC occur, either neglected BSC all together or considered BSC species in one group and did this when they were in a dry state. Previous studies have reported that there is a considerable similarity between the spectra of BSC and dry bare soil thus leading to potential misinterpretation. The Perpendicular Vegetation Index (commonly called PD54) was developed in the areas in which BSC were not common. However, some studies have employed this index in the areas in which BSC are common. This study utilized ground-level spectral measurements to synthesize Landsat Thematic Mapper (TM) imagery and examined the BSC effects on this index. Results showed that neither individual BSC with background soil, nor 'BSC pattern spectra' affect the vegetation and soil lines. This applies when the percentage cover of BSC varies from 1.69% to 36.99%. Thus, the use of PD54 in the application of grazing gradient analysis can be misleading as the results are insensitive to BSC presence.
AB - Biological Soil Crusts (BSC) are distributed across three quarters of Australian's land. Previous remotely-sensed studies, which were applied to areas in which BSC occur, either neglected BSC all together or considered BSC species in one group and did this when they were in a dry state. Previous studies have reported that there is a considerable similarity between the spectra of BSC and dry bare soil thus leading to potential misinterpretation. The Perpendicular Vegetation Index (commonly called PD54) was developed in the areas in which BSC were not common. However, some studies have employed this index in the areas in which BSC are common. This study utilized ground-level spectral measurements to synthesize Landsat Thematic Mapper (TM) imagery and examined the BSC effects on this index. Results showed that neither individual BSC with background soil, nor 'BSC pattern spectra' affect the vegetation and soil lines. This applies when the percentage cover of BSC varies from 1.69% to 36.99%. Thus, the use of PD54 in the application of grazing gradient analysis can be misleading as the results are insensitive to BSC presence.
KW - Indices
KW - Land cover change
KW - Rangeland monitoring
UR - http://www.scopus.com/inward/record.url?scp=84865689787&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84865689787
SN - 9781618394972
T3 - 32nd Asian Conference on Remote Sensing 2011, ACRS 2011
SP - 1879
EP - 1883
BT - 32nd Asian Conference on Remote Sensing 2011, ACRS 2011
PB - Curran Associates Inc
CY - New York
T2 - 32nd Asian Conference on Remote Sensing 2011, ACRS 2011
Y2 - 3 October 2011 through 7 October 2011
ER -