Three-dimensional woody vegetation structure across different land-use types and land-use intensities in a semi-arid savanna

Fisher, JErasmus, BFNWitkowski, EVan Aardt, JAsner, GKennedy-Bowdoin, TYKnapp, DMathieu, Renaud SAWessels, Konrad J2010-04-182010-04-182009-07Fisher, J, Erasmus, BFN, Witkowski, Ed et al 2009. Three-dimensional woody vegetation structure across different land-use types and land-use intensities in a semi-arid savanna. IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Cape Town, South Africa, 12-17 July 2009, pp 198-201978-1-4244-3395-7http://hdl.handle.net/10204/4045Copyright: 2009 IEEE, International Geoscience and Remote Sensing Symposium (IGARSS), Cape Town, South Africa, 12-17 July 2009Factors influencing woody savanna vegetation structure across a land-use gradient of intensity (highly and lightly utilized communal rangeland) and type (national protected area, private game reserve and communal rangelands) were investigated. Small footprint discrete return LiDAR data (1.12 m point spacing) from the Carnegie Airborne Observatory (CAO) ‘Alpha system’ were used to measure three-dimensional vegetation structure across the different treatments. A volumetric pixel (voxel) approach was used to characterise the vertical distribution of LiDAR returns, that is, vegetation density, in one metre increments for comparison using descriptive statistics across the land-use type and intensity gradient. Vegetation structure in the national protected area was most similar to the lightly utilized rangelands, and the private game reserve was most similar to the highly utilized rangelands with low levels of structural diversity present. Current trends in structural diversity can be related to harvesting, regeneration, herbivory and fire.enWoody vegetationLand useSemi arid savannaCarnegie airborne observatoryLiDARVegetation density3-D vegetation profileRangelandsThree-dimensional woody vegetation structure across different land-use types and land-use intensities in a semi-arid savannaConference PresentationFisher, J., Erasmus, B., Witkowski, E., Van Aardt, J., Asner, G., Kennedy-Bowdoin, T., ... Wessels, K. J. (2009). Three-dimensional woody vegetation structure across different land-use types and land-use intensities in a semi-arid savanna. IEEE. http://hdl.handle.net/10204/4045Fisher, J, BFN Erasmus, E Witkowski, J Van Aardt, G Asner, TY Kennedy-Bowdoin, D Knapp, Renaud SA Mathieu, and Konrad J Wessels. "Three-dimensional woody vegetation structure across different land-use types and land-use intensities in a semi-arid savanna." (2009): http://hdl.handle.net/10204/4045Fisher J, Erasmus B, Witkowski E, Van Aardt J, Asner G, Kennedy-Bowdoin T, et al, Three-dimensional woody vegetation structure across different land-use types and land-use intensities in a semi-arid savanna; IEEE; 2009. http://hdl.handle.net/10204/4045 .TY - Conference Presentation AU - Fisher, J AU - Erasmus, BFN AU - Witkowski, E AU - Van Aardt, J AU - Asner, G AU - Kennedy-Bowdoin, TY AU - Knapp, D AU - Mathieu, Renaud SA AU - Wessels, Konrad J AB - Factors influencing woody savanna vegetation structure across a land-use gradient of intensity (highly and lightly utilized communal rangeland) and type (national protected area, private game reserve and communal rangelands) were investigated. Small footprint discrete return LiDAR data (1.12 m point spacing) from the Carnegie Airborne Observatory (CAO) ‘Alpha system’ were used to measure three-dimensional vegetation structure across the different treatments. A volumetric pixel (voxel) approach was used to characterise the vertical distribution of LiDAR returns, that is, vegetation density, in one metre increments for comparison using descriptive statistics across the land-use type and intensity gradient. Vegetation structure in the national protected area was most similar to the lightly utilized rangelands, and the private game reserve was most similar to the highly utilized rangelands with low levels of structural diversity present. Current trends in structural diversity can be related to harvesting, regeneration, herbivory and fire. DA - 2009-07 DB - ResearchSpace DP - CSIR KW - Woody vegetation KW - Land use KW - Semi arid savanna KW - Carnegie airborne observatory KW - LiDAR KW - Vegetation density KW - 3-D vegetation profile KW - Rangelands LK - https://researchspace.csir.co.za PY - 2009 SM - 978-1-4244-3395-7 T1 - Three-dimensional woody vegetation structure across different land-use types and land-use intensities in a semi-arid savanna TI - Three-dimensional woody vegetation structure across different land-use types and land-use intensities in a semi-arid savanna UR - http://hdl.handle.net/10204/4045 ER -