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

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dc.contributor.author Fisher, J
dc.contributor.author Erasmus, BFN
dc.contributor.author Witkowski, E
dc.contributor.author Van Aardt, J
dc.contributor.author Asner, G
dc.contributor.author Kennedy-Bowdoin, TY
dc.contributor.author Knapp, D
dc.contributor.author Mathieu, Renaud SA
dc.contributor.author Wessels, Konrad J
dc.date.accessioned 2010-04-18T13:50:07Z
dc.date.available 2010-04-18T13:50:07Z
dc.date.issued 2009-07
dc.identifier.citation Fisher, 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 198-201 en
dc.identifier.isbn 978-1-4244-3395-7
dc.identifier.uri http://hdl.handle.net/10204/4045
dc.description Copyright: 2009 IEEE, International Geoscience and Remote Sensing Symposium (IGARSS), Cape Town, South Africa, 12-17 July 2009 en
dc.description.abstract 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. en
dc.language.iso en en
dc.publisher IEEE en
dc.subject Woody vegetation en
dc.subject Land use en
dc.subject Semi arid savanna en
dc.subject Carnegie airborne observatory en
dc.subject LiDAR en
dc.subject Vegetation density en
dc.subject 3-D vegetation profile en
dc.subject Rangelands en
dc.title Three-dimensional woody vegetation structure across different land-use types and land-use intensities in a semi-arid savanna en
dc.type Conference Presentation en
dc.identifier.apacitation Fisher, 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/10204/4045 en_ZA
dc.identifier.chicagocitation Fisher, 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/10204/4045 en_ZA
dc.identifier.vancouvercitation Fisher 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 . en_ZA
dc.identifier.ris 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 - en_ZA


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