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Browsing by Author "Witkowski, ETF"

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Biomass increases go under cover: woody vegetation dynamics in South African rangelands

Author: Mograbi, PJ ; Erasmus, BFN ; Witkowski, ETF ; Asner, GP ; Wessels, Konrad J ; Mathieu, Renaud SA ; Knapp, DE ; Martin, RE ; Mathieu, Renaud SA Date: May 2015 Woody biomass dynamics are an expression of ecosystem function, yet biomass estimates do not provide information on the spatial distribution of woody vegetation within the vertical vegetation subcanopy. We demonstrate the ability of airborne ... Read more
Human-modified landscapes: patterns of fine-scale woody vegetation structure in communal savannah rangelands

Author: Fisher, T ; Witkowski, ETF ; Erasmus, BFN ; Van Aardt, J ; Asner, GP ; Wessels, Konrad J ; Mathieu, Renaud SA Date: Nov 2011 Despite electrification, over 90% of rural households in certain areas of South Africa continue to depend on fuelwood, and this affects woody vegetation structure, with associated cascading effects on biodiversity within adjacent lands. To ... Read more
Humans and elephants as treefall drivers in African savannas

Author: Mograbi, PJ ; Asner, GP ; Witkowski, ETF ; Erasmus, BFN ; Wessels, Konrad J ; Mathieu, Renaud SA ; Vaughn, NR Date: Jan 2017 Humans have played a major role in altering savanna structure and function, and growing land-use pressure will only increase their influence on woody cover. Yet humans are often overlooked as ecological components. Both humans and the African ... Read more
Land cover change in the Kruger to Canyons Biosphere Reserve (1993-2006): a first step towards a conservation plan for the subregion

Author: Coetzer, KL ; Erasmus, BFN ; Witkowski, ETF ; Bachoo, AK Date: Jul 2010 This paper is a first step towards a conservation plan for the Kruger to Canyons Biosphere Reserve (K2C) on the South African Central Lowveld, quantifying the historical land-cover trends (1993-2006). During the analysis period, 36% of the ... Read more
Savanna woody vegetation classification – now in 3-D

Author: Fisher, JT ; Erasmus, BFN ; Witkowski, ETF ; Van Aardt, J ; Wessels, Konrad J ; Asner, GP Date: May 2013 The co-existence of woody plants and grasses characterize savannas, with the horizontal and vertical spatial arrangement of trees creating a heterogeneous biotic environment. To understand the influence of biogeophysical drivers on the spatial ... Read more

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Browsing by Author "Witkowski, ETF"

Browsing by Author "Witkowski, ETF"

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