Author:Cho, Moses A; Naidoo, Laven; Mathieu, Renaud SA; Asner, GP; Ramoelo, AbelDate:Nov 2012Several classification techniques have been used to map vegetation communities or land cover types using remote sensing data including maximum likelihood (ML), discriminant analysis and spectral angle mapper classifiers. ML classifier is a ...Read more
Author:House, JI; Archer, S; Breshears, DD; Scholes, RJDate:Nov 2003The article aims to identify approaches to improve our understanding of, and predictive capability for, mixed tree-grass systems. Elucidation of the interactions, dynamics and determinants, and identification of robust generalizations that ...Read more
Author:Whitecross, MA; Archibald, S; Witkowski, EFTDate:Nov 2012Frost disturbance is often mentioned in southern African savanna literature, but it is seldom discussed or investigated further. However, it can represent an above-ground disturbance as effective as fire or browsing, depending on the resistance ...Read more
Author:Ramoelo, Abel; Cho, Moses A; Mathieu, Renaud SA; Skidmore, AK; Schlerf, M; Heitkönig, IMADate:Oct 2012Grass quality and quantity information plays a crucial role in understanding the distribution, densities and population dynamics of herbivores (i.e. livestock and wildlife). Leaf nitrogen (N) and biomass (g/ m2) are indicators of grass quality ...Read more
Author:Archibald, S; Staver, C; Levin, SADate:Jan 2012Human ability to manipulate fire and the landscape has increased over evolutionary time, but the impact of this on fire regimes and consequences for biodiversity and biogeochemistry are hotly debated. Reconstructing historical changes in ...Read more
Author:Staver, C; Archibald, S; Levin, SADate:Oct 2011Theoretically, fire–tree cover feedbacks can maintain savanna and forest as alternative stable states. However, the global extent of fire- driven discontinuities in tree cover is unknown, especially accounting for seasonality and soils. The ...Read more
Author:Lück-Vogel, Melanie; Strohbach, MDate:Jul 2009Detection and quantification of degradation processes as a first step for understanding and development of prevention and mitigation actions is of international interest as the described processes are observed in semi-arid landscapes globally. ...Read more
Author:Huntley, BJDate:Mar 1978A description of the objectives, organization and research programme of the Savanna Ecosystem Project being undertaken at Nylsvley in the northern Transvaal is presented. The project is a cooperative multi-disciplinary study of the structure ...Read more
Author:Shackleton, CMDate:Mar 1999Woody community phenology was studied in the central lowveld, South Africa, over a twelve month period at three sites along a rainfall gradient, with both toplands and bottomlands sampled at each site. Each month, individual plants, in ...Read more
Author:Getz, WA; Starfield, AMDate:Dec 1975The construction of a linear compartmental model of the savanna ecosystem at Nylsvley is discussed. Using crude estimates for the standing crop of the compartments and intercompartmental flow rates the sensitivity of the model to changes in ...Read more
Author:Munyati, C; Shaker, P; Phasha, MGDate:May 2011Healthy rangelands are of economic and biodiversity conservation importance in the savannas of northern South Africa. The proliferation of woody plant species on the rangelands, known as bush encroachment, constitutes a degradation of rangeland ...Read more
Author:Privette, JL; Tian, Y; Roberts, G; Scholes, RJ; Wang, Y; Caylor, KK; Frost, P; Mukelabai, MDate:Mar 2004The Kalahari Transect is one of several International Geosphere-Biosphere Programme (IGBP) transects designed to address global change questions at the regional scale, in particular by exploiting natural parameter gradients ( Koch et al., ...Read more