Browsing by Author "13077767 - Cilliers, Dirk Petrus"
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An administrative justice perspective on improving EIA effectiveness
Retief, Francois P.; Fischer, Thomas B.; Alberts, Reece C.; Roos, Claudine; Cilliers, Dirk P. (Taylor & Francis, 2020)The aim of this letter is to provide an administrative justice perspective on EIA effectiveness. EIA is described as essentially an administrative instrument, reflecting a number of principles that revolve around an ... -
Assessing the likelihood of gene flow from sugarcane (Saccharum Hybrids) to wild relatives in South Africa
Snyman, Sandy J.; Komape, Dennis M.; Khanyi, Hlobisile; Van den Berg, Johnnie; Cilliers, Dirk; Barnard, Sandra; Siebert, Stefan J. (Frontiers Media, 2018)Pre-commercialization studies on environmental biosafety of genetically modified (GM) crops are necessary to evaluate the potential for sexual hybridization with related plant species that occur in the release area. The ... -
Considering flood risk in spatial development planning: a land use conflict analysis approach
Cilliers, Dirk P. (OASIS, 2019)Flooding is the predominant natural hazard observed in Africa, and it often leads to damage to property and losses in human lives. To ensure that the detrimental effects of flooding are kept to a minimum, flood-prone areas ... -
Considering flood risk in spatial development planning: a land use conflict analysis approach
Cilliers, Dirk P. (AOSIS, 2019)Flooding is the predominant natural hazard observed in Africa, and it often leads to damage to property and losses in human lives. To ensure that the detrimental effects of flooding are kept to a minimum, flood-prone areas ... -
Current distribution and population size of the Blue Swallow Hirundo atrocaerulea in the southern Tanzanian highlands
Evans, Steven W.; Cilliers, Dirk; Baker, Elizabeth M.; Baker, Neil E. (Taylor & Francis, 2016)Two surveys of Blue Swallows were conducted in the southern Tanzanian highland grasslands in order to determine the habitat preferences and estimate the size of this subpopulation. During the 2008/09 and 2012 surveys, a ... -
Developing a site selection tool to assist reintroduction efforts for the Southern Ground– Hornbill Bucorvus leadbeateri
Cilliers, Dirk; Evans, Steven; Coetzee, Hendri; Van Rensburg, Leon; (Taylor & Francis. Co-published by NISC., 2013)The Southern Ground-Hornbill BucolVus leadbeateri (SGH) is regarded as Vulnerable globally and Endangered in South Africa as a result of losing close to 70% of its range and 50% of its historic population in the country. One ... -
Environmental management frameworks: results and inferences of report quality performance in South Africa
Marais, M.; Retief, F.P.; Sandham, L.A.; Cilliers, D.P. (Taylor & Francis, 2015)Environmental management frameworks (EMFs) were developed in South Africa as strategic environmental management instruments to map environmental sensitivity in order to aid the screening out of undesired developments and ... -
The extent and status of environmental management frameworks (EMFs) in South Africa, 2006-2015
Cilliers, Dirk Petrus; Retief, Francois (Taylor & Francis, 2017)An environmental management framework (EMF) is a uniquely South African environmental management tool legislated since 2006. Although the tool has been widely applied there has been no empirical research on the overall ... -
Floristic analysis of semi-arid mountain ecosystems of the Griqualand West centre of plant endemism, Northern Cape, South Africa
Van Staden, Nanette; Siebert, Stefan John; Cilliers, Dirk Petrus; Wilsenach, Dian; Frisby, Arnold Walter (Society for Indonesian Biodiversity, 2020)The Griqualand West Centre (GWC) is one of 13 centres of plant endemism in South Africa. Despite its unique flora, it remains poorly conserved and studied. A recent study identified an extensive geographical core area for ... -
Land-use suitability modelling as an input for spatial planning in Tlokwe local municipality, North-West province, South Africa
Cilliers, Dirk Petrus; Drewes, Johannes Ernst (Department of Urban and Regional Planning, University of the Free State, Bloemfontein, South Africa, 2010) -
Measurements of biogenic volatile organic compounds at a grazed savannah grassland agricultural landscape in South Africa
Jaars, Kerneels; Van Zyl, Pieter G.; Beukes, Johan P.; Josipovic, Micky; Venter, Andrew D.; Knoetze, Leandra; Cilliers, Dirk P.; Siebert, Stefan J.; Laakso, Lauri (EGU, 2016)Biogenic volatile organic compounds (BVOCs) play an important role in the chemistry of the troposphere, especially in the formation of tropospheric ozone (O3) and secondary organic aerosols (SOA). Ecosystems produce and ... -
The perceived benefits of EIA for government: a regulator perspective
Cilliers, D.P.; Van Staden, I.; Roos, C.; Alberts, R.C.; Retief, F.P. (Taylor & Francis, 2020)With increased political polarisation and the emergence of populist governments around the world – many of which erode regulatory requirements such as EIA – there is an urgent need to be able to identify and explain the ... -
Plant endemism in Griqualand West, South Africa
Frisby, A.W.; Siebert, S.J.; Struwig, M.; Cilliers, D.P. (Elsevier, 2019)Griqualand West, a region in the semi-arid Northern Cape and North-West provinces of South Africa, has been variously suggested to contain a number of range-restricted plant species, and was proposed to be a local centre ... -
The potential for domestic thermal insulation retrofits on the South African Highveld
Matandirotya, Newton R.; Cilliers, Dirk P.; Burger, Roelof P.; Language, Brigitte; Piketh, Stuart J. (NACA, 2019)The South African Highveld is a portion on the inland plateau characterized by low winter ambient temperatures. Studies done in several climatic regions around the world have found a positive relationship between inadequate ... -
Re-thinking the fundamentals of EIA through the identification of key assumptions for evaluation
Alberts, R.C.; Retief, F.P.; Roos, C.; Cilliers, D.P.; Arakele, M. (Taylor & Francis, 2019)EIA is increasingly being questioned as a decision-making instrument of choice for decision makers. In addressing these concerns, the paper aims to re-think the fundamentals of EIA through the identification of key assumptions ... -
Reflecting on GIS–related research in South Africa: 1980-2012
Cilliers, D.P.; De Klerk, T.C.; Sandham, L.A. (Taylor & Francis, 2013)Since the early 1980s, geographic information systems (GIS) have increasingly been applied in research or used to support research in South Africa. The nature and extent of such research has not been investigated, and ... -
Regulators' perceptions of environmental impact assessment (EIA) benefits in a sustainable development context
Roos, C.; Cilliers, D.P.; Retief, F.P.; Alberts, R.C.; Bond, A.J. (Elsevier, 2020)The costs of conducting Environmental Impact Assessment (EIA) are well known. Yet the benefits of EIA are much more intangible, leading to a situation where some question its value as the tool of choice for informing ... -
Spatial assessment of amphibian chytrid fungus (Batrachochytrium dendrobatidis) in South Africa confirms endemic and widespread infection
Tarrant, Jeanne; Cilliers, Dirk; Du Preez, Louis H; Weldon, Ché (Public Library of Science, 2013)Chytridiomycosis has been identified as a major cause of global amphibian declines. Despite widespread evidence of Batrachochytrium dendrobatidis infection in South African frogs, sampling for this disease has not focused ... -
Urban ecology: policy issues resolved and unresolved
Cilliers, S.S.; Drewes, J.E.; Du Toit, M.J.; Cilliers, D.P. (Edward Elgar Publishing, 2011)Our contemporary world is an urban world (Pacione, 2005). In 2008 the proportion of people living in urban areas equalled their rural counterparts and it is expected that 70 per cent of the world population will inhabit ...