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Browsing by Author "Van Wilgen, BW"

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Perspective: The challenge of ecologically sustainable water management

Author: Bernhardt, E ; Bunn, SE ; Hart, DD ; Malmqvist, B ; Naiman, RJ ; Pringle, C ; Reuss, M ; Van Wilgen, BW ; Muotka, T Date: Oct 2006 Sustainable water resource management is constrained by three pervasive myths; that societal and environmental water demands always compete with one another; that technological solutions can solve all water resource management problems; and ... Read more
Preliminary assessment of the impacts of invasive alien plants on ecosystem services in South Africa

Author: Van Wilgen, BW ; Le Maitre, David C ; Reyers, B ; Schonegevel, L ; Richardson, DM Date: 2006 Despite significant advances in the science of invasion ecology, surprisingly little is known about the magnitude of the impacts of invasions. The work described in this paper aims to develop spatially explicit databases of both ecosystem ... Read more
The prioritisation of invasive alien plant control projects using a multi-criteria decision model informed by stakeholder input and spatial data

Author: Forsyth, GG ; Le Maitre, David C ; O'Farrell, Patrick J ; Van Wilgen, BW Date: Jul 2012 Invasions by alien plants are a significant threat to the biodiversity and functioning of ecosystems and the services they provide. The South African Working for Water program was established to address this problem. It needs to formulate ... Read more
Proposed classification of invasive alien plant species in South Africa: towards prioritizing species and areas for management action

Author: Nel, JL ; Richardson, DM ; Rouget, M ; Mgidi, TN ; Mdzeke, N ; Le Maitre, David C ; Van Wilgen, BW ; Schonegevel, L ; Henderson, L ; Neser, S Date: Jan 2004 Many invasive alien plant species in South Africa are already well-established and cause substantial damage, while scores of others are at the early stages of invasion (only recently introduced and/or entering a phase of rapid population ... Read more
Prospects for the biological control of invasive Pinus species (Pinaceae) in South Africa

Author: Hoffmann, JH ; Moran, VC ; Van Wilgen, BW Date: Sep 2011 Nine Pinus species (Pinaceae) have become invasive plants in South Africa after being deliberately introduced and cultivated in commercial forests, for timber. A proposal to use biological control to contain the problem raised concerns among ... Read more
Proteaceae juvenile periods and post-fire recruitment as indicators of minimum fire return interval in eastern coastal fynbos

Author: Kraaij, T ; Cowling, RM ; Van Wilgen, BW ; Schutte-Vlok, A Date: May 2012 Fire management practices aimed at biodiversity conservation are often in conflict with hazard reduction requirements. Particularly in protected areas where such conflict of interest exists, the question is asked: what are the ecological ... Read more
Rapid assessment of the invasive status of eucalyptus species in two South African provinces

Author: Forsyth, GG ; Richardson, DM ; Brown, PJ ; Van Wilgen, BW Date: Jan 2004 Gum trees, or eucalypts (Eucalyptus species), have been targeted for invasive alien plant clearing programmes in many parts of South Africa. This has caused some dissatisfaction where the species concerned also have useful characteristics, ... Read more
Recent fire history of the Table Mountain National Park and implications for fire management

Author: Forsyth, GG ; Van Wilgen, BW Date: 2008 This paper provides an assessment of fire regimes in the Table Mountain National Park over the past four decades. The authors compiled a GIS database of all fires between 1970 and 2007 and analysed the fire regime in terms of the frequency, ... Read more
Recovery of South African fynbos vegetation following alien woody plant clearing and fire: implications for restoration

Author: Holmes, PM ; Richardson, DM ; Van Wilgen, BW ; Gelderblom, C Date: Dec 2000 The recovery of fynbos vegetation after invasion by dense stands of alien trees, and clearing by either 'burn standing’,’ fell and burn', or 'fell, remove and burn' treatments, was investigated in two watersheds in the Western Cape Province, ... Read more
Research projects and capacity building

Author: Breen, CM ; Jaganyi, JJ ; Van Wilgen, BW ; Van Wyk, E Date: Oct 2004 A World Bank long-term perspective study on Sub-Saharan Africa highlighted the need to build human and institutional capacity in virtually all sectors and countries. In South Africa, establishment of a democratic government in 1994 saw increased ... Read more
Science councils in South Africa

Author: Scholes, RJ ; Anderson, F ; Kenyon, C ; Napier, J ; Ngoepe, P ; Van Wilgen, BW ; Weaver, A Date: Nov 2008 The CSIR celebrated its 60th anniversary in 2006 by taking a long, hard look at its continuing role in South Africa. This paper was written by the CSIR Fellows, at the invitation of the Department of Science and Technology, to capture some ... Read more
Scientific challenges in the field of invasive alien plant management

Author: Van Wilgen, BW Date: Jan 2004 This article examines scientific challenges in the field of invasion alien plant management in South Africa. Overview of the Working for Water program, Issues of research funding, and Biological control research. It also includes some of the ... Read more
Structural characterization of vegetation in the fynbos biome

Author: Campbell, BM ; Cowling, RM ; Bond, W ; Kruger, FJ ; Bands, DP ; Boucher, C ; Moll, EJ ; Taylor, HC ; Van Wilgen, BW Date: Aug 1981 A proposed system for the standardization of descriptive terminology for structural characterization of vegetation in the Fynbos Biome is presented in tabular form. Specific applications of the system are described and illustrations of some ... Read more
Sustainable development and the environment: lessons from the St Lucia environmental impact assessment

Author: Kruger, FJ ; Van Wilgen, BW ; Weaver, AV ; Greyling, T Date: Jan 1997 The environmental impact assessment (ETA) on the effects of the proposed mining on the Eastern Shores of Lake St Lucia was arguably the largest and most transparent yet undertaken on the African continent. It assessed the consequences of ... Read more
Three centuries of managing introduced conifers in South Africa: benefits, impacts, changing perceptions and conflict resolution

Author: Van Wilgen, BW ; Richardson, DM Date: May 2012 Alien conifers, mainly pines, have been planted in South Africa for a range of purposes for over 300 years. Formal plantations cover 660 000 ha of the country, and invasive stands of varying density occur on a further 2.9 million ha. These ... Read more
Towards adaptive fire management for biodiversity conservation: experience in South African national parks

Author: Van Wilgen, BW ; Govender, N ; Forsyth, GG ; Kraaij, T Date: May 2011 This paper reviews the experience gained in three South African national parks (Kruger, Table Mountain and Bontebok) with regard to the adaptive management of fire for the conservation of biodiversity. In the Kruger National Park, adaptive ... Read more
Trends in woody vegetation cover in the Kruger National Park, South Africa, between 1940 and 1998

Author: Eckhardt, HC ; Van Wilgen, BW ; Biggs, H Date: Jun 2000 South Africa’s Kruger National Park is one of the largest conservation areas in Africa. In 1940, 1974 and 1998 changes in the cover and density of shrubs and trees were assessed from aerial photographs, and in 1984 and 1996 fixed-point ... Read more
Turning strategy into action: implementing a conservation action plan in the Cape Floristic Region

Author: Gelderblom, CM ; Van Wilgen, BW ; Nel, JL ; Sandwith, T ; Botha, M ; Hauck, M Date: Jul 2003 The Cape Floristic Region and adjoining marine areas have exceptionally high levels of biodiversity and endemism, concentrated in a relatively small area of 90,000 km2. Major threats to this biodiversity include the loss of habitat to ... Read more
What limits fire? an examination of drivers of burnt area in Southern Africa

Author: Archibald, SA ; Roy, DP ; Van Wilgen, BW ; Scholes, RJ Date: Mar 2009 The factors controlling the extent of fire in Africa south of the equator were investigated using moderate resolution (500 m) satellite-derived burned area maps and spatial data on the environmental factors thought to affect burnt area. A ... Read more

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