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Browsing by Author "Le Maitre, David C"

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Alarming plant dieback in the Outeniquas : is this an indication of global warming? Monitoring plant populations

Author: Rebelo, T ; Le Maitre, David C ; Schutte-Vlok, A ; Smart, M ; Vlok, J ; West, A ; Williams, G Date: Mar 2009 With enhanced global warming predicted to have major impacts on our flora and fauna, environmentalists are on the lookout for any signs of our flora responding to climate change. So it was with alarm that Nick Helme reported mass mortality ... Read more
Alien plant invasions in South Africa: driving forces and the human dimension

Author: Le Maitre, David C ; Richardson, DM ; Chapman, RA Date: Jan 2004 Invasive alien plants pose a substantial threat to the rich biodiversity of South Africa, and to the sustained delivery of a wide range of ecosystem services. Biological invasions are driven by human activities and mediated by culturally ... Read more
Assessing the success of experimental rehabilitation on a coastal mineral sands mine in Namaqualand, South Africa

Author: Pauw, MJ ; Esler, KJ ; Le Maitre, David C Date: Nov 2018 The success of different rehabilitation treatments following surface mining on the arid west coast of South Africa was assessed. Treatments consisting of one or a combination of topsoil addition, plant translocation and seeding were applied ... Read more
Assessing water use by Prosopis invasions and Vachellia karroo trees: Implications for groundwater recovery following alien plant removal in an arid catchment in South Africa

Author: Dzikiti, Sebinasi ; Ntshidi, Zanele ; Le Maitre, David C ; Bugan, Richard DH ; Mazvimavi, D ; Schachtschneider, K ; Jovanovic, Nebojsa ; Pienaar, Harrison H Date: Aug 2017 Prosopis spp., (or Mesquite), is a desert adapted woody weed which has invaded large parts of arid and semi-arid regions. It has a characteristic deep tap root, and forms dense impenetrable thickets along river banks, flood plains, and seasonal ... Read more
An assessment of the effectiveness of a large, national-scale invasive alien plant control strategy in South Africa

Author: Van Wilgen, BW ; Forsyth, GG ; Le Maitre, David C ; Wannenburgh, A ; Kotzé, JDF ; Van den Berg, E ; Henderson, L Date: Apr 2012 This paper presents an assessment of a large, national-scale alien plant control program that has operated in South Africa for 15 years. We reviewed data from three national-level estimates of the extent of invasion, records of the costs and ... Read more
Characterising the water use and hydraulic properties of riparian tree invasions: A case study of Populus canescens in South Africa

Author: Ntshidi, Zanele ; Gush, Mark B ; Dzikiti, Sebinasi ; Le Maitre, David C Date: Apr 2018 Invasive alien plants (IAPs) pose a serious threat to the already limited water resources in dry countries like South Africa which are facing increasing water shortages. Much of South Africa is expected to get drier in future due to climate ... Read more
Classification of veldfire risk in South Africa for the administration of the legislation regarding fire management

Author: Kruger, FJ ; Forsyth, GG ; Kruger, LM ; Slater, K ; Le Maitre, David C ; Matshate, J Date: Nov 2006 The risk associated with vegetation fires (veldfires) in South Africa is substantial, and veldfires cause severe losses to life, property and the environment in most areas of the country. However, this risk has two parts: first, that arising ... Read more
Communicating the value of fynbos: results of a survey of stakeholders

Author: Le Maitre, David C ; Gelderblom, C ; Maphasa, L ; Yssel, S ; Van den Belt, M ; Manuel, T Date: Aug 1997 The objective of this study was to determine what value was placed on the endemic fynbos vegetation by students from a range of socio-economic backgrounds. Students at four schools were given: (a) a questionnaire to assess their existing ... Read more
Comparison of two remote sensing models for estimating evapotranspiration: algorithm evaluation and application in seasonally arid ecosystems in South Africa

Author: Dzikiti, Sebinasi ; Jovanovic, Nebojsa ; Bugan, Richard DH ; Ramoelo, Abel ; Majozi, Nobuhle P ; Nickless, Alecia ; Cho, Moses A ; Le Maitre, David C ; Ntshidi, Zanele ; Pienaar, Harrison H Date: Sep 2019 Remote sensing tools are becoming increasingly important for providing spatial information on water use by different ecosystems. Despite significant advances in remote sensing based evapotranspiration (ET) models in recent years, important ... Read more
Comparison of water-use by alien invasive pine trees growing in riparian and non-riparian zones in the Western Cape Province, South Africa

Author: Dzikiti, Sebinasi ; Schachtschneider, K ; Naiken, V ; Gush, Mark B ; Le Maitre, David C Date: Apr 2013 Self-established stands of alien invasive pine trees are common in many parts of South Africa and elsewhere. They mainly invade non-riparian settings but sometimes invade riparian habitats. There are clear visual differences in the physical ... Read more
Computer system for catchment management: background, concepts and development

Author: Le Maitre, David C ; Van Wilgen, BW ; Richardson, DM Date: 1993 Managers of natural areas require a wide variety of up-to-date and accurate information and maps to manage their lands effectively. This paper reviews the objectives of conservation management, and the problems faced by mountain catchment ... Read more
Costs and benefits of biological control of invasive alien plants: case studies from South Africa

Author: Van Wilgen, BW ; De Wit, MP ; Anderson, HJ ; Le Maitre, David C ; Kotze, IM ; Ndala, S ; Brown, B ; Rapholo, MB Date: Jan 2004 Invasive alien species can have significant negative environmental and economic impacts. Such species are often controlled biologically by means of introducing host-specific insects or pathogens that can reduce the species' invasive potential. ... Read more
Costs, benefits and management options for an invasive alien tree species: the case of mesquite in the Northern Cape, South Africa

Author: Wise, RM ; Van Wilgen, BW ; Le Maitre, David C Date: Aug 2012 Mesquite (Prosopis species) were introduced to South Africa to provide fodder and shade for livestock, but some have become invasive, impacting on water and grazing resources. Mesquite’s net economic effects are unclear and their unequal ... Read more
Disturbance and the dynamics of fynbos biome communities

Author: Cowling, RM ; Le Maitre, David C ; McKenzie, B ; Prys-Jones, RP ; Van Wilgen, BW Date: 1987 This volume comprises invited review and research papers dealing with the effects of disturbance on the dynamics of fynbos biome communities. Since fire is the most important disturbance factor in the biome, most contributions concentrate ... Read more
Ecological economic simulation model of mountain fynbos ecosystems - dynamics, valuation and management

Author: Higgins, SI ; Turpie, JK ; Costanza, R ; Cowling, RM ; Le Maitre, David C ; Marais, C ; Midgley, GF Date: Aug 1997 Mountain fynbos ecosystems in South Africa are threatened by alien plant invasions and by a lack of funding for effective management of these invasions. This paper develops an ecological-economic argument for the effective management of plant ... Read more
Ecosystem services, efficiency, sustainability and equity: South Africa's Working for Water Programme

Author: Van Wilgen, BW ; Le Maitre, David C ; Cowling, RM Date: Sep 1998 In this paper, South Africa’s working for water programme is described. The programme maximizes an ecosystem services (the delivery of water), enhances sustainability by eliminating invading alien plants, and promotes social equity through ... Read more
Ecosystem services, land-cover change, and stakeholders: finding a sustainable foothold for a semiarid biodiversity hotspot

Author: Reyers, B ; O'Farrell, Patrick J ; Cowling, RM ; Egoh, Benis N ; Le Maitre, David C ; Vlok, JHJ Date: 2009 Land-cover change has been identified as one of the most important drivers of change in ecosystems and their services. However, information on the consequences of land cover change for ecosystem services and human well-being at local scales ... Read more
The effect of accessibility and value addition on the costs of controlling invasive alien plants in South Africa: A three-species system dynamics model in the fynbos and grassland biomes

Author: Crookes, DJ ; Blignaut, JN ; Le Maitre, David C Date: Nov 2020 We developed a two-biome (grasslands and fynbos) system dynamics model simulating invasions of three invasive alien plant species – black wattle (Acacia mearnsii) and two pine species (Pinus patula and Pinus pinaster) – and some of the ... Read more
Effects of land use change on streamflow and stream water quality of a coastal catchment

Author: Petersen, Chantel R ; Jovanovic, Nebojsa ; Le Maitre, David C ; Grenfell, MC Date: Jan 2017 This study aimed to link land cover/use change to water quality in an important water supply coastal catchment. The approach followed a spatial and temporal analysis of historical catchment land use change to assess how changes influenced ... Read more
Forest evaporation models: Relationships between stand growth and evaporation

Author: Le Maitre, David C ; Versfeld, DB Date: Jun 1997 The relationships between forest stand structure, growth and evaporation were analysed to determine whether forest evaporation can be estimated from stand growth data. This approach permits rapid assessment of the potential impacts of ... Read more

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