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Browsing by Author "Richardson, David Mark"

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Alien plant invasion on the Agulhas Plain : a detailed description of invasion patterns

Author: Blanchard, Ryan Date: 2004 Invasive alien species occur within several biodiverse regions of South Africa. It is not yet fully understood the extent to which invasive alien species affect natural vegetation. It is important to classify such species based on abundance ... Read more
The ecology of invasions by Pinus (pinaceae) and Hakea (proteaceae) species, with special emphasis on patterns, processes and consequences of invasion in mountain fynbos of the southwestern Cape Province, South Africa

Author: Richardson, David Mark Date: 1989 The fire-prone mountain fynbos of the southwestern Cape Province of South Africa has been severely invaded by introduced trees and shrubs. These invasions have transformed fynbos shrublands to dense thickets of trees and shrubs in many parts ... Read more
Ecosystem level impacts of annual and perennial N2-fixing invasive alien plants in the fynbos vegetation of South Africa

Author: Yelenik, Stephanie Date: 2000 In the nutrient-poor fynbos, changes in soil nutrients can affect species composition and community structure. The N2-fixing ability of invasive alien plants, therefore, may have impacts on ecosystem and community functioning within the fynbos ... Read more
The effects of fragmentation of South Coast Renosterveld on vegetation patterns and processe

Author: Kemper, Jessica Date: 1997 This thesis investigates the effects of fragmentation on vegetation patterns and processes of South Coast Renosterveld at three hierarchical levels. South Coast Renosterveld is a grassy shrubland derived from shales on the coastal forelands ... Read more
A model of a rangeland grazing system within a management procedure approach framework

Author: Soares, Muri Date: 2007 A model describing livestock grazing system dynamics was developed and fitted to available data. This study preliminarily explored the use of a formal management procedure (MP) approach to determine appropriate annual offtake in a terrestrial ... Read more
Pattern and process of plant invasion in an African savanna ecosystem, with emphasis on multiple spatial and temporal scales

Author: Foxcroft, Llewellyn Courtney Date: 2007 Biological invasions are a signiﬁcant ecological and economic global crisis. Protected areas also suffer from the increased burden that invasions place on their resources and the impacts placed on the ecosystem. However, management requires ... Read more
Patterns of parasitism and emergence in the gall midge Dasineura Dielsii (Diptera: Cecidomyiidae) : a biological control agent of Acacia cyclops in South Africa

Author: Wheat, Nicola M Date: 2004 Acacia cyclops A. Cunn. ex G. Don is an invasive alien plant that invades fynbos and coastal dunes. Several acacia species are grown commercially in South Africa and this has limited biocontrol agents to those that reduce only reproductive ... Read more
The reconstruction of late quaternary vegetation and climatic patterns on the Cape West Coast, using a charcoal sequence from Elands Bay Cave

Author: Allsopp, Janet Christine Natalie Date: 1998 A taxonomically well resolved sequence of charcoal spanning the past 40 000 years from the Elands Bay Cave was used in this thesis to achieve two main objectives: firstly to determine the plant communities which occurred in the past to compare ... Read more
Studies on aspects of the integrated control of Hakea sericea in the South-western Cape Province, South Africa

Author: Richardson, David Mark Date: 1985 Invasion by alien woody plants is a major conservation threat in the sclerophyllous shrubland vegetation of the southwestern Cape Province which is known as fynbos. The Australian shrub, Hakea sericea (Proteaceae)is the most serious threat ... Read more

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Browsing by Author "Richardson, David Mark"

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