Articles by Author: Lesley A Gibson

Search results for Lesley A Gibson

We found 54 results for you
  1. Exploring the invasion of rangelands by <em>Acacia mearnsii</em> (black wattle): biophysical characteristics and management implications

    Exploring the invasion of rangelands by <em>Acacia mearnsii</em> (black wattle): biophysical characteristics and management implications

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Australian acacias have spread to many parts of the world. In South Africa, species such as A. mearnsii and dealbata are invasive. Consequently, more effort has focused on their clearing. In a context of increasing clearing costs, it is crucial...
  2. Determining fPAR and leaf area index of several land cover classes in the Pot River and Tsitsa River catchments of the Eastern Cape, South Africa

    Determining fPAR and leaf area index of several land cover classes in the Pot River and Tsitsa River catchments of the Eastern Cape, South Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Determining the quantum (both annual maxima and minima) and the temporal variation in the leaf area index (LAI), and the fraction of photosynthetically active radiation (fPAR), are three fundamental biophysical characteristics of the plant canopy that should parameterise ecophysiological models...
  3. Estimating evapotranspiration in semi-arid rangelands: connecting reference to actual evapotranspiration and the role of soil evaporation

    Estimating evapotranspiration in semi-arid rangelands: connecting reference to actual evapotranspiration and the role of soil evaporation

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    In a context of water scarcity, efforts to increase landscape production should focus on improving water productivity. This requires an appreciation of the various components of evapotranspiration (ET), including soil evaporation (Es) because the latter reflects ‘unproductive’ water loss. Both...
  4. Constructions of Masculinity, Mental Toughness and the Inexpressibility of Distress among a Selected Group of South African Veterans of the ‘Bush War’ in Namibia

    Constructions of Masculinity, Mental Toughness and the Inexpressibility of Distress among a Selected Group of South African Veterans of the ‘Bush War’ in Namibia

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    The study examined the manner in which conscripted combat veterans make meaning of their violent experiences during the apartheid-era ‘Bush War’ in the border area between Namibia and Angola. A total of 43 ex-combatants participated in the study (23 Afrikaans-speaking;...
  5. An analysis of language problems identified in writing by low achieving first-year students, with some suggestions for remediation

    An analysis of language problems identified in writing by low achieving first-year students, with some suggestions for remediation

    Item type: Journal Article • Journal: Southern African Linguistics and Applied Language Studies
    The new four-year LLB curriculum at the University of Natal, Durban, involves students in a considerable amount of writing in the first year—writing of legal opinions and case summaries. Fourth-year students are trained as tutors, and also as markers of...