Articles by Author: Kevin P Kirkman

Search results for Kevin P Kirkman

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  1. Burning Issues: Sustainability and Management of Australia's Southern Forests

    Burning Issues: Sustainability and Management of Australia's Southern Forests

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    2011, CSIRO Publishing, 150 Oxford Street, PO Box 1139, Collingwood, VIC 3036, Australia
  2. <em>Themeda triandra</em>: a keystone grass species

    <em>Themeda triandra</em>: a keystone grass species

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Themeda triandra is a perennial tussock grass endemic to Africa, Australia and Asia. Within these regions it is found across a broad range of climates, geological substrates and ecosystems. Because it is widespread across these areas it has great economic...
  3. Savanna browse production. 1: Determinants and measurement

    Savanna browse production. 1: Determinants and measurement

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    With the rapid expansion of wildlife ranching and conservation in South African savannas and the resultant increase in multi-species grazing and browsing systems, information on browse production potential is essential for determination of carrying capacity. This study, conducted on three...
  4. Savanna browse production. 2: Prediction

    Savanna browse production. 2: Prediction

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Browsing herbivores are generally highly selective feeders, selecting for new shoots and young plant material. Determinations of browser carrying capacity are then greatly inflated when based on available browse biomass estimates. Our study was initiated with the aim of modelling...
  5. Determinants of the occurrence of a native encroacher species, <em>Pechuelloeschea leubnitziae</em> (wild sage), in the eastern Okavango Delta, Botswana

    Determinants of the occurrence of a native encroacher species, <em>Pechuelloeschea leubnitziae</em> (wild sage), in the eastern Okavango Delta, Botswana

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Although indigenous to southern Africa, Pechuel-loeschea leubnitziae is considered a problematic weed as it forms dense monotypic stands in the grasslands and woodlands of the Okavango Delta, Botswana, and is associated with veld degradation and a dominance of shade-tolerant, poor-quality...
  6. Nutrient addition increases biomass of soil fungi: evidence from a South African grassland

    Nutrient addition increases biomass of soil fungi: evidence from a South African grassland

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Theory predicts that nutrient addition to soil reduces the benefit of mycorrhizal associations to plants. This study sought to determine how long-term management of soil fertility influences the abundance of fungal mycelium. Ingrowth mesh bags were used to measure mycelial...
  7. Does high-density stocking affect perennial forbs in mesic grassland?

    Does high-density stocking affect perennial forbs in mesic grassland?

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Livestock production is an appropriate land use for mainstreaming biodiversity conservation, but little is known about the impact of grazing strategies on forbs that contribute most species, in grasslands. This study compared the effects of high-density, short-duration stocking (HDG) with...
  8. Optimal grazing management strategies: evaluating key concepts

    Optimal grazing management strategies: evaluating key concepts

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Rangeland management strategies must be based on robust ecological and economic concepts if they are to be effective and profitable. Thus, the aim of this paper was to examine concepts related to grazing and resting of grassland and associated effects...
  9. What are the long-term effects of high-density, short-duration stocking on the soils and vegetation of mesic grassland in South Africa?

    What are the long-term effects of high-density, short-duration stocking on the soils and vegetation of mesic grassland in South Africa?

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    High-density, short-duration stocking (HDG) is gaining popularity amongst farmers in the South African mesic grasslands, but little is known about its potential impact on natural resources. Using a fence-line contrast approach, this study compared the long-term effects of HDG with...
  10. Does Holistic Planned Grazing™ work on native rangelands?

    Does Holistic Planned Grazing™ work on native rangelands?

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The balance of papers in this Special Issue show that how Holistic Planned Grazing™ is managed and where it is used impacts the efficacy of the approach. While we will do well to develop more mechanistic models that can identify...