Articles by Keyword: Plant Herbivore Interactions

Search results for Plant Herbivore Interactions

We found 172 results for you
  1. Scale, heterogeneity and secondary production in tropical rangelands

    Scale, heterogeneity and secondary production in tropical rangelands

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Tropical rangelands across the world are experiencing land use intensification pressures which are reducing the spatial scale of grazing management units. There are implications of a reduction in scale on environmental heterogeneity and its relationship with secondary production of large...
  2. Do we understand the causes of bush encroachment in African savannas?

    Do we understand the causes of bush encroachment in African savannas?

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Bush encroachment affects the agricultural productivity and biodiversity of 10–20 million ha of South Africa. Many people believe that we understand the causes of bush encroachment. We do not. Many people believe that either fire or heavy grazing by domestic...
  3. Herbaceous plant species richness and composition in moist Midlands Mistbelt Grasslands in KwaZulu-Natal: is there a relationship to veld condition?

    Herbaceous plant species richness and composition in moist Midlands Mistbelt Grasslands in KwaZulu-Natal: is there a relationship to veld condition?

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    This study investigated the relationship between grazing veld condition and herbaceous plant species richness in the moist Midlands Mistbelt Grassland in KwaZulu-Natal. The observed herbaceous plant species richness and composition of 12 sample plots (50 m × 50 m) was...
  4. Diet selection of goats depends on season: roles of plant physical and chemical traits

    Diet selection of goats depends on season: roles of plant physical and chemical traits

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    This paper reports on diet selection of goats offered six browse species (i.e. Acacia natalitia [Vachellia natalitia], Acacia nilotica [Vachellia nilotica], Dichrostachys cinerea, Grewia occidentalis, Gymnosporia maranguensis and Scutia myrtina) commonly found in moist Zululand thornveld. The hypotheses tested were:...
  5. The effect of ungulate grazing on a small mammal community in southeastern Botswana

    The effect of ungulate grazing on a small mammal community in southeastern Botswana

    Item type: Journal Article • Journal: African Zoology
    Ungulates can reduce the quantity of food available for other herbivores in general or reduce the available cover for small mammals in particular. On the other hand, browsing and grazing may facilitate foraging by other mammals if the quality and...
  6. Sustainable intensification of cultivated pastures using multiple herbivore species

    Sustainable intensification of cultivated pastures using multiple herbivore species

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Demand for animal products is growing faster than for any other agricultural product. As a result, pressure for greater output from cultivated pastures is expected to increase. Assuming cultivated pasture area will decrease with land degradation, conversion to grain crops...
  7. Suppression of the aquatic weed <em>Hydrilla verticillata</em> (L.f.) Royle (Hydrocharitaceae) by a leaf-cutting moth <em>Parapoynx diminutalis</em> Snellen (Lepidoptera: Crambidae) in Jozini Dam, South Africa

    Suppression of the aquatic weed <em>Hydrilla verticillata</em> (L.f.) Royle (Hydrocharitaceae) by a leaf-cutting moth <em>Parapoynx diminutalis</em> Snellen (Lepidoptera: Crambidae) in Jozini Dam, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    A classical biological control programme against Hydrilla verticillata (L.f.) Royle (Hydrocharitaceae) was initiated in South Africa following the discovery of extensive mats in Jozini Dam in northern KwaZulu-Natal (KZN) in 2006. However, in mid-2008, high densities of a phytophagous insect,...
  8. Optimising stocking rate under commercial and subsistence pastoralism <em>optimisering van veelading by kommersiele en bestaansveeboerdery</em>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Hopes for a single criterion of overstocking are forlorn. Livestock may be kept for any of many purposes, and the stocking rate optimal for one is not necessarily so for another. Conflicts might be resolved by (1) recognising the likely...
  9. Intra-annual variation of arthropod-plant interactions and arthropod trophic structure in an endangered grassland in the Free State province, South Africa

    Intra-annual variation of arthropod-plant interactions and arthropod trophic structure in an endangered grassland in the Free State province, South Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Arthropods are valuable biological indicators owing to strong relationships with primary producers. The supposition that arthropod-plant interactions are constant over seasons was tested using Mantel tests on correlations between these groups. A total of 78 plant species and 108 arthropod...
  10. Using synergistic exogenous phytohormones to enhance somatic embryogenesis from leaf explants of a <em>Eucalyptus grandis</em> clone

    Using synergistic exogenous phytohormones to enhance somatic embryogenesis from leaf explants of a <em>Eucalyptus grandis</em> clone

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Somatic embryogenesis (SE) in Eucalyptus spp. has been limited to germinated seeds, flowers, lignotubers or zygotic embryos. The low yield of somatic embryos from leaf explants has hampered progress, even though leaves offer a more viable source of clonal explants...