Articles by Keyword: Alien Trees

Search results for Alien Trees

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  1. Roosting requirements of Helmeted Guineafowl <em>Numida meleagris</em> on Highveld grain and livestock farms with alien tree groves, Gauteng province, South Africa

    Roosting requirements of Helmeted Guineafowl <em>Numida meleagris</em> on Highveld grain and livestock farms with alien tree groves, Gauteng province, South Africa

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    This study describes the relationship between Helmeted Guineafowl Numida meleagris and invasive alien trees on livestock and maize farms south-east of Johannesburg, Gauteng province, South Africa. The dependence of the birds on alien trees affects strategies for the removal of...
  2. Reductions in Plant Species Richness under Stands of Alien Trees and Shrubs in the Fynbos Biome

    Item type: Journal Article • Journal: South African Forestry Journal
    The reduction of species richness of indigenous plants is one of the major problems associated with the presence of dense stands of invasive alien trees and shrubs in the Fynbos Biome of the Cape Province, South Africa. A synthesis was...
  3. Commercial Forestry on Signal Hill and Lion's Head, Cape Town

    Item type: Journal Article • Journal: South African Forestry Journal
    The history of afforestation with alien tree species on Signal Hill and Lion's Head, which form part of the Table Mountain Nature Reserve, Cape Town, was reconstructed. The natural vegetation comprises mostly West Coast Renosterveld which is considered the most...
  4. Seisoensveranderinge in die koolhidraatinhoud van jong appelbome

    Seisoensveranderinge in die koolhidraatinhoud van jong appelbome

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Gereelde ontledings van die koolhidraatfraksies in jong appelbome het getoon dat suiker 'n relatief klein gedeelte van die koolhidrate in die boomdele uitmaak, en veral in die wortels voorkom. Stysel akkumuleer in die wortels tot finale blaarval in die winter,...
  5. Seasonal uptake of phosphorus, potassium, calcium and magnesium by young peach trees

    Seasonal uptake of phosphorus, potassium, calcium and magnesium by young peach trees

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Two-year-old peach trees, grown in sand culture were destructively sampled over a period of 14 months, to determine the uptake of phosphorus, potassium, calcium and magnesium in the new growth (leaves, fruit and new shoots) and in the permanent structure...
  6. Costing the initial clearance of alien <em>Acacia</em> species invading fynbos vegetation

    Costing the initial clearance of alien <em>Acacia</em> species invading fynbos vegetation

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The costs of the initial clearing of mixed stands of the alien Acacia cyclops and A. saligna invading fynbos vegetation were compared in a replicated trial on the Pella Fynbos Research Site. Costs were estimated using a regression-based model of...
  7. Effect of paclobutrazol on vegetative growth in citrus nursery trees

    Effect of paclobutrazol on vegetative growth in citrus nursery trees

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Two foliar sprays of paclobutrazol applied at four different concentrations, viz. 50,100, 200 and 500 mg a.i. l−1 on Citrus volkameriana (Ten. & Parq.) under greenhouse conditions, showed that concentrations of 100 mg l−1and above are suitable for reducing undesirable...
  8. FRESHWATER FISH CONSERVATION IN SOUTH AFRICA: A RISING TIDE

    FRESHWATER FISH CONSERVATION IN SOUTH AFRICA: A RISING TIDE

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Attitudes towards the conservation of South African indigenous freshwater fishes have changed radically. Initially alien sport angling species were the focus of fisheries interest and local fishes were considered worthless. Gradually, in response to the work of collectors, taxonomists and...
  9. AN ASSESSMENT OF THE POTENTIAL IMPACT OF ALIEN INVASIVE VEGETATION ON THE GEOMORPHOLOGY OF RIVER CHANNELS IN SOUTH AFRICA

    AN ASSESSMENT OF THE POTENTIAL IMPACT OF ALIEN INVASIVE VEGETATION ON THE GEOMORPHOLOGY OF RIVER CHANNELS IN SOUTH AFRICA

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    Invasion of the riparian zone by alien vegetation is recognised as a serious problem in many areas of South Africa. Vegetation is a dynamic component of river channels. It is an important control variable affecting channel form whereas the flow...
  10. FIRST RECORD OF <em>OREOCHROMIS MACROCHIR</em> (BOULENGER, 1912) (PISCES:CICHLIDAE) FROM THE LIMPOPO RIVER IN SOUTHERN AFRICA.

    FIRST RECORD OF <em>OREOCHROMIS MACROCHIR</em> (BOULENGER, 1912) (PISCES:CICHLIDAE) FROM THE LIMPOPO RIVER IN SOUTHERN AFRICA.

    Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences
    During 1973/74, Barbus poechii, Oreochromis macrochir, O. andersonii, Serranochromis angusticeps, S. codringtonii, S. robustus and S. thumbergi from the Okavango System were introduced into the Shashe Dam (Limpopo System, Botswana). These species are alien to the Limpopo System. A fish...