Articles by Keyword: Biological Invasions

Search results for Biological Invasions

We found 52 results for you
  1. Australian acacias as invasive species: lessons to be learnt from regions with long planting histories

    Australian acacias as invasive species: lessons to be learnt from regions with long planting histories

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Problems associated with invasiveness of non-native tree species used in forestry are increasing rapidly worldwide and are most severe in areas with a long history of plantings. Lessons learnt in areas with long histories of plantings and invasions may be...
  2. First record of the Southeast Asian walking catfish, <em>Clarias batrachus</em> (Pisces: Clariidae), from the island of Mauritius, south-western Indian Ocean

    First record of the Southeast Asian walking catfish, <em>Clarias batrachus</em> (Pisces: Clariidae), from the island of Mauritius, south-western Indian Ocean

    Item type: Journal Article • Journal: African Zoology
    The presence of Southeast Asian walking catfish, Clarias batrachus, in Mauritian freshwater systems has been confirmed. Three female Clarias batrachus were caught in Rivière Sèche, close to the town of Phoenix, Mauritius (20°17′ S, 57°33′ E). This constitutes the first...
  3. Allelopathic effects of invasive <em>Eucalyptus camaldulensis</em> on germination and early growth of four native species in the Western Cape, South Africa

    Allelopathic effects of invasive <em>Eucalyptus camaldulensis</em> on germination and early growth of four native species in the Western Cape, South Africa

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Eucalyptus camaldulensis Dehnh. (red river gum; Myrtaceae) is an invasive tree in riparian habitats of the Western Cape, South Africa, where it replaces indigenous vegetation and affects ecosystem functioning. These invasions lead to changes in river geomorphology and reduction in...
  4. The harvest index of individual ears of four South African wheat (<em>Triticum aestivum</em> L.) cultivars

    The harvest index of individual ears of four South African wheat (<em>Triticum aestivum</em> L.) cultivars

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Increasing the harvest index is a major route to higher yields in regions where a crop has had a lengthy period of selection and adaptation. No information could be found on differences in the harvest indices of the main stems...
  5. Soil organic matter and microbial biomass as influenced by sugar cane (<em>Saccharum hybrid</em> sp.) production practices in Mauritius

    Soil organic matter and microbial biomass as influenced by sugar cane (<em>Saccharum hybrid</em> sp.) production practices in Mauritius

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Sugar cane has been grown in Mauritius for over 350 years in a monocropping system. As a result, soil quality could have declined since productivity has been stagnating over the last twenty years in spite of improved agronomic practices and...
  6. Effects of liming on microbial activity and N mineralization in broiler manure-amended soils from Bizana, Eastern Cape, South Africa

    Effects of liming on microbial activity and N mineralization in broiler manure-amended soils from Bizana, Eastern Cape, South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A laboratory incubation study was conducted to determine the effects of liming on microbial activity and N mineralization in two Bizana soils amended with broiler manure. The experimental layout was a 4 x 3 complete factorial experiment with three replicates,...
  7. Host-specificity testing of <em>Puccinia xanthii</em> var. <em>parthenii-hysterophorae</em>, a potential biocontrol agent for <em>Parthenium hysterophorus</em> in South Africa

    Host-specificity testing of <em>Puccinia xanthii</em> var. <em>parthenii-hysterophorae</em>, a potential biocontrol agent for <em>Parthenium hysterophorus</em> in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Following its introduction into Australia, the rust fungus Puccinia xanthii var. parthenii-hysterophorae has played an important role in the integrated approach to manage Parthenium hysterophorus. The rust was imported from Australia and established within quarantine facilities in South Africa. Supplementary...
  8. Preliminary evaluation of the effectiveness of <em>Rhizobium leguminosarum</em> bv. <em>viceae</em> strains in nodulating hairy vetch (<em>Vicia villosa</em>) in the sandy soils of Zimbabwe

    Preliminary evaluation of the effectiveness of <em>Rhizobium leguminosarum</em> bv. <em>viceae</em> strains in nodulating hairy vetch (<em>Vicia villosa</em>) in the sandy soils of Zimbabwe

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Hairy vetch (Vicia villosa Roth) is an introduced temperate forage legume in Zimbabwe that has no locally available commercial inoculant. In this study, Rhizobium leguminosarum bv. viceae strains MAR 1504, MAR 833 and MAR 346 available in Zimbabwe's strain bank...
  9. Changes in some key biological parameters of the northern Benguela sardine stock

    Changes in some key biological parameters of the northern Benguela sardine stock

    Item type: Journal Article • Journal: South African Journal of Marine Science
    During the past 50 years, more than 15 million tons of sardine have been harvested from the northern Benguela ecosystem. The sardine population has undergone changes in abundance estimated to range over more than two orders of magnitude, but for...
  10. An assessment of the current status and potential yield of Namibia's northern West Coast steenbras <em>Lithognathus aureti</em> population

    An assessment of the current status and potential yield of Namibia's northern West Coast steenbras <em>Lithognathus aureti</em> population

    Item type: Journal Article • Journal: South African Journal of Marine Science
    Two distinct populations of West Coast steenbras Lithognathus aureti are found in Namibian waters; one, the northern population, is exploited recreationally and commercially. Data collected between 1995 and 1999 were used to evaluate its current state and potential yield, using...