Articles by Author: Ayanda Sigwela

Search results for Ayanda Sigwela

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  1. Changes in forest cover and carbon stocks of the coastal scarp forests of the Wild Coast, South Africa

    Changes in forest cover and carbon stocks of the coastal scarp forests of the Wild Coast, South Africa

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Land-use intensification and declines in vegetative cover are considered pervasive threats to forests and biodiversity globally. The small extent and high biodiversity of indigenous forests in South Africa make them particularly important. Yet, relatively little is known about their rates...
  2. Ecosystem carbon storage under different land uses in three semi-arid shrublands and a mesic grassland in South Africa

    Ecosystem carbon storage under different land uses in three semi-arid shrublands and a mesic grassland in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Carbon (C) storage in biomass and soils is a function of climate, vegetation type, soil type and land management. Carbon storage was examined in intact indigenous vegetation and under different land uses in thicket (250–400 mm mean annual precipitation), xeric...
  3. Responses of the African catfish <em>Clarias gariepinus</em> to long-term exposure to glyphosate- and paraquat-based herbicides

    Responses of the African catfish <em>Clarias gariepinus</em> to long-term exposure to glyphosate- and paraquat-based herbicides

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Direct and indirect contamination of the aquatic environment by pesticides results in a decrease in fish productivity and may elevate concentrations of undesirable chemicals in edible fish tissues. The effects of long-term exposure of Clarias gariepinus juveniles to sublethal concentrations...