Articles by Keyword: Human Disturbance

Search results for Human Disturbance

We found 155 results for you
  1. South Africa's coastal-breeding white-breasted cormorants: population trends, breeding season and movements, and diet

    South Africa's coastal-breeding white-breasted cormorants: population trends, breeding season and movements, and diet

    Item type: Journal Article • Journal: African Journal of Marine Science
    White-breasted cormorants Phalacrocorax [carbo] lucidus breed around South Africa's coast and at inland localities. Along the coasts of the Northern, Western and Eastern Cape provinces, numbers breeding were similar during the periods 1977–1981 (1 116 pairs at 41 localities) and...
  2. Physiological stress levels in the endemic and endangered Udzungwa red colobus vary with elevation

    Physiological stress levels in the endemic and endangered Udzungwa red colobus vary with elevation

    Item type: Journal Article • Journal: African Zoology
    Habitat loss and fragmentation inevitably cause biodiversity decline, a major concern for the conservation of endangered species. Primates are of particular interest, because they are highly vulnerable to forest fragmentation. In this study, we investigated faecal glucocorticoid measurements (FGCM), an...
  3. Interspecific variation in the distribution of ungulates relative to human infrastructure surrounding Amboseli National Park

    Interspecific variation in the distribution of ungulates relative to human infrastructure surrounding Amboseli National Park

    Item type: Journal Article • Journal: African Zoology
    The presence of humans and man-made structures may cause increased wariness in wildlife, causing displacement from traditional habitat ranges. Potential species differences in such responses could affect the composition of wildlife communities around human settlements. We examined the position of...
  4. Population estimates of the breeding birds of the Tinhosas islands (Gulf of Guinea), the only major seabird colony of the eastern tropical Atlantic

    Population estimates of the breeding birds of the Tinhosas islands (Gulf of Guinea), the only major seabird colony of the eastern tropical Atlantic

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    The Tinhosas islands, in São Tomé e Príncipe, host the most important seabird breeding colony in the Gulf of Guinea, but information on its conservation status was hitherto unpublished or anecdotal, the last assessment having been performed in 1997. A...
  5. Managing human disturbance: factors influencing flight-initiation distance of birds in a West African nature reserve

    Managing human disturbance: factors influencing flight-initiation distance of birds in a West African nature reserve

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Escape behaviour in response to perceived predators can be employed as a guide when designating protected areas around sensitive bird species to minimise the impact of human disturbance. A key measure of escape response is flight-initiation distance (FID), the distance...
  6. Conserving rangeland resources <em>die bewaring van veldhulpbronne</em>

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The aims of the paper are to (1) identify the properties of conservation, (2) explain its poor implementation, and (3) propose remedies.
  7. A preliminary investigation of woody plant increase in the western Transvaal and implications for veld assessment

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    The relationships between tree density and indices of pasture and soil condition were examined in Western Transvaal grasslands where Acacia karroo had increased following disturbance. The correlation between tree density and pasture condition was not linear, indicating a threshold in...
  8. The development of veld assessment in the northern Transvaal savanna I. Red Turfveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Grazing‐induced gradients in pasture species composition were characterized for the red turfveld of the Northern Transvaal savanna. A proposed classification of pasture species response to grazing was developed and the influence of state variables and driving forces other than grazing...
  9. The development of veld assessment in the northern Transvaal savanna II. Mixed bushveld

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Differences in pasture species composition as a consequence of grazing were used to develop a proposed classification of pasture species response to grazing, for both the Combretum apiculatum and the Acacia tortilis communities of the northern Transvaal mixed bushveld. The...
  10. Influence of intensive irrigation and cultivation on selected soil properties: Arid southern Namibia

    Influence of intensive irrigation and cultivation on selected soil properties: Arid southern Namibia

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of long-term (25 years) intensive irrigation on selected soil properties of the Hardap Irrigation Scheme was determined by comparing soil profiles in irrigated and adjacent non-irrigated areas. The major differences detected between five soil pairs were rubification of...