Articles by Keyword: High Altitude

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  1. Cold tolerant eucalypts in South Africa—Growth information for informed site-species matching in SA

    Cold tolerant eucalypts in South Africa—Growth information for informed site-species matching in SA

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    Site-species matching is very important in managing the various limiting site and climatic factors in the more temperate forestry areas in South Africa. Information has been gathered from ICFR site-species interaction trials and provenance/progeny trials and summarised into a format...
  2. Cryptic variation in the Moroccan high altitude lizard <em>Atlantolacerta andreanskyi</em> (Squamata: Lacertidae)

    Cryptic variation in the Moroccan high altitude lizard <em>Atlantolacerta andreanskyi</em> (Squamata: Lacertidae)

    Item type: Journal Article • Journal: African Journal of Herpetology
    Atlantolacerta andreanskyi is a mountain specialist lacertid lizard, restricted to areas above 2400 m of the High Atlas Mountains of Morocco, with apparently no geographic connection between different populations. In a recent molecular study, populations from A. andreanskyi collected across...
  3. The rediscovery of a lost frog: <em>Arthroleptis troglodytes</em> Poynton, 1963

    The rediscovery of a lost frog: <em>Arthroleptis troglodytes</em> Poynton, 1963

    Item type: Journal Article • Journal: African Zoology
    The cave squeaker Arthroleptis troglodytes Poynton, 1963 was first collected in 1961/62, and not observed again for 54 years despite several attempts to locate it. We rediscovered this species near the type locality in the Chimanimani mountain range in eastern...
  4. Improving the isolation of actinomycetes from soil by high-speed homogenization

    Improving the isolation of actinomycetes from soil by high-speed homogenization

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Quantitative isolation of actinomycetes from five South African soils with different physical and chemical properties was conducted by hammer-mill comminution followed by high-speed liquid homogenization of resultant soil particles using a shaft homogenizer. Soil homogenates were serially diluted and plated...
  5. Phytochemical content, antioxidant capacity and physicochemical properties of pomegranate grown in different microclimates in South Africa

    Phytochemical content, antioxidant capacity and physicochemical properties of pomegranate grown in different microclimates in South Africa

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    We investigated the antioxidant and physicochemical properties of pomegranate (Punica granatum cv. Bhagwa) fruit grown in three microclimates in South Africa. The physicochemical properties of fruit peel and arils differed among the growing locations, including weight and redness color of...
  6. TOXIC CONCENTRATION OF FREE AMMONIA TO <em>BRACHIONUS CALYCIFLORUS</em> PALLAS, A ROTIFER PEST SPECIES FOUND IN HIGH RATE ALGAL PONDS (HRAP's)

    TOXIC CONCENTRATION OF FREE AMMONIA TO <em>BRACHIONUS CALYCIFLORUS</em> PALLAS, A ROTIFER PEST SPECIES FOUND IN HIGH RATE ALGAL PONDS (HRAP's)

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    Laboratory tests on Brachionus calyciflorus Pallas indicate that at low concentrations of free ammonia (< 7 mg l −1) pH levels up to 9,85 could be tolerated for 96 h without apparent ill effect. Free ammonia concentrations > 14,4 mg...
  7. COUNTING NATURAL POPULATIONS OF <em>MICROCYSTIS AERUGINOSA:</em> A SIMPLE METHOD FOR COLONY DISRUPTION INTO SINGLE CELLS AND ITS EFFECT ON CELL COUNTS OF OTHER SPECIES

    COUNTING NATURAL POPULATIONS OF <em>MICROCYSTIS AERUGINOSA:</em> A SIMPLE METHOD FOR COLONY DISRUPTION INTO SINGLE CELLS AND ITS EFFECT ON CELL COUNTS OF OTHER SPECIES

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    A rapid, high-speed blending method for disrupting colonies of the cyanobacterium Microcystis aeruginosa to single cells in preparation for cell counts is described. Cell counts obtained for treated samples of natural populations of M. aeruginosa from Hartbeespoort Dam did not...
  8. Impacts of non-selective grazing on cover, composition, and productivity of Nama-karoo grassy shrubland

    Impacts of non-selective grazing on cover, composition, and productivity of Nama-karoo grassy shrubland

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    The non-selective rotational grazing system has undergone a long and controversial development. The merits of this grazing system, where relatively large numbers of livestock are herded into numerous small paddocks for short timespans with long rests between grazings, have not...
  9. Home Brewed Alcohol use Among High School Students in a Rural South African Community

    Home Brewed Alcohol use Among High School Students in a Rural South African Community

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    This study investigates the use of home brewed alcoholic beverages among adolescents in high schools in a rural community in South Africa. There is much concern about alcohol misuse among young people and very little information exists on alcohol produced...
  10. Perceptions of High-risk Sex Among Men and Women Attending an STI Clinic in Cape Town, South Africa

    Perceptions of High-risk Sex Among Men and Women Attending an STI Clinic in Cape Town, South Africa

    Item type: Journal Article • Journal: Journal of Psychology in Africa
    The widespread occurrence of sexually transmitted infections (STI's) among young adults in South Africa suggests that there is a need to increase safe sex practices among those who are sexually active. Given the high rate of HIV infection in the...