Articles by Keyword: Indicator Species

Search results for Indicator Species

We found 334 results for you
  1. Site Indicator Species for Predicting Productivity of Pine Plantations in the Southern Cape

    Item type: Journal Article • Journal: South African Forestry Journal
    A means of predicting site potential for pine species in the Southern Cape based on 10 vegetation associations is presented.
  2. A comparison of some range condition assessment techniques used in southern African grasslands

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Techniques currently used to assess range condition in the grassland biome of southern Africa are reviewed. The methods were used to calculate range condition indices from fire‐climax and climatic‐climax grassland data. These indices were then used to evaluate each method...
  3. DIATOMS AS INDICATORS OF WATER QUALITY IN THE UPPER HENNOPS RIVER (Transvaal, South Africa)

    DIATOMS AS INDICATORS OF WATER QUALITY IN THE UPPER HENNOPS RIVER (Transvaal, South Africa)

    Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa
    The water quality of the upper Hennops River was determined by applying the method of Lange-Bertalot (1978; 1979), which is based on groups of diatom species with similar tolerances towards pollution. A definite improvement in the water quality was indicated...
  4. Soil and vegetation changes across a Succulent Karoo grazing gradient

    Soil and vegetation changes across a Succulent Karoo grazing gradient

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    This study describes soil and vegetation changes radiating out from a central watering point on a livestock farm in the Succulent Ceres Karoo (Tanqua). The aim was to identify possible relationships between long-term grazing pressure, and soil and vegetation properties...
  5. A degradation gradient for the assessment of rangeland condition of a semi-arid sourveld in southern Africa

    A degradation gradient for the assessment of rangeland condition of a semi-arid sourveld in southern Africa

    Item type: Journal Article • Journal: African Journal of Range & Forage Science
    Data collected between 1986/87 and 1999/2000 from a long-term rangeland monitoring project on three different sites were used to construct a degradation gradient in a semi-arid sour grassland of southern Africa. The degradation gradient was then used to quantify rangeland...
  6. A vegetation-based hierarchical classification for seasonally pulsed floodplains in the Okavango Delta, Botswana

    A vegetation-based hierarchical classification for seasonally pulsed floodplains in the Okavango Delta, Botswana

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    A classification scheme is presented for seasonal floodplains of the Boro-Xudum distributary of the Okavango Delta, Botswana. This distributary is subject to an annual flood-pulse, the inundated area varying from a mean low of 3 600 km2 to a mean...
  7. Gastropod diversity, distribution and abundance in habitats with and without anthropogenic disturbances in Lake Victoria, Kenya

    Gastropod diversity, distribution and abundance in habitats with and without anthropogenic disturbances in Lake Victoria, Kenya

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    We investigated freshwater gastropod diversity, abundance and distribution in habitats with and without anthropogenic disturbance in two localities, Ndere in the Winam Gulf and Mbita Point, Lake Victoria, Kenya, from May 2002 to January 2004. A total of 133 984...
  8. Spatial quality improvement of a toxic industrial effluent, based on physico-chemistry, algal community changes and algal bioassay

    Spatial quality improvement of a toxic industrial effluent, based on physico-chemistry, algal community changes and algal bioassay

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    Spatial recovery of a highly alkaline and ammonia-rich industrial effluent was assessed along a wastewater receiving drain near Mansoura City in 2006. Spatial changes in physico-chemical characteristics and water quality index indicated a progressive downstream improvement of wastewater quality, and...
  9. Application of a fish health assessment index and associated parasite index to <em>Clarias gariepinus</em> (Teleostei: Clariidae) in the Vaal River system, South Africa

    Application of a fish health assessment index and associated parasite index to <em>Clarias gariepinus</em> (Teleostei: Clariidae) in the Vaal River system, South Africa

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The aim of this study was to determine if the fish health assessment index (HAI) developed in the USA and associated parasite index (PI), when applied to Clarias gariepinus at two localities in the upper and middle Vaal River system,...
  10. Description and ecology of larvae of <em>Glossogobius callidus</em> and <em>Redigobius dewaali</em> (Gobiidae) from temperate South African estuaries

    Description and ecology of larvae of <em>Glossogobius callidus</em> and <em>Redigobius dewaali</em> (Gobiidae) from temperate South African estuaries

    Item type: Journal Article • Journal: African Zoology
    This paper describes the morphology and ecology of the larvae and early juveniles of two common gobiids in warm temperate South African estuaries. The early developmental stages of Glossogobius callidus and Redigobius dewaali were collected during plankton surveys in seven...