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    Vegetation and soil processes in a small mountain catchment

    Brown, I. C.
    Abstract
    Variation in the soil pattern in a small first order catchment within the Torlesse Catchment, Porters Pass, was described. Both soil chemical and soil physical properties were recorded. The soils were described as Tekoa soils with the main elements of variation being due to the activities of the drift regime and to differences in soil moisture. The vegetation was described using a modified point-height method and the Braun-Blanquet cover-abundance method. Ordination and correlation analyses were conducted on all data. The point-height method gave an accurate picture of the structure of the vegetation while the Braun-Blanquet method was generally adequate for the ordination analysis. The principal environmental gradients determining species composition were soil maturity and soil drainage. The species distribution and site factors for 5 important species were described. Variation in the vegetation and the soils across a riparian area was analysed. The vegetation was recorded using the point-height method and the soil morphological features were described. Schoenus pauciflorus and Bulbinella angustifolia were useful specie s for distinguishing the riparian zone while soil mottle and gley features gave an indication of the extent of soil saturation. The concentrations in sheaths, green material and dead material and weight per tiller of P, N, K, Ca and Mg are reported for Festuca novae-zelandiae. These samples were taken from the sites upon which the previous vegetation and soil analysis had been undertaken. Species means were comparable to those reported by other authors. Few significant correlations between tussock nutrient levels and soil element concentrations were found although significant differences between sections of the tiller were shown.... [Show full abstract]
    Keywords
    vegetation; soil processes; mountain catchments; soil chemical properties; soil physical properties; Bulbinella angustifolia; Schoenus pauciflorus; soil saturation; land stability; riparian lands; tussock grasslands; Torlesse Stream
    Fields of Research
    070101 Agricultural Land Management; 050302 Land Capability and Soil Degradation; 060705 Plant Physiology
    Date
    1981
    Type
    Thesis
    Access Rights
    Digital thesis can be viewed by current staff and students of Lincoln University only. Print copy available for reading in Lincoln University Library.
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    • Theses and Dissertations with Restricted Access [2179]
    • Department of Agricultural Sciences [1398]
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