Browsing by Author "Mucina, L."

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    Frontiers of vegetation science : an evolutionary angle
    (International Association for Vegetation Science, 2008) Mucina, L.; Kalwij, J. M.; Smith, V. R.; Chytry, M.; White, P. S.; Cilliers, S. S.; Pillar, V. D.; Zobel, M.; Sun, I-F.
    The main focus of the symposium is to seek links between vegetation science and evolutionary biology and the formation of platforms in cooperation between these major scientific fields. The title of our meeting – “Frontiers of Vegetation Science—An Evolutionary Angle”– alludes symbolically to the challenges that vegetation science as a discipline is currently facing. Technologically driven progress in evolutionary research is changing the face of many traditional biological sciences. Vegetation science, should (and to some extent already does) react to this new phase of evolutionary research by reaching out to ecological disciplines traditionally closer to evolutionary biology (population biology, palaeo-ecology) and implementing tools of evolutionary research in explaining structure and dynamics of vegetation. The field of interaction and cooperation is enormous and is ripe for exploration and discovery. The major aim of our meeting is to extend the interface and to deepen the cooperation between the evolutionary research and vegetation science.
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    Vegetation of the coastal fynbos and rocky headlands south of George, South Africa
    (AOSIS, 2000) Hoare, D. B.; Victor, J. E.; Lubke, R. A.; Mucina, L.
    ommunity structure and composition of the coastal fynbos and rocky headland plant communities south of George, southern Cape, were studied. Vegetation was analysed using standard sampling procedures of the floristic-sociological approach of Braun-Blanquet. The releve data were subject to TWIN SPAN-based divisive classification, and ordinated by Principal Coordinates Analysis with the aim to identify vegetation coenocline subsequently interpreted in terms of under­lying environmental gradients. Most of the sampled vegetation was classified as coastal fynbos. The Leucadendron salignum-Tetraria cuspidata Fynbos Community was found to occupy sheltered habitats, whereas the Relhania calyci- na-Passerina vulgaris Fynbos Community was found in exposed habitats The other two communities characterise strong­ly exposed rocky headlands. The Pterocelastrus tricuspidatus-Ruschia tenella Community is wind-sheared scrub, and the Gazania rigens- Limonium scabrum Rocky Headland Community is a loose-canopy, low-grown herbland, characterised by the occurrence of partly salt-tolerant and succulent herbs. The ordination of the fynbos communities revealed a horseshoe structure allowing a direct recognition of a coenocline spanning two fynbos communities along the Axis 1 interpreted in terms of exposure to wind and salt spray. A considerable amount of alien plant infestation was also present. This appears to be the largest threat to the continued existence of this coastal fynbos.