Evaluation of woody plants' responses to grazing with the use of morphometric and genetic analysis methods
Abstract
The effects of different levels of grazing pressure by goats were examined on two dominant species of evergreen sclerophyllous shrublands, Olea europaea L. var oleaster, and Pistacia lentiscus L by morphometric analysis using developmental instability expressed as translational asymmetry, fluctuating asymmetry and fractal dimension as well as genetic analysis through isoenzymes. Levels of grazing pressure included heavy grazing and a control for genetic analysis as well as an additional level of light grazing for morphometric analysis. The translational asymmetry indices, fluctuating asymmetry indices and fractal dimension were also compared, along with the within plant variation, by taking measures on both parts, upper and lower, inaccessible and accessible by goats respectively, of O.europaea shrubs. O.europaea proved to be more stable when grazed. Although the lower grazed parts of the shrubs seemed to have more asymmetric leaves and less complex branches than the upper ones, they b ...
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