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Terrestrial Herbivores. Tansley and Adamson (1925)rabbit grazing on chalk grasslands in Britainhigh richness of herbaceous specieswith rabbit exclusion, woody species encroached and herbaceous species declinedrabbit populations crashed from Myxoma. Grazer Density Effects. high densities lead to reduced plant diversity and a community dominated by grazer-resistant speciesmoderate densities - positive impacts and mutualistic relationshipsMcNaughton (1979)

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