Community Ecology and Distributional Spectra of Mediterranean Shrublands and Heathlands in Southern Spain

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Abstract
Community structure and distributional spectra of seveteen shrubland and heathland communities in Southern Spain were studied. Ordination analysis of species cover arranged samples according to two main environmental factors: soil acidity and topographical elevation. Distributional spectra of shrublands on basic soils were mainly composed of Circum- and West-Mediterranean species. However, towards higher elevations, the proportion of Iberian and Ibero-North African species increased. Heathlands on acid soils showed a higher proportion of Ibero-North African species. A negative relation was found between species richness and soil fertility. The infra-generic diversity increased towards higher altitudes. Relevance of 'seeder' versus 'sprouter' regeneration strategies is disscused for dominant species.

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