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Open Access Publications from the University of California

Department of Plant Sciences

UC Davis

Regulation of nitrogen nutrition at the whole tree level: biotic interactions in the rhizosphere of European beech forests


Despite high N requirements for growth and development, many forest trees have developed at sites with low N availability that are characterized by a largely closed ecosystem N cycle. Under such conditions trees have to compete with other organisms for the limited amount of N present. The competitors include the soil microflora, the natural regeneration, other understorey species, as well as competing tree species. In this contribution mechanisms of these competitive interactions are discussed in beech-dominated, deciduous forests that constitute the potential natural vegetation of Central Europe.

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