Croissance et auto-entretien d'une population de Ronce (Rubus fruticosusL.) dans les conditions d'une hêtraie

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Abstract
The growth of a blackberry population under a breech grove is a continual self-maintaining process due to the supply of new seedlings from its better lighted places. Density influences biomass and mortality. The population remains active through the assimilating efficiency of erect and half-arched stems providing the stock with storage substances. The layering power of arched stems extends the population and replaces dying stock. Under reduced light, an immediate phenotypic adapatation induces an increase of leaf area.