The Interaction of Pinon Pine and Gambel Oak in Plant Succession near Dolores, Colorado

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Abstract
P. edulis (pinon pine) and Q. gambelii (Gambel oak) near Dolores, Colorado, coexist in successional sequence leading to woodland regeneration. The germination of seeds and the establishment of seedlings of P. edulis are enhanced under an oak canopy. In a mature pinon woodland, oak exists as scattered understory, and pinon individuals of less than 10-cm diameters constitute 45% of the population. In contrast, 75% of the pinones have diameters less than 10 cm in a stand which is invading an oak-dominated habitat. Near Dolores, Colorado, the oak stand is viewed as successional, leading to a pinon woodland.

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