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Integrative Forest Management Guidelines
P5-A2 Maintaining tree species diversity
Active management can maintain tree species diversity in mixed stands by regulating competition and promoting rare or less competitive species.
Introduction
Maintaining mixed-species forests may require tending operations, such as thinning, to regulate tree species composition throughout stand development. Without active management, differences in growth rates and competitive ability can cause a few species to dominate and others to disappear from the stand. Thinning can increase growing space and improve the survival of less competitive species and thus help maintain tree diversity. Particular attention should be given to rare or competitively inferior species that provide a potential for adaptation to climate change.