Gradual and Episodic Changes in the Structure of Rhus typhina Clones

growth rate suggested that these stems are in steady state or decline. Entire clones that survived during the study showed an increase in numbers of small, peripheral stems. Frost damage of all clones in spring 1986 was associated with release of a large cohort of new stems. Survivorship within this cohort was highest among peripheral stems; most new stems in clone interiors perished during the first growing season. Low-level disturbance stimulates a generalized, episodic release of new stems, but it is primarily the peripheral stems that contribute to long-term clone development.