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Friday, April 27, 2012
7:00 PM - 9:00 PM

Arbor Day forest lecture at Holden Arboretum

Turnover in Eastern Old-growth Forests: Natural and Novel Processes

James Runkle, PhD, professor at Wright State University studies the processes by which eastern old-growth forests maintain their species composition and appearance. Trees die but the forests often seem to change little for long time periods. In many of our forests trees die singly or in small groups forming gaps in the canopy. Their replacements come up in these gaps. How balanced are the patterns of death and the patterns of regrowth? In 30 plus years of studying this question in several different forests of the East, including The Holden Arboretum, he has found some places where forest properties are consistent over time while in others they show changes. An increasingly important factor affecting natural processes is the increase of several tree pathogens brought to this country over the last century. Some of those impacts will be discussed.

Turnover in Eastern Old-growth Forests: Natural and Novel Processes James Runkle, PhD, professor at Wright State University studies the processes by which eastern old-growth forests maintain their species composition and appearance. Trees die but the forests often seem to change little for long time periods. In many of our forests trees die singly or in small groups forming gaps in the canopy. Their replacements come up in these gaps. How balanced are the patterns of death and the patterns of regrowth? In 30 plus years of studying this question in several different forests of the East, including The Holden Arboretum, he has found some places where forest properties are consistent over time while in others they show changes. An increasingly important factor affecting natural processes is the increase of several tree pathogens brought to this country over the last century. Some of those impacts will be discussed.

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