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Friday, October 24, 2008
7:00 PM - 9:00 PM

Sugar maple decline and smog

Lecture on the decline of sugar maple trees in the northeastern U.S. and links to air pollution by Holden Arboretum's Mary Topa.

Acer saccharum (sugar maple) is a keystone species in many forests of Northeastern and Midwestern United States, and Eastern Canada. Although recent surveys have shown that Acer saccharum is generally healthy throughout its range, sporadic declines have occurred during the last four decades in Ontario and Quebec, Wisconsin, Vermont, New York and Pennsylvania, and fewer seedlings appear to be maturing to adulthood. Topa, Holden's director of research, will discuss potential causes of decline in urban trees, sugar bushes and forests, and why some forests are more susceptible than others. There will be light refreshments and time to speak with. Topa after the lecture. Registration requested.

More information.

Lecture on the decline of sugar maple trees in the northeastern U.S. and links to air pollution by Holden Arboretum's Mary Topa. Acer saccharum (sugar maple) is a keystone species in many forests of Northeastern and Midwestern United States, and Eastern Canada. Although recent surveys have shown that Acer saccharum is generally healthy throughout its range, sporadic declines have occurred during the last four decades in Ontario and Quebec, Wisconsin, Vermont, New York and Pennsylvania, and fewer seedlings appear to be maturing to adulthood. Topa, Holden's director of research, will discuss potential causes of decline in urban trees, sugar bushes and forests, and why some forests are more susceptible than others. There will be light refreshments and time to speak with. Topa after the lecture. Registration requested. More information.

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