Tree Mob™! Mechanisms of Mortality: Dwarf Mistletoe along the Maine Coast

by Pam Thompson, Manager of Adult Education
November 4, 2016

Eastern dwarf mistletoe

Tree Mob™! Mechanisms of Mortality: Dwarf Mistletoe along the Maine Coast

Eastern dwarf mistletoe (Arceuthobium pusillum), a diminutive plant parasite, can fell a mature white spruce (Picea glauca) in a matter of years. Drawing upon observations at scales from hormone metabolism through whole-tree growth, Barry Logan, a Visiting Scholar from Bowdoin College, proposes a causal chain of events leading to white spruce decline. He relates the present-day ecophysiology of coastal Maine spruce stands to patterns of 19th century land use with relevance to the New England region. Meet at Accession # 611-93*A, Picea glauca, on Monday, November 7, at 2:30pm to learn more about this parasitic relationship.

Parking: Park along Bussey Street (keep tires off the sidewalk) and enter through Bussey Street Gate. Turn left to walk up Conifer Path. Cross over the Bussey Brook and turn right to walk east along the north side of Bussey Brook. Signs will be posted.

Public Transportation: Take the MBTA Orange Line to Forest Hills. At the upper level of the station, cross Washington Street and walk left to the Arboretum’s Washington Street Gate. Follow Blackwell Footpath to South Street. Cross South Street and re-enter the Arboretum. Walk to the intersection and turn left on Hemlock Hill Road. Follow the signs indicating where to cross Bussey Brook and then head west to the meeting location.

See map for gate locations and pathways.

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