Methods

Low-infestation hemlock forest plot location. First image shows greater Boston area, second image shows border between Dedham and Needham, third image shows Wilson Mountain Reservation, and fourth image shows low-infestation hemlock forest plot (L).

High-infestation hemlock forest plot location. First image shows greater Boston area, second image shows Milton and Blue Hills Reservation, third image shows Blue Hills Reservation by Unquity Road, and fourth image shows high-infestation hemlock forest plot (H).

In each of the two forest plots, cones were placed 10 feet apart to form a 50 by 50 foot grid. In areas where hemlock was not the dominant overstory species, no cone was placed.