A healthy Eastern hemlock forest. Pencil on drafting film, colored digitally. 2014
The devastating effect of the invasive hemlock woolly adelgid on a stand of Eastern hemlocks. Pencil on drafting film, colored digitally. 2014
Yearly cycle of Eastern hemlock tree with invasive insect, hemlock woolly adelgid. Pencil on drafting film, colored digitally. 2014
Seasonal changes of the invasive Oriental bittersweet vine. Detail of flowers (male vs. female) and Blue Jay eating berries in winter. Pencil on drafting film, colored digitally. 2014
Oriental bittersweet vines, climbing and smothering a tree. Pencil on drafting film, colored digitally. 2014
The effects of an earthworm invasion on a Northern hardwood forest. Before (left) and after (right). Pencil on drafting film, colored digitally. 2014
Identification and comparison of two species of invasive earthworms. Pencil on drafting film, colored digitally. 2014
Soil cross-section in a Northern hardwood forest. A variety of invertebrates, amphibians, and a thick layer of leaf litter indicate a healthy ecosystem. Pencil on drafting film, colored digitally. 2014
