1. What type of birds showed a noticeable decrease in density with an increase in Lumbricus biomass within the maple-basswood forest?
A. Hermit Thrush
D. Black and White Warbler
2. Invasion by the worm, Lumbricus, increases the dominance of the following type of foliage:
A. Sedges and grasses
B. Herbaceous plants
C. None of the above
D. All of the above
3. True or False: All of the birds in the study were ground-nesting, song birds?
4. Which of these are a current hypothesis as to how the Lumbricus worm detrimentally effects the density of Ovenbirds in the maple-basswood forest?
I. Help with aeration and fertilization of the ground
II. They caused habit changes that reduced nest concealment
III. They reduced the amount of arthropod food supplies
IV. Ovenbirds perceive forests infested with Lumbricus undesirable and choose to live elsewhere
A. I, II, & III
B. I & III
C. II & III
D. II, III, & IV
E. All of the above
5. Lumbricus is originally found in:
D. North America