As part of the previous experiment, you monitor the growth of tree A (ants blocked from the canopy) and tree B (ants are not blocked from the canopy) over the three-year period. You expect __________ because _________
A. higher growth in tree A; the number of
aphids will fall because ants are absent, and
aphids are parasites of the tree
B. higher growth in tree B; the natural
environment is always optimized so any
change (e.g., blocking the ants from tree A)
will reduce the performance of all members of
the network
C. no change in growth; due to the size
difference between the trees and the insects,
the presence or absence of insects will not
have an effect on tree growth
A
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