VH increase in vegetation will cause increase in herbivores

V-->H increase in vegetation will cause increase in herbivores but not vice versa

V<--H means increase in herbivore will decrease vegetation but not vice versa

V<--> increase in vegetation will increase herbivore and an in crease in herbivore will reduce vegetation

1. Classify the following examples of plant-herbivore or predator prey interactions with V-. H V-H H models discussed on page 325 regard (a) Red squirrels feeding on the seeds in white spruce tree cones. (b) Eastern grey kangaroos feeding on pasture grass in semi-arid grasslands. (c) Blue whales feeding on krill in the Southern Ocean (d) Coyotes feeding on domestic sheep in Montana ranching areas (e) Wolves feeding on elk in Yellowstone National Park

Answers:

a) V --->H (As the white spruce tree cones (V) increases the red squirrels also increases (H) )

b) V<--- >H (An increase in pasture grass (V) will increase Eastern grey kangaroos (H) and an increase in herbivore will reduce vegetation)

c) V---->H (An increase in krill (V) will cause increase in Blue whale(H) but not vice versa)

d) V<---- H (An increase in Coyotes will decrease domestic sheep (V) but not vice versa)

e) V <---- H ((An increase in wolves(H) will decrease elk (V) but not vice versa)

V-->H increase in vegetation will cause increase in herbivores but not vice versa V<--H means increase in herbivore will decrease vegetation but not vice

VH increase in vegetation will cause increase in herbivores

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