WORKSHEET #8 - COMMUNITY & ECOSYSTEM ECOLOGY a. If no great horned owls are present, barred owls will hunt prey in the air (e.g., bats, birds, flying insects) or in the trees (e.g., squirrels), in addition to prey on the ground (e.g., lizards, mice, rabbits, rats, shrews, & snakes). When great horned owls are present, however, barred owls spend most of their time hunting prey on the ground. The foraging behaviour of great horned owls is the same whether or not barred owls are present. Based on this information, use the graphs below to show the likely fundamental and realized niches of the two owl species, in terms of where the prey is found (meters above ground). Be sure to clearly indicate which curve belongs to which species. (4 marks) b. Of the two owl species, which one is mostly likely the stronger competitor? Briefly justify your answer. (2 marks) Continued on next page... UBC 2016W1-BIOL121-122 - NOT FOR RESALE 1. As part of your graduate studies, you monitored the natural diets of a number of great horned and barred owls at different locations. You then used these data to determine the fundamental niches of both of these species