Roosting areas in buildings of any height are the fundamental niche of species 1. 2. interspecific competition between the two bat species occurs because both species prefer the same roosting areas. 3. in parts of the city with only tall buildings (over two stories), competitive exclusion of species 1 may occur. 4. roosting areas in buildings that are one to two stories tall are the realized niche of species 1 when species 2 is present. 5. the change in the roosting habits of species 1 after species 2 became established in the city is an example of resource partitioning. 6. the competition between the species for roosting areas is an example of a intraspecific competition interaction. 7. the changes in the eyes of species 1 are examples of character displacement.