Biology 2200 Midterm 2 Questions and Verified Answers | Passed | A+

Using an example compare fundamental niche and realized niche of a species: : A species of mouse can live throughout throughout an area in Alberta because it has ideal temperature, but the species only live on the north side because their is not enough plants to hide them from predators. Fundamental niche is the range of abiotic conditions under which a species can persist Realized niche is the range of abiotic AND biotic conditions under which a species can persist Explain how the realized niche determines the geographic range of a species. : It determines all the places where abiotic and biotic conditions are within the range that the species can tolerate. For example a deer can tolerate temperature between -20 to +35 but, also needs lots of trees and grass as a food source. (can't live in a bare land with no food and ideal temperature) 2 The famous ecologist Joseph Connell studied populations of barnacles on the rocky shores of Scotland. He noticed that the smaller species, Chthamalus, only grew on the higher part of the rocks. The larger species, Balanus, only grew lower down on the rocks. He hypothesized that Chthamalus could survive lower down, but it is unable to spread downwards because it cannot compete with the larger Balanus. Design an experiment to test this hypothesis. Be sure to include the treatment, control, replication, randomization, what you will measure, and your prediction. : Treatment: Rocks on the shore where Balanus has been removed, and time has been allotted for Chthamalus to spread (if able). Have treatment groups not all together, but spread in between control groups along the shore. Control: Rocks on the shore where both Balanus and Chthamalus are both growing togethe