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Unformatted text preview: 1 RAM 382 Spring 2008 First Exam 100 points 26 February 2008 Name:____ ANSWERS _______________________________ 1. We discussed three general reasons for distinguishing different plant communities. One reason was to improve our aesthetic appreciation of the world around us. Give one of the two additional reasons. (4 points) utilitarian goals for managing resources or communication reasons 2. In its most simple form, a plant community is a group of species growing together. However, we also strive to categorize these groups of co-occurring species into types of communities based on four general characteristics. One of those characteristics is composition. Use composition to distinguish the Hot Desert from the Desert Grassland communities by listing two common species (either genus and species, or common name) for the separate communities (8 pts) Hot Desert: Desert Grassland Species: 3. We use structural and functional attributes to describe and compare communities. We can measure the biomass of each species in a community as a way of describing that community and comparing it to other communities. We can use biomass as either a structural or functional attribute of the community. What is the major difference in the way we measure biomass if we are describing community structure compared to describing community function? (6 points) Structure: biomass measured at one point in time Function: biomass measured at least two points in time and the change between those dates is the functional attribute 4. Ideas about the organization of plant communities are often based on the spatial association of species. Refer to drawings A and B below to answer the following questions. Which drawing best represents the Keystone Model of community organization? (4 points) Drawing B Label the curve in Keystone Model drawing that best represents the keystone species? (2 points) In drawing B, the species that has the broadest distribution, occurring where each of the other 3 species occurs....
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This test prep was uploaded on 04/03/2008 for the course RAM 382 taught by Professor Mcclaran during the Spring '07 term at University of Arizona- Tucson.
- Spring '07