wcompt_13 - Assignment # 13. Competition (10 points) Name:...

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Assignment # 13. Competition (10 points) Name: Darin Kleinsmith Subject Link Grand Canyon Plants http://www6.nau.edu/bio/bio300/GCplants.htm USDA Plants Database http://plants.usda.gov/ Invasive Species http://www.invasive.org/ 1. Species are usually found associated in communities with other species. Pick an associated pair of plant species (scientific names and common names) in the Grand Canyon for which you can find the information to answer these questions? Yellow Starthistle, Centaurea solstitialis cheatgrass, Bromus tectorum 2. In the arid southwest, water is often a resource in short supply. When a needed resource is limiting, species either compete until one goes extinct (at least locally) or they adapt to each other and coexist? What characteristics do these two species have that might allow them to access water at different levels in the soil, at different times, in different places, or in different ways that they manage to persist in the same ecological community? Yellow starthistle has deep roots which it can penetrate deeper into soil than many other grasses. The cheat
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wcompt_13 - Assignment # 13. Competition (10 points) Name:...

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