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Predator and Prey K Coleman SQ • What would you like to know more about in population ecology? What are you lost on? Deer Activity (12-15 rounds) • 2 parallel lines: record number of deer at beginning and end of each round to graph later! • Count off in 4’s • #1: deer with their backs to other students – Choose what your looking for at beginning, signal • Other #’s: habitat component (food, shelter, water) with backs to deer – Choose what you are at beginning, hold sign • Run to what you need when I say “Go!” • Take what you need back to your line, it becomes a deer. If not taken, you continue as a component. • Any deer that fails, dies and becomes a component Graph your results and answer the following questions: • We’ve talked about graphs- which does yours resemble? Why is it an accurate or inaccurate depiction of that graph/reality? • Choose 3 terms in population ecology, and relate them to this activity. • How would you modify this game to result in another type of graph? Starting Question • Which relationships or interactions are the same between people and other animals? Which ones are different? Predation occurs when one organism captures and feeds on another organisms. The organism doing the eating is the predator and the organism being eaten is the prey. Predation is a driving factor in co-evolution. The prey evolves to better escape the predator. In turn the predator evolves to better capture the prey. Predator vs. Prey Game • You need to get the exact number of prey to survive! • http://srel.uga.edu/kidsdoscience/kidsdoscience-predator-game.htm • What would give predators the advantage? How about prey? Communities interact in a variety of different ways that enable the organisms within them to establish a niche and shape the ecosystem in which they live. The following are types of interactions within communities: The term symbiosis means "living together." When two species live closely together they are said to be in a symbiotic relationship. There are three main categories of symbiotic relationships: Mutualism Commensalism Parasitism In mutualism, both species benefit from the relationship. In this example, the flower provides the hummingbird with nectar and the hummingbird helps the flower reproduce by transporting pollen from one flower to the next. Mutualism: a win/win situation In commensalism, one species benefits from the relationship while the other is neither helped nor harmed by it. In parasitism, one organism lives on or inside another organism and harms it. Parasites are organisms that obtain all or most of their nutrients from other organisms, called hosts. The host-parasite relationship benefits the parasite at the cost of the host. Tapeworms live in the intestines of mammals and "steal" nutrients from them. This is an example of a. b. c. d. Competition Mutualism Commensalism Parasitism E. coli live in the human colon where they absorb nutrients and produce vitamin K and sodium that benefit their human hosts. This is an example of a. b. c. d. Competition Mutualism Commensalism Parasitism A relationship in which one organism is helped and another organism is neither helped nor hurt is called a. b. c. d. Competition Mutualism Commensalism Parasitism A relationship in which one organism is helped and another organism is neither helped nor hurt is called a. b. c. d. Competition Mutualism Commensalism Parasitism Which of the following types of community interactions leads to coevolution? a. b. c. d. Predation Mutualism Parasitism All of the above Community charades • With a partner or group of 3, choose organisms and demonstrate the relationship between them – Parasitism – Mutualism – Commensalism – Predation • Act it out, but you can’t speak! We will guess!