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EQ: How does a keystone species impact the ecosystem? Key questions: After this web quest, you should be able to devise a creative and informative answer for each of these questions. 1) How can you identify an organism being a keystone species in a particular environment? By understanding the niche of an organism, scientist can identify how one species can affect stability of an environment. 2) What does the Keystone Species Hypothesis state, who formulated this hypothesis and why is it important today? http://www.washington.edu/research/pathbreakers/1969g.html 3) What are some examples of keystone species and how does each affect their surrounding environment? 4) What is the niche of each keystone species? Is it an herbivore, carnivore, omnivore, predator or prey? Describe how it gains biomass? 5) Describe the fate of the Dodo bird. How did it become extinct? How did the extinction affect the ecosystem one hundred years later? What does extirpate mean? Keystone Species affect on an Ecosystem Objective: You are a Park Ranger who just received a job at a National Park. You are unfamiliar with the terrain (shape of the land). Also, you do not understand how the organisms living within the park interact with each other. Scientists and tourists coming to the National Park are going to be asking you questions like: Why is the Prairie Dog important to Wind Cave National Park? You will need to do some research to understand the species and how important these keystone species are to the park. Instruction: Look up the following websites to examine the niche (role) an organism plays in an ecosystem of that particular place. Some species may be extinct. In addition, you may need to visit several sites to gain specialized information about the demographics of that organism (please add the URL address of where you found this information). Like you did with the barn owl, jot down important characteristics about the organism that may help you to understand why it is important in the ecosystem. You may want to search Google with something like: Elephant as a keystone species in Kenya National Wildlife Preserve… Keystone Species Data Collection Form (Please place answers in a different readable color) Species common name: Prairie Dog http://www.prairiedogs.org/keystone.html World status: _______________________________________________ Scientific Name:__________________________________________________ Physical Characteristics: ___________________________________________ Biome: ________________________________________________ K1: How does the Prairie Dog impact the ecosystem? K2: What are some of the implications that would happen if the Prairie Dog was extirpated from this environment? K3. Insert a picture of the animal and a map of a national park where Prairie Dogs are found? (resize to a thumb nail picture) Species common name: Elephant http://www.fieldtripearth.org/article.xml?id=754 World status: __________________________________ Scientific Name:___________________________________________________ Physical Characteristics: ___________________________________________ Biome: ________________________________________________ K1: How does the elephant impact the grassland ecosystem? K2: What are some of the implications that would happen if the elephant was extirpated from this environment? K3. Insert a picture of the animal and a map of a national park where elephants are found? (resize to a thumb nail picture) Species common name: Dodo Bird http://www.bagheera.com/inthewild/spot_spkey.htm World status:________________________________________ Scientific Name:___________________________________________________ Physical Characteristics: ___________________________________________ Biome: ________________________________________________ K1: How does the Dodo birdt impact the ecosystem? K2: What are some of the implications that would happen when the Dodo was extirpated from this environment? K3. Insert map of where Dodo were found? (resize to a thumb nail picture) Your turn: Find a keystone organism (can be a plant) Species common name: ___________________________ URL: ____________________________________________ World status:________________________________________ Scientific Name:___________________________________________________ Physical Characteristics: ___________________________________________ Biome: ________________________________________________ K1: How does the __________________ impact the ecosystem? K2: What are some of the implications that would happen if the _________________was extirpated from this environment? K3: What does extirpate mean? K4. Insert map of a park where ________________________ are found? (resize to a thumb nail picture) Due: Please email or Print and give to me Friday Oct 23rd at the end of class.