1) Part 1) Explore the lists of endangered species at the bottom of this Link (Links to an external site

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1) Part 1) Explore the lists of endangered species at the bottom of this Link (Links to an external site.). Choose one species and in four sentences describe the species, giving a brief history of why it is endangered, and why you choose this specific species. Why did it stick out to you? Include a picture of the species as well as its scientific name.

2. question 2 is in PDF

3. tell us your favorite animal fact that you have learned this semester, and why that animal struck a cord with you.

The Impact of an Individual Species 5.2 The Impact of an Individual Species Start Assignment Due Monday by 5pm Points 8 Submitting a text entry box or a file upload Available Apr 25 at 12am - May 14 at 11:59pm 20 days Watch the video below. How Wolves Change Rivers https://sdsu.instructure.com/courses/45915/assignments/314203?module_item_id=894575 1/5 5/10/2021 5.2 The Impact of an Individual Species Question 1) What is a trophic cascade? Use the information from the video and figure above (Source (https://extension.colostate.edu/topic-areas/people-predators/ecological-effects-of-wolves-8-005/) ) Question 2) The Predator-Prey Simulation: Follow this link to an interactive simulation of wolf and moose populations Activity (https://insightmaker.com/insight/2068/Isle-Royale-Predator-Prey-Interactions) . You can change the values to learn how predator population and prey populations are deeply intertwined. Use your mouse to change the values of the predator and prey populations, or time that the simulation will run. Play around with the values in any way that you wish, but pay attention to the relationship between the number of wolves and moose over time. Step 1) To get you started, change the simulation length to 100 in the settings tab. https://sdsu.instructure.com/courses/45915/assignments/314203?module_item_id=894575 2/5 5/10/2021 5.2 The Impact of an Individual Species Step 2) Based on the following 4 scenarios below, adjust the initial population size for both wolf and moose population and hit 'simulate' at the top left of the page to view the graph. This graph will measure the moose and wolf population as a function of time. Record your observations for each scenario. Describe what happens to each of the scenarios bellow. https://sdsu.instructure.com/courses/45915/assignments/314203?module_item_id=894575 3/5 5/10/2021 5.2 The Impact of an Individual Species a) Set the wolf population to 20, and the moose population to 400 b) Decrease the moose population to 0, while leaving the wolf population at 20 c)Set the wolf population to 20, and moose population to 50 d)Set the moose population to 20, and wolf population to 50 e) What general trends did you see? How would you describe the shape of the curves (the lines) of the predator and prey populations? Question 3) A keystone species is a species that is critical to the survival of an ecosystem. Unfortunately, many species over the last century have been entirely removed from their historic ranges. The historic range of the Grey Wolf used to be two thirds of the United States, but has been restricted to the mid-west, Upper Rockies, and parts of the Pacific Northwest. The brown bear (Ursus arctos), another keystone species known for its iconic placement of the Flag of California, has lost much of its historic range. The Grizzly bear used to be found across southern California, including San Diego county. https://sdsu.instructure.com/courses/45915/assignments/314203?module_item_id=894575 4/5 5/10/2021 5.2 The Impact of an Individual Species Several conservation groups are attempting to reintroduce brown bears and wolves to California (Source (https://www.discovermagazine.com/planet-earth/grizzly-bears-might-return-to-california-is-the- state-ready) ). Although these efforts are not focused on reintroducing them to southern California, do you think this is a wise decision? Why or why not? What do you think the implication's of this are for the health of California's ecosystems?