Reintroducing the gray wolf as a keystone species to Yellowstone National Park has resulted in all of the following EXCEPT: Question 20 options: - More aspen trees along waterways - Better habitat for nesting songbirds
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Reintroducing the gray wolf as a keystone species to Yellowstone National Park has resulted in all of the following EXCEPT:
Question 20 options:
- More aspen trees along waterways
- Better habitat for nesting songbirds
- Significant losses of cattle and sheep herds in ranches near the park
- Larger small mammal populations
- Population regulation of herds of elk, moose and deer
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- In this question, why B is correct and C is wrong? Bighorn sheep are an iconic species in the western United States, however, their population size is drastically lower than it once was historically. These sheep inhabit montane patches surrounded by urban and agricultural landscapes. Accordingly, bighorn sheep can be considered a metapopulation. Wildlife managers would like to increase the patch occupancy of bighorn sheep. Which of the following would be the most effective conservation/restoration strategy? None of these statements is an effective conservation strategy. Increase patch size and quality, and decrease the distance between patches. Increase patch size and the distance between patches, and decrease patch quality. Increase the distance between patches and patchy quality, and decrease patch size. Decrease patch size, distance between patches, and patch quality.Mule Deer Use the passage to answer the question. This image shows a male mule deer (Odocoileus hemionus), which is native to western North America. Named for their large ears, mule deer are hunted for sport and food under strict management practices, such as designated hunting seasons and limits on how many deer a hunter can take. A) In a short paragraph, propose a hypothesis to test the effect of a zoned reserve on mule deer populations. Justify your hypothesis based on your knowledge of zoned reserves. B) In 1-2 short paragraphs, outline a field experiment to test your hypothesis on the effect of a zoned reserve on mule deer populations. Describe your control group, experimental group, and the data you would collect. Identify at least two environmental factors that could affect your data collection and how you would address them, if possible.Agricultural practices can pose a challenge to survival of native species Question 3 options: True False
- QUESTION 20 Reintroduction of the wolf eventually reduced attacks on domestic cattle by what other species? a. Fox b. Local wild dogs c. Grizzly bear d. Golden eagle e. CoyoteWhich of the following situations could decrease the average fitness of a population? Question 9 options: Snakes in a small and isolated populations must breed with blood-relatives. A sudden forest fire kills 95% of a population of minks, leaving behind the remaining 5% to repopulate the area. Seeds dispersed by wind arrive on an island, germinate and begin breeding with the existing island population. Atlantic salmons adapted to live in captivity escape from a fish farm and breed with wild stocks. All are the listed situations could lead to a decrease in average fitnessZebra mussels are an aquatic invasive species that are threatening the diversity and abundance of native species in the lake ecosystems of Alberta. Sylvan Lake is a beautiful recreational lake located in central Alberta. It has a total area of 43 km2. If the population of zebra mussels is estimated to be 128 mussels/200 km2, calculate the size of the zebra mussel population in Sylvan Lake. Express your answer as a value rounded to one decimal place. Answer
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- Two populations of deer live in similar protected tracts of land. In tract A, the deer are left to forage on their own. In tract B, the villagers start providing supplemental food in the winter. What would you predict about the two populations after a few years and why? Draw a graph to show your predictionsWhich statments are correct? Question 25 options: Species diversity tends to increase with evapostranspiration Species diversity tends to increase with when parasitism is low Species diversity tends to increase with island area Species diversity tends to be higher when disturbance frequency is low Species diversity tends to increase with decreasing latitudeQuestion 6 In a coevolutionary arms race ____________. Question 6 options: A) selection favors equilibrium. B) each adaptation by one species negates selection on the other. C) each adaptation by one species leads to a new adaptation in the other. D) selection is stronger on the predator. Question 7 Optimal foraging theory suggests that ____________. Question 7 options: A) when handling time is long relative to search time, predators should be generalists. B) specialized diets are rare in nature. C) new items are added to the diet only if their handling time is larger than average. D) when search time is long relative to handling time, predators should be generalists.