Polar bears live on the ice cap near the North Pole. Their numbers aredwindling, apparently because of both pollution and global climatechange. List some specific ways that the melting of the Arctic ice capmight affect polar bear populations.
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Polar bears live on the ice cap near the North Pole. Their numbers are
dwindling, apparently because of both pollution and global climate
change. List some specific ways that the melting of the Arctic ice cap
might affect polar bear populations.
Step by step
Solved in 2 steps
- In addition to climate change, polar bears also face threats from pollution. Describe in two ways in which the polar bear population in the Arctic is affected by pollution. Give detailed explainations.If something happened in North America to decrease the wolf population, how would this affect the deer population? how would the graph from (e) change?A southern European songbird, the blue tit, breeds in two habitats that differ greatly in quality.In deciduous oak forests, blue tits produce so many young that their populations have thepotential of growing at the astronomical rate of 10% annually. In evergreen oak habitats, blue titsperform poorly, with populations showing a potential for a rapid decline of 13% annually. Yetblue tits persist in both habitats. Why?
- The graph below shows changes in the size of an Emperorpenguin population in terms of numbers of breeding pairson the island of Terre Adelie in the Antarctic. Scientistsused these data along with data on the penguins’ shrinking ice habitat to project a general decline in the island’sEmperor penguin population, to the point where theywill be endangered in 2100. Use the graph to answer thequestions on the right. What was the overall percentage decline in thepenguin population from 1975 to 2010?The long-leaf pine forest ecosystem once extended across 95 million acres of the southeastern US. However only 5 million acres now remain. This refers to a large reduction ina. the species rangeb a metapopulationc a mega populationIn the short term what willhappen to the levels aboveand below a population ofsecondary consumers of anumeric pyramid if a largenumber of individuals fromthis population dies?
- The Atlantic cod population is of primary economic importance to fishingcommunities throughout the maritime provinces in Canada. Unfortunately, thispopulation has underwent an extreme collapse in recent years due to overfishing.Some argue, however, that the collapse of the cod population may actually beattributed to an increase in the population of harp seals, a known predator ofcod. One suggestion to help cod stocks recover is therefore to permit the huntingof harp seals on a large scale. Suggest and explain one potentially negativeconsequence of limiting the harp seal population.How and why did the agricultural revolution affect humanpopulation size? How and why did the industrial revolutionaffect human population size? Explain what benefitsand what environmental impacts have resulted.Upland game hunters in Illinois have been noticing a decrease in therabbit and pheasant populations over the past five years. They havelobbied the Department of Natural Resources and the statelegislature to allow them to shoot red-tailed hawks, one of therabbit’s and pheasant’s main predators. Explain why shooting hawkswill not ultimately solve the problem of a decreased rabbit andpheasant population
- A species is considered to be endangered if it is expected to be extinct within 20years. A population of porpoise has approximately 1, 150 members alive today, and thepopulation has been steadily declining at an annual rate of about 36% over the pastdecade. In what year is the population expected to have only 1 individual left alive?Should this species of porpoise be considered endangered?What would happen to the moose population if the wolves were removed from the island? What happens to the population of wolf if the moose population will decrease? Identify 2 possible limiting factors that have influenced the wolf population?The long-leaf pine forest ecosystem once extended across 95 million acres of the southeastern US. However only 5 million acres now remain causing major declines in the Gopher tortoise population. Given this, what is expected to happen to overall diversity of species that depend on Gopher Tortoise burrows?a. increaseb. decreasec. stay the same