Pollution in an ocean ecosystem has caused a significant drop in sea otter population. Within a year, scientists monitoring the ecosystem note that the sea urchin population on which the otters feed has greatly increased. The prevalence of sea urchins has caused the kelp and algae populations on which the urchins feed to decrease. The scientists fear the urchins will also begin to overwhelm the ecosystem's fragile coral population. Which species is most likely the keystone species in the ecosystem?

Algae
Coral
Sea otters
Sea urchin

Answers

Answer 1

Sea otters species is most likely the keystone species in the ecosystem.

What are sea otters?

The northern and eastern coastlines of the North Pacific Ocean are home to the sea otter (Enhydra lutris), a marine mammal. Although they are among the smallest marine animals, sea otters are the biggest members of the weasel family, often weighing between 14 and 45 kg (30 and 100 lb) as adults. The sea otter has the densest coat of fur in the animal kingdom, making it different from most marine animals in that it uses it as its main means of insulation. The sea otter can live only in the ocean, despite the fact that it can walk on land. The sea otter lives in areas close to the shore, where it forages by diving to the ocean floor. It mostly preys on fish species as well as numerous mollusks, crustaceans, and marine invertebrates like sea urchins.

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Related Questions

Which of the following is not true about theme? A Theme can be applied to our own lives. B There can be multiple themes in a story. C Theme is the main idea of a story. D Story elements like setting and conflict help develop theme.

Answers

Answer:

The correct answer is C. C is not true because main idea and theme are two different things. The main idea is what the book is about, or the topic. Theme is the lesson, or moral.

Explanation:

(a) What is the historical context of the speech? Your response should be 1-2 sentences in length.

(b) What events does it reflect? Your response should be 1-2 sentences in length.

(c) What intentions for Reconstruction does it reveal? Your response should be 2-3 sentences in length.

Excerpt from President Abraham Lincoln's Second Inaugural Address, 1865
If we shall suppose that American Slavery is one of those offences which, in the providence of God, must needs come, but which, having continued through His appointed time, He now wills to remove, and that He gives to both North and South, this terrible war, as the woe due to those by whom the offence came, shall we discern therein any departure from those divine attributes which the believers in a Living God always ascribe to Him? Fondly do we hope—fervently do we pray—that this mighty scourge of war may speedily pass away. Yet, if God wills that it continue, until all the wealth piled by the bond-man's two hundred and fifty years of unrequited toil shall be sunk, and until every drop of blood drawn with the lash, shall be paid by another drawn with the sword, as was said three thousand years ago, so still it must be said "the judgments of the Lord, are true and righteous altogether."

With malice toward none; with charity for all; with firmness in the right, as God gives us to see the right, let us strive on to finish the work we are in; to bind up the nation's wounds; to care for him who shall have borne the battle, and for his widow, and his orphan—to do all which may achieve and cherish a just, and a lasting peace, among ourselves, and with all nations.

Answers

In his second inaugural address, Abraham Lincoln provided a first draft of history, portraying the Civil War as a fight for union that ultimately evolved into a spiritual exercise in atonement for the nation's 250-year legacy of slavery.

What message does Lincoln convey in his Second Inaugural Address from 1865?

The Second Inaugural Address of President Lincoln was given on March 4, 1865. He urged people to work toward a durable peace and to "stitch up the nation's wounds" left by the Civil War in his speech.

What was said in this speech by Lincoln regarding slavery?

Politically and morally, I believe that slavery is terrible. I would prefer that it not continue to spread throughout the United States, but I wouldn't mind if it gradually stopped in the entire Union.

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