According to this video, how do sea otters affect the sea urchin population?
a. They cause it to decrease, preventing destruction of the kelp population.
b. They cause it to increase, preventing destruction of the sea star population.
c. They cause it to increase, resulting in a decrease in the sea star population.
d. They cause it to decrease, resulting in a decrease in the kelp population.
2. Why are otters considered a keystone species?
a. Their removal from the population would have relatively little effect on biodiversity.
b. They are large species that are easily noticed in the population, unlike smaller and cryptic species.
c. They are active predators that help maintain diversity by affecting the sea urchin and kelp populations.
d. They interact very specifically with sea urchins and not with a wide range of other species, making them especially important for sea urchin management.
3. The video also discusses the role of sunflower stars in the community. What do you predict would be the most likely outcome if the sunflower star population increased dramatically?
a. The number of sea otters would drop.
b. The amount of kelp would decrease.
c. The number of sea urchins would drop. Energy flows from microscopic algae to sessile invertebrates to crabs to sea otters.
d. The amount of abalone would increase. Energy flows from kelp to microscopic algae to sea stars to crabs to otters.
4. Based on the information given in the video, how do you predict that a dramatic increase in the sea otter population would affect the kelp population?
a. The kelp population would increase because fewer large fish would be available to consume it.
b. The kelp population would increase because fewer sea urchins would be present to consume it.
c. The kelp population would decrease because more sunflower stars would be available to consume it.
d. The kelp population would decrease because more sea urchins would be present to consume it.
5. The video discussed the effects of the removal of sea otters on the system. What do you predict would be the most likely effect if you removed abalone instead?
a. There would be a decrease in sea otter populations.
b. There would be an increase in sea otter populations.
c. There would be an increase in octopus populations.
d. There would be a decrease in kelp.
1. a. They cause it to decrease, preventing destruction of the kelp population.
2. c. They are active predators that help maintain diversity by affecting the sea urchin and kelp populations.
3. b. The amount of kelp would decrease.
4. b. The kelp population would increase because fewer sea urchins would be present to consume it.
5. d. There would be a decrease in kelp.
1. According to the video, sea otters affect the sea urchin population by causing it to decrease, preventing destruction of the kelp population. The correct answer is (a).
2. Otters are considered a keystone species because they are active predators that help maintain diversity by affecting the sea urchin and kelp populations. The correct answer is (c).
3. If the sunflower star population increased dramatically, the most likely outcome predicted in the video is that the number of sea urchins would drop. Energy flows from microscopic algae to sessile invertebrates to crabs to sea otters. The correct answer is (c).
4. Based on the information given in the video, a dramatic increase in the sea otter population would most likely affect the kelp population by causing it to increase because fewer sea urchins would be present to consume it. The correct answer is (b).
5. If abalone were removed from the system, the most likely effect predicted in the video is that there would be a decrease in kelp. The correct answer is (d).
1. According to the video, sea otters affect the sea urchin population by causing it to decrease, preventing destruction of the kelp population. Therefore, the correct answer is (a) They cause it to decrease, preventing destruction of the kelp population.
To get this answer, you should watch the video and pay attention to the information provided about sea otters and their impact on the sea urchin population and the kelp population.
2. Otters are considered a keystone species because they are active predators that help maintain diversity by affecting the sea urchin and kelp populations. Therefore, the correct answer is (c) They are active predators that help maintain diversity by affecting the sea urchin and kelp populations.
To determine this, you should understand the concept of a keystone species and its role in maintaining biodiversity. You should also pay attention to the information provided in the video about otters and their impact on the ecosystem.
3. The most likely outcome if the sunflower star population increased dramatically would be that the number of sea urchins would drop. Therefore, the correct answer is (c) The number of sea urchins would drop. Energy flows from microscopic algae to sessile invertebrates to crabs to sea otters.
To determine this, you should consider the information provided in the video about the role of sunflower stars and their interactions with the sea urchin population.
4. Based on the information given in the video, a dramatic increase in the sea otter population would likely result in the kelp population increasing because fewer sea urchins would be present to consume it. Therefore, the correct answer is (b) The kelp population would increase because fewer sea urchins would be present to consume it.
To determine this, you should pay attention to the information provided in the video about the relationship between sea otters, sea urchins, and the kelp population.
5. If you removed abalone from the system, the most likely effect would be a decrease in kelp. Therefore, the correct answer is (d) There would be a decrease in kelp.
To determine this, you should consider the information provided in the video about the role of abalone and its impact on the kelp population.