Which of the following does not directly affect the intensity of competition? Question 3 options: A) Niche overlap. B) Niche breadth. C) The density of competitors. D) The presence of similar species.
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Question 3
Which of the following does not directly affect the intensity of competition?
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Question 4
When disturbance is frequent, competition is often less intense.
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- Question 1 Question 1 options: ___________ competition occurs when one species reduces the resource available to the other. __________ competition occurs when one species reduces access to the resource. Question 2 Which of the following is not characteristic of interspecific competition? Question 2 options: A) Two or more species interact. B) The population size of at least one species decreases. C) The limiting resource does not change over time. D) One or more resources is limiting. Question 3 Which of the following does not directly affect the intensity of competition? Question 3 options: A) Niche overlap. B) Niche breadth. C) The density of competitors. D) The presence of similar species.Question 1 Neutral models emphasize dispersal and chance. Question 1 options: A) True B) False Question 2 Environmental filtering reduces competition. Question 2 options: A) True B) False Question 3 If competition structures a community, then ____________. Question 3 options: A) niches should be widely separated in niche space. B) niche space should be neutral. C) the environment does not filter species. D) there is no niche overlap among species.Competitive exclusion occurs under the following conditions: a. when fundamental niches overlap and competition is asymmetric b. when realized niches overlap and competition is asymmetric c. when fundamental niches overlap and competition is symmetric d. when realized niches overlap and competition is symmetric e. when competition is excluded because niches do not overlap
- Which of the following statements is correct regarding the competitive exclusion concept? a. multiple species can’t share the exact same niche within a community b. the realized niche of a species is different from its fundamental niche. c. competition within a population results in the success of the best-adapted individuals. d. two species cannot coexist within the same habitat.Question 4 When disturbance is frequent, competition is often less intense. Question 4 options: A) True B) False Question 5 Directional selection on the niche to reduce overlap leads to ___________. (two words) Question 6 In a coevolutionary arms race ____________. 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.What is competition?Which type of ecological interaction is competition?
- Environmental scientists David Pimentel, Rodolfo Zuniga, and Doug Morrison of Cornell University reviewed scientific estimates for the economic and ecological costs imposed by introduced and invasive species in the United States. They found that, as of 2005, approximately 50,000 species had been introduced in the United States and that these accountedfor over $120 billion in economic costs each year. These costs include direct losses and damage, as well as costs required to control the species. (The researchers did not quantify monetary estimates for losses of biodiversity, ecosystem services, and aesthetics, which they said would drive total costs several times higher.) Calculate values missing from the table to determine the number of introduced species of each type of organism and the annual cost that each imposes on our economy. Of the 50,000 species introduced into the UnitedStates, half are plants. Describe two ways in whichnon-native plants might be brought to a new location.How…why does intraspecific competition increase niche breadthQuestion 5 Directional selection on the niche to reduce overlap leads to ___________. (two words) Question 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,…
- Both hawks and owls feed on small mammals to sustain their respective populations without causing competitive exclusion. How can this work when both species live in the same geographic area?Can you think of one organism not mentioned in this chapter as a keystone species that you believe may be a keystone species? For what reasons do you suspect this? How could you experimentally test whether an organism is a keystone species?What forces would be working against an equitable distribution of our resources?