Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
3rd Edition
ISBN: 9780134895727
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
Publisher: PEARSON
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Textbook Question
Chapter 41.1, Problem 2CC
According to the principle of competitive exclusion, what outcome is expected when two species with identical niches compete for a
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Which of the following can explain why species are able to coexist, even if the competitive exclusion principle is generally true?
a) Species may be competitively equivalent, with the outcome of each competitive encounter being essentially random.
b) Competitive exclusion may take many generations; prior to that point, there will be coexistence.
c) Spatial heterogeneity in the distribution and concentrations of limiting resources can result in variation in the strength of competition across the landscape.
choose all the answers that apply.
Discuss competition between species, the competitive exclusion principle, and the phenomenon of niche or resource partitioning. How do they compare and/or contrast?
Explain the Competitive Exclusion Principle. What does it mean, and what are its major ecological consequences?
Chapter 41 Solutions
Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
Ch. 41.1 - Explain how interspecific competition, predation,...Ch. 41.1 - According to the principle of competitive...Ch. 41.1 - MAKE CONNECTIONS Figure 22.13 illustrates how a...Ch. 41.2 - What two components contribute to species...Ch. 41.2 - How is a food chain different from a food web?Ch. 41.2 - WHAT IF? Consider a grassland with five trophic...Ch. 41.2 - MAKE CONNECTIONS Rising atmospheric CO2 levels...Ch. 41.3 - Why do high and low levels of disturbance usually...Ch. 41.3 - During succession, how might the early species...Ch. 41.3 - WHAT IF? Most prairies experience regular fires,...
Ch. 41.4 - Describe two hypotheses that explain why species...Ch. 41.4 - Describe how an islands size and distance from the...Ch. 41.4 - WHAT IF? Based on MacArthur and Wilsons island...Ch. 41.5 - What are pathogens?Ch. 41.5 - Prob. 2CCCh. 41 - The feeding relationships among the species in a...Ch. 41 - Prob. 2TYUCh. 41 - Prob. 3TYUCh. 41 - Community 1 contains 100 individuals distributed...Ch. 41 - Prob. 5TYUCh. 41 - SCIENTIFIC INQUIRY An ecologist studying plants in...Ch. 41 - FOCUS ON EVOLUTION Explain why adaptations of...Ch. 41 - FOCUS ON INFORMATION In Bateslan mimicry, a...Ch. 41 - Prob. 9TYU
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- Biologically, what conditions are necessary for stable coexistence of competitors? Describe the major ways that species can adapt to enhance the probability of stable coexistence.arrow_forwardWhat is the outcome of competition? Will they co exist? Or being an exclusion of which species?arrow_forwardWhat is the difference between competitive exclusion and resource partitioning?arrow_forward
- According to the competitive exclusion principle, two species cannot exist together if they occupy the same niche. Either they diverge their niches so they can coexist or one species will die out.All of the following are consistent with the principle of competitive exclusion EXCEPT Select one: a. Birds and bats both consume flying insects, but birds are active in the day and bats are active at night. b. Two species that share the same niche will exclude other competing species. c. Different bird species forage for insects in different parts of the same tree. d. When two species of Paramecium are grown in the same medium, one strain will eventually eliminate its competitor.arrow_forwardWhich statement about the classic competition experiments involving two Paramecium species is FALSE? The experiment involved interspecific competition. The experiment involved exploitation competition. Each species, when grown alone, exhibited logistic growth. When grown together, the species exhibited logistic growth, but each reached a lower carrying capacity than when it was grown alone.arrow_forwardWhen one species is better at obtaining and holding space than another, it is competitively dominant. Based on the diagram which non-mobile (sessile) species is the dominant competitor in the intertidal? Which is second? Rank the six non-mobile species from (1) most to (6) least competitively dominant. Below are the competitive arrows from the slides (recall that sessile consumers are superior competitors over the algal species). gooseneck barnacle mussel acorn barnacle coral weed black pine Primary Producers nori seaweed 1= strongest competitor and 6= weakest competitor common coral weed [ Choose ] nori seaweed [ Choose ] black pine algae [ Choose ] mussels [ Choose ] acorn barnacles [ Choose ] gooseneck barnacles [ Choose ] > > > >arrow_forward
- 16. Which of the following can be briefly described in the phrase, "The niches of two species cannot overlap completely or significantly for an extended period." A) Competitive inclusion principle B) Competitive collusion principle C) Competitive exclusion principle D) Competitive illusion principlearrow_forwardWhat is the difference between a fundamental niche and a realized niche?arrow_forwardWhich of the following biological interactions can be considered interspecific mutualism? Question 7 options: a) A population of mussels that have their population size regulated via starfish predation b) A relationship between two individuals from different species and from which only one benefits c) A lamprey feeding on the blood of a lake trout d) Two lions cooperating with each other while hunting e) Pollination from a hummingbird feeding on a flowerarrow_forward
- 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 overlaparrow_forwardExplain what occurs during competitive exclusion and resource partitioning.arrow_forwardIn a food web, two different species can directly affect each other’s abundance via _ competition or may in fact have their abundance indirectly regulated by a higher trophic level, a phenomenon called ____ competition. a) Intraspecific, apparent b) Interspecific, apparent c) Intraspecific, apparent d) Apparent, interspecificarrow_forward
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