Cambell Biology 11e Vol1 For Utah Valley University Ch 1-25
11th Edition
ISBN: 9781323691519
Author: Urry
Publisher: PEARSON
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Chapter 54, Problem 5TYU
Summary Introduction
Introduction: Keystone species are those species that are present in very less number in an ecosystem but have profound impact on the ecosystem. They are generally predators but others can also act as keystone species.
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Predators that are keystone species can maintain species diversity in a community if theya) reduce the number of disruptions in the community.b) prey only on the least abundant species in the community.c) prey on the community's dominant species.d) competively exclude other predators
Based on the intermediate disturbance hypothesis,a community’s species diversity is increased by(A) frequent massive disturbance.(B) stable conditions with no disturbance.(C) moderate levels of disturbance.(D) human intervention to eliminate disturbance.
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Chapter 54 Solutions
Cambell Biology 11e Vol1 For Utah Valley University Ch 1-25
Ch. 54.1 - Explain how competition, predation, and mutualism...Ch. 54.1 - According to the principle of competitive...Ch. 54.1 - MAKE CONNECTIONS Figure 24.14 illustrates how a...Ch. 54.2 - What two components contribute to species...Ch. 54.2 - How is a food chain different from a food web?Ch. 54.2 - Prob. 3CCCh. 54.2 - MAKE CONNECTIONS Rising atmospheric CO2, levels...Ch. 54.3 - Why do high and low levels of disturbance usually...Ch. 54.3 - Prob. 2CCCh. 54.3 - WHAT IF? Most prairies experience regular fires,...
Ch. 54.4 - Describe two hypotheses that explain why species...Ch. 54.4 - Prob. 2CCCh. 54.4 - WHAT IF? Based on MacArthur and Wilson's island...Ch. 54.5 - What are pathogens?Ch. 54.5 - WHAT IF? Rabies, a viral disease in mammals, is...Ch. 54 - Interspecific interactions affect the survival and...Ch. 54 - Based on indexes such as Shannon diversity, is a...Ch. 54 - Is the disturbance pictured in figure 54.25 more...Ch. 54 - How have periods of glaciation influenced...Ch. 54 - Prob. 54.5CRCh. 54 - Prob. 1TYUCh. 54 - The principle of competitive exclusion states that...Ch. 54 - Based on the intermediate disturbance hypothesis,...Ch. 54 - According to the island equilibrium model, species...Ch. 54 - Prob. 5TYUCh. 54 - Prob. 6TYUCh. 54 - Prob. 7TYUCh. 54 - The most plausible hypothesis to explain why...Ch. 54 - Community 1 contains 100 individuals distributed...Ch. 54 - Prob. 10TYUCh. 54 - EVOLUTION CONNECTION Explain why adaptations of...Ch. 54 - Prob. 12TYUCh. 54 - WRITE ABOUT A THEME: INTERACTIONS In Batesian...Ch. 54 - Prob. 14TYU
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- Why do moderate levels of disturbance result in an increase in community diversity?a) The resulting uniform habitat supports stability, which in turn supports diversity.b) Less-competitive species evolve strategies to compete with dominant species.c) Habitats are opened up for less competitive speciesd) Competively dominant species infrequently exclude less competitive species after a moderate disturbance.arrow_forwardWhat is the single greatest threat to biodiversity?(A) overharvesting of commercially important species(B) habitat alteration, fragmentation, and destruction(C) introduced species that compete with native species(D) novel pathogensarrow_forwardBLANK between species with BLANK ecological niches means they are les likely to occur sympatrically A) Competition; similar B) Predation; similar C) Competition; dissimilar D) Predation; dissimilar E) None of the abovearrow_forward
- How does individual behavior decrease biotic potential? a) It reduces the reproductive rates of individuals, due to competition for resources. b) It supports all individuals of the population to obtain needed resources. c) It increases the population under harsh environmental conditions. d) It decreases the amount of intraspecific competition.arrow_forwardWhich limiting factor would affect the carrying capacity for all species in the pictured ecosystem? a) Number of trees for giraffes b) Hunting behavior of lions c) Birth rate of the giraffes d) Amount of grasslandarrow_forwardThe use of the same limiting resource by two species is called (A) parasitism, (B) competition, (C) mutualism, (D) optimal foraging, (E) character displacement.arrow_forward
- The process of species replacement over time in a community is called (a) global climate change. (b) succession. (c) competition. (d) community change.arrow_forwardHabitats with moderate levels of disturbance have higher species diversity. A) True B) Falsearrow_forwardThe feeding relationships among the species in acommunity determine the community’s(A) secondary succession.(B) ecological niche.(C) species richness.(D) trophic structurearrow_forward
- In 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_forward1. List the three major types of community interactions. 2. Describe the relationship between a predator population and the population of its prey. 3. What is a keystone species? Give an example. 4. Define mutualism and commensalism. 5. What is population density? 6. Define immigration and emigration. 7. What is migration? Give an example. 8. State why dispersal of offspring away from their parents might be beneficial.arrow_forwardThe principle of competitive exclusion states that(A) two species cannot coexist in the same habitat.(B) competition between two species always causes extinctionor emigration of one species.(C) two species that have exactly the same niche cannot coexistin a community.(D) two species will stop reproducing until one species leavesthe habitatarrow_forward
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