Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 41.3, Problem 1CC
Why do high and low levels of disturbance usually reduce species diversity? Why does an intermediate level of disturbance promote species diversity?
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Based on the intermediate disturbance hypothesis, a community's species diversity is increased bya) frequent immigrations of new speciesb) moderate levels of disturbancec) intensive disturbance by humansd) stable conditions with no disturbance
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.
What are the major causes of species losses in a geographical region?
Chapter 41 Solutions
Campbell Biology in Focus (2nd 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 - SYNTHESIZE YOUR KNOWLEDGE Describe two types of...
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- How does diversity affect the stability of a community during a disturbance?arrow_forwardBased 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.arrow_forwardWhat is one way in which temporal changes in community species composition negatively impact delivery of an ecosystem service?arrow_forward
- Why do some species tend to grow exponentially while others tend to follow a logistic growth model?arrow_forwardWhat is the impact of invasive aquatic species to the genetic diversity of wild species?arrow_forwardWhat is a keystone species? How can a keystone species within a community be identified?arrow_forward
- Why do high and low levels of disturbance usually reducespecies diversity? Why does an intermediate level ofdisturbance promote species diversity?arrow_forwardWhat are the variables for sustainability for species diversity?arrow_forwardWhich of the following statements is FALSE regarding ecological disturbances? I. Communities that experience moderate disturbances often exhibit greater species diversity than other communities. II. Moderate disturbances create openings/opportunities for colonizing species. III. Major disturbances generally allow the vast majority of species to survive in disturbed areas leaving areas quite open to large numbers of colonizing species. A) I only B) II only C) I and II only D) I, II, and IIIarrow_forward
- What level of disturbance allows the greatest coexistence among species? Y At what level of disturbance is interspecific competition the greatest? X Many #Species in Community Few Low X Y Level of Disturbance High Narrow_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_forwardGive two examples of the benefits gained by theintroduction of nonnative species. Give two examplesof the harmful effects of nonnative species that havebeen introduced deliberately and two examples of thesame for accidentally introduced species. Explain whyprevention is the best way to reduce threats frominvasive species and list four proposed ways to implement this strategyarrow_forward
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