Biology - Study Guide
8th Edition
ISBN: 9780321501561
Author: Martha R. Taylor
Publisher: PEARSON EDUCATION (COLLEGE)
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Textbook Question
Chapter 54, Problem 16TYK
According to the nonequilibrium model,
- a. chance events such as disturbances play major roles in the structure and composition of communities.
- b. species composition in a community is always in flux as a result of human interventions.
- c. food chains are limited to a few links because long chains are more unstable in the face of environmental disturbances.
- d. the communities with the most diversity have the least stability or resistance to change.
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Chapter 54 Solutions
Biology - Study Guide
Ch. 54 - When two spiny mouse species coexist, Acomys...Ch. 54 - Name the type of mimicry described in each of the...Ch. 54 - Name and give examples of the interspecific...Ch. 54 - Tide pool 1 has three species of sea urchins with...Ch. 54 - Prob. 5IQCh. 54 - Describe the effects of the alder stage on soil...Ch. 54 - Why would the fact that tropical communities are...Ch. 54 - a. How do the rates of immigration and extinction...Ch. 54 - Why are ecologists trapping and testing migrating...Ch. 54 - Complete the following concept map to organize...
Ch. 54 - Community ecologists develop models or hypotheses...Ch. 54 - Two allopatric species of Galapagos finches have...Ch. 54 - The greater blue-ringed octopus (Hapalochlaena...Ch. 54 - Two other species of octopus (H. maculosa and H....Ch. 54 - Two species, A and B, occupy adjoining...Ch. 54 - Two shops in the same block are selling coffee and...Ch. 54 - A palatable (good-tasting) prey species may defend...Ch. 54 - Most humans are host to mites of the genus Demodex...Ch. 54 - The species richness of a community refers to the...Ch. 54 - You have a friend who is a strict vegan; that is,...Ch. 54 - Ecologists survey the tree species in two forest...Ch. 54 - When one species was removed from a tide pool, the...Ch. 54 - Invasive species often reach a large biomass...Ch. 54 - Why do most food chains consist of only three to...Ch. 54 - According to the top-down (trophic cascade) model...Ch. 54 - During succession, inhibition by early species a....Ch. 54 - According to the nonequilibrium model, a. chance...Ch. 54 - Which of the following shows a mismatch between...Ch. 54 - Prob. 18TYKCh. 54 - A major explanation for the decline in species...Ch. 54 - Prob. 20TYK
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- Which of the following is the definition for species richness? A. The number of species in a community. B. The relative abundance and species richness in a community. C. The number of dominant species in a community. D. The proportion of a given species in the community.arrow_forwardStudies that demonstrate that species living in an ecological community change independently of one another in space and time a. indicate that the species arrived in the community at different times. b. indicate that the species’ realized niches are regulated by different aspects of the environment. c. suggest species interactions are the sole determinant of which species coexist in a community. d. None of the choices is correct.arrow_forwardWhich 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.arrow_forward
- Carrying capacity is defined as a species’ average population size in an environment. Which of the following resulted to exceeding carrying capacity in a particular environment? a. increasing birthrates, decreasing deathrates, increasing immigration and no emigration takes place b. increasing birthrates, decreasing deathrates, decreasing immigration and no emigration takes place c. increasing birthrates, decreasing deathrates, decreasing immigration and increasing emigration d. decreasing birthrates, increasing deathrates, increasing immigration and increasing emigrationarrow_forwardK-selected species typically a) have short life spans b) display a logistic graph c) are more competitive than r-selected species d) live close to the biotic potential, taking advantage of the environmental conditionsarrow_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_forward
- Which of the following statements best represents the productivityhypothesis regarding species richness?a. The larger the area, the greater the number of species that will befound there.b. Temperate regions have a lower species richness due to the lack oftime available for migration after the last Ice Age.c. The number of species in a particular community is directly relatedto the amount of available energy.d. As invertebrate productivity increases, species richness will increase.e. Species richness is not related to primary productivity.arrow_forwardThe total number of species present in a community is called the a. species evenness. b. species richness. c. species-area relationship. d. population.arrow_forwardSpecies richness refers to Group of answer choices a. number of species in a community b. how even in abundance the species in a community are c. extinction rate of species d. number of trophic interactions in a food web e. number of species plus evenness of numbers of individualsarrow_forward
- Which statement about zero population growth isoclines of two competing species is true? A. Species coexistence requires that the two isoclines cross. B. The crossing of the two isoclines is a sufficient condition for species coexistence. C. If the species coexist, they will each do so at a higher density than either would if placed alone. D. Strongly competing species can only coexist if the two species have very different carrying capacities. E. Coexistence will occur if the two isoclines are parallel.arrow_forwardWhich of the following regarding species interactions is INCORRECT? a) The net effects of a mutualism on each participant is a fixed characteristic of the interaction, and is rarely influenced by external factors. b) Reciprocal parasitism is an accurate way of describing many mutualistic interactions. c) The Lotka-Volterra competition model accounts for the effects of both interspecific and intraspecific competition.arrow_forwardThis map shows the spread of the red fire ant after its introduction into the United States in Mobile, Alabama, in the 1930s: Which statement best explains the importance of interspecific relationships in the success of this invasive species?a. Ecosystems with more resources will support the red ant over the native ant b. Invaded communities with higher species richness will allow the red ant to thrive c. Communities with fewer feeding relationships are less resilient to change. d. Native ants have a higher relative abundance compared to the invasive red ant.arrow_forward
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