Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 54, Problem 7IQ
Why would the fact that tropical communities are “older” than temperate or polar communities contribute to greater species diversity?
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Chapter 54 Solutions
Study Guide for Campbell Biology
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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- Why do high and low levels of disturbance usually reducespecies diversity? Why does an intermediate level ofdisturbance promote species diversity?arrow_forwardHow is the structural complexity of habitats relevant to species richness?arrow_forwardWhy does habitat fragmentation lead to an increased abundance of species that prefer ecotones?arrow_forward
- How does the ratio of the proportion of edge to interior habitat change with increasing patch size? How does species diversity change with increasing patch size?arrow_forwardWhy do ecologists consider both species richness and species evenness when they quantify species diversity?arrow_forwardThe most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is thata) tropical regions generally have more available water and higher levels of solar radiation.b) diversity increases as evapotranspiration decreases.c) higher temperatures cause more rapid speciation.d) tropical communities are younger.arrow_forward
- Natural processes of species formation and extinction emerge on a timescale measured in millions of years, whereas human-mediated extinctions are measured on a scale of years to decades. How does this discrepancy complicate our attempts to conserve biodiversity?arrow_forwardHabitat fragmentation can lead to: a)The disappearance of the matrix due to decreased habitat heterogeneity b) Changes in patch use by animals, with smaller patches leading increased size of home range or movement for many animals c) Variation in microenvironment near the edge of the patch with negative consequences for diversityarrow_forwardWe tend to regard generalists or “weedy” species as less interesting and less valuable than rare and highly specialized endemic species. What values or assumptions underlie this attitude?arrow_forward
- Why is it difficult to directly observe succession in most ecological communities?arrow_forwardFire creates disturbance in the temperate coniferous forest of the Pacific Northwest. Prior to the early 1900s, patchy, moderately intense, and moderately frequent fires created intermediate amounts of disturbance. Following the early 1900s, a policy of fire suppression greatly reduced fires, creating low disturbance. Today, hotter, drier, longer summers are creating extremely large, intense, and frequent fires, which cause severe disturbance. Which of the following most accurately describes how these levels of disturbance affect species diversity? O Low disturbance allows for the greatest species diversity, because all the organisms are allowed to thrive. Severe disturbance allows for the greatest species diversity, because it facilitates colonization by r-selected species. Moderate disturbance allows for the greatest diversity, because it allows both early and late successional species to exist within an ecosystem. Disturbance does not generally affect species richness. Severe…arrow_forwardWhy does biodiversity decrease from the equator toward the poles?arrow_forward
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