Biology
4th Edition
ISBN: 9781259188121
Author: Peter Stiling, Robert Brooker, Linda Graham, Eric Widmaier
Publisher: McGraw-Hill Education
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Chapter 24.4, Problem 1CC
Genetic Drift
Concept Check: How does the bottleneck effect undermine the efforts of conservation biologists who are trying to save species nearing extinction?
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Movement and Population Genetics: Metapopulation models focus on the BIDE (birth, immigration, death, emigration) dynamics, colonization and extirpation.
Explain how these relate to genetic bottlenecks, and explain why metapopulation models have a hard time predicting such events?
Why is the island biogeography model a strong example of metapopulation dynamics?
INTRODUCTION: Quadrat sampling is a classic tool for the study of ecology, especially biodiversity. In general, a series of squares (quadrats) of a set size are placed in a habitat of interest and the species within those quadrats are identified and recorded.
QUESTION: What are the advantages and disadvantages of a quadrat sampling method?
Question: The island equilibrium model predicts that an island near to other land masses will be able to support ______ species than an island that is far from other land masses because the rate of _________ will be higher due to ___________.
A- Fewer; extinction; increased competition
B- More; extinction; easier dispersal
C- More; immigration; easier dispersal
D- Fewer; immigration; reduced competition
E- Fewer; immigration; harder dispersal
Chapter 24 Solutions
Biology
Ch. 24.1 - Prob. 1CCCh. 24.2 - Prob. 1CCCh. 24.2 - Prob. 2CCCh. 24.2 - Prob. 3CCCh. 24.3 - Prob. 1CCCh. 24.3 - Prob. 1EQCh. 24.3 - Prob. 2EQCh. 24.3 - Prob. 3EQCh. 24.4 - Genetic Drift Concept Check: How does the...Ch. 24.4 - Prob. 1BC
Ch. 24.5 - Prob. 1CCCh. 24.5 - Prob. 1BCCh. 24 - Population geneticists are interested in the...Ch. 24 - The Hardy-Weinberg equation characterizes the...Ch. 24 - Prob. 3TYCh. 24 - Prob. 4TYCh. 24 - Prob. 5TYCh. 24 - Prob. 6TYCh. 24 - Prob. 7TYCh. 24 - Prob. 8TYCh. 24 - Kimuras proposal regarding neutral variation...Ch. 24 - Populations that experience inbreeding may also...Ch. 24 - Prob. 1CQCh. 24 - Prob. 2CQCh. 24 - Prob. 3CQCh. 24 - Antibiotics are commonly used to combat bacterial...Ch. 24 - Discuss die similarities and differences among...
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- Question:- A high and undesirable divergence between two subpopulations could be resolved through which management strategy? A)establishing corridors between habitat fragments B) removing the barriers to dispersal C) capturing and translocating individuals every generation D) any of the actions listed herearrow_forwardQuestion:- How does decreased gene flow among populations contribute to population decline?arrow_forwardMAke ConneCtIonS Suppose that a sudden changein environmental conditions caused a substantial dropin a population’s carrying capacity. Predict how naturalselection and genetic drift might affect this population.(See Concept 23.3.)arrow_forward
- Question:- Identify at least 4 different cause that are used by migratory animals to find their way during migration. Then, pick one of the cause and explain how we know that at least one species or organism uses these cues.arrow_forwardDrift acting independantly in reproductively isolated populations does it increase or decrease the differences between populations?arrow_forwardQuestion: The figure below shows the relative abundance (y axis) of shrubs in an ecosystem in the years following a fire (x axis). The shrubs in this ecosystem fall into two functional groups: fire recruiters and fire persisters. If fire frequency increased significantly in this ecosystem, which group would be benefited? Choose one of the option below A- Both functional groups would benefit equally B- Fire persister species C- Fire recruiter speciesarrow_forward
- Species: fox squirrel Question: What sampling method would you use to estimate N and why?arrow_forwardTry to outline a scenario explaining the evolution of the three species shown in panel g. Use migration, mutation, genetic drift, selection, reproductive isolation, gene flow, extinction, and many generations in your scenario. Based on your scenario, what are the components that are necessary in a population in order for it to split or diverge into two new daughter species from a single ancestor (the parent species)?arrow_forwardEvolution, Biodiversity and Population Ecology How Natural selection shapes organisms? What does Population ecology study? Which factors limit population growth?arrow_forward
- Plz answer shortly. You are a conservation biologist working on a captive breeding program for black-footed ferrets. You have the budget to establish either two populations of 100 ferrets each, or 10 populations of 20 ferrets each. Which approach do you think is most likely to succeed, and why?arrow_forwardHypothetical scenario: In a vast area of a land-locked town, two distinct forest formations can be found – forest over limestone formation a lowland tropical forest. Researchers did an area-random sampling composed of 25 plots measuring 20mx20m for each of the two forest formations. Do you think the two forest formations have the same diversity index values and species richness? Why or why not?arrow_forwardScenario part 2 Imagine you, a researcher, return to this same population after 30 years and you see blue, green, yellow, and orange frogs. Questions part 2 name 1 key agent of microevolution that could be responsible for the appearance of orange frogs in this population. (just 1) name 1 key agent of microevolution that could NOT be responsible for the appearance of orange frogs in this population (just 1)arrow_forward
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