Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 53.4, Problem 3R
Summary Introduction
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The fact whether the formation of ice sheets in the temperate latitudes support the species diversification rate hypothesis or species diversification time, which resulted in latitudinal variation.
Introduction:
Species diversification rate is the rate, at which new species are formed and the already existing species extinct. This is also known as
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Life: The Science of Biology
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- 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_forwardWhat do paleontological studies show about the relationship be-tween the geographic range of a species and its probability of un-dergoing speciation or extinction? How does this relationship present a paradox for biodiversity?arrow_forwardDescribe two hypotheses that explain why species diversity is greater in tropical regions than in temperate andpolar regionsarrow_forward
- Using the meta-community concept, is it still possible to conserve species (communities) that are greatly affected by habitat fragmentation? Suggest one possible way to effectively conserve declining diversity.arrow_forwardBiologists have observed much more similarity in species composition among boreal forests and among areas of tundra in Eurasia and North American than among areas of tropical rain forests or among Mediterranean woodlands around the globe. Can you offer an explanation of this contrast based on the global distribution of these biomes?arrow_forwardWhy was certain species' density more accurately estimated, and why may some have approached the actual density sooner than others (with a smaller sample size)?arrow_forward
- Using the theory of island biogeography, why do we expect the number of species on an island to reach equilibrium?arrow_forwardSpecies have come and gone in response to changing global climates during the history of the earth. Some of the mass extinctions of the past have resulted in the deaths of over 90% of existing species. What do these biological changes suggest about the long-term stability of the species composition of climax communities?arrow_forwardwhat does it mean if the growth rate is 0.090, probability of extinction is 0.00, mean population is 240, and genetic diversity is 92? Please explain how they relate with each other.arrow_forward
- Is current number of species always the same or very close to average number of species? If not, which simulations do they diverge the most? Which do you think is the best measure of island biodiversity? Explain reasoning.arrow_forwardData shown in this figure describes the species richness of mammals and birds among a variety of Sky islands. Which of the following best fits the correlations represented in the graphs? 1) number of individuals increases with area and decreases with isolation 2) species richness increases with area and decreases with isolation 3) species diversity varies depending on area and isolation? Follow up question which model of species distribution and abundance does this data support? 1) Species area relationship 2) species accumulation curve 3) island-biogeography 4) rapoport’s rulearrow_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_forward
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