Evolution
Evolution
4th Edition
ISBN: 9781605356051
Author: Douglas Futuyma, Mark Kirkpatrick
Publisher: SINAUER
bartleby

Concept explainers

bartleby

Videos

Question
Book Icon
Chapter 19, Problem 1PDT
Summary Introduction

To distinguish: Between the rate of speciation and the rate of diversification in a higher taxon.

Introduction: Diversity is defined as the number of species or genera in many evolutionary studies. Analysis of changes in diversity can be done by studying paleontology and by the phylogenetic relationship among the species. Changes in speciation and diversification can be studied using a number of taxa (N). Speciation rate is represented as S while diversification rate is represented as D.

Expert Solution
Check Mark

Explanation of Solution

The differences between the rate of speciation and diversification rate are mentioned as follows:

No.CharacterRate of SpeciationRate of Diversification
1.DefinitionSpeciation rate refers to the probability of one species “giving birth” to another species over a short period of time represented as dt.Diversification rate is defined as the average increase or decrease in diversity per taxon.
2.RepresentationSpeciation rate is represented by S.D is used to represent the rate of diversification.
3.CalculationRate of speciation can be calculated by dividing the change in the number of species per unit time.Subtracting speciation rate from extinction rate gives the rate of diversification.
Summary Introduction

To explain: The relationship between the rate of speciation, a number of species and the rate of diversification.

Introduction: Diversity is defined as the number of species or genera in many evolutionary studies. Speciation rate refers to the probability of one species “giving birth” to another species over a short period of time which is represented as dt. Diversification rate is defined as the average increase or decrease in diversity per taxon.

Expert Solution
Check Mark

Explanation of Solution

Subtracting speciation rate from extinction rate gives a rate of diversification represented as D. Speciation rate would be greater than the extinction rate if the value of D is greater than 1. A decline in the number of species would be observed if the value of D is negative. There will be an exponential increase or decrease in the number of species if the value of D remains constant over a period of time.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
What conditions make it likely that a small group of closely related species will increase to a large number of species by means of rapid speciation?
Distinguish between sympatric and allopatric and parapatric speciation. Which is considered the (far) more common mechanism of species formation?
How does diversifying could result in sympatric speciation?
Knowledge Booster
Background pattern image
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Text book image
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Text book image
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Text book image
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Text book image
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Text book image
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Phylogenetic Mysteries: Crash Course Zoology #12; Author: CrashCourse;https://www.youtube.com/watch?v=cVaw7nF72Aw;License: Standard youtube license