Why Size Matters: From Bacteria to Blue Whales [NOOK Book]

Overview

John Tyler Bonner, one of our most distinguished and creative biologists, here offers a completely new perspective on the role of size in biology. In his hallmark friendly style, he explores the universal impact of being the right size. By examining stories ranging from Alice in Wonderland to Gulliver's Travels, he shows that humans have always been fascinated by things big and small. Why then does size always reside on the fringes of science and never on the center stage? Why do biologists and others ponder size...

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Why Size Matters: From Bacteria to Blue Whales

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Overview

John Tyler Bonner, one of our most distinguished and creative biologists, here offers a completely new perspective on the role of size in biology. In his hallmark friendly style, he explores the universal impact of being the right size. By examining stories ranging from Alice in Wonderland to Gulliver's Travels, he shows that humans have always been fascinated by things big and small. Why then does size always reside on the fringes of science and never on the center stage? Why do biologists and others ponder size only when studying something else--running speed, life span, or metabolism?

Why Size Matters, a pioneering book of big ideas in a compact size, gives size its due by presenting a profound yet lucid overview of what we know about its role in the living world. Bonner argues that size really does matter--that it is the supreme and universal determinant of what any organism can be and do. For example, because tiny creatures are subject primarily to forces of cohesion and larger beasts to gravity, a fly can easily walk up a wall, something we humans cannot even begin to imagine doing.

Bonner introduces us to size through the giants and dwarfs of human, animal, and plant history and then explores questions including the physics of size as it affects biology, the evolution of size over geological time, and the role of size in the function and longevity of living things.

As this elegantly written book shows, size affects life in its every aspect. It is a universal frame from which nothing escapes.

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Editorial Reviews

TRENDS in Ecology and Evolution
The important point made by Bonner . . . is that differences in magnitude affect biological and physical properties directly, exposing the organisms to the action of different selection pressures. . . . Why Size Matters will be of major interest for readers from different disciplines, just as the topic and the principles discussed by Bonner apply to diverse scientific areas.
re J. Riveros "TRENDS in Ecology and Evolution

The important point made by Bonner . . . is that differences in magnitude affect biological and physical properties directly, exposing the organisms to the action of different selection pressures. . . . Why Size Matters will be of major interest for readers from different disciplines, just as the topic and the principles discussed by Bonner apply to diverse scientific areas.
Washington Post Book World - Wray Herbert
Bonner argues that size is a driving force for all of biology. . . . [H]e demonstrates convincingly, size dictates everything from an animal's shape and appearance to its locomotion, speed, voice and social organization.
Zoogoer - Susan Lumpkin
A masterful and engaging work, elegant in its simplicity despite its subject's complexity.
From the Publisher

One of Choice's Outstanding Academic Titles for 2007

"Bonner argues that size is a driving force for all of biology. . . . [H]e demonstrates convincingly, size dictates everything from an animal's shape and appearance to its locomotion, speed, voice and social organization."--Wray Herbert, Washington Post Book World

"From giant dinosaurs to cellular clockworks, people are astonished by the large and fascinated by the small. But as this diminutive book describes with elegant simplicity, size is far more important than mere curiosity- it 'drives the form and function of everything that lives.' . . . Drawing parallels from physics, engineering, and human (and animal societies), Bonner vividly illustrates how something apparently so simple as size is actually so fundamentally important."--Choice

"Bonner's main argument in Why Size Matters is that changes in size are not the result of changes in shape. . . . Bonner has written a book in a friendly voice that enlarges the picture of how everyone, big and small, thinks of size and why it matters very much."--Biology Digest

"A masterful and engaging work, elegant in its simplicity despite its subject's complexity."--Susan Lumpkin, Zoogoer

"[Bonner] examines the largest and smallest creatures on Earth. Size, asserts Bonner, determines five important biological features: strength, surface area, complexity, rate of metabolism, and organism abundance. In this diminutive book, he explains each feature and how it relates to the others. He concludes, size matters."--Science News

"The important point made by Bonner . . . is that differences in magnitude affect biological and physical properties directly, exposing the organisms to the action of different selection pressures. . . . Why Size Matters will be of major interest for readers from different disciplines, just as the topic and the principles discussed by Bonner apply to diverse scientific areas."--Andre J. Riveros TRENDS in Ecology and Evolution

Science News
[Bonner] examines the largest and smallest creatures on Earth. Size, asserts Bonner, determines five important biological features: strength, surface area, complexity, rate of metabolism, and organism abundance. In this diminutive book, he explains each feature and how it relates to the others. He concludes, size matters.
Washington Post Book World
Bonner argues that size is a driving force for all of biology. . . . [H]e demonstrates convincingly, size dictates everything from an animal's shape and appearance to its locomotion, speed, voice and social organization.
— Wray Herbert
Zoogoer
A masterful and engaging work, elegant in its simplicity despite its subject's complexity.
— Susan Lumpkin
Biology Digest
Bonner's main argument in Why Size Matters is that changes in size are not the result of changes in shape. . . . Bonner has written a book in a friendly voice that enlarges the picture of how everyone, big and small, thinks of size and why it matters very much.
Choice
From giant dinosaurs to cellular clockworks, people are astonished by the large and fascinated by the small. But as this diminutive book describes with elegant simplicity, size is far more important than mere curiosity- it 'drives the form and function of everything that lives.' . . . Drawing parallels from physics, engineering, and human (and animal societies), Bonner vividly illustrates how something apparently so simple as size is actually so fundamentally important.
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Product Details

  • ISBN-13: 9781400837557
  • Publisher: Princeton University Press
  • Publication date: 12/5/2011
  • Sold by: Barnes & Noble
  • Format: eBook
  • Edition description: Course Book
  • Pages: 176
  • Sales rank: 1,390,838
  • File size: 3 MB

Meet the Author

John Tyler Bonner is professor emeritus of ecology and evolutionary biology at Princeton University. His many books include "The Evolution of Culture in Animals" and "The Social Amoebae" (both Princeton].
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Read an Excerpt

Why Size Matters

From Bacteria to Blue Whales
By John Tyler Bonner

Princeton University Press

Copyright © 2006 Princeton University Press
All right reserved.

ISBN: 978-0-691-12850-4


Chapter One

Introduction

In the seventeenth century it was held by some that inside a human sperm there was a minute human being-a homunculus-that was planted inside the womb. Development consisted of the miniature homunculus enlarging and passing through birth and on to maturity-just like inflating a balloon. There were others, going back to the early ideas of Aristotle and the many who followed him, who took the view that vast changes in shape occurred between egg and adult, for it could be plainly seen that the early stages of development of any animal bore no resemblance to what came later. These two views frame the point I want to make in this book. In the case of the homunculus, shape is totally unconnected to size; as size increases shape remains unaltered. In the other case-now totally accepted-as size increases from egg to adult, the shape must change; there is no alternative.

Let me put the matter in another way. If an engineer is commissioned to build two bridges, one across the Hudson River and the other across a brook no more than 30 feet wide, it is quite obvious that the two bridges will be very different in their appearance. Even more importantly, they will differ in their construction and materials. These differences will have nothing to do with the artistic whims of the engineer, at least for the larger bridge: they are absolute requirements. Any attempt to build the Hudson River bridge with wooden planks would collapse into the water long before it was finished. The elaborate steel trusses and the carefully designed architecture of the huge bridge are demanded by the width of the Hudson-it is dictated by its large size. As we shall see, this perfectly mirrors what happens in living organisms; they too cannot escape the conditions set by size; they have no choice.

With these thoughts in mind, let me state the main argument of this book. Changes in size are not a consequence of changes in shape, but the reverse: changes in size often require changes in shape. To put it another way, size is a supreme regulator of all matters biological. No living entity can evolve or develop without taking size into consideration. Much more than that, size is a prime mover in evolution. There is abundant evidence for the natural selection of size, for both increases and decreases. Those size changes have the remarkable effect that they guide and encourage novelties in the structure of all organisms. Size is not just a by-product of evolution, but a major player. Size increase requires changes in structure, in function, and, as we will see, in other familiar evolutionary innovations. It requires them because they are needed for the individual to exist. Life would be impossible without the appropriate size-related modifications.

The subject of size has not been ignored in the past. Quite to the contrary, and as will be clear in the pages to come, there is a great literature on matters of size, beginning with the Greeks and bursting into flower with Galileo. This is true for the West, and no doubt there are similar traditions in other cultures.

However, the subject is always to some degree fragmented because it is generally introduced as an adjunct to some other biological phenomenon or property. For instance, the topic might be running speed, or rate of metabolism, or one of many other possibilities, and in the discussion of each of these phenomena the crucial role of size would be included. Many of the themes treated in this book can be found elsewhere. Here I wish to look at them from a different point of view-from the other end of the telescope-and show that the biological world revolves around size.

The mindset that size is not a central issue is quite understandable. To say an elephant is big says nothing about all the things that make an elephant: its anatomy, its physiology, and even its behavior. These are the aspects that draw our attention and the matters we want to study. Yet size is an overarching issue. Its effect is something that no organism, from the smallest bacteria to the largest whale, can escape. It governs their shape and all their activities in a way that is of fundamental significance. Size dictates the characteristics of all living forms. It is the supreme and universal determinant of what any organism can be and can do. Therefore, why is it a subject that always resides in the wings rather than center stage?

The main reason is that organisms are material objects while size is a bloodless geometric construct. Any object, whether animate or inanimate, will have a size. Airplanes, boats, or musical string instruments vary in size just like animals and plants, and in all cases their size and their material construction are totally different matters even though they affect one another.

That the role of size has been to some degree neglected in biology may lie in its simplicity. Size may be a property that affects all of life, but it seems pallid compared to the matter which makes up life. Yet size is an aspect of the living that plays a remarkable, overreaching role that affects life's matter in all its aspects. It is a universal frame from which nothing escapes.

There are many things one wants to know about size, in particular those that concern its evolution. For instance, what is the evidence for my contention that size differences are a prime object of natural selection and are followed by changes in construction? What is the relation between size and internal complexity-that is, the division of labor-and, again, what is the evidence for which came first? What is the relation between size and the timing of all living activities such as the speed of movement of animals, or life span; and does size impose the timing, or the reverse? As we shall see, it is generally true that size is the prime mover: if size changes occur through the agency of natural selection, all those other matters must follow.

SIZE RULES

In the pages to come we will see many examples of where size rules life. They are supported by correlations in which various properties of organisms vary with size. It is these correlations that provide the foundation, the underpinning, for my contention that size rules life. The correlations can be stated in the form of five rules that will be briefly mentioned here and expanded and explained later. The rules are as follows: RULE 1 Strength varies with size.

RULE 2 Surfaces that permit diffusion of oxygen, of food, and of heat in and out of the body, vary with size.

RULE 3 The division of labor (complexity) varies with size

RULE 4 The rate of various living process varies with size, such as metabolism, generation time, longevity, and the speed of locomotion.

RULE 5 The abundance of organisms in nature varies with their size.

Each of these rules will be put in its proper context. Some are physical or engineering principles; rules that apply for size differences occur in the inanimate as well as the animate. A central issue is the role of size in evolution, and this can be seen in numerous manifestations. Size also affects in many fundamental ways the physiology of animals, plants, and other organisms; in fact, this is true for all aspects of living things that involve time or rates of activity. And the human interest in the matter of size (including my own) will not be neglected.

(Continues...)



Excerpted from Why Size Matters by John Tyler Bonner Copyright © 2006 by Princeton University Press. Excerpted by permission.
All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.
Excerpts are provided by Dial-A-Book Inc. solely for the personal use of visitors to this web site.

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Table of Contents

Preface ix
Chapter 1: Introduction 1
Chapter 2: The Human View of Size 7
Chapter 3: The Physics of Size 28
Chapter 4: The Evolution of Size 62
Chapter 5: Size and the Division of Labor 79
Chapter 6: Size and Time 116
Chapter 7: Envoi 147
Notes 153
Index 157
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