front cover of Animal Body Size
Animal Body Size
Linking Pattern and Process across Space, Time, and Taxonomic Group
Edited by Felisa A. Smith and S. Kathleen Lyons
University of Chicago Press, 2013
Galileo wrote that “nature cannot produce a horse as large as twenty ordinary horses or a giant ten times taller than an ordinary man unless by miracle or by greatly altering the proportions of his limbs and especially of his bones”—a statement that wonderfully captures a long-standing scientific fascination with body size. Why are organisms the size that they are? And what determines their optimum size?          
           
This volume explores animal body size from a macroecological perspective, examining species, populations, and other large groups of animals in order to uncover the patterns and causal mechanisms of body size throughout time and across the globe. The chapters represent diverse scientific perspectives and are divided into two sections. The first includes chapters on insects, snails, birds, bats, and terrestrial mammals and discusses the body size patterns of these various organisms. The second examines some of the factors behind, and consequences of, body size patterns and includes chapters on community assembly, body mass distribution, life history, and the influence of flight on body size.
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front cover of Diatoms to Dinosaurs
Diatoms to Dinosaurs
The Size And Scale Of Living Things
Chris McGowan
Island Press, 1994

In Diatoms to Dinosaurs, Chris McGowan takes the reader on a fascinating journey through the natural world, and examines life in all its various forms. He imparts the excitement of discovery and the joy of understanding as he demonstrates the central importance of size and scale to the survival of living organisms.

McGowan investigates a wide range of size-related phenomena, from the gliding mechanism of diatoms to blood pressure problems of dinosaurs. Questions asked -- and answered -- include:

  • Will we ever see giant insects the size of pterodactyls?
  • Why are ants so much stronger relative to body size than elephants?
  • What do a clam, a condor, a tortoise, and a sturgeon have in common?
  • How did the skeleton of a 28-ton Apatosaurus support its weight?
  • How can blood get from the heart to the head of a giraffe without rupturing blood vessels?
The author explicates the scientific concepts -- both physical and biological -- needed to inform the relevant phenomena: area/volume relations, metabolism and other basic physiology, kinetic energy, inertial forces, the biology of senescence, boundary layers, and Reynolds numbers. Numerous illustrations scattered throughout the text make the biophysical principles easily comprehensible to readers, regardless of their scientific sophistication.
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