Many multicellular animals do not require oxygen to live but
respire anaerobically. Some of these have adapted to "hostile"
environments, such as sulphide rich habitats, others live as
parasites within host organisms, while others still can perhaps be
said to look back on the early days of life on earth before
anaerobic respiration had evolved. This comprehensive volume lays
out detailed summaries of the strategies for anero- or anoxy-biosis
employed by each major group of metazoan animals. It begins with a
description of the physical chemistry of oxygen, followed by a
dissertation on the perils - and opportunities - created for life
by oxygen derived free radicals. It moves on to examine the
geochronology of the accumulation of oxygen in the environment and
to analyze the first explosive adaptive radiation of the Metazoa in
the Ediacarian and early Cambrian. It then explores the
biochemistry of sulphide dependent organisms and follows with a
detailed account of the evolution of fumarate reductase, the enzyme
system that makes anaerobiosis possible in many invertebrate phyla.
After the survey of invertebrate phyla, there is a chapter
concerned with the strategies adopted by various vertebrates for
anoxybiotic survival, and one on the dependence of many vertebrates
on anaerobic processes. The contributors are authorities from
around the world. The approach to the subject is an evolutionary
one, drawing from many fields in biology. This book should be of
interest to parasitologists, comparative biochemists, evolutionary
biologists, palaeontologists and geochemists.
General
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