Vegetation dynamics is an important subject. A knowledge and under-
standing of it is central to the science of vegetation management-in
grassland, range and nature reserve management, and in aspects of
wildlife management, forestry and agricultural crop production. It is
also a large and diffuse subject. In a small book such as this I had to
be highly selective, and could not do equal justice to all aspects. I
have had therefore to condense many examples, and more regrettably, many
arguments. While I have tried to present a broad selection of topics and
examples, the content inevitably reflects my own special interests and
experience. The study of vegetation and its dynamics does not lend
itselfto neat and tidy divisions, and the way of allotting material into
different chapters here is arbitrary. I have used Chapter I to introduce
a number of ideas, beginning with the nature of vegetation in space,
then passing to an introduction to the nature of changes in vegetation
with time, in particular those generally known as successions. The book
also contains a number of asides to the text's central arguments; I hope
the reader finds these interesting rather than disconcerting.