This is a "must read" for anyone interested in vegetation history.
Ritchie reviews a vast amount of literature and provides a coherent
overview of a sprawling subject.
The book is divided into eight chapters. The two chapters following the introduction
deal with the physical landscape and climate background, and with autecology and
pollen representation. The next four chapters discuss vegetation history on a
regional basis, beginning with full-glacial refugia, both south of the
glaciated area and Beringia, followed by chapters on eastern Canada, the
western interior, and the Pacific-Cordilleran region. Specific pollen
records are discussed from each region. Each chapter contains plenty of
illustrations, including summary pollen diagrams for the illustrative sites and
a location map.
The final chapter surveys the origins and development of major modern vegetation
regions, such as the boreal forest. Finally, Ritchie discusses the impact of some
palaeoenvironmental controls, including climate, fire, pathogens and paludification.