Genetics and ecology ought to be complementary disciplines at the population level. This conviction underpins this integrative volume, which brings together geneticists and ecologists to confront the implications of the others' discipline for their own work. The book is divided into three sections: first 'Genes in Ecology', the influence of population genetics on our view of ecology; then 'Modules in Ecology', the use of molecular methods to investigate adaptive and ecological processes; finally 'Ecology in Genetics', the integration of ecological principles into genetics. Most chapters have two authors; a geneticist and an ecologist each bringing their own insights to the topics considered, and illustrating the importance of one discipline for the other. The book also includes protocols for relevant molecular and genetic techniques, including DNA purification, polymerase chain reaction, DNA fingerprinting, sequencing and restriction fragment length polymorphism investigation.