Invertebrate animals make up the greater part of the world's biological diversity and are present in all habitats, where they perform essential ecological functions. Their survival is fundamental to the maintenance of life as we know it. Large numbers of invertebrate species are under severe threat of extinction in Europe, or are already extinct due to the extreme transformations that European habitats have suffered due to human activities. The European Strategy for the conservation of invertebrates, adopted by the Council of Europe (Bern Convention) in 2006, addresses the loss of invertebrate biodiversity and promotes their conservation and the services they provide in terrestrial and non-marine aquatic environments. The Strategy offers appropriate guidance to European governments, other decision-makers, land managers, scientists and teachers that have potential influence on invertebrate conservation.

• • • John Harper • • • Nature conservation has changed from an idealistic philosophy to a serious technology. Ecology, the science that underpins the technol ogy of conservation, is still too immature to provide all the wisdom that it must. It is arguable that the desire to conserve nature will in itself force the discipline of ecology to identify fundamental prob lems in its scientific goals and methods. In return, ecologists may be able to offer some insights that make conservation more practicable (Harper 1987). The idea that nature (species or communities) is worth preserv ing rests on several fundamental arguments, particularly the argu ment of nostalgia and the argument of human benefit and need. Nostalgia, of course, is a powerful emotion. With some notable ex ceptions, there is usually a feeling of dismay at a change in the sta tus quo, whether it be the loss of a place in the country for walking or rambling, the loss of a painting or architectural monument, or that one will never again have the chance to see a particular species of bird or plant.

As the first book on the conservation biology of invertebrate animals - the predominant components of most global communities - this volume synthesizes much important information in this emerging science. Global in scope, the book deals with animals in terrestrial, marine, and freshwatercommunities. Also included are chapters on biodiversity, rationale and priorities for invertebrate conservation and practical conservation, and suggestions on agendas for the future. Many examples are discussed, and comprehensive references given. A broad audience from conservationists andenvironmental scientists to specialists in invertebrate biology will want to add this to their list of sources.

Insects do not live in isolation. They interact with the abiotic environment and are major components of the terrestrial and freshwater biotic milieus. They are crucial to so many ecosystem processes and are the warp and weft of all terrestrial and freshwater ecosystems that are not permanently frozen. This means that insect conservation is a two-way process: insects as the subjects of conservation, while also they are useful tools for conserving the environment. This book overviews strategic ways forward for insect conservation. It is a general view of what has worked and what has not for the maintenance of insect diversity across the world, as well as what might be the right approaches for the future.