During the past decade there have been many changes in the perfumery industry which are not so much due to the discovery and application of new raw materials, but rather to the astronomic increase in the cost of labour required to produce them. This is reflected more particularly in the flower industry, where the cost of collecting the blossoms delivered to the factories has gone up year after year, so much so that most flowers with the possible exception of Mimosa, have reached a cost price which has compelled the perfumer to either reduce his purchases of absolutes and concretes, or...

This book is a cohesive guide to the available methods that can be used in population viability analysis. It is therefore extremely valuable to both the practitioner of conservation biology and the theoretical population biologist.

This book presents a comprehensive typology and a comprehensible description of spatiotemporal models used in population dynamics. The main types included are: reaction-diffusion systems, patch models, matapopulation approaches, host parasitoid models, cellular automata (interacting particle systems), tessellations and distance models. The models are introduced through examples and with informative verbal explanations to help understanding. Some of the cellular automation examples are models not yet published elsewhere. Possible extensions of certain model types are suggested.

Advances in biochemical techniques are revolutionizing the study of invertebrate ecology. Their application to pest problems is generating detailed information on the population genetics of pests, pest-predator relationships and interactions between pests and their environment.

This book is a paperback reprint of a previously published hardback.
Insects are the major component of the world's biodiversity. By virtue of their vast numbers of both species and individuals, they are vital determinants of terrestrial ecological processes. Quantiatively, insects are important pointers for species-rich geographical areas. Qualitatively, they are also important, whether the subjects of conservation themselves or as tools for identifying biotic areas with high endemism.
Insect Conservation Biology covers a wide range of topics from single species to...

This book presents a theoretical framework for understanding the dynamics of shallow lake communities as it has evolved over the past years from a combination of empirical studies, experimental work and model analysis. Although, as in most theoretical work, mathematical formulations play a role, the models that are used remain simple and most analyses are graphical rather than algebraic. The book will therefore appeal to workers who do not usually dig deep into theoretical ecology such as lake managers, field biologists and experimentalists. Students of theoretical ecology will also gain from...

Ecotoxicology is a relatively new scientific discipline. Indeed, it might be argued that it is only during the last 5-10 years that it has come to merit being regarded as a true science, rather than a collection of procedures for protecting the environment through management and monitoring of pollutant discharges into the environment. The term 'ecotoxicology' was first coined in the late sixties by Prof. Truhaut, a toxicologist who had the vision to recognize the importance of investigating the fate and effects of chemicals in ecosystems. At that time, ecotoxicology was considered a...

This book has two principal objectives. The first is to provide an overview of existing knowledge about competition. The second is to organize this knowledge in such a way that new research paths are suggested. Such a treatment of competition is badly needed. Although there is a voluminous literature on the topic there is no recent synthesis to which experienced researchers or new students may turn. This is my attempt to provide such an overview. I have tried not only to summarize what is known, but also to stress the unknowns in the hope that some new and innovative research will result. A...

The student of biological science in his final years as an undergraduate and his first years as a graduate is expected to gain some familiarity with current research at the frontiers of his discipline. New research work is published in a perplexing diversity of publications and is inevitably con cerned with the minutiae of the subject. The sheer number of research journals and papers also causes confusion and difficulties of assimilation. Review articles usually presuppose a background knowledge of the field and are inevitably rather restricted in scope. There is thus a need for short but...

In the current era of cost awareness and the pressure to free hospital beds as rapidly as possible, coupled with the move towards community care, there is increasing emphasis on returning and main- taining disabled people in the community. Often, many health and welfare workers are involved in this process. Occupational therapists however have a particular role to play. Their training is such that they are able to assess and treat the physical, psychological and social aspects of a disabling condition. This enables them to help disabled people to achieve their maximum ability in the...