There is a clear need for readily available, up-to-the-minute authoritative statements on the advances being made both in the classical and the modern fields of botanical research and these volumes are presented with the intention of providing for this need. They differ from other series in that the articles included are not, in the main, reviews but represent assessments, by recognized authorities of their own work against the the background of relevant work in progress in other laboratories.

This book, based on 45 exercises suitable for town Ana Couniry Ana all seasons, provides a quantitative introduction to a wide range of ecological concepts relating to Man as well as other animals, using invertebrates as experimental material because they are common and manageable. It includes sample results and analyses to show the appropriate ways of collecting, tabulating and analyzing data, using no more than ordinary school mathematics. Pictorial keys are giver to all the relevant animals in the British Isles and full references to similar keys for N. America.

There is a clear need for readily available, up to the minute authoritative statements on the advances being made both in the classical and the modern fields of botanical research and these volumes are presented with the intention of providing for this need. They differ from other series in that the articles included are not, in the main, reviews but represent assessments, by recognized authorities of their own work against the background of relevant work in progress in other laboratories.

This book fulfills the need for an up-to-date and integrated account of the water relationships of plants. It deals not only with cell and tissue-water relationships, but with plant environment interactions at both the single plant and plant community level. The approach is based throughout on the development of general principles, against which experimental evidence is examined and measurement techniques evaluated. "It has much of interest to pure scientists in a great variety of scientific disciplines ... It holds, therefore, also much of value to the agricultural and horticultural scientist. . . . the author has appreciated the significance of placing phenomena in an ecological context.

The author of this monograph has been engaged in the study of animal rhythms for the past ten years, and is an internationally known authority on periodicities in the terrestrial arthropods. In this book he has outlined the present state of knowledge of animal rhythms and provided a firm base for future research. Included are discussions on apparatus and techniques and the experimental methods adopted by workers in the field. The earlier chapters outline the extent to which periodic phenomena permeate all aspects of zoological research-Sad discuss their ecological importance. In the later sections, consideration is given to the various physiological problems raised by rhythms and hypotheses are postulated concerning their ultimate nature. As the first in this field, Professor Cloudsley Thompson's monograph fills a conspicuous gap by providing a comprehensive' synthesis of numerous ecological and physiological observations. It also includes a detailed survey of the literature. In addition to research workers in the field, this book will be of interest to ecologists, ethnologists, physiologists, and other scientists to whose research rhythms may be relevant.

The ecologists today is faced with two major difficulties of communication, one fundamental to the science and the other concerning relations with his fellow men. The fundamental difficulty is that of combining a broad understanding of complicated ecosystems with an accurate account of detail. The second problem, of communication with a wider audience, is currently affected by public awareness of the human relevance of ecological problems. It is influenced by the demand for "relevant" ecological research and speedy answers to practical problems. These are the primary justifications for a publication such as the present, and these same reasons provide the criteria for acceptable review articles. It is aimed to cover a wide field extending into borderlands with genetics, taxonomy, biometrics and many more. Volume 8 includes four articles which readers may care to match against these rather high-sounding principals. The first article on human ecology as an interdisciplinary concept: a critical inquiry is perhaps the first attempt to draw together the many different themes to which this much-abused title has been applied. The second article about the studies on Cereal Ecosystem is remarkable for introducing a thorough ecological approach to ubiquitous. The third article dealing with realistic models in population ecology extends horizons by applying a mathematician's understanding of the rather heterogeneous and often empirical approaches which together constitute conventional population dynamics. In the last article concerning the populations cycles in small mammals, the authors provides some magnificent examples of the use in ecology of the planned field experiment as well as a wide-ranging review of the common properties and the differences between small mammal population cycles . The reader is entitled to his own views on the relevance of these articles to his conception of what should constitute ecological science; it is our hope that they will all be seen to contribute in their different ways to the general purpose already outlined and, failing that, stimulate others to contribute their views on what is significant in ecology.