This book describes the Kluane Boreal Forest Ecosystem Project which operated from 1986 to 1996 in the southwestern Yukon. It begins by describing the area and its physical setting, and then the background of the project and the wisdom that had accumulated to 1986, on how this system might operate. The details of the experiments set up are presented, partly to help the reader appreciate the difficulty of working at -40 degrees and partly to aid the reader should they contemplate doing similar experiements in the future. Then they examine the three trophic levels of plants, the herbivores, and the predators in detail to provide some surprises about how the individual species operate within the overall system. Finally, they synthesize their findings in a model of the boreal forest vertebrate community, and provide an overview of what they have discovered and what remains to be done. Over the ten years of this project a large number of students and researchers have joined together to produce a picture which makes major advances in our understanding of the boreal forest ecosystem.

Seagrasses occur in coastal zones throughout the world in the areas of marine habitats that are most heavily influenced by humans. Despite a growing awareness of the importance of these plants, a full appreciation of their role in coastal ecosystems has yet to be reached. This book provides an entry point for those wishing to learn about seagrass ecology and provides a broad overview of the present state of knowledge. The volume discusses the recent progress in research and current research foci, complemented by extensive literature references to guide the reader to more detailed studies. This book will be valuable to students of marine biology wishing to specialize in this area and to established researchers wanting to enter the field. In addition, it will provide an excellent reference for those involved in the management and conservation of coastal areas that harbor seagrasses.

Each plant species has its own unique passage that is affected by its gene pool, dispersal ability, interactions with competitors and pests, and the habitats and climactic conditions to which it is exposed. This book will explore plant species as dynamic entities within this passage, following the four stages of plant species life that normally occur. Those four stages can be identified as birth, expansion, differentiation and loss of cohesion, and decline/extinction. Each chapter focuses on part of the speciation process and examines it closely in the light of exploring the species passage from birth to death.

British Plant Communities is the first systematic and comprehensive account of the vegetation types of this country. It covers all natural, semi-natural and major artificial habitats in Great Britain (but not Northern Ireland), representing the fruits of fifteen years of research by leading plant ecologists. The book breaks new ground in wedding the rigorous interest in the classification of plant communities that has characterized Continental phytosociology with the deep concern traditional in Great Britain to understand how vegetation works. The published volumes have been greeted with universal acclaim, and the series has become firmly established as a framework for a wide variety of teaching, research and management activities in ecology, conservation and land-use planning.

Mitton explains the questions that geneticists hoped to answer by studying protein variation. He reviews the extensive literature on protein variation, describes the successes and failures of the research program, and evaluates the results of a rich and controversial body of research. It is a history of the research of genetic variation, as well as a useful analysis for all geneticists interested in the genetic structure and evolution of populations.

Within the current context of global interest in biological diversity, this is a timely review of the most recent research into the evolutionary origins of biological diversity and the processes of speciation, from a stellar cast of contributors. The chapters in this book explore the question of how variation arises within species; some emphasize the ecological and behavioural basis of differentiation; others argue for the role of natural selection in generating speciation. Several chapters focus on the important emerging links between sexual selection, sexual conflict, and population differentiation. The final chapters explore the fossil record for data on the origination of species diversity - and extinctions - in the past. This book is a must-have for all researchers and graduate students in the biological sciences who want to be abreast of the latest thinking on the evolution of biological diversity.

British Plant Communities is the first systematic and comprehensive account of the vegetation types of Great Britain. It covers all natural, semi-natural and major artificial habitats in Great Britain (but not Northern Ireland), representing the fruits of fifteen years' research by leading plant ecologists. The book breaks new ground in wedding the rigorous interest in the classification of plant communities that has characterized continental phytosociology with the deep concern traditional in Britain to understand how vegetation works. The three volumes already published have been greeted with universal acclaim and the series has become firmly established as a framework for a wide variety of teaching, research and management activities in ecology, conservation and land-use planning. The present book covers aquatic and swamp vegetation and will be a useful reference for professionals in botany, ecology, conservation, and natural history.

British Plant Communities is the first systematic and comprehensive account of natural vegetation types of Great Britain. It covers all natural, semi-natural and major artificial habitats in Great Britain (excluding Northern Ireland), representing the fruits of fifteen years research by leading plant ecologists. Over 250 plant communities are described in the five volumes, with summaries of their vascular plants, bryophytes and lichens. There are full details in the text of the composition and structure of the vegetation, its relationships to habitat factors and its occurence in characteristic spatial patterns and successions. Numerous maps show the distribution of the communities through Britain and all the vegetation types are related to their closest equivalents in mainland Europe. For each major group of communities an introduction outlines the range of floristic variation and relates it to important environmental influences. A key provides the reader with a means of identifying vegetation types encountered in the field. There are indices to the communities and to their existing synonyms, and to all the plant species encountered in the survey. An extensive bibliography gives full details of the numerous literature references cited. British Plant Communities breaks new ground in wedding traditional Continental phytosociology with the deep concern in Britain to understand how vegetation works. It is intended as a working tool, offering a reliable framework for a wide variety of teaching, research, and management activities in ecology, conservation, and land use planning.

British Plant Communities is the first systematic and comprehensive account of the vegetation types of this country. It covers all natural, semi-natural and major artificial habitats in Great Britain (but not Northern Ireland), representing the fruits of fifteen years of research by leading plant ecologists. The book breaks new ground in wedding the rigorous interest in the classification of plant communities that has characterized Continental phytosociology with the deep concern traditional in Great Britain to understand how vegetation works. The published volumes have been greeted with universal acclaim, and the series has become firmly established as a framework for a wide variety of teaching, research and management activities in ecology, conservation and land-use planning.

British Plant Communities is the first systematic and comprehensive account of the vegetation types of this country. It covers all natural, semi-natural and major artificial habitats in Great Britain (but not Northern Ireland), representing the fruits of fifteen years of research by leading plant ecologists. The book breaks new ground in wedding the rigorous interest in the classification of plant communities that has characterized Continental phytosociology with the deep concern traditional in Great Britain to understand how vegetation works. The published volumes have been greeted with universal acclaim, and the series has become firmly established as a framework for a wide variety of teaching, research and management activities in ecology, conservation and land-use planning.

This book reviews the extensive literature on protein variation, describing the successes and failures of the research programme, and evaluating the results of a rich and controversial body of research. It is a history of the research of genetic variation and a useful analysis for all geneticists interested in the genetic structure and evolution of populations.

Water protection, food production and ecosystem health are worldwide issues. Changes in the global water cycle are affecting human wellbeing in many places, while widespread land and ecosystem degradation, driven by poor agricultural practices, is seriously limiting food production. Understanding the links between ecosystems, water, and food production is important to the health of all three, and sustainably managing these connections is becoming increasingly necessary. This book shows how sustainable ecosystems, especially agroecosystems, are essential for water management and food production.

The recent development of ideas on biodiversity conservation was already being considered almost three-quarters of a century ago for crop plants and the wild species related to them, by the Russian geneticist N. . Vavilov. He was undoubtedly the first scientist to understand the impor tance for humankind of conserving for utilization the genetic diversity of our ancient crop plants and their wild relatives from their centres of diversity. His collections showed various traits of adaptation to environ mental extremes and biotypes of crop diseases and pests which were unknown to most plant breeders in the first quarter of the twentieth cen tury. Later, in the 1940s-1960s scientists began to realize that the pool of genetic diversity known to Vavilov and his colleagues was beginning to disappear. Through the replacement of the old, primitive and highly diverse land races by uniform modem varieties created by plant breed ers, the crop gene pool was being eroded. The genetic diversity of wild species was equally being threatened by human activities: over-exploita tion, habitat destruction or fragmentation, competition resulting from the introduction of alien species or varieties, changes and intensification of land use, environmental pollution and possible climate change."

When predicting the effects of changing climate and carbon dioxide on plants at the global scale there is a major stumbling block--we have very little information, in many cases none, about how plants will respond in the future. In order to circumvent this problem, and until more information on species accumulates, we reduce the diversity of species to a diversity of functions and structures. The structures may be trees, shrubs, herbs and grasses. The functions may be types of photosynthetic processes, the capacity to minimize water loss and varying the timing of growth. This book describes approaches and methods for defining these functional types in ways that maximize our potential to predict accurately the responses of real vegetation with real species diversity. This book will be useful to those interested in botany, ecology, and environmental science.

Why are some plants so important to humans? The chemistry of the plants has a lot to do with it! The plant world offers a fascinating way to explore basic chemistry concepts. The spectacular variety of colors, fragrances and other characteristics of plants are driven by the seemingly subtle differences in the structure and properties of organic compounds. Well-known flowers, like daffodils and narcissus, are examples of plants that provide ample perfumes, pigments and poisons as part of their intricate and fascinating chemistry. This second edition retains it accessibility, expanding on the first edition and combining scientific concepts with colorful pictures and stories in simple, clear language. Readers will find introductory information on some chemistry and plant biology. This prepares them for the more complex chemical structures that compose plant substances, many of them of vital importance to humans. The final chapter has been expanded, in particular the sections on medicinal plants and on genetic modification. The end-of chapter references have been thoroughly updated with articles, books, and relevant websites that illustrate the topics discussed. Dr Margareta Sequin, an organic chemist and plant enthusiast, has taught popular undergraduate college level courses on plant chemistry to non-chemistry majors and has led numerous field seminars for the general public. The comments and questions from these audiences and the topics that especially captured people's interest have greatly shaped this book. The Chemistry of Plants addresses an audience with little previous chemistry knowledge, but will appeal to the expert reader looking for an understanding of more complex plant compounds. It can be used both as a text to introduce organic chemistry as it relates to plants and as a text of reference for more advanced readers.

Grassland ecosystems are deeply affected by human activities and need appropriate management to optimise trade-offs between ecosystem functions and services. Until now they have mainly been analysed as agro-ecosystems for animal production but this book looks beyond the role of grassland as a feeding ground, and evaluates other important processes such as carbon sequestration in soils, greenhouse gas regulation and biodiversity protection. This authoritative volume expertly highlights the need for an immediate balance between agriculture and ecological management for sustainability in the future.

What are the ecological attributes of weeds that confer the ability to interfere with human activities? Roger Cousens and Martin Mortimer place weed management within an ecological context, with the focus on the manipulation of population size. The dynamics of abundance and spatial distribution are considered at both geographic and local scales. The basic processes of dispersal, reproduction and mortality are described, together with the factors that influence them. Management is shown to modify patterns of behaviour that are intrinsic to populations. Attention is given to the evolution and management of resistance to herbicides. This book provides weed science with the conceptual basis that has previously been lacking. It also gives ecologists access to the extensive database on the population ecology of weeds.

This volume provides a detailed account of the increase in forest resources in Europe over the past 40 years. The author discusses the implications of this expansion for the future health and vitality of the forests, for forest policy management and silviculture, and for the economic viability and environmental sustainability of the resource. An increase in thinnings and regeneration cuttings is advocated, replacing currently unstable tree species by true climatic climax species, and shortening rotation ages. The author concludes that preserving the sustainability and biodiversity of Europe's forest ecosystems can be achieved by maintaining the genetic diversity, density, age and health stability of forests, protecting biotopes of endangered species and establishing cultural biotopes and strictly protected natural reserves.

Addressing general readers and biologists, Mark Denny shows how the physics of fluids (in this case, air and water) influences the often fantastic ways in which life forms adapt themselves to their terrestrial or aquatic "media."

This book deals with the lifestyles of phytoplankton, the microscopic plant life living in the open waters of lakes, ponds and rivers and makes frequent references to the phytoplankton of the sea. It reviews adaptations required of organisms to live their lives independently of solid surfaces and the different ways that these have been achieved. Chapters dealing with particular topics are arranged in approximately the order in which they become a problem to the organism: How can it stay up in the water? Can it gain sufficient light and nutrients? How fast can it grow under different conditions? And what are the results of sinking out, feeding by animals, attacks by parasitic fungi and bacteria? The final chapter assembles this information to show ways in which plankton changes with season and through much longer periods of time, contrasting the behaviours in different types of lakes. This book is important for two reasons: it is the first major book on the subject for some years and projects many recent research findings; and the approach departs from previous volumes in concentrating on needs and adaptive responses to them.

Hugh P. Possingham Landscape-scale conservation planning is coming of age. In the last couple of decades, conservation practitioners, working at all levels of governance and all spatial scales, have embraced the CARE principles of conservation planning - Comprehensiveness, Adequacy, Representativeness, and Efficiency. Hundreds of papers have been written on this theme, and several different kinds of software program have been developed and used around the world, making conservation planning based on these principles global in its reach and influence. Does this mean that all the science of conservation planning is over - that the discovery phase has been replaced by an engineering phase as we move from defining the rules to implementing them in the landscape? This book and the continuing growth in the literature suggest that the answer to this question is most definitely 'no. ' All of applied conservation can be wrapped up into a single sentence: what should be done (the action), in what place, at what time, using what mechanism, and for what outcome (the objective). It all seems pretty simple - what, where, when, how and why. However stating a problem does not mean it is easy to solve.

There is a growing concern that many important ecosystems, such as coral reefs and tropical rain forests, might be at risk of sudden collapse as a result of human disturbance. At the same time, efforts to support the recovery of degraded ecosystems are increasing, through approaches such as ecological restoration and rewilding. Given the dependence of human livelihoods on the multiple benefits provided by ecosystems, there is an urgent need to understand the situations under which ecosystem collapse can occur, and how ecosystem recovery can best be supported. To help develop this understanding, this volume provides the first scientific account of the ecological mechanisms associated with the collapse of ecosystems and their subsequent recovery. After providing an overview of relevant theory, the text evaluates these ideas in the light of available empirical evidence, by profiling case studies drawn from both contemporary and prehistoric ecosystems. Implications for conservation policy and practice are then examined.

An Illustrated Guide to British Upland Vegetation is the first comprehensive, single book on plant communities in the British uplands. It provides concise descriptions of all currently recognised British upland vegetation types. Written by a team comprising some of the most experienced upland field botanists and ecologists in the UK, the book brings together all of the upland communities described in the National Vegetation Classification together with a number of previously undescribed assemblages of plant species. A key enables the reader to classify vegetation in the field. Each vegetation type is described clearly and vividly, with guidance on how to differentiate between similar looking communities. There are detailed sections on the ecology, conservation and management of each community, and up-to-date distribution maps. This is the outcome of many years of field work in the British uplands, much of it supported by the UK Government conservation agencies. The book will be an indispensable guide for anyone with a keen interest in the uplands, notably ecologists, land managers, lecturers, and students, as well as the many organisations actively involved in this special environment. 'Using the Rodwell classification, the authors have blended in their own ecological expertise to produce - at last - an account of British upland vegetation which is readable, visual and comprehensive. Its value to nature conservation will be immense.' Dr Derek Ratcliffe, former Chief Scientist, Nature Conservancy Council 'Here is an outstanding companion and rich information-source for all whose occupations and interests lead them to the uplands. It not only furnishes a clear and 'user-friendly' guide to the diversity of vegetation types, but also provides a masterly overview of the upland environment.' Professor Charles H. Gimingham, Former Regius Professor of Botany, University of Aberdeen This book is a reprint edition of ISBN-10 1-86107-553-7 (2004).

In the European Alps the importance of forests as protection against ava lanches and soil erosion is becoming ever clearer with the continuing increase in population and development of tourism. The protective potential of the moun tain forests can currently only be partially realised because a considerable propor tion of high-altitude stands has been destroyed in historical times by man's extensive clearing ofthe forests. The forests still remaining are of limited effec tiveness, due to inadequate density of trees and over-maturity. Considerable efforts, however, are now being made in the Alps and other mountains of the globe to increase the high-altitude forested area through reforestation, to raise depressed timberlines, and to restore remaining protection forests using suit able silvicultural methods to their full protective value. This momentous task, if it is to be successful, must be planned on a sound foundation. An important prerequisite is the assembly of scientific facts con cerning the physical environment in the protection forest zone of mountains, and the course of various life processes of tree species occurring there. Since the introduction of practical field techniques it has been possible to investigate successfully the reaction of trees at various altitudes to recorded factors, and the extent to which they are adapted to the measured situations. Such ecophysio logical studies enable us to recognize the site requirements for individual tree species, and the reasons for the limits of their natural distribution.