The conference "Combating Desertification with Plants" was held in Beer Sheva, Israel, from November 2-5, 1999, and was attended by 70 participants from 30 countries and/or international organisations. Desertification - the degradation of soils in drylands - is a phenomenon occurring in scores of countries around the globe. The number of people (in semiarid regions) affected by the steady decline in the productivity of their lands is in the hundred millions. The measures required to halt and reverse the process of desertification fall into many categories - policy, institutional, sociological-anthropological, and technical. Although technical "solutions" are not currently in vogue, the conference organizers felt that perhaps the pendulum had swung too far in the direction of "participatory approaches." Hence IPALAC - The International Program for Arid Land Crops - whose function is to serve as a catalyst for optimizing the contribution of plant germplasm to sustainable development in desertification-prone regions - felt the time was opportune for providing a platform for projects where the "plant-driven" approach to development finds expression. Some 45 papers were delivered at the conference, falling into the categories of this volume: Overview, Potential Germplasm for Arid Lands, Introduction, Domestication and Dissemination of Arid Land Plants, Land Rehabilitation, and Mechanisms of Plant Transfer. The conference was funded by UNESCO (Division of Ecological Sciences), the Ministry of Foreign Affairs of Finland, and MASHAV, Israel's Center for International Development Cooperation.

The authors explain the rewarding results from the interdisciplinary collaboration between an environmental study group working on coastal ecosystems and effects of oil spills and applied mathematicians modelling wave motion on sandy beaches. By using the unified Navier-Stokes equations with a Bingham fluid model for spilled oil, multi-phase flow analysis were made. Decomposition of spilled oil by bacteria was simulated as a chemical reaction, and the theoretical and numerical analysis suggested a countermeasure to help reduce stress on coastal ecosystems. The new understanding of how ecosystems both depend upon, and help to determine, the nature of the shoreline demonstrates promising ways to better assist and exploit the regenerative powers inherent in nature.

The African lakes are an extremely important ecosystem and the subject of much study relating to species introductions and loss of biodiversity. This book provides a thorough review of the whole subject and will be of great interest to fish biologists, fisheries workers, ecologists, environmental scientists and conservationists.

Die "Konvention uber die biologische Vielfalt," ein Ergebnis der Konferenz der Vereinten Nationen fur Umwelt und Entwicklung (UNCED) 1992 in Rio de Janeiro, hat die verschiedenen internationalen Naturschutzbemuhungen erstmals auf eine umfassende, globale Grundlage gestellt. Die unterzeichnenden Staaten verpflichten sich die biologische Vielfalt der Erde zu schutzen und gleichzeitig nachhaltig zu nutzen. Eine der Nutzungen, die Auswirkungen auf die globale Biodiversitat haben, ist der Tourismus. Hier werden am Beispiel vorwiegend europaischer Kustenregionen, den Hauptzentren des Tourismus, Konflikte zwischen Naturschutz und touristischer Nutzung erlautert und Losungsansatze zur Minimierung von Konflikten vorgestellt."

This book was conceived to mark the Silver Jubilee of the British Butterfly Conservation Society. Interest in the conservation of butterflies has increased so rapidly that it is difficult to relate to the situation 25 years ago. Butterflies were on the decline in Britain, Europe and elsewhere but we lacked data on the extent of the decline and the underlying reasons, leaving us unable to implement effective conservation measures. An early recognition of the plight of British butterflies and moths led to the foundation of the society by a small group of conservationists in 1968. Today the society has over 10000 members, owns a number of reserves and sponsors research, conservation and monitoring activities at the local and national level. As part of the Silver Jubilee celebrations an international symposium was held at Keele University in September 1993 entitled 'Ecology and Conservation of Butterflies'. This symposium clearly showed how much important work has been done in recent years and also gave me the impression that the subject had reached a watershed. This was not because the decline of butterflies has stopped or even slowed down, far from it, the threat to our butterflies continues to increase from habitat destruction and intensification of land use. The watershed is in our understanding of the relationship between butterflies and their habitat.

Phenomorphology of flowering plants deals with starts growing, how long it grows and what happens the study of temporal changes in the morphology of to it when it stops growing. Is it being dispersed like plants and plant organs during their whole life diaspores, does it die eventually like leaves, or does span. It is in fact the study of the visible life history it remain alive as part of the plant body during the of each of the vegetative and generative organs of whole lifespan of the plant or during part of it, and the plant. Consequently it combines the use of finally what is its life duration. Generally only the phenology, which deals with the seasonality of phe life history of leaves, stems, flowers and fruits was nophases (Linnaeus 1751), and of morphology, followed. The following phenophases are de since the morphological changes of the plant as a scribed: vegetative growth, flower bud formation, whole and of its individual organs within and be fruiting, dispersal of diaspores, and leaf shedding. tween the phenophases are described. It is hoped that such a study of plant growth and Man's interest in plant life goes back to prehis development will lead to a better understanding of toric times."

Nontarget Effects of Biological Control is the first book of its kind. The environmental safety of biological control has come under scrutiny due to several areas of concerns: the irreversibility of alien introductions, the prevalence of host switching to innocuous native or beneficial species, dispersal of the biocontrol agent to new habitats away from croplands, and the lack of research on the efficacy and impact of biocontrol attempts. The debate has been strongly polarized between conservationists and biological control practitioners. Nontarget Effects of Biological Control proposes that retrospective analyses of systems in place in which nontarget effects are now documented or suspected provide the necessary information for planning and evaluating future releases to reduce risk. The book presents case histories of past biological control introductions from island and continental ecosystems.

The diversity of life is displayed by a diversity the biodiversity elements. These unique of structural and functional elements. Many approaches are usually tailored to the region of aspects of this diversity are critical for main the world where the scientists' work is focused. taining the healthy functioning of biological This book presents accounts of many tech systems both within short and long time scales. niques that are currently being used in different Some highly diverse features of nature arise parts of the globe by conservation scientists. simply from the heterogeneous patterns that Many different techniques are necessary to comprise the web of nature. Many of these handle the differences in data types and data features contribute to the beauty and quality of coverages that occur across the globe. Also, a life. Humans do not yet understand enough variety of mapping approaches are needed about the complexity of nature to distinguish today to strengthen the many diverse critical those elements that act to support natural conservation objectives. These objectives include vitality from those elements that contribute the identification of the distribution patterns exclusively to our experience of beauty and for a species or habitat type and the placement quality in life. of protected area boundaries.

One of the major challenges of sustainable development is the interdisciplinary nature of the issues involved. To this end, a team of conservation biologists, hunters, tourist operators, ranchers, wildlife and land managers, ecologists, veterinarians and economists was convened to discuss whether wildlife outside protected areas in Africa can be conserved in the face of agricultural expansion and human population growth. They reached the unequivocal - if controversial - conclusion that wildlife can be an economic asset, especially in the African savannas, if this wildlife can be sustainably utilized through safari hunting and tourism. Using the African savannas as an example, Wildlife Conservation by Sustainable Use shows that in many instances sustainable wildlife utilization comprises an even better form of land use than livestock keeping. Even when population pressure is high, as in agricultural areas or in humid zones, and wild animal species can pose a serious cost to agriculture, these costs are mainly caused by small species with a low potential for safari hunting. Although ranching has a very low rate of return and is hardly ever profitable, the biggest obstacle to the model of sustainable wildlife use outlined in Wildlife Conservation by Sustainable Use is from unfair competition from the agricultural sector, such as subsidies and lack of taxation, resulting in market distortion for wildlife utilization. This book thus gives valuable evidence for a different way of working, providing arguments for removing such distortions and thereby facilitating financially sound land use and making it a rationally sound choice to conserve wildlife outside protected areas. The expert team of authors, most of whom came together at a workshop to thrash out the ideas that were then developed into the various chapters, has written a superb account of recent research on this complex subject, resulting in a book that is a major contribution to our understanding of sustainable use of land. The important conclusion is that wildlife conservation can be possible for landholders and local communities if they have a financial interest in protecting wildlife on their lands.

Biodiversity is the delicate ecological balance within biological systems such as species and populations. Evidence suggests air pollution disrupts and impoverishes ecosysytems processes, and genetic and population diversity. Based on a symposium conducted by the EPA's Environmental Research Laboratory, this book pulls together current knowledge on the subject, assesses its relevance, and offers a framework for future research on the impact of air pollution on biodiversity through all levels of biological organization. This text is particularly timely due to acid rain and other toxic problems. The text also discusses the best available control technology, management practices, alternative chemicals, and legislative ways to reduce the impact of air pollution on biodiversity.

P.P. Wong ABSTRACT Tourism is environmentally dependent. The unique character ofcoastal areas gives rise to a distinctive tourist development. Although accounts on the impacts ofcoastal tourism can be found in works relating to tourism in general, there are few works specifically on coastal tourism. This present volume focuses on the physical environment of coastal tourism, particularly the geomorphological aspects. The papers deal with basic aspects of the coastal environment for tourism, methodologies for assessing the coastal environment for tourism and empirical studies of various types of coastal environment with tourism development. The resultinggeneralisations are expected to be applied elsewhere. TOURISM AND ENVIRONMENT Environment has various meanings for tourism. In its broadest sense, the environment includes all natural and cultural elements as in OECD's (1981) definition to encompass the natural, built and cultural aspects. This holistic approach is encouraged in understanding the potential impacts arising from tourism. A narrower meaning of environment is the natural and built environment as used by Cohen (1978) and Inskeep (1991: 339). Environment can also be restricted to the natural or physical environment, in order to distinguish it from the economic and social aspects of tourism, as used by tourism researchers (e.g. Mathieson and Wall, 1982; Pearce, 1989). This approach is used predominantly in this volume. Various relationships between tourism and the physical aspects ofthe coast are discussed. There are basic relationships between environment and tourism. Tourism is environmentally dependent and the environment is vulnerable to the impact of tourism.

oil is the lifeblood of the World's economy. It was a critical element in two World Wars and in the Cold War, and, as recent events in the Middle East confirm, people are willing to fight for it. The cheap energy it provides, especially for transport and agriculture, was one of the main factors that made possible the economic prosperity and growth that the World has enjoyed for the past fifty years and more. People rely on it everywhere, and in many forms, and they have become so accustomed to its ready availability that they take it for granted. To conceive of a world without traffic jams and airliners is unthinkable, and while not so obvious, oil lies behind every supermarket shelf, fuelling the tractor that ploughs the field and the delivery van that brings the consumer his food. Yet everyone knows that it is a finite and irreplaceable commodity, formed long ago in the geological past. What no one knows is just how finite it is. This book is an effort to try to answer that question : not in detail, but at least in orders of magnitude. More useful than the figures themselves is the discussion of the elements involved in addressing the subject. While it is impossible to predict the precise pattern of future production, which will be affected by many unforeseeable factors, one can at least begin to think in terms of resource constraint instead of an ever expanding supply of oil.

Over the past decade the importance of natural resources for sustainable agricultural development has been increasingly discussed at international forums and conferences. Aside from the sustainable management of soil, water, and air, it now seems to be accepted that the sustainable management of genetic resources is one of the four indispensable preconditions for a sustainable agriculture. The discussion on conservation of plant genetic resources for food and agriculture (PGRFA), however, has to reflect the costs of conservation as well. These have not yet been discussed intensively. The study analyzes the conservation costs of plant genetic resources; it also assesses the effectiveness of conservation and the efficiency of the different conservation instruments. It is based on extensive surveys in relevant countries. Following the detailed cost and impact analysis, the results show that the effectiveness of conservation strategies may be increased.

Global environmental change occupies a central niche in the pantheon of modern sciences. There is an urgent need to know and understand the way in which global biogeochemical cycles have changed over different time scales in the past and are likely to do so in the future. Equally important, it is necessary to determine the extent to which natural variability and that induce by anthropogenic activities are bringing about change. A number of international co-operative scientific programmes ad dress these issues. Chief among them are the International Geosphere-Biosphere Programme (IGBP), the World Climate Research Programme (WCRP) and the Inter national Human Dimensions Programme (IHDP) for global change. This book is one of a series of IGBP syntheses drawing together findings in global environmental change over the past decade or so. One focus of IGBP activities is the System for Analysis, Research and Training (START). Co-sponsored by the WCRP and IHDP, START establishes regional research networks for global change science in developing countries, stimulates and carries out global change research in developing regions of the world, and builds capacity to undertake such research at personal, institutional and regional levels. Several regional global change networks have been established, and much regional research has been accomplished in the last five years or so. In this book, work relating to four of the older START regions, Southern Africa, South Asia, Southeast Asia and East Asia, will be used as case studies to illustrate regional-global linkages in Earth System Science.

Marine protected areas (MPAs) have an important role in marine conserva tion programmes around the world. Although most have been established relatively recently when compared with protected areas on land, there is considerable expertise on their identification, setting up and management. Some techniques have been adapted from those used on land. Others are novel, and unique to marine conservation. The chapters in this book give an insight into this fast developing field where experiment and innovation work alongside techniques which have been tried and tested. The guiding princi ples behind key stages in the setting up and management of MP As are described, and case studies illustrate how they have worked. While it is most encouraging to read about the successes, the case studies also point to difficulties which have been encountered. Not all of the examples are new or recent but, together, they illustrate what is happening in this field.

Despite acknowledgment that loss of living diversity is an international biological crisis, the ecological causes and consequences of extinction have not yet been widely addressed. In honor of Edward O. Wilson, winner of the 1993 International Prize for Biology, an international group of distinguished biologists bring ecological, evolutionary, and management perspectives to the issue of biodiversity. The roles of ecosystem processes, community structure and population dynamics are considered in this book. The goal, as Wilson writes in his introduction, is "to assemble concepts that unite the disciplines of systematics and ecology, and in so doing to create a sound scientific basis for the future management of biodiversity."

In the Summer of 1991, Bob Carling, who was then Life Sciences Editor of Chapman & Hall, approached me over the possibility of producing an edited volume of works on economics and ecology. As we discussed the matter further, what became clear is that there is a growing literature on the' frontiers' of both disciplines that has involved economists 'borrowing' from ecology and ecologists 'borrowing' from economics. We decided that this volume should try to provide a small cross-section of that literature. I was very much interested in editing this volume for several reasons. First, one of my principal interests in economics has been how the economic analysis of natural resource and environmental problems can benefit from the concepts and lessons learned from other disciplines, in particular ecology. I was grateful at having the opportunity to pull together a selection of readings that illustrate how the integration of the two disciplines can lead to fruitful analysis. Second, I was also aware that, as Director of the London Environmental Economics Centre and as a Senior Researcher at the International Institute of Environment and Development, I was fortunate to have worked with or to have known a number of economists and ecologists whose work would be ideal for this volume. I was delighted that so many of my friends and colleagues were as enthusiastic about this project as I, and agreed to participate.

Since the late 1960s the Indonesian state of East Kalimantan has witnessed a marked increase in the impact of human activities chiefly commercial logging and agricultural exploitation. Located on the island of Borneo, East Kalimantan also was subjected to prolonged droughts and extensive wildfires in 1982-83 and 1997-98 that were linked to the El Nino-Southern Oscillation (ENSO) phenomenon. The changes in the rainforest ecosystem in East Kalimantan during this 15-year cycle of severe ENSO events are the subject of this book. With an eye toward development of rehabilitation techniques for sustainable forest management, the authors examine possible interactive effects of drought, fire, and human impacts on the flora and fauna of the area.

Tropical rain forests are increasingly expected to serve for climate change mitigation and biodiversity conservation amid global climate change and increasing human demands for land. Natural production forests that are legally designated to produce timber occur widely in the Southeast Asian tropics. Synergizing timber production, climate change mitigation and biodiversity conservation in such tropical production forests is one of the most realistic means to resolve these contemporary global problems. Next-generation sustainable forest management is being practiced in the natural tropical rain forest of a model site in Sabah, Malaysian Borneo, while earlier sustainable management practices have generally failed, leading to extensive deforestation and forest degradation elsewhere in the tropics. Ecologists have examined co-benefits of sustainable forestry in the model forest in terms of forest regeneration, carbon sequestration and biodiversity in comparison to a forest managed by destructive conventional methods. Taxonomic groups studied have included trees, decomposers, soil microbes, insects and mammals. A wide array of field methods and technology has been used including count plots, sensor cameras, and satellite remote-sensing. This book is a compilation of the results of those thorough ecological investigations and elucidates ecological processes of tropical rain forests after logging. The book furnishes useful information for foresters and conservation NGOs, and it also provides baseline information for biologists and ecologists. A further aim is to examine the environmental effects of a forest certification scheme as the model forest has been certified by the Forest Stewardship Council. Taken as a whole, this book proves that the desired synergy is possible.

Five years of research carried out by the U.S. Department of Agriculture Forest Services' Northern Global Change Program, contributing to our understanding of the effects of multiples stresses on forest ecosystems over multiple spatial and temporal scales. At the physiological level, reports explore changes in growth and biomass, species composition, and wildlife habitat; at the landscape scale, the abundance distribution, and dynamics of species, populations, and communities are addressed. Chapters include studies of nutrient depletion, climate and atmospheric deposition, carbon and nitrogen cycling, insect and disease outbreaks, biotic feedbacks with the atmosphere, interacting effects of multiple stresses, and modeling the regional effects of global change. The book provides sound ecological information for policymakers and land-use planners as well as for researchers in ecology, forestry, atmospheric science, soil science and biogeochemistry.

National parks have always been an emotive and iconic symbol, ever since the first parks of the modern era were created in the mid-nineteenth century. This book, based on original research, delves deeply into their character and significance, and the larger context in which they developed. The book celebrates the deserved attractiveness of the parks as wilderness or 'spectacle' to millions of visitors, but also emphasises how there was nothing inevitable, self-sustaining or without cost in their magnificence and accessibility. Those early parks were a powerful unifying force as national 'playgrounds', especially as motor transport democratised their use. However they also provoked bitter conflict in their dispossession of local communities and perhaps deliberate segregation of people from scenery and wildlife. That first century of national parks, which concluded with the significant break of the Second World War and the subsequent development of more international approaches to conservation, left an uncertain legacy. It was a fragile foundation from which to build what became an integral part of today's conservation movement.

Yoque en el campo he nacido dig6 que mis cantos son para los unos sonidos, y para otros intencion. H. Hernandes - Martin Fierro. The period of active influence of the people on desert environments in Central Asia counts more than 2,000 years. It includes several stages of the social and the economic development of human society - from primitive culture of hunters to developed modern society with great changes of envi- ronment and "nature remaking".Heritage of the past is one of the main causes of land degradation in Central Asia.So, only historical analysis of relations between the man and the desertcould give infor- mation for awareness of desertification. What an idea have the people about the desert? In the mind of many people "desert" is identified with a sterile, lifeless and gloom land unsuitable for life. The mass media, specially the cinema sup- ports this idea. Very popular subject of many films is the death of travelers in the desert from thirst. Eventhe names of hot winds (the "gibly" inSahara, the "samum" inArabian desertand the "afganets" inCentral Asia) fill the minds of peoplewith horror. There are many legends about armies buried inthe sand,aboutflourishing oases and towns covered with sand drifts. Inthese legends the truth is mixed with fiction. But as known, "the truth isstronger than fiction".

This series presents studies that have used the paradigm of landscape ecology. Other approaches, both to landscape and landscape ecology are common, but in the last decade landscape ecology has become distinct from its predecessors and its contemporaries. Landscape ecology addresses the relationships among spatial patterns, temporal patterns and ecological processes. The effect of spatial configurations on ecological processes is fundamental. When human activity is an important variable affecting those relationships, landscape ecology includes it. Spatial and temporal scales are as large as needed for comprehension of system processes and the mosaic included may be very heterogeneous. Intellec tual utility and applicability of results are valued equally. The Inter national Association for Landscape Ecology sponsors this series of studies in order to introduce and disseminate some of the new knowledge that is being produced by this exciting new environmental science. Gray Merriam Ottawa, Canada Foreword This is a book about real nature, or as close to real as we know - a nature of heterogeneous landscapes, wild and humanized, fine-grained and coarse-grained, wet and dry, hilly and flat, temperate and not so temper ate. Real nature is never uniform. At whatever spatial scale we examine nature, we encounter patchiness. If we were to look down from high above at a landscape of millions of hectares, using a zoom lens to move in and out from broad overview to detailed inspection of a square meter we would see that patterns visible at different scales overlay one another."

People have relied on medicinal products derived from natural sources for millennia, and animals have long been an important part of that repertoire; nearly all cultures, from ancient times to the present, have used animals as a source of medicine. Ingredients derived from wild animals are not only widely used in traditional remedies, but are also increasingly valued as raw materials in the preparation of modern medicines. Regrettably, the unsustainable use of plants and animals in traditional medicine is recognized as a threat to wildlife conservation, as a result of which discussions concerning the links between traditional medicine and biodiversity are becoming increasingly imperative, particularly in view of the fact that folk medicine is the primary source of health care for 80% of the world's population. This book discusses the role of animals in traditional folk medicine and its meaning for wildlife conservation. We hope to further stimulate further discussions about the use of biodiversity and its implications for wildlife conservation strategies.

Easter Island, a World Heritage Site is still, after over 50 years since Thor Heyerdahl's work on the island, a fascinating area to explore and learn about a culture that has only remnants remaining, while documenting a marine ecology still mostly unknown. Easter Island: Scientific Exploration into the World's Environmental Problems in Microcosm presents the research results from three years of interdisciplinary expeditions to Easter Island. The primary objectives were to investigate the effects of human population growth on the ecology of the island and to discover whether any dramatic climatic changes such as a prolonged El Nino could have disrupted the island's fragile ecosystem. The interdisciplinary scientific team were mainly researching the paleontology, archaeology, climatology, and geophysics of the island. This book now brings together the results of the three expeditions, identifies new areas of research, and hopefully will continue to inspire aspiring scientists to revisit this amazing island to explore and demystify this timeless enigma of human history.