Visual ecology is the study of how animals use visual systems to meet their ecological needs, how these systems have evolved, and how they are specialized for particular visual tasks. "Visual Ecology" provides the first up-to-date synthesis of the field to appear in more than three decades. Featuring some 225 illustrations, including more than 140 in color, spread throughout the text, this comprehensive and accessible book begins by discussing the basic properties of light and the optical environment. It then looks at how photoreceptors intercept light and convert it to usable biological signals, how the pigments and cells of vision vary among animals, and how the properties of these components affect a given receptor's sensitivity to light. The book goes on to examine how eyes and photoreceptors become specialized for an array of visual tasks, such as navigation, evading prey, mate choice, and communication.

A timely and much-needed resource for students and researchers alike, "Visual Ecology" also includes a glossary and a wealth of examples drawn from the full diversity of visual systems.The most up-to-date overview of visual ecology availableFeatures some 225 illustrations, including more than 140 in color, spread throughout the textGuides readers from the basic physics of light to the role of visual systems in animal behaviorIncludes a glossary and a wealth of real-world examples

A remarkable look at the rarest butterflies, how global changes threaten their existence, and how we can bring them back from near-extinction Most of us have heard of such popular butterflies as the Monarch or Painted Lady. But what about the Fender's Blue? Or the St. Francis' Satyr? Because of their extreme rarity, these butterflies are not well-known, yet they are remarkable species with important lessons to teach us. The Last Butterflies spotlights the rarest of these creatures-some numbering no more than what can be held in one hand. Drawing from his own first-hand experiences, Nick Haddad explores the challenges of tracking these vanishing butterflies, why they are disappearing, and why they are worth saving. He also provides startling insights into the effects of human activity and environmental change on the planet's biodiversity. Weaving a vivid and personal narrative with ideas from ecology and conservation, Haddad illustrates the race against time to reverse the decline of six butterfly species. Many scientists mistakenly assume we fully understand butterflies' natural histories. Yet, as with the Large Blue in England, we too often know too little and the conservation consequences are dire. Haddad argues that a hands-off approach is not effective and that in many instances, like for the Fender's Blue and Bay Checkerspot, active and aggressive management is necessary. With deliberate conservation, rare butterflies can coexist with people, inhabit urban fringes, and, in the case of the St. Francis' Satyr, even reside on bomb ranges and military land. Haddad shows that through the efforts to protect and restore butterflies, we might learn how to successfully confront conservation issues for all animals and plants. A moving account of extinction, recovery, and hope, The Last Butterflies demonstrates the great value of these beautiful insects to science, conservation, and people.

Muntjac and water deer were introduced to Britain from East Asia. This book provides a comprehensive overview of their natural history and the management of their environmental impacts. In lowland England, muntjac deer are one of the drivers of changes in woodland structure and species composition, and many of the principles relating to such woodland impact are also applicable to the activities of other species of deer. Interest in environmental impacts of deer is not solely restricted to woodlands. The highest densities of water deer occur in wetlands, where there is potential for conflict, and considerable numbers are also found on agricultural land. Muntjac have also settled in suburbia and frequently cause impacts there. Conservationists and national decision makers are concerned both about invasive alien species and about increasing deer populations. The first section covers the natural history of both species including: breeding biology, deer in the field, colonisation of Britain, a detailed look at colonisation in a single county, methods for studying deer populations and a review of deer population numbers. The second section covers environmental impact: risk assessment, impact management, control of muntjac, effect of muntjac browsing and grazing, habitat recovery from muntjac impacts and a study on the impacts of water deer. The section concludes with an overview of management and monitoring. The costs and benefits of both species are discussed, and questions asked about whether we are getting on top of problems caused by muntjac (locally and nationally) and will water deer turn out to be similar to muntjac? Attitudes and approaches to these species are changing: with water deer we are actively studying whether it might be an environmental problem, not waiting until after it has obviously become one. What will happen to distribution, numbers, impacts and attitudes in the future? Will water deer ever become a suburban animal? What does the future hold for water deer in China and Korea - and how important is the English population as a global conservation resource?

This book presents a readable account of butterfly behaviour, based on field observations, great photographs and the latest research. The main focus is on courtship and mating - including perching, searching and territorial behaviour - but to understand these subjects it is necessary to explain how mates are chosen and this requires sections on wing colours and patterns. A chapter on butterfly vision is also essential in terms of how butterflies see the world and each other. There have been exciting discoveries in all of these fields in recent years, including: butterfly vision (butterfly photoreceptors), wing patterns (molecular biology), wing colouration (structural colours and nano-architecture), mating strategies and female choice (ecology and behaviour).

Temperature affects everything. It influences all aspects of the physical environment and governs any process that involves a flow of energy, setting boundaries on what an organism can or cannot do. This novel textbook reveals the key principles behind the complex relationship between organisms and temperature, namely the science of thermal ecology. It starts by providing a rigorous framework for understanding the flow of energy in and out of the organism, before describing the influence of temperature on what organisms can do and how fast they can do it. With these fundamental principles covered, the bulk of the book explores thermal ecology itself, incorporating the important extra dimension of interactions with other organisms. An entire chapter is devoted to the crucially important subject of how organisms are responding to climate change. Indeed, the threat of rapid climatic change on a global scale is a stark reminder of the challenges that remain for evolutionary thermal biologists, and adds a sense of urgency to this book's mission.

Freshwater ecosystems have the greatest species diversity per unit area and many endangered species. This book shows that, rather than being a marginal part of terrestrial protected area management, freshwater conservation is central to sustaining biodiversity. It focuses on better practices for conserving inland aquatic ecosystems in protected areas, including rivers, wetlands, peatlands, other freshwater and brackish ecosystems, and estuaries. The authors define inland aquatic ecosystems, showing just how diverse and widespread they are. They examine the principles and processes that are essential for the conservation of freshwater ecosystems and aquatic species. Major categories of threats to freshwater ecosystems and the flow-on implications for protected area design are described. Practical case studies are used to illustrate principles and practices applied around the world. Specific management needs of the main types of freshwater ecosystems are considered, as well as the management of freshwaters in the broader landscape, showing how natural resource governance processes can be harnessed to better manage freshwater biodiversity. The book offers commentary on how to adapt freshwater conservation practices to climate change and ends with an insightful synthesis.

Beavers are represented by two extant species, the Eurasian beaver (Castor fiber) and the North American beaver (Castor canadensis); each has played a significant role in human history and dominated wetland ecology in the northern hemisphere. Their behaviour and ecology both fascinate and perhaps even infuriate, but seemingly never fail to amaze. Both species have followed similar histories from relentless persecution to the verge of extinction (largely through hunting), followed by their subsequent recovery and active restoration which is viewed by many as a major conservation success story. Beavers have now been reintroduced throughout Europe and North America, demonstrating that their role as a keystone engineer is now widely recognised with proven abilities to increase the complexity and biodiversity of freshwater ecosystems. What animals other than humans can simultaneously act as engineers, forest workers, carpenters, masons, creators of habitats, and nature managers? Over the last 20 years, there has been a huge increase in the number of scientific papers published on these remarkable creatures, and an authoritative synthesis is now timely. This accessible text goes beyond their natural history to describe the impacts on humans, conflict mitigation, animal husbandry, management, and conservation. Beavers: Ecology, Behaviour, Conservation, and Management is an accessible reference for a broad audience of professional academics (especially carnivore and mammalian biologists), researchers and graduate students, governmental and non-governmental wildlife bodies, and amateur natural historians intrigued by these wild animals and the extraordinary processes of nature they exemplify.

Provided here is a detailed picture of the lives and environments of whales and seals, including chapters on anatomy, adaptation to aquatic life, nutrition, migration, reproduction, and paracites and enemies. The interaction of man with these marine animals is also explored, as is their paleontology. New information and 678 color diagrams and illustrations help illuminate the lives of these mysterious animals. At the end of the text, fact sheets about the Mysticetes, Odontocetes, and Pinnipeds, a glossary, and an extensive bibliography provide additional information essential to the study of whales and seals, leaving the reader more fully informed. With this book, all readers, from the curious to the scientist, will find much to further their knowledge of, and fire their passions for, these impressive denizens of the deep.

There is a growing demand for appropriate management of aquatic invasive species in lakes and rivers worldwide. This book covers biology, invasion ecology, sightings, and control techniques of 4 invasive animals and 15 invasive plants in Massachusetts lakes and rivers. It provides valuable information on their biological characteristics and potential expansion pathways, as well as monitoring and management, including alternative management tools using updated biological, chemical, and mechanical methods. The book also includes the regulation of invasive species management to allow resource managers, biologists, practitioners, volunteers, and students a better understanding of compliance and enforcement with environmental law. An example of successful management is highlighted for each invasive species. Invasive Animals and Plants in Massachusetts Lakes and Rivers is the first book to provide comprehensive and systematic coverage and illustrations for both freshwater invasive animals and plants. Although focussing on Massachusetts, it will provide readers with the bigger picture on multiple invasive species, from prevention, early detection, control, ecological restoration, to public education. Natural resource managers in Massachusetts and surrounding states will glean the detailed and valuable information they need to learn and use to prevent and manage freshwater invasive species in the field.

Mudskippers are amphibious fishes native to the Indo-West Pacific and tropical western Africa. Unlike most fishes, mudskippers emerse to forage, find mates, and defend territories. Adaptations to their morphology, physiology and behavior enable mudskippers to accommodate both aquatic and terrestrial habitats. For these traits, mudskippers have long captured the fascination of scientists, naturalists, and fish hobbyists. Some mudskipper taxa (e.g. Periophthalmodon spp., Periophthalmus spp., Boleophthalmus spp.) are readily observed on mudflats and mangrove forests during the ebb tide. Correspondingly, these conspicuous and widespread taxa are relatively well-studied. The autecology and basic biology for the remaing taxa (e.g. Apocryptodon spp. and Oxuderces spp.) are still poorly understood. Fishes Out of Water: Biology and Ecology of Mudskippers is the first comprehensive book to synthesize published scientific information and observation on these fishes. Two dozen subject experts present thorough overviews in fifteen distinct chapters. Contents span mudskipper anatomy, distribution, systematics, physiology, ecology, and conservation. Unique adaptations to terrestriality are discussed within the context of each chapter foci. This authoritative reference equips the reader with the basic foundation to understand mudskipper biology and ecology, while providing a framework in which emerging data are discussed. The book will be of interest to a broad range of students, researchers, and professionals in ichthyology, evolution, ecology, animal behavior, and comparative physiology.

Mammals are the so-called "pinnacle" group of vertebrates, successfully colonising virtually all terrestrial environments as well as the air (bats) and sea (especially pinnipeds and cetaceans). How mammals function and survive in these diverse environments has long fascinated mammologists, comparative physiologists and ecologists. Ecological and Environmental Physiology of Mammals explores the physiological mechanisms and evolutionary necessities that have made the spectacular adaptation of mammals possible. It summarises our current knowledge of the complex and sophisticated physiological approaches that mammals have for survival in a wide variety of ecological and environmental contexts: terrestrial, aerial, and aquatic. The authors have a strong comparative and quantitative focus in their broad approach to exploring mammal ecophysiology. As with other books in the Ecological and Environmental Physiology Series, the emphasis is on the unique physiological characteristics of mammals, their adaptations to extreme environments, and current experimental techniques and future research directions are also considered. This accessible text is suitable for graduate level students and researchers in the fields of mammalian comparative physiology and physiological ecology, including specialist courses in mammal ecology. It will also be of value and use to the many professional mammologists requiring a concise overview of the topic.

Understanding the complex relationships between humans and the natural world is essential for achieving environmental sustainability and improving human well-being, yet many studies are unable to reveal complex interactions and hidden trends. This is the first book to synthesize the findings and approaches of long-term integrated research in a model coupled human and natural system, and to illustrate their applications to regional, national, and global scales. It features a classic long-term interdisciplinary research project in the Wolong Nature Reserve of China, which contains one of the largest wild populations of the world-famous endangered giant pandas. Bringing together a team of contributors from both the natural and social sciences, this book explores how a long-term interdisciplinary and model system approach is essential to uncover the common patterns and mechanisms of coupled systems, to develop ideas and methods for studying and managing other coupled systems, and ultimately to contribute to the development of theories about coupled systems for sustainability. Pandas and People will be essential reading for scholars interested in the interface of the natural and social sciences, including ecologists, conservation biologists, environmental scientists, sustainability scientists, wildlife biologists, forest scientists, sociologists, anthropologists, economists, and political scientists. It will also be a valuable reference for policy makers, natural resource managers, and graduate students.

Over the past decade, advances in both molecular developmental biology and evolutionary ecology have made possible a new understanding of organisms as dynamic systems interacting with their environments. This innovative book synthesizes a wealth of recent research findings to examine how environments influence phenotypic expression in individual organisms (ecological development or 'eco-devo'), and how organisms in turn alter their environments (niche construction). A key argument explored throughout the book is that ecological interactions as well as natural selection are shaped by these dual organism-environment effects. This synthesis is particularly timely as biologists seek a unified contemporary framework in which to investigate the developmental outcomes, ecological success, and evolutionary prospects of organisms in rapidly changing environments. Organism and Environment is an advanced text suitable for graduate level students taking seminar courses in ecology, evolution, and developmental biology, as well as academics and researchers in these fields.

The conservation of biological diversity depends on people's knowledge and actions. This book presents the theory and practice for creating effective education and outreach programmes for conservation. The authors describe an exciting array of techniques for enhancing school resources, marketing environmental messages, using social media, developing partnerships for conservation, and designing on-site programmes for parks and community centres. Vivid case studies from around the world illustrate techniques and describe planning, implementation, and evaluation procedures, enabling readers to implement their own new ideas effectively. Conservation Education and Outreach Techniques, now in its second edition and updated throughout, includes twelve chapters illustrated with numerous photographs showing education and outreach programmes in action, each incorporating an extensive bibliography. Helpful text boxes provide practical tips, guidelines, and recommendations for further exploration of the chapter topics. This book will be particularly relevant to conservation scientists, resource managers, environmental educators, students, and citizen activists. It will also serve as a handy reference and a comprehensive text for a variety of natural resource and environmental professionals.

The first book to highlight research done by women of color in the field of shark science. A special emphasis is placed on amplifying the voices of Black, Indigenous, People of Color as well as artisanal fishers and economically disadvantaged coastal communities. Accessible to younger readers too, encouraging school children to get into marine science. Covers a broad range of topics including biology, ecology and evolution as well as some less talked about topics like outreach and stakeholder engagement. Interdisciplinary approach to shark science and conservation Easily digestible content for non-experts Focuses on a charismatic group of animals, sharks Offers diverse perspectives and cutting-edge research while diving into issues regarding the decolonization of shark science and changing public perception of sharks. This is an opportunity to challenge the notion that there is only one type of scientist or that scientists look and think a certain way.

Brown Trout is an iconic species inhabiting a diversity of habitats from mountain streams of transparent waters to lakes and oceans and is sought after by thousands of passionate anglers worldwide. This book summarizes the important aspects of brown trout s biology and ecology. It includes several chapters focused on the impact caused by the species and on potential management strategies to, first, maintain numerous damaged populations within their natural distributional range and, second, ameliorate its impacts on exotic environments. Authors from all over the world involved in their study and management offer reviews and case studies that provide insight into theory and practice. Brown Trout: Biology, Ecology and Management will provide scientists, researchers and experts in salmonids with attempts to uncover the exit from the complex maze of controversies and challenges associated with this species.

Animals lead rich social lives. They care for one another, compete for resources, and mate. Within a society, social relationships may be simple or complex and usually vary considerably, both between different groups of individuals and over time. These social systems are fundamental to biological organization, and animal societies are central to studies of behavioral and evolutionary biology. But how do we study animal societies? How do we take observations of animals fighting, grooming, or forming groups and produce a realistic description or model of their societies?
"Analyzing Animal" "Societies "presents a conceptual framework for analyzing social behavior and demonstrates how to put this framework into practice by collecting suitable data on the interactions and associations of individuals so that relationships can be described, and, from these, models can be derived. In addition to presenting the tools, Hal Whitehead illustrates their applicability using a wide range of real data on a variety of animal species--from bats and chimps to dolphins and birds. The techniques that Whitehead describes will be profitably adopted by scientists working with primates, cetaceans, birds, and ungulates, but the tools can be used to study societies of invertebrates, amphibians, and even humans. "Analyzing Animal" "Societies "will become a standard reference for those studying vertebrate social behavior and will give to these studies the kind of quality standard already in use in other areas of the life sciences.

Insects display a staggering diversity of mating and social behaviours. Studying these systems provides insights into a wide range of evolutionary and behavioural questions, such as the evolution of sex, sexual selection, sexual conflict, and parental care. This edited volume provides an authoritative update of the landmark book in the field, The Evolution of Insect Mating Systems (Thornhill and Alcock, 1983), which had such a huge impact in shaping adaptationist approaches to the study of animal behaviour and influencing the study of the evolution of reproductive behaviour far beyond the taxonomic remit of insects. This accessible new volume brings the empirical and conceptual scope of the original book fully up to date, incorporating the wealth of new knowledge and research of the last 30 years. It explores the evolution of complex forms of sex determination in insects, and the role of sexual selection in shaping the evolution of mating systems. Selection arising via male contest competition and female choice (both before and after copulation) are discussed, as are the roles of parasites and pathogens in mediating the strength of sexual selection, and the role that parental care plays in successful reproduction. The Evolution of Insect Mating Systems is suitable for both graduate students and researchers interested in insect mating systems or behaviour from an evolutionary, genetical, physiological, or ecological perspective. Due to its interdisciplinary and concept-driven approach, it will also be of relevance and use to a broad audience of evolutionary biologists.

In recent years researchers have discovered that bats play key roles in many ecosystems as insect predators, seed dispersers, and pollinators. Bats also display astonishing ecological and evolutionary diversity and serve as important models for studies of a wide variety of topics, including food webs, biogeography, and emerging diseases. In "Bat Ecology," world-renowned bat scholars present an up-to-date, comprehensive, and authoritative review of this ongoing research.
The first part of the book covers the life history and behavioral ecology of bats, from migration to sperm competition and natural selection. The next section focuses on functional ecology, including ecomorphology, feeding, and physiology. In the third section, contributors explore macroecological issues such as the evolution of ecological diversity, range size, and infectious diseases (including rabies) in bats. A final chapter discusses conservation challenges facing these fascinating flying mammals.
"Bat Ecology" is the most comprehensive state-of-the-field collection for scientists and researchers.
Contributors:
John D. Altringham, Robert M. R. Barclay, Tenley M. Conway, Elizabeth R. Dumont, Peggy Eby, Abigail C. Entwistle, Theodore H. Fleming, Patricia W. Freeman, Lawrence D. Harder, Gareth Jones, Linda F. Lumsden, Gary F. McCracken, Sharon L. Messenger, Bruce D. Patterson, Paul A. Racey, Jens Rydell, Charles E. Rupprecht, Nancy B. Simmons, Jean S. Smith, John R. Speakman, Richard D. Stevens, Elizabeth F. Stockwell, Sharon M. Swartz, Donald W. Thomas, Otto von Helversen, Gerald S. Wilkinson, Michael R. Willig, York Winter

This book is about the inner workings of one of nature’s most complex animal societies: the honey bee colony. It describes and illustrates the results of more than fifteen years of elegant experimental studies conducted by the author. In his investigations, Thomas Seeley has sought the answer to the question of how a colony of bees is organized to gather its resources. The results of his research—including studies of the shaking signal, tremble dance, and waggle dance, and other, more subtle means by which information is exchanged among bees—offer the clearest, most detailed picture available of how a highly integrated animal society works. By showing how several thousand bees function together as an integrated whole to collect the nectar, pollen, and water that sustain the life of the hive, Seeley sheds light on one of the central puzzles of biology: how units at one level of organization can work together to form a higher-level entity. In explaining why a hive is organized the way it is, Seeley draws on the literature of molecular biology, cell biology, animal and human sociology, economics, and operations research. He compares the honey bee colony to other functionally organized groups: multicellular organisms, colonies of marine invertebrates, and human societies. All highly cooperative groups share basic problems: of allocating their members among tasks so that more urgent needs are met before less urgent ones, and of coordinating individual actions into a coherent whole. By comparing such systems in different species, Seeley argues, we can deepen our understanding of the mechanisms that make close cooperation a reality.

Ants are probably the most dominant insect group on Earth, representing ten to fifteen percent of animal biomass in terrestrial ecosystems. Flowering plants, meanwhile, owe their evolutionary success to an array of interspecific interactions--such as pollination, seed dispersal, and herbivory--that have helped to shape their great diversity. "The Ecology and Evolution of Ant-Plant Interactions" brings together findings from the scientific literature on the coevolution of ants and plants to provide a better understanding of the unparalleled success of these two remarkable groups, of interspecific interactions in general, and ultimately of terrestrial biological communities.
"The Ecology and Evolution of Ant-Plant Interactions" synthesizes the dynamics of ant-plant interactions, including the sources of variation in their outcomes. Victor Rico-Gray and Paulo S. Oliveira capture both the emerging appreciation of the importance of these interactions within ecosystems and the developing approaches that place studies of these interactions into a broader ecological and evolutionary context. The collaboration of two internationally renowned scientists, "The Ecology and Evolution of Ant-Plant Interactions" will become a standard reference for understanding the complex interactions between these two taxa.

As natural habitat continues to be lost and the world steadily becomes more urbanized, biologists are increasingly studying the effect this has on wildlife. Birds are particularly good model systems since their life history, behaviour, and physiology are especially influenced by directly measurable environmental factors such as light and sound pollution. It is therefore relatively easy to compare urban individuals and populations with their rural counterparts. This accessible text focuses on the behavioural and physiological mechanisms which facilitate adaptation and on the evolutionary process that ensues. It discusses topics such as acoustics, reproductive cues, disease, and artificial feeding, and includes a series of case studies illustrating cutting edge research on these areas. Avian Urban Ecology is suitable for professional avian biologists and ornithologists as well as graduate students of avian ecology, evolution, and conservation. It will also be of relevance and use to a more general audience of urban ecologists and conservation biologists.

The idea for the present volume stems from the In many cases we had to decide ourselves what long time friendship between the series editor and changes had to be made in the manuscript. This the volume editor. The field work was carried out was done, however, with the prior consent of during several years of the last two decades by Professor Pandeya. We hope that we did not Professor Pandeya and his team of workers: overlook any items which should have been S. C. Sharma, H. K. Jain, K. C. Paliwal, V. M. changed - if we did, it is our responsibility. In Bhanot, S. J. Pathak, R. Sharma, S. C. Bhatt, P. K. order to demonstrate our responsibility I have Mathur, Y. N. Rao and G. V. Saratbabu. The wide signed as co-editor of this volume. scope of the undertaking required expeditions and The series editor accepted this unusual task individual field studies for which reports were because the topic is of great significance for dry available. subtropical regions of the world. It was the task of Professor Pandey a to sift all The Cenchrus grasslands are of great importance this information and put it together in a form in the dry areas of South East Asia. The value of understandable for an international audience. the ecological grassland study for range manage The manuscript was delivered to the series edi ment is therefore obvious."

Peatlands form important landscape elements in many parts of the world and play significant roles for biodiversity and global carbon balance. This new edition has been fully revised and updated, documenting the latest advances in areas such as microbial processes and relations between biological processes and hydrology. As well as thoroughly referencing the latest research, the authors expose a rich older literature where an immense repository of natural history has accumulated. The Biology of Peatlands starts with an overview of the main peatland types (marsh, swamp, fen, and bog), before examining the entire range of biota present (microbes, invertebrates, plants, and vertebrates), together with their specific adaptations to peatland habitats. Detailed coverage is devoted to the genus Sphagnum, the most important functional plant group in northern peatlands, although tropical and southern hemisphere peatlands are also covered. Throughout the book the interactions between organisms and environmental conditions (especially wetness, availability of oxygen, and pH) are emphasized, with chapters on the physical and chemical characteristics of peat, the role of peat as an archive of past vegetation and climate, and peatland succession and development. Several other key factors and processes are then examined, including hydrology and nutrient cycling. The fascinating peatland landforms in different parts of the world are described, together with theories on how they have developed. Human interactions with peatlands are considered in terms of management, conservation, and restoration. A final chapter, new to this edition, focuses on the role of peatlands as sources or sinks for the greenhouse gases carbon dioxide and methane, and the influences of climate change on peatlands. This timely and accessible text is suitable for students and researchers of peatland ecology, as well as providing an authoritative overview for professional ecologists and conservation biologists.

In recent years it has become increasingly clear that chemical interactions play a fundamental role in aquatic habitats and have far-reaching evolutionary and ecological consequences. A plethora of studies have shown that aquatic organisms from most taxa and functional groups respond to minute concentrations of chemical substances released by other organisms. However, our knowledge of this "chemical network" is still negligible. Chemical interactions can be divided into two larger sub-areas based on the function of the chemical substance. First, there are interactions where chemical substances are toxic to other organisms and are used as a defence against consumers (including both herbivores and predators) or a weapon against competitors (allelopathy). Second, chemical substances may be used as a source for information of the environment; for example: how can I find the optimal habitat, the best food, the nicest partner, and avoid being eaten? Aquatic organisms are able to detect and respond to extremely low concentrations of chemical cues to answer all these questions. The book aims at connecting these intriguing chemical interactions with traditional knowledge of organism interactions. Chemical Ecology of Aquatic Systems covers a wide range of studies, both plant and animal, from different geographic regions and habitats - pelagic as well as benthic. Most of the chemical interactions are similar in freshwater and marine habitats and this book therefore strives at integrating work on both systems.