National Academies Press
The National Academies Press (NAP)publish the reports of the National Academies of Sciences, Engineering and Medicine. They published more than 200 books a year on a wide range of topics.
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China Science Publishing & Media Ltd.
China Science Publishing & Media Ltd has been incorporated from Science Press which was founded in August 1954 through the merger of two organizations: Compilation & Translation Bureau of Chinese Academy of Sciences and the then well-known Longmen United Publishers set up in the 1930s. Science Press is the largest comprehensive sci-tech publishing organization in China. Over the past years since its establishment, the Company has formed fine traditions and styles which boil down to: “High Standard”, “High Level”, “High Quality” and “Seriousness”, “Rigorousness”, “Strictness”. Inheriting and continuously sticking to these traditions and styles, the Company has always been committed to serving sci-tech innovation, serving both scientists and readers in general, and disseminating and popularizing scientific knowledge at home and abroad.
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Technology, Engineering & AgricultureDecember 2021Conservation Agriculture in Africa
Climate Smart Agricultural Development
by Saidi Mkomwa, Amir H Kassam
Tillage agriculture has led to wide-spread soil and ecosystem degradation globally, and more particularly in the developing regions. This is especially so in Africa where traditional agricultural practices have become unsustainable due to severe exploitation of natural resources with negative impacts on the environment. In addition, agriculture in Africa today faces major challenges including increased costs, climate change effects and a need for more sustainable production intensification methods. Conservation (no-tillage) agriculture has emerged as a major alternative sustainable agriculture practice in Africa and has spread to many African countries in the past decade as more development and research has enabled its extension and uptake. This landmark volume is based on the material presented at the Second Africa Congress on Conservation Agriculture which was held in Johannesburg, South Africa, 9-12 October 2018. The main theme of the Congress was: Making Climate Smart Agriculture Real in Africa with Conservation Agriculture: Supporting the Malabo Declaration and Agenda 2063. The Congress was aligned to mobilize stakeholders in all agriculture sectors to provide development support, impetus and direction to the vision and agenda for transforming African agriculture as set out by the Malabo Declaration and Agenda 2063. This book is aimed at all agricultural stakeholders in the public, private and civil sectors in Africa engaged in supporting the transformation of conventional tillage agriculture to Conservation Agriculture. This includes: researchers, academics, students, development stakeholders and policy makers as well as institutional libraries across the world.
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Zoology & animal sciencesMay 2021Nutrition and Feeding Organic Cattle
by Robert Blair
Organic cattle farming is on the increase, with consumer demand for organic milk and meat growing yearly. Beginning with an overview of the aims and principles behind organic cattle production, this book presents extensive information about how to feed cattle so that the milk and meat produced meet organic standards, and provides a comprehensive summary of ruminant digestive processes and nutrition. Since the publication of the first edition, global consumers have increasingly become concerned with the sustainability of meat production. Here, Robert Blair considers the interrelationships of sustainable practices and profitability of organic herds, reviewing how to improve forage production and quality, and minimizing the need for supplementary feeding using off-farm ingredients. This new edition also covers: - Managing a recurrent shortage of organic feed ingredients, due to increased GM feed crop cultivation worldwide - Current findings on appropriate breeds and grazing systems for forage-based organic production - Diet-related health issues in organic herds and the effects of organic production on meat and milk quality. Required reading for animal science researchers, advisory personnel that service the organic milk and beef industries and students interested in organic milk and meat production, this book is also a useful resource for organic farming associations, veterinarians, and feed and food industry personnel.
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April 2024Farm Animal Medicine and Surgery for Small Animal Veterinarians
by Graham R Duncanson
Small animal veterinarians are increasingly taking on caseloads that include farm animals, with cases being presented by local hobby farmers, smallholders, and 'novelty pet' owners. With the increase in veterinary telemedicine, they now also receive requests for advice electronically from owners further afield. Recognising this trend, this book provides a quick reference for small-animal orientated veterinarians in the basics of surgery and treatment of farm animals. Popular animals such as cattle, sheep, goats, pigs, camelids and backyard poultry are covered, and basic techniques such as anaesthesia, clinical examination techniques, breeding, surgery and euthanasia are discussed. This new edition: - Expands on recent developments in all areas of medicine and surgery, covering advances such as the increased use of ultrasound across species and adding a new section on anthelmintics. - Provides updates on current major disease threats, as well as providing a One Health perspective. - Includes full colour images to help bring the subject to life. Ideal for looking up information during a consult, or for use as a refresher guide and continuing professional development resource, this book is an important tool for veterinarians in small and mixed practices.
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Business, Economics & LawJune 2019China-Africa Economic and Trade Cooperation:
Case Studies and Plans
by Secretariat of the First China-Africa Economic and Trade Expo Organizing Committee
China-Africa Economics and Trade Cooperation: Case Studies and Plans comes in 3 languages: Chinese(2 volumes), English(2 volumes), and French(2 volumes). This book series include 101 excellent case studies , which related to 21 Chinese provinces and cities and 31 countries in Africa, containing agriculture, manufacturing, commerce and trade, infrastructure, industrial parks, energy and mining, financing and other fields in China-Africa economic and trade cooperation. This set of books is practical and useful for all readers. In addition, the book gives the vivid interpretation on the concept of common prosperity, win-win cooperation, mutual negotiation and construction, shared innovation and progression of Belt and Road Initiative.
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November 2020Major Scientific and Technological Innovations in Ancient China (First Series)
by Institute of the History of Natural Sciences, Chinese Academy of Sciences
This book provides us with historical clues and development status of China's major scientific and technological inventions, which is conducive to inspiring readers to create new inspirations, trigger new scientific thinking, and develop new technological achievements.
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Science & MathematicsDecember 2016Conservation Agriculture for Africa
Building Resilient Farming Systems in a Changing Climate
by Amir H Kassam, Amir H Kassam, Saidi Mkomwa, Saidi Mkomwa, Theodor Friedrich, J N Blignaut, H Boulal, Roland Bunch, Trent W Bunderson, Dennis Garrity, Oussama El Gharras, Mohammed El Mourid, Mphatso Gama, Zwide D Jere, Josef Kienzle, Jaap Knot, Erna Kruger, Peter Kuria, Baqir Lalani, Simon Lugandu, Brand Mbale, Charles Midega, Michael Misiko, Zeyaur Khan, Obedi Mkandawire, Alice Murage, Richard M. Museka, Weldone Mutai, Blessings M. Mwale, Spencer W.D. Ng’oma, John M. Paul, John A. Pickett, Jimmy Pittchar, Brian G. Sims, Hendrik J. Smith, Phillip Tembo, Christian Thierfelder, Patrick C. Wall, Reynolds K. Shula, Peter Dorward, Jose Dambiro
Tillage agriculture has led to widespread soil and ecosystem degradation globally. This is especially so in Africa where traditional and modern tillage-based agricultural practices have become unsustainable due to severe disturbance and exploitation of natural resources, with negative impacts on the environment and rural livelihoods. In addition, agriculture in Africa today faces major challenges including increased costs of production and energy, the effects of climate change, and the lack of an effective paradigm for sustainable intensification, especially for small- and medium-size holdings. Africa is facing a serious challenge to food security and as a continent has not advanced towards eradicating hunger. In addition, the population is still growing much faster than on most other continents. This pressure has led to the emergence of no-till conservation agriculture as a serious alternative sustainable agriculture paradigm. In Africa, in recent years, conservation agriculture techniques and methods have spread to many countries, as greater development, education and research effort are directed towards its extension and uptake. This book is aimed at agricultural researchers and scientists, educationalists, and agricultural service providers, institutional leaders and policy makers working in the fields of sustainable agriculture and international development, and also at agroecologists, conservation scientists, and those working on ecosystem services. This book: · Focuses on research and development initiatives in Africa aimed at building resilient farming systems based on conservation agriculture principles and practices. · Summarises the status of conservation agriculture in Africa today and prospects for its future development in Africa as a basis for sustainable agriculture intensification. · Describes case studies showing the performance of conservation agriculture in Africa. ; Tillage agriculture has led to widespread soil and ecosystem degradation. This book reviews research and development initiatives in Africa aimed at building resilient farming systems. It summarises the status of conservation agriculture today, discusses prospects for future development and provides case studies showing its performance in Africa. ; 1: Conservation Agriculture in Africa: An Overview2: Weather-Proofing Agriculture with Conservation Agriculture3: Conservation Agriculture: Growing more with less – the future of sustainable intensification4: Empowering Smallholder Farmers with Profitable and Sustainable Farming using Conservation Agriculture – the Case of East Africa5: Implementing the Principles of Conservation Agriculture in Malawi: Crop Yields and Factors Affecting Adoption6: Innovation Systems and farmer perceptions regarding Conservation Agriculture in Cabo Delgado, Mozambique7: Conservation Agriculture in North Africa: Experiences, Achievements and Challenges8: How Can We Cover Millions of Hectares with Conservation Agriculture in Africa?9: Climate-Smart push-pull - A conservation agriculture technology for food security and environmental sustainability in Africa10: How to Make Conservation Agriculture Ever Green11: Mechanization of smallholder Conservation Agriculture in Africa: contributing resilience to precarious systems12: Conservation Agriculture in South Africa: Lessons from Case Studies13: Extending Conservation Agriculture benefits through Innovation Platforms14: Summing Up
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Journey in Trumplandia: The Rise of Populism in America
by Tiberiu Dianu
The book is a collection of essays about the transformation of America, which has turned from a united nation to one more divided than ever. Some pundits predict that, if things don’t change, another civil war could occur. Have we reached a point of no return? Hopefully, America is mature enough to learn from its mistakes and avoid further scars along its evolving history. "Trumplandia is a welcome addition toward understanding current events, Washington’s international policy, and the present American society; a society polarized and divided as it has not been since the Civil War.” NICHOLAS DIMA, Ph.D., Adjunct Professor and Research Associate, Nelson Institute, James Madison University, Virginia. "The book is fascinating. It provides background to, and insights into [the] current and past political history as well as offering a personal view... of the country and society. Presented in thematic form in chapters and sections, the insights offered provide a suggestive radiography...” Dr. DENNIS DELETANT, OBE, School of Foreign Service, Georgetown University, Washington DC. "There has been this backsliding in... what a truly functioning rule-of-law state is, that has proper separation of co-equal powers, which, if you don’t keep working on that, you backslide. And I am even worried about that here, in the United States right now, about backsliding.” OBIE MOORE, Esq., OLM Advisors LLC, Washington DC “Indeed, Trumplandia should be a welcome addition to any scholar, student or layman’s library, especially in its international edition. If anyone loses sleep over its challenging assertions, then it will have been well worth it.” ERNESTO MORALES HIZON, Ph.D. Candidate in American and Comparative Politics at Claremont Graduate University, Member, Integrated Bar of the Philippines ABOUT THE AUTHOR: TIBERIU DIANU has practiced law in Romania (as a corporate lawyer, judge, senior counselor at the Ministry of Justice, university professor and senior legal researcher), and in the United States (as a legal expert for the judiciary). He published several books and a host of articles in law, politics, and post-communist societies. Tiberiu currently lives and works in Washington, DC.
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2022A Workbook of Chemistry for Students of Medicine and Biology
Introduction to the material covered in standard examinations
by Dirk Röbke and Udo Wolfgramm
Rote learning is one way to pass examinations, but really understanding the subject is even better. Most textbooks are limited to presenting facts without helping the reader review and practice. This workbook fills the gap with more than 1,000 sample examination questions from general, inorganic and organic chemistry. With it, students can practice and deepen what they have learned from textbooks. The problems can be solved without aids, and solutions are provided with detailed explanations. The workbook enjoys great popularity after helping countless students study successfully. From the contents: atomic structure and chemical bonds: noble gas configuration, electronegativity, hybridization, intermolecular interactions | nomenclature and structural formulas of inorganic and organic compounds | chemical equations: double transformations, acid-base reactions, complexes | quantities and concentrations of substance: gravimetry, titrations, percent by mass and by volume | law of mass action | acids, bases and salts: calculating pH value, titration curves, buffers, solubility product | redox reactions and oxidation numbers, Nernst equation | complex compounds | configurational and conformational isomerism | inductive and mesomeric effects | substitution, addition, elimination | aromatic compounds: reactions and second substitution | natural products: carbohydrates, lipids, amino acids, peptides | carbonyl reactions: carboxylic acids, aldehydes, ketones
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November 2020Major Scientific and Technological Innovation in Ancient China: Three Agricultural Vehicles
by Institute of the History of Natural Sciences, Chinese Academy of Sciences
Explain scientific and technological inventions from historical and modern vivid cases. Show the new scientific research results and precious pictures of our country.
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September 2021Zhangjiajie•“Me and My Motherland”
by Zhangjiajie•“Me and My Motherland”Editorial Board
Zhangjiajie• is a book organized and edited by the Propaganda Department of the Zhangjiajie Municipal Committee of the Communist Party of China. At the beginning of 2019, the Propaganda Department of the Zhangjiajie Municipal Party Committee learned about the news of Zhangjiajie, the birthplace of "My Motherland and Me", and then began a long period of time. Argumentation and planning, the book is composed of 4 chapters: "Birth", "Anthem", "Story" and "The Square". The work uses a large number of little-known song creation details, interesting stories and praises to the landscape and humanities of Zhangjiajie. It restores the creation process of the song "Me and My Motherland" for readers. At the same time, through a large number of incisive essays, multi-dimensional and multi-perspective presented Zhangjiajie people's praise of the motherland in all aspects.
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September 2024Arthropod Management and Landscape Considerations in Large-Scale Agroecosystems
by Michael J Brewer, Gary L. Hein, Kristen Baum, Mahendra Bhandari, Haley Butler, Hannalene du Plessis, Norman C. Elliott, Peter C Ellsworth, Sarah Elzay, Isaac L. Esquivel, Ashleigh M. Faris, Aaron J. Gassmann, Kristopher L Giles, Maura Hall, Louis S. Hesler, Anders S. Huseth, William D. Hutchison, Ian MacRae, Robert L. Meagher, Jr, Lance J. Meinke, Steven E. Naranjo, Matthew O'Neal, Shannon L. Osborne, Pankaj Pal, Katherine A. Parys, Dominic Reisig, Tom A Royer, Nina Rudin, Thomas W. Sappington, Gregory A. Sword, Ashley E. Tessnow, Paul A. Umina, Johnnie van den Berg
For large-scale agroecosystems, patterns of pest population increases (graded increases or abrupt outbreaks) and declines (graded suppression or abrupt crashes) vary considerably and are influenced by factors within crop fields and across broader landscape scales. Better understanding of pest population dynamics and the implications of spatial interactions on the function and development of pest management approaches are the main themes of this important book. The book builds from a 60+ year history of field-based pest management by focusing on the drivers of pest management in large-scale agroecosystems and the landscape-scale processes that affect these drivers and contribute to variation in pest outbreaks and suppression. These drivers include abiotic and biotic influences such as weather, spatial composition and arrangement of landscape elements, and widely applied managed inputs such as planting and crop rotation schedules, crop varietal selection, and land and soil conservation efforts. The book introduces general concepts, opportunities, and challenges of arthropod management in large-scale agroecosystems. Case studies from major field crop-based agroecosystems are used to present research approaches and improve understanding and management of pest and beneficial insects in large-scale agroecosystems. Specific research findings are provided on multi-trophic interactions within the system as influenced by climate, landscape, and other ecological, agricultural, and social/economic components of the agroecosystem. The book concludes with a synthesis of these concepts and prospectus for future research and developments in arthropod management in large-scale, plant-based agroecosystems. The book is essential reading for researchers in applied entomology and ecology and for pest management practitioners.
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December 2023Key Questions in Preventative Farm Animal Medicine, Volume 2
Transmission, Diagnosis, Prevention, and Control of Infectious Diseases
by Tanmoy Rana, Sonam Bhatt, Snehil Gupta, Surbhi Gupta, Sushma Gupta, K. Jayalakshmi, K. Karthika, Anil Kumar, Simant Kumar Nanda, Arpita Padhy, Abhishek Pathak, Jigar Raval, Amit Ranjan Sahu, Rajesh Kumar Sahu, Barkha Sharma, Jitendra Tiwari
Providing well over 1,000 questions to test your knowledge of preventative farm animal medicine, the book has been produced in a convenient format so that it can be used at any time in any place. Each chapter starts with a brief introduction to the topic before providing relevant multiple-choice questions. Covering preventative veterinary medicine for common livestock species, the book includes questions about: - rickettsial and protozoan diseases; - prophylaxis in animals; - diagnostic techniques; - collection, preservation, processing and dispatch of clinical materials. Including a full chapter considering important transboundary, emerging and exotic diseases, this self-test resource for students provides a convenient and useful current source of information to anyone interested in learning, revising and assessing their knowledge.
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Geography & the EnvironmentJune 2020New Land, New Life
A success story of new land resettlement in Bangladesh
by Andrew Jenkins, Natasha Haider, Bazlul Karim, Mihir Kumar Chakraborty, Kiran Sankar Sarker, Rezaul Karim, Robiul Islam, Nujulee Begum, Edward Mallorie, Koen de Wilde
The Ganges-Brahmaputra-Meghna delta has newly emerged 'char' islands, resulting from the deposition of sediment, which are very vulnerable, socially, institutionally and environmentally. This book explains how the governments of Bangladesh and the Netherlands and the International Fund for Agricultural Development cooperated on a land-based rural development project to give settlers security and purpose. It details how they engaged communities and civil societies, and implemented an infrastructure aimed at reducing flooding, improving drainage, and providing adequate drinking water and sanitation. The book describes the project's application to crop and animal agriculture, and the development of value chains and encouragement of female participation. It considers the financial underpinning and infrastructure, as well as how to ensure the impacts of the scheme are enduring. The scheme serves as a model for support projects to vulnerable groups faced with climate change and other environmental challenges. This book is suitable for students, researchers, specialists and practitioners in rural development, water resources, land management and soil science.
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2022The Practice of Pharmacy
Textbook for pharmacy interns Handbook for the pharmacy
by Dr. Michael Sax, founded by Dr. Herbert Gebler and Dr. Gerd Kindl
After pharmacy studies have ended, the fascinating world of the pharmacy awaits – simultaneously varied and challenging. This is no problem with this well-established standard work to hand! The 7th edition, with a new editor and new structure, goes through the various stages of pharmacy operation. Beginning with the social mandate to supply medicines and then considering the organisational and economic orientation of a pharmacy, one delves ever deeper into its inner workings. In every area, the appropriate specific information can be found about pharmaceutical law and practice – whether this concerns the back office, over-the-counter medicines, dispensary and dispensing, or the supply of care homes, or preparation of cytotoxic drugs. In addition to the important topic “Dispensing of drugs and medical devices on prescription”, particular attention is paid to the principal activity in the pharmacy – giving advice on self-medication. The contents are based on the regulations for registration of pharmacists and the guidelines of the Federal Chamber of Pharmacists for the practical training of pharmacy interns in the pharmacy. The Practice of Pharmacy safely navigates the user through the practical training year and is the ideal preparation for the 3rd State Examination! Returnees, pharmacies that provide training and pharmacists of many years’ experience, will also benefit from this textbook and reference work.
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AdventureApril 2024I love you…
by Julien Tănase
The book "I Love You..." is part of the trilogy..., "I love you, till death..." and "I love you, as long as my heart beats”, autobiographical love novels which include chapters from life in a couple of the writer Julien Tănase and his wife, Magdi, with whom he has been in a relationship for 30 years, all against the background of the events that Romania has gone through in recent decades, after the Revolution of '89. A trilogy about the endurance over time of a young couple in love, who have gone through events that are out of touch with reality in Romania where sleeping with a gun under the pillow, the fear of having their child kidnapped, and even the "wars" waged against the corruption of magistrates, politicians and the information systems of a civil society gripped by the widespread corruption in Romania, including the lawsuit invented by the DNA (National Anticorruption Directorate) to stop his work as a journalist and finally won by the writer, makes the autobiography of writer Julien Tănase a fascinating one that leaves you with a bitter taste in your mouth and a big question mark; ... "such things have happened and continue to happen in Romania"?... The writer Julien Tănase: "A friend in the Italian Police told me, and I quote him: "... if you had done in Italy what you did for your country, today a street would bear your name! But you had been dead!"
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Geography & the EnvironmentJanuary 2021Key Questions in Applied Ecology and Conservation
A Study and Revision Guide
by Paul Rees
An understanding of applied ecology and conservation is an important requirement of a wide range of programmes of study including applied biology, ecology, environmental science and wildlife conservation.This book is a study and revision guide for students following such programmes. It contains 600 multiple-choice questions (and answers) set at three levels - foundation, intermediate and advanced - and grouped into 10 major topic areas:History and foundations of applied ecology and conservationEnvironmental pollution and perturbationsWildlife and conservation biologyRestoration biology and habitat managementAgriculture, forestry and fisheries managementPest, weed and disease managementUrban ecology and waste managementGlobal environmental change and biodiversity lossEnvironmental and wildlife law and policyEnvironmental assessment, monitoring and modellingThe book has been produced in a convenient format so that it can be used at any time in any place. It allows the reader to learn and revise the meaning of terms used in applied ecology and conservation, study the effects of pollution on ecosystems, the management, conservation and restoration of wildlife populations and habitats, urban ecology, global environmental change, environment law and much more. The structure of the book allows the study of one topic area at a time, progressing through simple questions to those that are more demanding. Many of the questions require students to use their knowledge to interpret information provided in the form of graphs, data or photographs.
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December 2023
Key Questions in Preventative Farm Animal Medicine, Volume 1
Types, Causes and Treatment of Infectious Diseases
by Tanmoy Rana, Chetan D. Chavda, Bhupamani Das, Aishwarya Dash, H. Dhanalakshmi, Abrar Ul Haq, Biswa Ranjan Jena, J. Jyothi, Jaysukh B. Kathiriya, M. Bhavya Sree, Sivajothi Srigireddy
Providing well over 1,000 questions to test your knowledge of preventative farm animal medicine, the book has been produced in a convenient format so that it can be used at any time in any place. Each chapter starts with a brief introduction to the topic before providing relevant multiple-choice questions. Covering preventative veterinary medicine for common livestock species, the book includes questions on: - general concepts of preventative medicine; - viral, bacterial, fungal and mycoplasma diseases; - ecto- and endo-parasitic infections. This self-test resource for students provides a convenient and useful current source of information to anyone interested in learning, revising and assessing their knowledge.
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May 2023Technology and Social Transformations in Hospitality, Tourism and Gastronomy
South Asia Perspectives
by Savita Sharma, Shivam Bhartiya
This book explores the relationship between technology and social transformation in tourism, hospitality and gastronomy. It presents research and case studies, elaborating on benchmark practices adopted by tourism and hospitality professionals. In recent years, technology has transformed the tourism and hospitality industry; the chapters in this book cover areas such as guest experience and service quality, as well as operational areas such as housekeeping and waste management. Further social transformation in tourism is a result of drivers such as a growing interest in gastronomy and the use of social media; this is covered in the first part of the book. The second part outlines how communities may learn from these events. With contributions from academics, entrepreneurs, destination managers and government officials from the South Asia region, this book offers a real insight in to these areas of growing interest and provide a useful resource for those researching and studying within the areas of tourism development and hospitality.
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EconomicsFebruary 1998Economics of Landscape and Wildlife Conservation
by Edited by S Dabbert, A Dubgaard, Martin Whitby
In recent years landscape and wildlife conservation has attracted increased attention from environmentalists and policy-makers. There have been policies within the European Union aimed at conserving wildlife and landscape in Europe for more than a decade and appraisal of these policies is opportune. A workshop was therefore held at the University of Hohenheim in September 1996 to examine critical issues associated with these policies. This workshop was one of a series, each focusing on a key theme as part of the EU Concerted Action, “Policy measures to control environmental impacts from agriculture”. This book presents a selection of revised papers from this workshop. The overall perspective is an economic one, with several chapters reviewing analytical methods, economic valuation of the benefits of agricultural landscapes and the costs and benefits of wildlife conservation. These are set in the context of the Common Agricultural Policy and environmental policies in the EU. The book represents important reading for agricultural and environmental economists, as well as those concerned with ecology and conservation.
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July 2024
Conservation of Dragonflies
Sentinels for Freshwater Conservation
by Michael J Samways
Dragonflies are among the most familiar and popular of all insects, deeply embedded in human cultural history. They are iconic and tell us much about the environments in which we and they live. Their conservation is an important part of biodiversity conservation. One modern dragonfly species is listed as extinct, with many others currently threatened. It is now essential to increase conservation efforts towards saving these threatened species, with strategies now available for doing this. Recovery of dragonfly populations goes hand in hand with improvements to both freshwater conditions and bank vegetation quality. In contrast, some other dragonfly species have benefitted greatly from human transformation of the landscape, with artificial ponds in particular, increasing the population levels of many species. In turn, climate change is seeing many geographical range shifts. Dragonflies are variously sensitive to the health of freshwater systems, and the quality of vegetation along rivers and around ponds. Dragonflies are excellent indicators in these times of great concern over the quality of our freshwater supplies. Their wide range of sensitivities enables us to measure the extent to which freshwater ecosystems are either deteriorating or are improving when we undertake restoration. They enable us to gauge how well we are conserving freshwaters, whether ponds and lakes, streams or rivers. They are also good umbrellas for many other freshwater inhabitants, which altogether reflect the health of a freshwater system. Conservation of Dragonflies: Sentinels for Freshwater Conservation is for naturalists, citizen scientists, entomologists and conservation scientists, as well as practitioners and policy makers around the world.
