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Books > Earth & environment > Earth sciences > The hydrosphere > Hydrology (freshwater)

Biogeochemical Monitoring in Small Catchments - Refereed Papers from BIOGEOMON, the Symposium on Ecosystem Behaviour -... Biogeochemical Monitoring in Small Catchments - Refereed Papers from BIOGEOMON, the Symposium on Ecosystem Behaviour - Evaluation of Integrated Monitoring in Small Catchments, Held in Prague, Czech Republic, September 18-20, 1993 (Hardcover)
Jiri Cerny, Martin Novak, Tomas Paces, R. Kelman Wieder
R3,249 Discovery Miles 32 490 Ships in 10 - 15 working days

The BIOGEOMON conference, held in Prague, September 1993, was dedicated to the use of geochemistry and biology in the elucidation of biogeochemical processes in the context of research on small catchments, which are natural systems that lend themselves to the study of environmental problems at the ecosystem level. Biogeochemical Monitoring in Small Catchments, which contains reviewed papers from the conference, includes long-term studies of nutrient cycling in forested catchments, effects of anthropogenic action on streamwater chemistry, stable isotope studies for tracing biogeochemical processes, determination of the process rates, and mathematical modelling of ecosystem behaviour and mass fluxes. For research scientists and students of ecology, biology, hydrology and geochemistry as well as professionals in natural resources management.

Atlas of Benthic Foraminifera from China Seas - The Bohai Sea and the Yellow Sea (Hardcover, 1st ed. 2016): Yanli Lei, Tiegang... Atlas of Benthic Foraminifera from China Seas - The Bohai Sea and the Yellow Sea (Hardcover, 1st ed. 2016)
Yanli Lei, Tiegang Li
R4,324 Discovery Miles 43 240 Ships in 12 - 17 working days

This atlas gives a comprehensive account on the benthic foraminiferal fauna in the China Seas, especially on the Bohai and the Yellow Seas. Details of about 183 species, subjected to 5 orders, 52 families and 92 genera are included. For each species there is a brief description of the morphological characteristics, synonymised names, measurements and geographical distribution worldwide, as well as a top-level elegant plate illustrated the fossil and live specimens. It could be used as a reference book for researchers working at marine biology, marine geology, micropaleontology, paleoceanography, paleobiology and related fields.

The Future of the Law of the Sea - Bridging Gaps Between National, Individual and Common Interests (Hardcover, 1st ed. 2017):... The Future of the Law of the Sea - Bridging Gaps Between National, Individual and Common Interests (Hardcover, 1st ed. 2017)
Gemma Andreone
R1,628 Discovery Miles 16 280 Ships in 12 - 17 working days

This book is open access under a CC BY-NC 4.0 license. It explores the diverse phenomena which are challenging the international law of the sea today, using the unique perspective of a simultaneous analysis of the national, individual and common interests at stake. This perspective, which all the contributors bear in mind when treating their own topic, also constitutes a useful element in the effort to bring today's legal complexity and fragmentation to a homogenous vision of the sustainable use of the marine environment and of its resources, and also of the international and national response to maritime crimes.The volume analyzes the relevant legal frameworks and recent developments, focusing on the competing interests which have influenced State jurisdiction and other regulatory processes. An analysis of the competing interests and their developments allows us to identify actors and relevant legal and institutional contexts, retracing how and when these elements have changed over time.

Pittsburgh's Rivers (Hardcover): Daniel J Burns Pittsburgh's Rivers (Hardcover)
Daniel J Burns; As told to Carnegie Library of Pittsburgh
R801 R682 Discovery Miles 6 820 Save R119 (15%) Ships in 10 - 15 working days
Big Sky Rivers - The Yellowstone and Upper Missouri (Hardcover, New): Robert Kelley Schneiders Big Sky Rivers - The Yellowstone and Upper Missouri (Hardcover, New)
Robert Kelley Schneiders
R1,414 Discovery Miles 14 140 Ships in 10 - 15 working days

Historically, it is the land of the bison. But the land across which these powerful herds once thundered has been transformed. We know it today by such names as Montana, Wyoming, Dakota, western Iowa, and Nebraska--but it is really buffalo country, the land of the big sky rivers. This book is a tale of two rivers, a history of the majestic Missouri and how it was once wedded to the Yellowstone. Though quite different today--one dammed into reservoirs, the other unregulated with a semblance of wildness--they were once linked ecologically, geographically, and historically. Then in the twentieth century, Euro-Americans dismantled many of these connections and attempted to uncouple the streams. Viewing the rivers and their surrounding lands as a living system, Robert Kelley Schneiders focuses on four components within the Upper Missouri bioregion--the Missouri River valley, the Yellowstone River valley, Homo sapiens, and bison--to show the significance of their interaction over the past two hundred years. To frame his story, Schneiders goes back to the nineteenth-century journals of fur traders and settlers, and in the record of flora, fauna, floods, and human activity he finds evidence of rapid and disruptive change. Bison once had the greatest influence on the land, and Schneiders depicts an original bison and Indian trail network on which were overlaid the first forts and towns and then the railroads, highways, and reservoirs that reconfigured the region forever. Schneiders explains how these geographical constructs interacted with larger demographic and economic trends in the twentiety-century West, as dams and their resultant reservoirs enhanced the federal presence in the Dakotas andeastern Montana. He describes human encroachment on the rivers and tells why the Corps of Engineers dammed the Missouri but spared the Yellowstone. The engineers and their backers have so completely engineered the Missouri that few people today think of it as anything other than water. But we can reestablish our bonds to the river if we decide to let it flow once again, argues Schneiders. Removing the dams on the Missouri is the first step toward reasserting localism and grassroots democracy. In what was once buffalo country, a dormant ecology awaits rebirth. A major work of environmental history, "Big Sky Rivers offers a challenging vision for the future of the Upper Missouri bioregion.

Landscape and Ecosystem Diversity, Dynamics and Management in the Yellow River Source Zone (Hardcover, 1st ed. 2016): Gary John... Landscape and Ecosystem Diversity, Dynamics and Management in the Yellow River Source Zone (Hardcover, 1st ed. 2016)
Gary John Brierley, Xilai Li, Carola Cullum, Jay Gao
R4,194 R3,617 Discovery Miles 36 170 Save R577 (14%) Ships in 12 - 17 working days

This book offers a comprehensive review of the landscapes and ecosystems of the Upper Yellow River. It focuses on landscapes as a platform for considering environmental values and issues across the region. The book is based on extensive field-based analyses, applications, and photographs.

Emerging Contaminants in River Ecosystems - Occurrence and Effects Under Multiple Stress Conditions (Hardcover, 1st ed. 2016):... Emerging Contaminants in River Ecosystems - Occurrence and Effects Under Multiple Stress Conditions (Hardcover, 1st ed. 2016)
Mira Petrovic, Sergi Sabater, Arturo Elosegi, Damia Barcelo
R8,831 Discovery Miles 88 310 Ships in 12 - 17 working days

This volume offers an overview of the occurrence of emerging organic contaminants in Mediterranean rivers and their relevance to their chemical and ecological quality under water scarcity. With chapters covering the effects under multiple stress conditions of pharmaceuticals, polar pesticides, personal care products, and industrial chemicals, the observations presented can be applicable to other parts of the world where water scarcity is an issue . It is of interest to environmental chemists, ecologists, environmental engineers, and ecotoxicologists, as well as water managers and decision-makers.

Groundwater Engineering (Hardcover, 2nd ed. 2017): Yiqun Tang, Jie Zhou, Ping Yang, Jingjing YAN, Nianqing Zhou Groundwater Engineering (Hardcover, 2nd ed. 2017)
Yiqun Tang, Jie Zhou, Ping Yang, Jingjing YAN, Nianqing Zhou
R5,007 Discovery Miles 50 070 Ships in 12 - 17 working days

Integrating information from several areas of engineering geology, hydrogeology, geotechnical engineering, this book addresses the general field of groundwater from an engineering perspective. It covers geological engineering as well as hydrogeological and environmental geological problems caused by groundwater engineering. It includes 10 chapters, i.e., basic groundwater theory, parameter calculation in hydrogeology, prevention of geological problem caused by groundwater, construction dewatering, wellpoint dewatering methods, dewatering wells and drilling, groundwater dewatering in foundation-pit engineering, groundwater engineering in bedrock areas, numerical simulation in groundwater engineering, groundwater corrosion on concrete and steel. Based on up-to-date literature, it describes recent developments and presents several case studies with examples and problems. It is an essential reference source for industrial and academic researchers working in the groundwater field and can also serve as lecture-based course material providing fundamental information and practical tools for both senior undergraduate and postgraduate students in fields of geology engineering, hydrogeology, geotechnical engineering or to conduct related research.

River Basin Management X (Hardcover): S Mambretti, J. Melgarejo River Basin Management X (Hardcover)
S Mambretti, J. Melgarejo
R3,435 Discovery Miles 34 350 Ships in 10 - 15 working days

Papers presented at the 10th in a series of conferences on River Basin Management are contained in this book. The included works mark a growing global interest in the planning, design and management of river basin systems and take in to account all aspects of Hydrology, Ecology, Environmental Management, Flood Plains and Wetlands. Catastrophic events such as floods and associated landslides, erosion and sedimentation can have serious effects not only on life and property but also on the basin ecology. Frequently these problems are aggravated by the unforeseen consequences of man made changes in the river basin. This has led in recent years to work on river restoration and rehabilitation with various degrees of success. Changes in the landscape, use of the land and climate conditions leads to a continuous revaluation of river basin management objectives requiring the development of better measuring tools in conjunction with accurate computer technology. Specific themes covered in this volume include: Water resources management; Flood risk management; Ecological and environmental impact; Erosion and sediment transport; Hydrological modelling; River restoration and rehabilitation; Hydropower issues and development; River and watershed management; Water quality issues; Organic contamination management; Agricultural pollution; Transboundary water issues; Estuaries and deltas; Climate change; Remote sensing; Hydraulic structures; Rain water management; Water energy nexus; Drought assessment and management; Ecosystem services.

Ecology of Marine Ports of the Black and Azov Sea Basin (Hardcover, 1st ed. 2018): A. K. Vinogradov, Yu. I. Bogatova, I. A.... Ecology of Marine Ports of the Black and Azov Sea Basin (Hardcover, 1st ed. 2018)
A. K. Vinogradov, Yu. I. Bogatova, I. A. Synegub; Translated by Mariya Gelmboldt
R4,239 R3,662 Discovery Miles 36 620 Save R577 (14%) Ships in 12 - 17 working days

This work examines the waters of marine ports as unique integrated aquatic ecosystems. It regards marine ports as entities comprising components of natural and anthropogenic origin, including pelagic, periphytal and benthal subsystems. Using selected Black and Azov Sea ports as examples, the book discusses the hydrodynamics and water exchange, which are weakened in ports compared with open coastal zones. It reflects consequences of the presence of hydrobionts and the accumulation of organic matter, which are promoted by the variety of hard substrata and the absence of fishery. The book is divided into five main chapters. The first chapter describes the general characteristics of the marine ports at the northern coast of the Black and Azov Seas and their shipping channels. Chapters 2 to 4 discuss the main abiotic and biotic peculiarities of the pelagial, periphytal and benthal subsystems of those marine ports, and chapter 5 deals with tropho-dynamic processes in their ecosystems. A concluding section reflects recommendations how the ecosystems of ports in non-tidal seas may be ameliorated.

Basic and Applied Zooplankton Biology (Hardcover, 1st ed. 2019): Perumal Santhanam, Ajima Begum, Perumal Pachiappan Basic and Applied Zooplankton Biology (Hardcover, 1st ed. 2019)
Perumal Santhanam, Ajima Begum, Perumal Pachiappan
R3,595 Discovery Miles 35 950 Ships in 12 - 17 working days

The coastal and ocean ecosystem is a significant feature of our planet and provides a source of food for much of life on Earth. Millions of species have been, and are still being discovered in the world's oceans. Among these zooplankton serve as secondary producers and are significant as they form pelagic food links and act as indicators of water masses. They constitute the largest and most reliable source of protein for most of the ocean's fishes. As such, their absence or depletion often affects fishery. In many countries, the decline in fishery has been attributed to reduced plankton populations. Furthermore, trillions of tiny copepods produce countless faecal pellets contributing greatly to the marine snow and therefore accelerating the flow of nutrients and minerals from the surface waters to the seabed. They are phylogenetically highly successful groups in terms of phylogenetic age, number of living species and success of adaptive radiation. A study of the basic and applied aspects of zooplankton would provide an index of the fishery potential and applications, offering insights into ocean ecology to safeguard food supplies and livelihoods of the millions of people living in coastal areas. For this reason, we need to understand all the facets of zooplankton as well as their interactions with atmosphere and other life forms, including human. In this context, this book discusses the basic and applied aspects of zooplankton, especially taxonomy, mosquitocidal activity, culture, analysis of nutritional, pigments and enzyme profile, preservation of copepods eggs, bioenrichment of zooplankton and application of zooplankton in sustainable aquaculture production, focusing on novel biofloc-copefloc technologies, and the impact of acidification and microplastics on zooplankton. Offering a comprehensive overview of the current issues and developments in the field of environmental and commercial applications, this book is a valuable resource for researchers, aquaculturists, environmental mangers wanting to understand the importance of zooplankton and develop technologies for the sustainable production of fish and other commodities to provide food and livelihoods for mankind.

Developments in Soil Salinity Assessment and Reclamation - Innovative Thinking and Use of Marginal Soil and Water Resources in... Developments in Soil Salinity Assessment and Reclamation - Innovative Thinking and Use of Marginal Soil and Water Resources in Irrigated Agriculture (Hardcover, 2013 ed.)
Shabbir A. Shahid, Mahmoud A. Abdelfattah, Faisal K. Taha
R5,931 Discovery Miles 59 310 Ships in 10 - 15 working days

The papers assembled here cover topics such as technological advances in soil salinity mapping and monitoring, management and reclamation of salt-affected soils, use of marginal quality water for crop production, salt-tolerance mechanisms in plants, biosaline agriculture and agroforestry, microbiological interventions for marginal soils, opportunities and challenges in using marginal waters, and soil and water management in irrigated agriculture.

Fish Protection Technologies and Fish Ways for Downstream Migration (Hardcover, 1st ed. 2020): Ulrich Schwevers, Beate Adam Fish Protection Technologies and Fish Ways for Downstream Migration (Hardcover, 1st ed. 2020)
Ulrich Schwevers, Beate Adam
R3,463 Discovery Miles 34 630 Ships in 10 - 15 working days

This book offers a comprehensive review of current systems for fish protection and downstream migration. It offers the first systematic description of the currently available technologies for fish protection at hydropower intakes, including accurate and timely data collected by the authors and other researchers. It describes how to design and test them in agreement with the guidelines established from the EU Water Framework Directive. The book includes important information about fish biology, with a special focus on swimming and migration mechanisms. It offers a robust bridge between concepts in applied ecology and civil hydraulic engineering, thus providing biologists and hydraulic engineers with an authoritative reference guide to both the theory and practice of fish protection. It is also of interest for planners, public authorities as well as environmental consultants

Deep-Sea Mining - Resource Potential, Technical and Environmental Considerations (Hardcover, 1st ed. 2017): Rahul Sharma Deep-Sea Mining - Resource Potential, Technical and Environmental Considerations (Hardcover, 1st ed. 2017)
Rahul Sharma
R7,500 Discovery Miles 75 000 Ships in 12 - 17 working days

This comprehensive book contains contributions from specialists who provide a complete status update along with outstanding issues encompassing different topics related to deep-sea mining. Interest in exploration and exploitation of deep-sea minerals is seeing a revival due to diminishing grades and increasing costs of processing of terrestrial minerals as well as availability of several strategic metals in seabed mineral resources; it therefore becomes imperative to take stock of various issues related to deep-sea mining. The authors are experienced scientists and engineers from around the globe developing advanced technologies for mining and metallurgical extraction as well as performing deep sea exploration for several decades. They invite readers to learn about the resource potential of different deep-sea minerals, design considerations and development of mining systems, and the potential environmental impacts of mining in international waters.

Fen, Bog and Swamp - A Short History of Peatland Destruction and its Role in the Climate Crisis (Paperback): Annie Proulx Fen, Bog and Swamp - A Short History of Peatland Destruction and its Role in the Climate Crisis (Paperback)
Annie Proulx
R231 Discovery Miles 2 310 Ships in 12 - 17 working days

A BBC Radio 4 Book of the Week ‘Magnificent’ Guardian ‘Remarkable … A compact classic!’ Bill McKibben ‘I learned something new – and found something amazing – on every page’ Anthony Doerr, author of All the Light We Cannot See Fens, bogs, swamps and marine estuaries are the earth’s most desirable and dependable resources. Here, Pulitzer Prize winner Annie Proulx brings her witness and research to the vitally important role they play in preserving the environment, and their systemic destruction in the pursuit of profit. Travelling from the fens of sixteenth-century England to America’s Okefenokee National Wildlife Refuge, Fen, Bog and Swamp is both a revelatory history and an urgent plea for wetland reclamation, from one of our greatest prose stylists. ‘A rousing call to action’ Esquire ‘Sparklingly furious … it has a profoundly positive message’ Richard Mabey, Telegraph ‘This haunting tribute … is a pleasure to read’ Financial Times

Lake Restoration Handbook - A New Zealand Perspective (Hardcover, 1st ed. 2018): David P. Hamilton, Kevin J. Collier, John M... Lake Restoration Handbook - A New Zealand Perspective (Hardcover, 1st ed. 2018)
David P. Hamilton, Kevin J. Collier, John M Quinn, Clive Howard-Williams
R7,343 Discovery Miles 73 430 Ships in 10 - 15 working days

Lakes across the globe require help. The Lake Restoration Handbook: A New Zealand Perspective addresses this need through a series of chapters that draw on recent advances in modelling and monitoring tools, citizen science and First Peoples' roles, catchment and lake-focused restoration techniques, and policy implementation. New Zealand lakes, like lakes across the globe, are subject to multiple pressures that have increased in severity and scale as land use has intensified, invasive species have spread and global climate change becomes manifest. This books builds on the popular Lake Managers Handbook (1987), which provided guidance on undertaking investigations into, and understanding lake ecosystems in New Zealand. The Lake Restoration Handbook: A New Zealand Perspective synthesises contemporary issues related to lake restoration and rehabilitation, integrated with social science and cultural viewpoints, and complemented by authoritative topic-area summaries by renowned scientists and practitioners from across the globe. The book examines the progress of lake restoration and the new and emerging tools available to managers for predicting and effecting change. The book will be a valuable resource for natural and social scientists, policy writers, lake managers, and anyone interested in the health of lake ecosystems.

Water, Power and Politics in the Middle East - The Other Israeli-Palestinian Conflict (Hardcover, New): Jan Selby Water, Power and Politics in the Middle East - The Other Israeli-Palestinian Conflict (Hardcover, New)
Jan Selby
R4,477 Discovery Miles 44 770 Ships in 12 - 17 working days

This original analysis of the Middle East water problems highlights questions and issues which have so far only received minimal attention. The author develops a multi-layered account of the nature and causes of the conflict and the Pealestinian water crisis. Each chapter addresses a particular aspect of the Israeli-Palestine water conflict and the author uses these to illustrate both the broader nature of Israeli-Palestinian relations and factors that the existing water literature underplays or simply gets wrong. The book should interest students, scholars and practitioners in a wide range of disciplines including Middle East studies, politics and international relations, water policy, geography, environmental studies and environmental management.

Aquatic Microbial Ecology and Biogeochemistry: A Dual Perspective (Hardcover, 1st ed. 2016): Patricia M. Glibert, Todd M. Kana Aquatic Microbial Ecology and Biogeochemistry: A Dual Perspective (Hardcover, 1st ed. 2016)
Patricia M. Glibert, Todd M. Kana
R5,899 Discovery Miles 58 990 Ships in 12 - 17 working days

This book highlights perspectives, insights, and data in the coupled fields of aquatic microbial ecology and biogeochemistry when viewed through the lens of collaborative duos - dual career couples. Their synergy and collaborative interactions have contributed substantially to our contemporary understanding of pattern, process and dynamics. This is thus a book by dual career couples about dual scientific processes. The papers herein represent wide-ranging topics, from the processes that structure microbial diversity to nitrogen and photosynthesis metabolism, to dynamics of changing ecosystems and processes and dynamics in individual ecosystems. In all, these papers take us from the Arctic to Africa, from the Arabian Sea to Australia, from small lakes in Maine and Yellowstone hot vents to the Sargasso Sea, and in the process provide analyses that make us think about the structure and function of all of these systems in the aquatic realm. This book is useful not only for the depth and breadth of knowledge conveyed in its chapters, but serves to guide dual career couples faced with the great challenges only they face. Great teams do make great science.

Limnology and Freshwater Ecology (Hardcover): Simon Oakenfold Limnology and Freshwater Ecology (Hardcover)
Simon Oakenfold
R3,558 R3,194 Discovery Miles 31 940 Save R364 (10%) Ships in 10 - 15 working days
Silica Stories (Hardcover, 1st ed. 2017): Christina De La Rocha, Daniel J. Conley Silica Stories (Hardcover, 1st ed. 2017)
Christina De La Rocha, Daniel J. Conley
R1,579 Discovery Miles 15 790 Ships in 12 - 17 working days

Do you know silica, the tetrahedra of silicon and oxygen constituting the crystals of New Agers and the desiccant in a box of new shoes? It's no mere mundane mineral. As chemically reacting silicate rocks, silica set off the chain of events known as the origin of life. As biomineralized opal, it is the cell wall, skeleton, spicules, and scales of organisms ornamenting numerous lobes of the tree of life. Cryptocrystalline silica made into stone tools helped drive the evolution of our hands and our capability for complex grammar, music, and mathematics. As quartz crystals, silica is impressively electric and ubiquitous in modern technology (think sonar, radios, telephones, ultrasound, and cheap but precise watches). Silica is inescapable when we take a drink or mow the lawn and it has already started to save the Earth from the carbon dioxide we're spewing into the atmosphere. This book tells these scientific tales and more, to give dear, modest silica its due.

Paleolimnology - The History and Evolution of Lake Systems (Hardcover, New): Andrew S. Cohen Paleolimnology - The History and Evolution of Lake Systems (Hardcover, New)
Andrew S. Cohen
R6,619 R5,631 Discovery Miles 56 310 Save R988 (15%) Ships in 12 - 17 working days

This text, written by a leading researcher in the field, describes the origin and formation of lakes in order to give context to the question of how lacustrine deposits form. It explains the process of sedimentation in lakes and the chemistry of those deposits and describes how the age of lake deposits is determined. Additionally, this book shows how different groups of fossils are used in interpreting the paleontological record of lakes. In order to illustrate the more synthetic approaches to interpreting the history of lakes, the author also discusses such special topics as lake-level history, lake evolution, and the impact of environmental change on lakes.

Fisheries Resources Economics (Hardcover, 1st ed. 2021): Xinjun Chen Fisheries Resources Economics (Hardcover, 1st ed. 2021)
Xinjun Chen
R4,831 Discovery Miles 48 310 Ships in 12 - 17 working days

Fisheries resources are an important component of natural resources. It is an important source of high-quality animal protein and food for humans, which provides employment, economic benefits and social welfare for people engaged in fishing activities. It also has played an important role in food safety, economic development, and foreign trade. Fisheries resources economics is an important branch of both applied economics and resource economics. Its research object is fishery resources and its economic problems. The economics of fishery resources is to focus on the relationship between the demand for human economic activities and the supply of fishery resources, as well as between fishery resources and its development. This book expounds the reasons for the economic problems of fishery resources and the theoretical principles for solving them, so as to reveal the objective rules of the allocation of fishery resources in different regions and at different times, to coordinate the relationship between the utilization of fishery resources and economic development, and to realize the sustainable development of fishery economy. This book will also provide learning materials for undergraduates, graduate students and practitioners engaged in fishery resources development and scientific management.

The Galapagos Marine Reserve - A Dynamic Social-Ecological System (Hardcover, 2014 ed.): Judith Denkinger, Luis Vinueza The Galapagos Marine Reserve - A Dynamic Social-Ecological System (Hardcover, 2014 ed.)
Judith Denkinger, Luis Vinueza
R4,463 R3,600 Discovery Miles 36 000 Save R863 (19%) Ships in 12 - 17 working days

This book focuses on how marine systems respond to natural and anthropogenic perturbations (ENSO, overfishing, pollution, tourism, invasive species, climate-change). Authors explain in their chapters how this information can guide management and conservation actions to help orient and better manage, restore and sustain the ecosystems services and goods that are derived from the ocean, while considering the complex issues that affect the delicate nature of the Islands. This book will contribute to a new understanding of the Galapagos Islands and marine ecosystems. "

Reef Fish Spawning Aggregations: Biology, Research and Management (Hardcover, 2012): Yvonne Sadovy De Mitcheson, Patrick L.... Reef Fish Spawning Aggregations: Biology, Research and Management (Hardcover, 2012)
Yvonne Sadovy De Mitcheson, Patrick L. Colin
R5,837 Discovery Miles 58 370 Ships in 10 - 15 working days

Reef fish spawning aggregations, ranging from small groups to many tens of thousands of individuals, are spectacular but poorly known natural phenomena whereby fish assemble at specific times and locations to spawn. For some species these large groups may be the only form of reproduction, the high fish numbers briefly giving a false impression of stability and abundance-an 'illusion of plenty'. They are often a focus for intensive seasonal fishing because of their predictability and because many important commercial fishes form them. Highly vulnerable to overexploitation, many aggregations and their associated fisheries, have disappeared or are in decline. Few are effectively managed or incorporated into protected areas. Aggregations are not well understood by fishery scientists, managers and conservationists and their significance little appreciated by fishers or the wider public. To ensure their persistence to replenish important fisheries in coral ecosystems, maintain their ecosystem function and continue to delight divers, a significant change in perspective is needed to foster protection and management. This book provides comprehensive and practical coverage of the biology, study and management of reef fish aggregations, exploring their how, when, where, and why. It explores ways to better protect, study, manage and conserve them, while identifying key data gaps and questions. The text is extensively illustrated with many unique, never before published, photographs and graphics. Case studies on over 20 interesting and important fishes are included, outlining their biology and fisheries and highlighting major concerns and challenges.

Polish River Basins and Lakes - Part II - Biological Status and Water Management (Hardcover, 1st ed. 2020): Ewa Korzeniewska,... Polish River Basins and Lakes - Part II - Biological Status and Water Management (Hardcover, 1st ed. 2020)
Ewa Korzeniewska, Monika Harnisz
R5,780 Discovery Miles 57 800 Ships in 10 - 15 working days

This book reviews the latest research and developments concerning the biodiversity and biocontamination assessment of aquatic ecosystems in Poland. The authors present expert analyses of the current biological status of Polish surface waters, and examine a broad range of elements related to aquatic ecosystems, including macrophytes, phytoplankton, zooplankton and macroinvertebrates, microorganisms, fish, and selected invasive aquatic species. A set of conservation and restoration practices, and a review of protected sites within the Polish basins and catchment areas, are also provided. This book and the companion volume Polish River Basins and Lakes - Part I: Hydrology and Hydrochemistry offer valuable resources for students, environmental chemists, biologists, geologists, hydrologists and surface waters managers interested in the environmental conditions of Poland's surface waters.

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