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Books > Science & Mathematics > Biology, life sciences > Hydrobiology

Conservation of Fish and Shellfish Resources - Managing Diversity (Hardcover): J. E Thorpe, Graham A E Gall, Jim E Lannan,... Conservation of Fish and Shellfish Resources - Managing Diversity (Hardcover)
J. E Thorpe, Graham A E Gall, Jim E Lannan, Colin E. Nash
R1,264 Discovery Miles 12 640 Ships in 12 - 19 working days

Fish and shellfish comprise annually nearly 70-million tons of the world's edible animal protein. However, because of this demand, previously vast stocks have often been exhausted to the point of near extinction. The first book of its kind in the area of freshwater/marine biodiversity, this extensive work reviews the present status of genetic resource management, its needs and constraints, various intervening human factors such as pollution and overfishing, and problems posed by different species and life-styles. This discussion of the conservation of fish and shellfish resources is illustrated by four diverse groups: Atlantic salmon, cupped oysters, common and Chinese carp, and Nile tilapia. These results, produced by the collaboration of nine leading population and production geneticists, aquaculturists, and behavioral and developmental ecologists should become a fundamental resource useful to biologists, scientists and advisors exploring current issues in the fishery sciences.
Key Features
* Four page color plate section
* Database of key organizations for contact purposes
* Foreword by Dr. Mike Strauss, Am. Assoc. for the Advancement of Science; and Dr. Peter Day, Rutgers University
* Four in-depth case studies by international experts
* Editors are major names in marine/freshwater fisheries science
* Originally sponsored and reviewed by U.S. National Academy of Sciences

Intermediate Disturbance Hypothesis in Phytoplankton Ecology - Proceedings of the 8th Workshop of the International Association... Intermediate Disturbance Hypothesis in Phytoplankton Ecology - Proceedings of the 8th Workshop of the International Association of Phytoplankton Taxonomy and Ecology held in Baja (Hungary), 5-15 July 1991 (Hardcover, Reprinted from HYDROBIOLOGIA, 249, 1993)
Judit Padisak, Colin S. Reynolds, U. Sommer
R4,530 Discovery Miles 45 300 Ships in 10 - 15 working days

This volume gives an insight into what a group of contemporary plankton biologists think about the utility, virtues, strengths and theoretical and practical weaknesses of J.H. Connell's Intermediate Disturbance Hypothesis within the context of phytoplankton ecology. The sequence of papers in this volume moves from particular case studies to more general and finally theoretical approaches.

Alboran Sea - Ecosystems and Marine Resources (Hardcover, 1st ed. 2021): Jose Carlos Baez, Juan-Tomas Vazquez, Juan Antonio... Alboran Sea - Ecosystems and Marine Resources (Hardcover, 1st ed. 2021)
Jose Carlos Baez, Juan-Tomas Vazquez, Juan Antonio Caminas, Mohammed Malouli Idrissi
R5,309 Discovery Miles 53 090 Ships in 10 - 15 working days

The Alboran Sea represents a regional Mediterranean space where North and South worlds merges, creating a geopolitical region where marine resources and maritime activities should be managed from a national and international perspectives. It is widely known, that currently the planet is suffering a global change, and it is also affecting the Alboran Sea, its ecosystems and populations. An important first step to update a paramount vision on this region is to understand the climatic, geologic and oceanographic, including biochemical cycles, process which shapes the rich geodiversity, biodiversity, the productivity, and the sustainable use of the marine resources from Alboran Sea. The fisheries management system should take into account marine environmental variability to achieve biological sustainability of marine resources. Well-funded policy-makers' decisions require a sound science based knowledge of the interaction between the marine environment and commercial stocks. This is because the role of marine environment in the evolution of fish stocks is sometimes even more important than the one played by fishers in the commercial exploitation of them. Finally, we should analyze the different aspects of political context that could affect the management of the resources from Alboran Sea in the context of climate change. This book reviews different aspects of the Alboran Sea to help understand the current situation from the original Tethis Ocean. The book is divided into four blocks: (i) Oceanographic, geological and ecological context (chapters 2 to 7), (ii) biodiversity and ecosystems distribution (chapters 8 to 12), (iii) fisheries resources and aquaculture (chapters 13 to 20), and (iv) conservation, management and marine polices (chapters 21 to 25).

Meiobenthology - The Microscopic Motile Fauna of Aquatic Sediments (Hardcover, 2nd ed. 2009): Olav Giere Meiobenthology - The Microscopic Motile Fauna of Aquatic Sediments (Hardcover, 2nd ed. 2009)
Olav Giere
R5,681 Discovery Miles 56 810 Ships in 10 - 15 working days

Meiobenthology is the science of the tiny animals that live in huge numbers in all aquatic sediments. This fully revised and enlarged second edition emphasizes new discoveries and developments in this field. Major progress has been made in three general areas: - Systematics, diversity and distribution, - Ecology, food webs, and energy flow, - Environmental aspects, including studies of anthropogenic impacts.

The meiobenthos of polar and tropical regions, deep-sea bottoms and hydrothermal vents are now studied in more detail. The high number of species found to survive under such extreme conditions puts them at the forefront of biodiversity studies. Molecular screening methods enable large numbers to be analyzed upon applying reasonable effort. The aim of this book is to synthesize these modern scientific achievements such that meiobenthology can play a key role in aquatic research and in assessing the health of our environment.

The Microbiology of Cooling Water (Hardcover): James W McCoy The Microbiology of Cooling Water (Hardcover)
James W McCoy
R3,783 Discovery Miles 37 830 Ships in 10 - 15 working days

McCoy's guide to the maintenance and management of cooling water systems and the bacteria that live in them. Includes studies and testing of microbicides and other microorganisms that infest re-circulating cooling water systems and factors influencing their health and growth. Tests biological oxidation processes as a way of reusing treated effluents as an important method of water conservation in the petroleum refining and chemical processing industries. Explores practical methods for controlling microorganisms in cooling water; including working with chlorine dioxide as a microbicide. Methods are given for identifying and evaluating toxicants and bacteria that lead to fouling and staining of cooling water systems.

Frontiers of Shrimp Research, Volume 22 (Hardcover): P.F. DeLoach, M.A. Davidson, W.J. Dougherty Frontiers of Shrimp Research, Volume 22 (Hardcover)
P.F. DeLoach, M.A. Davidson, W.J. Dougherty
R6,088 Discovery Miles 60 880 Ships in 10 - 15 working days

Shrimps are subject to great consumer demand in the United States. However, more than #1 billion worth of shrimp is now imported; more than twice the amount produced domestically. Domestic shrimp production, mostly from the trawler fleet in the Gulf of Mexico, is thought to be at its maximum sustainable yield of 91,000 MT (heads-off). Increased production of shrimp in the U.S. through mariculture has been motivated by the increasing demand for this product.
The biology of penaeid shrimp and lack of technology for their culture present special problems in fisheries science, reproductive biology, endocrinology, nutrition, pathology, culture science and future research. The purpose of the Frontiers of Shrimp Research symposium was to assess the status of shrimp research in these areas and to further foster the scientific collaboration vital for significant research advances. The participants included representatives of the science funding agencies, the mariculture industry and representatives of both the scientific research and science policy communities.
The subject matter should be of interest to a variety of readers. Advanced undergraduate/graduate students, mariculturists and research workers will find this volume both interesting and informative.

Nutrients and Eutrophication in Estuaries and Coastal Waters (Hardcover): Emma Orive, M. Elliott, Victor N. de Jonge Nutrients and Eutrophication in Estuaries and Coastal Waters (Hardcover)
Emma Orive, M. Elliott, Victor N. de Jonge
R5,768 Discovery Miles 57 680 Ships in 10 - 15 working days

This volume focuses on the nutrient and organic matter inputs in estuaries and other coastal ecosystems, their effects on geochemistry and community structure and possibilities for recovery of the systems to a trophic state that is beneficial for man and nature.
The book provides many examples of the effects of the enhanced supply of nutrients and organic matter on the chemical features of the water and on the structure, metabolism and trophic pathways of the biological communities.
Also included are several case studies providing considerable insight into the response of the different coastal ecosystems to long term changes in the trophic state of the water.
Current knowledge on modeling as a tool to manage the trophic state of the coastal ecosystems is also dealt with, making this book one of interests to scientist and students as well as managers.

Polish River Basins and Lakes - Part I - Hydrology and Hydrochemistry (Hardcover, 1st ed. 2020): Ewa Korzeniewska, Monika... Polish River Basins and Lakes - Part I - Hydrology and Hydrochemistry (Hardcover, 1st ed. 2020)
Ewa Korzeniewska, Monika Harnisz
R8,334 Discovery Miles 83 340 Ships in 10 - 15 working days

This book offers a comprehensive review of the current environmental conditions and chemical changes in Polish surface waters. Poland is situated in an area that was covered by glaciations in the distant past. The subsequent periods of glacial advance and retreat produced a continuous rejuvenation of the landscape, and the discharge of surplus water from this area was constantly transformed by morphological, climatic and hydrological changes. Written by expert contributors, the book's respective chapters address the impact of current climatic conditions on the functioning of surface water reservoirs in Poland, while also exploring the country's hydrographic and hydrological network and the trophic state of its rivers and lakes, their eutrophication and threats. Particular attention is paid to sources of pollution, above all, the chemical pollution of water and sediments. Together with the companion book Polish River Basins and Lakes - Part II: Biological Status and Water Management, it provides students, environmental chemists, biologists, geologists, hydrologists and surface waters managers with authoritative information on Poland's current environmental status.

Asia-Pacific Conference on Science and Management of Coastal Environment - Proceedings of the International Conference held in... Asia-Pacific Conference on Science and Management of Coastal Environment - Proceedings of the International Conference held in Hong Kong, 25-28 June 1996 (Hardcover, Reprinted from HYDROBIOLOGIA, 352)
Yuk-Shan Wong, Nora Fung-Yee Tam
R4,615 Discovery Miles 46 150 Ships in 10 - 15 working days

Human beings have a long historical relationship with the coast. Initially it provided food and security, later forming important locations for industrial and commercial development. Now the emphasis has shifted towards leisure and conservation, although the former functions remain crucial. However, it is only very recently that people have started viewing the coast as a common and valuable resource that requires rational utilisation and scientific management in order to sustain its attractiveness. Of course, enlightened management comes only through understanding of the complicated coastal regions, which enables coastal managers to balance pressures from different sectors and to minimize risks. Scientific knowledge will continue to be the most important basis for resolving the conflicts between coastal users and interest groups such as developers and ecologists. Coastal management has also shifted from traditional restorative or remedial actions towards planned avoidance of other conflicts. Despite rapid advancement in coastal sciences over recent decades, most of the major coastal issues have remained outstanding in the agenda. Control of shoreline erosion and protecting sea level rise continue to be crucial problems facing coastal scientists. Destructive coastal storms still cause tremendous damage, particularly in low altitudes. Wetland and estuary reclamation have led to the loss of the most valuable estuary wetlands which are required to sustain biological productivity and biodiversity. This volume includes papers on marine and coastal pollution, eutrophication, aquaculture, conservation and utilization, coastal wetlands, and coastal zone management.

Hydration Processes in Biology - Theoretical and Experimental Approaches (Hardcover): M-.C.Bellossent- Funel Hydration Processes in Biology - Theoretical and Experimental Approaches (Hardcover)
M-.C.Bellossent- Funel
R2,751 Discovery Miles 27 510 Ships in 12 - 19 working days

The interaction of water at organic surfaces or interfaces is of fundamental and technological interest and importance in chemistry, physics and biology. Progress towards an in-depth, molecular interpretation of the structure and dynamics of interfacial water needs a range of novel experimental and simulation techniques. We are now reaching the stage at which we understand, at the molecular level, the mutual perturbation at a macromolecule/water interface. The aims of this book are to provide with a comprehensive background to the properties of bulk water at the microscopic level and with a substantial account of the theoretical and experimental contributions which have been done to understand the role of water in various systems from some model systems to the more complex ones such as the biological systems.

The Ecological Status of European Rivers: Evaluation and Intercalibration of Assessment Methods (Hardcover, Reprinted from... The Ecological Status of European Rivers: Evaluation and Intercalibration of Assessment Methods (Hardcover, Reprinted from HYDROBIOLOGIA volume 566)
Mike T. Furse, Daniel Hering, Karel Brabec, Andrea Buffagni, Leonard Sandin, …
R6,045 Discovery Miles 60 450 Ships in 10 - 15 working days

The monitoring of benthic diatoms, macrophytes, macroinvertebrates and fish will be the backbone of future water management in Europe. This book describes and compares the relevant methodologies and tools, based on a large data set covering rivers in most parts of Europe. The 36 articles presented will provide scientists and water managers with a unique insight into background and application of state-of-the-art monitoring tools and techniques.

Primary Productivity and Biogeochemical Cycles in the Sea (Hardcover, 1992 ed.): Paul G. Falkowski, Avril D. Woodhead Primary Productivity and Biogeochemical Cycles in the Sea (Hardcover, 1992 ed.)
Paul G. Falkowski, Avril D. Woodhead
R8,611 Discovery Miles 86 110 Ships in 10 - 15 working days

Biological processes in the oceans play a crucial role in regulating the fluxes of many important elements such as carbon, nitrogen, sulfur, oxygen, phosphorus, and silicon. As we come to the end of the 20th century, oceanographers have increasingly focussed on how these elements are cycled within the ocean, the interdependencies of these cycles, and the effect of the cycle on the composition of the earth's atmosphere and climate. Many techniques and tools have been developed or adapted over the past decade to help in this effort. These include satellite sensors of upper ocean phytoplankton distributions, flow cytometry, molecular biological probes, sophisticated moored and shipboard instrumentation, and vastly increased numerical modeling capabilities. This volume is the result of the 37th Brookhaven Symposium in Biology, in which a wide spectrum of oceanographers, chemists, biologists, and modelers discussed the progress in understanding the role of primary producers in biogeochemical cycles. The symposium is dedicated to Dr. Richard W. Eppley, an intellectual giant in biological oceanography, who inspired a generation of scientists to delve into problems of understanding biogeochemical cycles in the sea. We gratefully acknowledge support from the U.S. Department of Energy, the National Aeronautics and Space Administration, the National Science Foundation, the National Oceanic and Atmospheric Administration, the Electric Power Research Institute, and the Environmental Protection Agency. Special thanks to Claire Lamberti for her help in producing this volume.

Deep - Freediving, Renegade Science and What the Ocean Tells Us About Ourselves (Paperback, Main): James Nestor Deep - Freediving, Renegade Science and What the Ocean Tells Us About Ourselves (Paperback, Main)
James Nestor 1
R383 R352 Discovery Miles 3 520 Save R31 (8%) Ships in 12 - 19 working days

From the author of the international Bestseller Breath Covering a diving championship in Greece on a hot and sticky assignment for Outside magazine, James Nestor discovered free diving. He had stumbled on one of the most extreme sports in existence: a quest to extend the frontiers of human experience, in which divers descend without breathing equipment, for hundreds of feet below the water, for minutes after they should have died from lack of oxygen. Sometimes they emerge unconscious, or bleeding from the nose and ears, and sometimes they don't come up at all. The free divers were Nestor's way into an exhilarating and dangerous world of deep-sea pioneers, underwater athletes, scientists, spear fishermen, billionaires and ordinary men and women who are poised on the brink of some amazing discoveries about the ocean. Soon he was visiting the scientists who live 60ft underwater (and are permanently high on nitrous dioxide), swimming with the notorious man-eating sharks of Reunion and descending thousands of feet in a homemade submarine. And on the way down, he learnt about the amazing amphibious reflexes activated in the human body under deep-water conditions, why dolphins were injected with LSD in an attempt to teach them to talk, and why sharks like AC/DC. The sea covers seventy per cent of Earth's surface, and still contains answers to questions about the world we are only beginning to ask: Deep blends science and adventure to uncover its amazing secrets.

Pelagic Nutrient Cycles - Herbivores as Sources and Sinks (Hardcover, 1997 ed.): Tom Andersen Pelagic Nutrient Cycles - Herbivores as Sources and Sinks (Hardcover, 1997 ed.)
Tom Andersen
R4,519 Discovery Miles 45 190 Ships in 10 - 15 working days

An analysis of the interactions between pelagic food web processes and element cycling in lakes. While some findings are examined in terms of classical concepts from the ecological theory of predator-prey systems, special emphasis is placed on exploring how stoichiometric relationships between primary producers and herbivores influence the stability and persistence of planktonic food webs. The author develops simple dynamic models of the cycling of mineral nutrients through plankton algae and grazers, and then goes on to explore them both analytically and numerically. The results thus obtained are of great interest to both theoretical and experimental ecologists. Moreover, the models themselves are of immense practical use in the area of lake management.

Saline Lakes - Publications from the 7th International Conference on Salt Lakes, held in Death Valley National Park,... Saline Lakes - Publications from the 7th International Conference on Salt Lakes, held in Death Valley National Park, California, U.S.A., September 1999 (Hardcover, New edition)
John M. Melack, Robert Jellison, David B. Herbst
R4,447 Discovery Miles 44 470 Ships in 10 - 15 working days

Inland saline waters are threatened worldwide by diversion and pollution of their inflows, introductions of exotic species and economic development of these ecologically valuable habitats. Since 1979 a series of international symposia on inland saline waters has served to strengthen and expand the scope of limnological research on inland saline waters. The seventh conference continued this tradition and the papers derived from the conference focused on the ecology of microbial communities, the influence of habitat geochemistry on biogeography of flora and fauna, physical and geochemical processes, and the conservation of inland saline waters. Of particular note are papers on Walker Lake, Nevada (USA), and the Salton Sea and Mono Lake, California (USA). Continued local, national and international efforts are required to inform the public and decision-makers about the environmental problems faced by saline waters. The papers in this volume will serve this end and should be of interest to aquatic ecologists, limnologists, aquaculturalists, and water resource managers.

Marine Biotechnology I (Hardcover, 2005 ed.): Yves Le Gal, Roland Ulber Marine Biotechnology I (Hardcover, 2005 ed.)
Yves Le Gal, Roland Ulber
R8,456 Discovery Miles 84 560 Ships in 10 - 15 working days

This review series covers trends in modern biotechnology, including all aspects of this interdisciplinary technology, requiring knowledge, methods, and expertise from chemistry, biochemistry, microbiology, genetics, chemical engineering and computer science.

The Pantanal of Mato Grosso (Brazil) - World's Largest Wetlands (Hardcover, 1995 ed.): F.D. Por The Pantanal of Mato Grosso (Brazil) - World's Largest Wetlands (Hardcover, 1995 ed.)
F.D. Por
R4,420 Discovery Miles 44 200 Ships in 10 - 15 working days

For a naturalist and limnologist, the Pantanal has the extreme fascination of an "ultima Thule" ofundisturbed and little known wilderness. The scientific world at large is almost unaware of its richness. In an age when scientific research is overstretched because of lack of funds and the hands are full of urgentconservationtasks, it is the amateurtourist who unveils the beauty and the interestof this largest wetland ofthe world. I had the privilege of an outsider, well enough familiarized with Brazil, its language and scientific life, but independent enough of the daily chores of a local academic career. For nearly 20 years I have been a faithful sci- entific tourist to this subcontinent. My academic liberty gave me the unique opportunity to try to synthesize in English the knowledge about Brazilian environments little known abroad. My first suchendeavourhas been"Soore- tama - the Atlantic Rain Forest of Brazil". Dealing now with the Pantanal, I wish to pay tribute to the many Brazilian colleagues who under dire and often precarious conditions have advanced the knowledge related to the Pan- tanal. By reviewing their many reports and papers written in Portuguese and bringing them to the knowledge of the international scientific community, I believe that I am doing a useful service. First of all, I have to thank Prof. Vera Lucia Imperatriz Fonseca, the Head of the Department of General Ecology at the University of Sao Paulo, for providingme during the years, the academic basefrom which I couldoperate.

Biodiversity in Enclosed Seas and Artificial Marine Habitats - Proceedings of the 39th European Marine Biology Symposium, held... Biodiversity in Enclosed Seas and Artificial Marine Habitats - Proceedings of the 39th European Marine Biology Symposium, held in Genoa, Italy, 21-24 July 2004 (Hardcover, 2007 ed.)
G. Relini, J. Ryland
R5,815 Discovery Miles 58 150 Ships in 10 - 15 working days

The main themes of the Symposium were biodiversity in enclosed and semi-enclosed seas and artificial habitats, and the restoration of degraded systems. These themes are highly relevant today. The papers dealing with the first theme represent current research and concerns about marine biodiversity in enclosed seas. The papers in the second theme represent a synthesis of up-to-date knowledge on artificial habitats.

A Systems Analysis of the Baltic Sea (Hardcover, 2001): F. V. Wulff, L.A. Rahm, P. Larsson A Systems Analysis of the Baltic Sea (Hardcover, 2001)
F. V. Wulff, L.A. Rahm, P. Larsson
R5,679 Discovery Miles 56 790 Ships in 10 - 15 working days

During recent decades, large-scale effects of pollution on marine estuaries and even entire enclosed coastal seas have become apparent. One of the first regions where this was observed is the Baltic Sea, whereby the appearance of anoxic deep basins, extensive algal blooms and elimination of top predators like eagles and seals indicated effects of both increased nutrient inputs and toxic substances.
This book describes the physical, biochemical and ecological processes that govern inputs, distribution and ecological effects of nutrients and toxic substances in the Baltic Sea. Extensive reviews are supplemented by budgets and dynamic simulation models.
This book is highly interdisciplinary and uses a systems approach for analyzing and describing a marine ecosystem. It gives an overview of the Baltic Sea, but is useful for any marine scientist studying large marine ecosystems.

Recruitment, Colonization and Physical-Chemical Forcing in Marine Biological Systems - Proceedings of the 32nd European Marine... Recruitment, Colonization and Physical-Chemical Forcing in Marine Biological Systems - Proceedings of the 32nd European Marine Biology Symposium, held in Lysekil, Sweden, 16-22 August 1997 (Hardcover, Reprinted from HYDROBIOLOGIA, 1999)
Susanne Baden, Leif Pihl, Rutger Rosenberg, Jarl-Ove Stroemberg, Ib Svane, …
R4,461 Discovery Miles 44 610 Ships in 10 - 15 working days

The 32nd European Marine Biology Symposium was held in Lysekil, Sweden on August 16-22, 1997, organised by Kristineberg Marine Research Station. The selected topics were: `Recruitment and colonisation' and `Physical and Chemical Forcing on Marine Biological Systems', partly reflecting the present research interests at Kristineberg. In this volume, recruitment and colonisation processes cover primarily the dynamics of interspecific interactions within assemblages as well as the effects of hydrodynamic variables. Both laboratory and field studies are emphasised. The contribution of papers within the topic `Physical and Chemical Forcing on Marine Biological Systems' deals with structuring effects of, for example, tides, temperatures, nutrients and hypoxia on the physiology and ecology of marine organisms. The book covers many aspects of marine life. It is our hope that the selected topics will fascinate readers and be of wide interest to students and researchers in marine biology.

Plankton Communities (Hardcover): Leonel Pereira, Ana Marta Goncalves Plankton Communities (Hardcover)
Leonel Pereira, Ana Marta Goncalves
R3,341 Discovery Miles 33 410 Ships in 10 - 15 working days
Life at Interfaces and Under Extreme Conditions - Proceedings of the 33rd European Marine Biology Symposium, held at... Life at Interfaces and Under Extreme Conditions - Proceedings of the 33rd European Marine Biology Symposium, held at Wilhelmshaven, Germany, 7-11 September 1998 (Hardcover, Reprinted from HYDROBIOLOGIA, 426, 2000)
Gerd Liebezeit, Sabine Dittmann, Ingrid Kroencke
R4,402 Discovery Miles 44 020 Ships in 10 - 15 working days

Interfaces between media, whether air-water or sediment-water interfaces or organisms themselves, pose considerable problems to marine organisms attempting to live at these boundaries. In the present volume, a number of authors address various aspects of these two topics. Locations under scrutiny range from intertidal areas to the deep sea, while both macro-and meiofaunal organisms are investigated. Distribution patterns and effects of variable temperatures, pressures, and salinities are analysed. Aspects of fouling induction and prevention are also addressed. This book is intended as a progress report from the 33rd European Marine Biology Symposium held in Wilhelmshaven, Germany, in September 1998.

Biology of the Baltic Sea - Proceedings of the 17th BMB Symposium, 25-29 November 2001, Stockholm, Sweden (Hardcover, 2004... Biology of the Baltic Sea - Proceedings of the 17th BMB Symposium, 25-29 November 2001, Stockholm, Sweden (Hardcover, 2004 ed.)
Hans Kautsky, Pauli Snoeijs
R5,816 Discovery Miles 58 160 Ships in 10 - 15 working days

The present text compiles the latest research within the field of biology performed in the Baltic Sea area. The themes span from theoretical and philosophical aspects of the ecosystem concept over population and autecological studies to detailed descriptions of plant and animal physiology. Results from microcosm and mesocosm experiments as well as direct observations in field together bring insight of the special structure and function of the Baltic Sea ecosystem. How the spawning success of cod and spat are dependent of each other and environmental factors, the impact of alien species to the composition of plankton or benthic communities, the flip of phytobenthic to planktonic communities in lagoons and mechanisms triggering the change, pure descriptions of e.g. the Estonian coast and shallow off shore areas as well as strategies for the reproductive success of Fucus vesiculosus, and the influence of eutrophication of the different Baltic Sea areas and the fate of pollutants as radionucleids and PAH etc. and other themes are all discussed in the 24 original papers of this volume.

Biogeochemical Cycling and Sediment Ecology (Hardcover, 1999 ed.): J. Gray, William Ambrose Jr., Anna Szaniawska Biogeochemical Cycling and Sediment Ecology (Hardcover, 1999 ed.)
J. Gray, William Ambrose Jr., Anna Szaniawska
R4,491 Discovery Miles 44 910 Ships in 10 - 15 working days

Oceanographic discontinuities (e. g. frontal systems, upwelling areas, ice edges) are often areas of enhanced biological productivity. Considerable research on the physics and biology of the physical boundaries defining these discontinues has been accomplished (see [I D. The interface between water and sediment is the largest physical boundary in the ocean, but has not received a proportionate degree of attention. The purpose of the Nato Advanced Research Workshop (ARW) was to focus on soft-sediment systems by identifying deficiencies in our knowledge of these systems and defining key issues in the management of coastal sedimentary habitats. Marine sediments play important roles in the marine ecosystem and the biosphere. They provide food and habitat for many marine organisms, some of which are commercially important. More importantly from a global perspective, marine sediments also provide "ecosystem goods and services" [2J. Organic matter from primary production in the water column and contaminants scavenged by particles accumulate in sediments where their fate is determined by sediment processes such as bioturbation and biogeochemical cycling. Nutrients are regenerated and contaminants degraded in sediments. Under some conditions, carbon accumulates in coastal and shelf sediments and may by removed from the carbon cycle for millions of years, having a potentially significant impact on global climate change. Sediments also protect coasts. The economic value of services provided by coastal areas has recently been estimated to be on the order of $12,568 9 10 y" [3J, far in excess of the global GNP.

Phytoplankton and Trophic Gradients - Proceedings of the 10th Workshop of the International Association of Phytoplankton... Phytoplankton and Trophic Gradients - Proceedings of the 10th Workshop of the International Association of Phytoplankton Taxonomy & Ecology (IAP), held in Granada, Spain, 21-29 June 1996 (Hardcover, Reprinted from HYDROBIOLOGIA, 1998)
M.Alvarez- Cobelas, Colin S. Reynolds, P. Sanchez-Castillo, Jorgen Kristiansen
R4,676 Discovery Miles 46 760 Ships in 10 - 15 working days

These proceedings deal with the relationship between species composition of freshwater phytoplankton and the trophic gradient. Particular regard is paid to the composite question, what lives where and why? Overview papers report the state of the art and suggest that the trophic spectrum appears to be a probabilistic outcome of several dimensions of variability that impinge upon phytoplankton species selection. Studies on community structure span all latitudes from those of Antarctica to equatorial Brazil, and also include reports on light and nutrient gradients, pH and fish-stock effects on species composition. Seasonal and longterm phytoplankton dynamics in lakes of varying trophic status are also considered. Finally, studies on the taxonomy and autoecology of some groups (e.g. Volvocales, Chrysophytes and Euglenophytes) living at the extremes of the trophic spectrum contribute to our knowledge of this usually neglected phytoplankton. This is the first time that a book covers such a topic, and it will prove an excellent source of information to anyone working on phytoplankton ecology and ecological indicators. Limnologists in general, algologists and the technical staff at water authorities will all benefit by reading this book.

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