Get An Introduction to Marine Ecology PDF

Get An Introduction to Marine Ecology PDF

By R. S. K. Barnes

ISBN-10: 0632060581

ISBN-13: 9780632060580

ISBN-10: 0865428344

ISBN-13: 9780865428348

This validated textbook keeps to supply a entire and stimulating advent to marine ecological techniques and methods. in accordance with a wealth of foreign educating services, An creation to Marine Ecology is written to be the foundation for a complete undergraduate direction in marine biology or ecology. It covers the trophic, environmental and aggressive interactions of marine organisms, and the consequences of those at the productiveness, dynamics and constitution of marine structures. The energy of the publication lies in its dialogue of middle subject matters which is still on the middle of the vast majority of classes within the topic, regardless of an expanding emphasis on extra utilized facets. The authors continue the culture of readability and conciseness set through past variations, and the textual content is generally illustrated with color plates, photos and diagrams. Examples are drawn from around the world. during this variation, the clinical content material of the textual content has been absolutely revised and up to date. An emphasis has been put on human affects, and fully new chapters were extra on fisheries, marine ecosystems, and human interference and conservation. thoroughly revised and up-to-date with a twofold raise within the variety of illustrations. Adopts a extra utilized technique in accordance with present instructing. New chapters on fisheries, the marine environment, conservation and toxins. in response to a confirmed and profitable path constitution.

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As the water in contact with the element is warmed so it becomes less dense and rises, thereby allowing more, cooler water to replace it and be heated in turn. The heating process operates on convection currents which would not form if the element was positioned near the surface of the water mass. But, discounting geothermal sources, this is precisely the situation with respect to the source of heat and the oceans. The surface waters of the sea receive heat from the Sun; therefore they become less dense and float at the surface; therefore they receive yet more heat; and so on.

We know most about life in shallow, coastal waters and about the relatively slow-moving and small- to medium-sized organisms; we know least of life in the depths and of the smallest and largest, fastest-moving species. The reason for the depth limitation is self-evident. Note also, however, that fish population densities at depth are low1 per 1000 m3 for exampleand this imposes severe sampling problems. That relating to size of organism is not immediately obvious and is often overlooked. Most ecological information is still obtained from the sea by use of nets or by washing samples through a sieve, although the use of scuba techniques and minisubmersible craft has increased dramatically.

Com Page v Contents Preface vii 1 The Nature and Global Distribution of Marine Organisms, Habitats and Productivity 1 2 The Planktonic System of Surface Waters 30 3 The Benthos of Continental Shelf and Littoral Sediments 54 4 Salt-Marshes, Mangrove-Swamps and Sea-Grass Meadows 77 5 Rocky Shores and Kelp Forests 85 6 Coral Reefs 117 7 Pelagic and Benthic Systems of the Deep Sea 142 8 Fish and Other Nekton 150 9 Ecology of Life Histories 180 10 Speciation and Biogeography 207 11 The Marine Ecosystem as a Functional Whole 222 12 Human Interference and Conservation 238 References 257 Index 270 Page vii Preface The first two editions of this book were aimed at students with some knowledge of ecology who were about to venture into the mare incognitum for the first time.

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An Introduction to Marine Ecology by R. S. K. Barnes

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