By R. S. K. Barnes
This confirmed textbook keeps to supply a accomplished and stimulating advent to marine ecological options and tactics. according to a wealth of overseas instructing services, An advent to Marine Ecology is written to be the root for a whole undergraduate direction in marine biology or ecology. It covers the trophic, environmental and aggressive interactions of marine organisms, and the results of those at the productiveness, dynamics and constitution of marine structures. The power of the ebook lies in its dialogue of middle themes which continues to be on the center of nearly all of classes within the topic, regardless of an expanding emphasis on extra utilized points. The authors continue the culture of readability and conciseness set via past variations, and the textual content is widely illustrated with color plates, images and diagrams. Examples are drawn from world wide. 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 entirely 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 strategy according to present instructing. New chapters on fisheries, the marine surroundings, conservation and toxins. in line with a confirmed and winning direction constitution.
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Additional info for An Introduction to Marine Ecology
4 The oceanic floor, usually termed the 'abyssal plain'. 5 The mid-oceanic ridgesvast mountain chains rising from the abyssal plain to within 2000 m or so of the surface (and occasionally breaking surface in the form of mid-oceanic islands). 6 The 'hadal regions' of the deep-ocean trencheschasms in the abyssal plain descending from 6000 m to, in several cases, below 10 000 m. The waters cradled within the continental slopes and the deep ocean floor are differentiated from the coastal neritic waters by being termed 'oceanic' (see Fig.
The following pages set out to introduce the reader to this body of knowledge and to present what currently appear to be the outlines of the ecology of the seas. 2 The Nature of the Ocean. We have already considered the basic shape of the crustal container housing the world's ocean and we must now put rather more flesh on these bones and describe those aspects of oceanic structure and those properties of sea-water that have a particular Page 3 bearing on marine ecology. The study of marine science in generaloceanographyis, of course, a large field embracing physics, chemistry, geology and several other disciplines besides biology; here we must be very selective and many only marginally relevant topics cannot be covered.
But some bacteria can produce organic materials quite independently of photosynthesis. Reduced sulphur compounds issuing from submarine volcanic ventsfumarolesare used as energy sources by some sulphur bacteria in their fixation of dissolved carbon dioxide. Such chemosynthetic bacteria are also symbiotic in various gutless nematodes, oligochaetes, pogonophorans and bivalve molluscs associated with sulphur-rich marine microhabitats, and provide their only known source of food materials (some 50% of the carbon fixed chemosynthetically passing to the host).