By R. S. K. Barnes
This tested textbook keeps to supply a accomplished and stimulating advent to marine ecological strategies and tactics. according to a wealth of overseas educating services, An advent to Marine Ecology is written to be the root for a complete undergraduate path 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 platforms. The power of the e-book lies in its dialogue of middle themes which is still on the middle of the vast majority of classes within the topic, regardless of an expanding emphasis on extra utilized elements. The authors retain the culture of readability and conciseness set by means of past versions, and the textual content is widely illustrated with color plates, photos and diagrams. Examples are drawn from around the world. during this version, 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 additional on fisheries, marine ecosystems, and human interference and conservation. thoroughly revised and up to date with a twofold elevate within the variety of illustrations. Adopts a extra utilized strategy based on present instructing. New chapters on fisheries, the marine atmosphere, conservation and toxins. in keeping with a confirmed and profitable direction constitution.
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Extra resources for An Introduction to Marine Ecology
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.
This is not to say that the land occupies that proportion of the surface, however, for, as we have seen, the sides and parts of the rims of the continents are below sea-level. Today, some 73% of the continental surface area projects above the waves and so the sea in total accounts for 70% of the Earth's 510 × 106 km2 surface59% being that covering the ocean floor plus 11% over the submerged continental margins. The surface area of the continental masses appears more or less constant and so, Page 2 therefore, is that of the ocean floor.
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). Equivalent chemosynthesis-dependent communities occur around seeps of unheated water and of petroleum.
An Introduction to Marine Ecology by R. S. K. Barnes