Marine Biology: An Ecological Approach
Appropriate for undergraduate majors and graduate students in marine biology and marine ecology, Marine Biology: An Ecological Approach emphasizes the ecological principles that govern marine life throughout all environments within the world's oceans. Its unique ecological approach adds real-world relevance by exploring how organisms interact within their individual ecosystems. The text is organized by habitat and each habitat receives detailed, in-depth coverage, giving instructors flexibility to focus on their particular areas of interest. The Fifth Edition is fully updated with the latest research data and topics, including expanded coverage of the human impact on oceans, oceanic dead zones, and coral reefs. In addition to Nybakken's engaging writing style, the text now offers enhanced pedagogy with new end-of-chapter summaries, a new four-color design to complement the art program, an art CD-ROM for instructors, and a text specific Companion Web site.
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The entire area of the open water is the pelagic realm; pelagic organisms are
those that live in the open sea away from the bottom. This is in contrast to the
benthic realm, which is a general term referring to organisms and zones of the
1,200 Aphotic K– Dysphotic — Photic 10-11 10-9 10-7 10-5 10-3 10-1 101 103
105 TA B L E 4.1 Deep-Sea Faunal Zones Light Pelagic Zones Depth Range
Benthic Zones Depts Range FIGURE 4.2 Two types of deep-sea sampling gear.
(a) (b) (c) deep-sea pelagic zones, we know the most about it. The numbers of
organisms appear to be the highest of all the deep-sea pelagic zones. This zone
extends down to about 700–1,000 m, the depth varying with location, clarity of ...
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H A P T E R
SOME ECOLOGICAL PRINCIPLES
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