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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Vertical Migration One of the more puzzling phenomena in the sea is the vertical
migration of zooplankton. Vertical migration is the name given to the daily
migration of certain zooplankton organisms down into the depths during daylight
These studies have demonstrated that in systems with few or no visual predators,
vertical migration is lacking; whereas in those systems with such predators,
vertical migration is common. Ohman (1990), however, has demonstrated that the
In summary, it can be stated that vertical migration is a worldwide phenomenon of
certain zooplankton. The stimulus is primarily light, although it may be modified
by other factors, such as temperature. Diel migration occurs most commonly in ...
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H A P T E R
SOME ECOLOGICAL PRINCIPLES
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