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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FIGURE 6.40 Some representative New England sand flat benthic invertebrates,.
FIGURE 6.39 Endogenous activity rhythms of the semiterrestrial isopod Tylos.
Tylos is active only during low tide Beaches As Ecoystems, eds. A. McLachlan &
We can summarize this section by stating that the macrofauna of intertidal sand
flats displays high temporal and spatial variability. The total numbers of species
and individuals may vary by several orders of magnitude within and between ...
Protected Sand flats are much less variable and usually consist of fine sand
grains at all times. A second important physical factor on sand beaches and flats
is the wave-induced substrate motion. Within the continuum of grain size, slope,
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H A P T E R
SOME ECOLOGICAL PRINCIPLES
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