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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SEAGRASS COMMUNITIES Many areas of the shallow sea bottom are covered
with a lush growth of aquatic "grasses," collectively called seagrasses.
Seagrasses are flowering plants adapted to live submerged in seawater.
Composition and ...
dent on nutrient concentrations in the water column, seagrasses are rooted
plants that absorb nutrients from the sediment or substrate. They are, therefore,
capable of recycling nutrients into the ecosystem that would otherwise be trapped
matter" •: have leaves or ". epifauna on feet FIGURE 5.31 Diagrammatic
representation of the principal pathways of movement of organic material out of a
seagrass bed. (Modified from J. C. Zieman, 1982, The ecology of the seagrasses
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H A P T E R
SOME ECOLOGICAL PRINCIPLES
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