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    <gcmd:viewer>https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/14c8935f-8a46-4111-8f2e-bec8bbae5d13</gcmd:viewer>
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    <skos:broader rdf:resource="ce4b2c6e-3d69-4cf1-8416-c36e5f9b1b2c"/>
    <skos:prefLabel xml:lang="en">BIOTURBATION</skos:prefLabel>
    <gcmd:reference gcmd:text="Libes, S.M. 1992. An Introduction to Marine Biogeochemistry. John Wiley and Sons, Inc. p. 690." xml:lang="en"/>
    <skos:definition xml:lang="en">The physical mixing of sediments caused by the burrowing and feedingactivities of benthic organisms.</skos:definition>
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