Distribution and ecology of recent benthonic foraminifera of the Dumont D'Urville Sea, Antarctica

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dc.contributor.advisorAnderson, John B.en_US
dc.contributor.committeeMemberCasey, Richard E.en_US
dc.contributor.committeeMemberSchwarzer, Rudy R.en_US
dc.creatorMilam, Robert Wilsonen_US
dc.date.accessioned2018-12-18T21:16:17Zen_US
dc.date.available2018-12-18T21:16:17Zen_US
dc.date.issued1981en_US
dc.descriptionNo page 69en_US
dc.description.abstractSix distinct benthonic foraminiferal assemblages are recognized in the Dumont D'Urville Sea of Antarctica on the basis of the common occurrence and predominance of taxons. The distribution of calcareous and arenaceous faunal facies on the continental shelf coincides remarkably with the relative distribution of reworked glacial sediments and organic-rich biogenic muds. Surface productivity, seafloor topography, and bottom current velocities are thought to control the distribution of these biogenic muds, which are restricted to shelf depressions, and the surface sediments themselves are thought to control the relative distribution of arenaceous and calcareous populations on the shelf. Depth is a subsidiary factor in controlling faunal distributions on the continental shelf. A mixed calcareous and arenaceous fauna defines the contact of the lysocline with the continental slope, below which lies the oceanic CCD at 19m and a slope arenaceous fauna. Shelf assemblages are generally of low diversity, but high diversity populations underlie upwelling nutrient-rich plumes of modified Upper Circumpolar Deep Water, which have been injected along an isopycnal between underlying dense shelf water and overlying surface water. Benthonic foraminifera are therefore useful as indicators of hydrographic conditions, and models relating the distribution of high diversity standing crops of benthonic foraminifera to such upwelling plumes are discussed.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent145 ppen_US
dc.identifier.callnoThesis Geol. 1981 Milamen_US
dc.identifier.citationMilam, Robert Wilson. "Distribution and ecology of recent benthonic foraminifera of the Dumont D'Urville Sea, Antarctica." (1981) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104018">https://hdl.handle.net/1911/104018</a>.en_US
dc.identifier.digitalRICE1644en_US
dc.identifier.urihttps://hdl.handle.net/1911/104018en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleDistribution and ecology of recent benthonic foraminifera of the Dumont D'Urville Sea, Antarcticaen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentEarth Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Artsen_US
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