Show simple item record

dc.contributor.advisorRowe, Gilbert T.
dc.creatorChen, Min
dc.date.accessioned2004-09-30T01:41:33Z
dc.date.available2004-09-30T01:41:33Z
dc.date.created2003-12
dc.date.issued2004-09-30
dc.identifier.urihttps://hdl.handle.net/1969.1/73
dc.description.abstractDensity, species diversity, species richness, and evenness of bivalve mollusks were measured in the deep (0.2km to 3.7km) northern Gulf of Mexico to describe the community structure of benthic bivalve mollusks. Density decreased gradually from shallow continental slope depths, with remarkably high values in the Mississippi canyon, to the deepest sites. Diversity of bivalve mollusks increased from shallow continental slope depths, with low values in the Mississippi canyon, to a maximum at intermediate depths (1-2km), followed by a decrease down to the deepest locations (3.7km). Nine distinct groups were formed on the basis of the similarity in species composition. The pattern varied more abruptly on the slope compared to the deeper depths, possibly due to steeper gradients in physical variables. ANOVA indicated that the density of bivalve mollusks was not significantly different at different depths, was not significantly different on different transects, was not significantly different between basin and non-basin, but was significantly different in canyon and non-canyon locations. Similar distinctions were observed in diversity, except that basins were lower than non-basins. The patterns observed reflect the intense elevated input of terrigenous sediments accompanied by high surface-water plankton production from the Mississippi River to the north central gulf.en
dc.format.extent518588 bytesen
dc.format.extent106673 bytesen
dc.format.mediumelectronicen
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.language.isoen_US
dc.publisherTexas A&M University
dc.subjectcommunity structureen
dc.subjectdeep-seaen
dc.subjectbivalveen
dc.subjectmollusksen
dc.subjectGulf of Mexicoen
dc.titleCommunity structure of deep-sea bivalve mollusks from the northern Gulf of Mexicoen
dc.typeThesisen
thesis.degree.departmentOceanographyen
thesis.degree.disciplineOceanographyen
thesis.degree.grantorTexas A&M Universityen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelMastersen
dc.contributor.committeeMemberWicksten, Mary K.
dc.contributor.committeeMemberPinckney, Jay
dc.contributor.committeeMemberHubbard, Fain
dc.type.genreElectronic Thesisen
dc.type.materialtexten
dc.format.digitalOriginborn digitalen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record