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Distribution of Planktonic Foraminifera in the Vicinity of the North Atlantic Current

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dc.contributor.author Cifelli, Richard en
dc.contributor.author Smith, Roberta K. en
dc.date.accessioned 2007-07-31T16:25:10Z
dc.date.available 2007-07-31T16:25:10Z
dc.date.issued 1970
dc.identifier.citation Cifelli, Richard and Smith, Roberta K. 1970. "<a href="http%3A%2F%2Fdx.doi.org%2F10.5479%2Fsi.00810266.4.1">Distribution of Planktonic Foraminifera in the Vicinity of the North Atlantic Current</a>." <em>Smithsonian Contributions to Paleobiology</em>. 1&ndash;52. <a href="https://doi.org/10.5479/si.00810266.4.1">https://doi.org/10.5479/si.00810266.4.1</a> en
dc.identifier.issn 0081-0266
dc.identifier.uri http://hdl.handle.net/10088/1937
dc.identifier.uri http://dx.doi.org/10.5479/si.00810266.4.1
dc.description.abstract Planktonic Foraminifera collected from the vicinity of the North Atlantic Current and the Gulf Stream during late winter-early spring and fall of 1964 are described and their distributions are recorded. Variations in faunal composition seem to be related largely to water regime dynamics and seasonal cycle. Among the fall collections, three distinctive assemblages can be recognized: a western group in the vicinity of the Gulf Stream, containing predominantly Sargasso Sea-Gulf Stream species dominated by <I>Globigerinoides ruber</I>; a northern group, dominated by <I>Globigerina quinqueloba egelida</I>, new subspecies, reflecting the influence of cold, northern waters adjacent to the North Atlantic Current; and an eastern group, dominated by <I>Globigerina incompta</I>, apparently developed within the limits of the North Atlantic Current. The last group seemingly represents an anomaly, as North Atlantic Current surface temperatures were relatively high at the time of collection, and dominance of a warm-water form, such as <I>Globigerinoides ruber</I>, might have been expected. The anomaly suggests that the North Atlantic Current is a partially closed gyre, fed by both slope waters and Gulf Stream. Temperatures are considered to be close to threshold for both cold and warm-water species.<br/>Distributional patterns displayed by the late winter-early spring collections are compatible with the proposed model. Also, these collections, taken over a period of almost three months, reflect marked seasonal changes in faunal composition, particularly in Sargasso Sea-Gulf Stream elements.<br/>Twenty-five species and subspecies are described. One species, <I>Globigerina atlantisae</I>, and one subspecies, <I>Globigerina quinqueloba egelida</I>, are new. en
dc.format.extent 29835154 bytes
dc.format.extent 2044182 bytes
dc.format.mimetype application/pdf
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.relation.ispartof Smithsonian Contributions to Paleobiology en
dc.title Distribution of Planktonic Foraminifera in the Vicinity of the North Atlantic Current en
dc.type Journal Article en
dc.identifier.srbnumber 113436
dc.identifier.eISSN 1943-6688
dc.identifier.doi 10.5479/si.00810266.4.1
rft.jtitle Smithsonian Contributions to Paleobiology
rft.issue 4
rft.spage 1
rft.epage 52
dc.description.SIUnit SISP en
dc.citation.spage 1
dc.citation.epage 52
dc.relation.url http://dx.doi.org/10.5479/si.00810266.4.1

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