Observations on intertidal organism associations of St. Catherines Island, Georgia. 2, Morphology and distribution of Littorina irrorata (Say). American Museum novitates ; no. 2873

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dc.contributor.authorFierstien, John F.en_US
dc.contributor.authorRollins, Harold B., 1939-en_US
dc.date.accessioned2005-10-06T18:09:51Z
dc.date.available2005-10-06T18:09:51Z
dc.date.issued1987en_US
dc.description31 p. : ill., maps ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 29-31).en_US
dc.description.abstract"The marsh periwinkle Littorina irrorata (Say) occurs in a variety of Spartina marsh settings on St. Catherines Island, Georgia. Cohorts of L. irrorata were collected at four marsh localities and control grids were monitored over a three-week period. In addition, a fossil population was collected from a relict marsh mud. Each sample was subjected to detailed morphometric analysis using univariate, bivariate, and multivariate techniques. Adult size of L. irrorata is inversely related to population density and density, in turn, is directly proportional to the abundance of Spartina grass. Progenesis appears to be the adaptive strategy adopted for size decrease. Aperture shape exhibited the least variation and was relatively independent of translation rate, whorl expansion rate, aperture angle, and total width. larger apertural area was correlated with low marsh environemnts ('wetter' conditions). Total width of L. irrorata proved to be a better indicator of population structure than total height and should be used in the construction of survivorship curves for this species. The fossil population sample apparently refelcts substantially different growth dynamics, achieving adult size at fewer than six whorls. L. irrorata is a potentially useful tool for paleoenvironmental reconstructions. the species appears to exhibit limited lateral motility and has a strong distributional dependence upon Spartina grass. Monitoring cohorts of L. irrorata demonstrated a direct relationship between population density and short-term stability of population size"--P. [1].en_US
dc.format.extent4846227 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/5215
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, N.Y. : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates ; no. 2873en_US
dc.subject.lccQL1 .A436 no.2873, 1987en_US
dc.subject.lcshLittorina irrorata.en_US
dc.subject.lcshMollusks -- Georgia -- Saint Catherines Island.en_US
dc.subject.lcshSpartina -- Georgia -- Saint Catherines Island.en_US
dc.subject.lcshIntertidal animals -- Georgia -- Saint Catherines Island.en_US
dc.subject.lcshSeashore ecology -- Georgia -- Saint Catherines Island.en_US
dc.subject.lcshMollusks, Fossil -- Georgia -- Saint Catherines Island.en_US
dc.subject.lcshPaleoecology -- Georgia -- Saint Catherines Island.en_US
dc.titleObservations on intertidal organism associations of St. Catherines Island, Georgia. 2, Morphology and distribution of Littorina irrorata (Say). American Museum novitates ; no. 2873en_US
dc.title.alternativeMorphology and distribution of Littorina irrorata (Say)en_US
dc.title.alternativeIntertidal organism associationsen_US
dc.typetexten_US

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