georefid:2009-007245SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1073/pnas.04099071022005-01-01publicationgeorefid:2009-007245doi:10.1073/pnas.0409907102Finkel, Zoe V.Rutgers, State University of New Jersey, Institute of Marine and Coastal Sciences, New Brunswick, NJ, United StatesauthorKatz, Miriam E.authorWright, James D.authorSchofield, Oscar M. E.authorFalkowski, Paul G.authorNational Academy of Sciences, Washington, DC, United StatespublisherdocumentHardcopyProceedings of the National Academy of Sciences of the United States of America102 (25)8927-8932Numerous taxonomic groups exhibit an evolutionary trajectory in cell or body size. The size structure of marine phytoplankton communities strongly affects food web structure and organic carbon export into the ocean interior, yet macroevolutionary patterns in the size structure of phytoplankton communities have not been previously investigated. We constructed a database of the size of the silica frustule of the dominant fossilized marine planktonic diatom species over the Cenozoic. We found that the minimum and maximum sizes of the diatom frustule have expanded in concert with increasing species diversity. In contrast, the mean area of the diatom frustule is highly correlated with oceanic temperature gradients inferred from the delta (super 18) O of foraminiferal calcite, consistent with the hypothesis that climatically induced changes in oceanic mixing have altered nutrient availability in the euphotic zone and driven macroevolutionary shifts in the size of marine pelagic diatoms through the Cenozoic.completedStratigraphyPaleobotanyalgaebiologic evolutionC-13/C-12carbonCenozoicclimateclimate changeDeep Sea Drilling Projectdepositional environmentdiatomsfrustulesglobalisotope ratiosisotopesmicrofossilsNeptune data baseOcean Drilling Programpaleoecologypaleoenvironmentpatternsphytoplanktonplanktonplanktonic taxaPlantaeregression analysissizestable isotopesstatistical analysisEnglishgeoscientificInformation