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Otolith d18O
Record of Mid-Holocene Sea Surface Temperatures in Peru
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Otolith d18O
Record of Mid-Holocene Sea Surface Temperatures in Peru
Science, v.295(5559), pp.1508-1511, February 22, 2002 C. Fred T. Andrus,1* Douglas E. Crowe, 1 Daniel H. Sandweiss,2 Elizabeth J. Reitz,3 Christopher S. Romanek4 |
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1 Department of Geology, University of Georgia, Athens, GA 30602-2501, USA. 2Department of Anthropology and Institute for Quaternary Research, S. Stevens Hall, University of Maine, Orono, ME 04469, USA 3Department of Anthropology and Georgia Museum of Natural History, Natural History Building, University of Georgia, Athens, GA 30602-1882, USA. 4Savannah River Ecology Laboratory, Drawer E, Aiken, SC 29802, USA. *To whom correspondence should be addressed. E-mail: andrus@gly.uga.edu |
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ABSTRACT: |
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| Download data from this study from WDC Paleo as an Excel file or in separate text files of Archaeological otoliths and cockle shells, Modern otoliths, and Water d18O data, Trophic Levels, and the Data Description. |
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Fig. 2. Photomicrograph of a modern otolith in thin section. The field of view is ~1 cm. d18O values follow ontogeny. |
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Fig. 3. x axes represent time from birth (left) to death (right). y axes are d18O relative to PDB. Horizontal bars at the bottom indicate the macroscopic increment type as seen in transmitted light. White, austral winter; black, austral summer. Precision limits are equal to the size of data points in (B) and (C). (A) Composite mean of 10 modern otoliths. The 1991-1992 and 1997-1998 El Niños are labeled with arrows. Solid circles represent d18Ootolith; vertical lines represent 1sd from mean. Open circles represent d18O model. ( B) Plot of one Ostra otolith; ~6 year record. (C) Plot of one Siches otolith; ~8 year record. (D) Seasonal d18O variation, based on mean values of light and dark bands, from modern otoliths (dashed line), Ostra otoliths (thin line), and Siches otoliths (thick line). A 1-year period beginning and ending in the austral summer is shown. |
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Fig. 4. Plot of mean trophic level, diversity, and equitability of vertebrate marine taxa at sites through time (x axis). At left, the y axis represents the trophic level (triangles). At right, the y axis represents the taxonomic diversity (diamonds) and equitability (squares). Sites, ranging from oldest to most recent, are as follows: Siches, Ostra, Siches-Lower Honda, Siches-Upper Honda, Alto Salaverry, and Pampa de Las Llamas-Moxeke. |
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Research funded in part by grants from the Geological Society of America (C.F.T.A.),
Explorer's Club International (C.F.T.A.), NSF grant ATM-0082213 (D.E.C.),
The Heinz Charitable Trust (D.H.S.), the University of Maine Faculty Research Fund (D.H.S.),
and Department of Energy grant DE-FC09-96SR18546 (C.S.R.).
To read or view the full study, please visit the Science website. It was published in Science Vol. 295, Issue 5559, pp. 1508-1511, February 22, 2002. Note also the Technical Comment and Response in Science Vol. 299, Issue 5604, 10 January 2003. |
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