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Authors Tanner, BR; Uhle, ME; Kelley, JT; Mora, CI
Author Full Name Tanner, Benjamin R.; Uhle, Maria E.; Kelley, Joseph T.; Mora, Claudia I.
Title C3/C4 variations in salt-marsh sediments: An application of compound specific isotopic analysis of lipid biomarkers to late Holocene paleoenvironmental research
Source ORGANIC GEOCHEMISTRY
Language English
Document Type Article
Keywords Plus SAN-FRANCISCO ESTUARY; SEA-LEVEL CHANGE; CARBON-ISOTOPE; ORGANIC-MATTER; SALINITY; MAINE; PLANTS; USA; CLIMATE; ORIGIN
Abstract In salt-marshes, bulk carbon isotope values reflect organic matter contributions not only from salt-marsh plants, but also from algal and bacterial inputs, as well as allochthonous terrestrial organic matter. In the present study, compound specific isotope analysis was applied to a core and modern plant samples collected from a Machiasport, Maine salt-marsh. We sampled 10 plant species common to the marsh including Spartina alterniflora, Spartina patens, Juncus gerardi, Solidago sempervirens, Salicornia europa, Potentilla anserina, Atriplex patula, Plantago maritima, Suaeda maritima and Limonium nashii. Isolation of two n-alkanes (C-27 and C-29) present in marsh plant samples allowed for the reconstruction of past plant communities present in the cored deposits. For the C-27 and C-29 homologues there is a 3-10 parts per thousand separation in carbon isotopic composition between C3 and C4 species. Carbon isotopic values down core show a transition from a C4 dominated plant community to a C3 dominated community, attributable to the migration of lower marsh zones onto brackish/freshwater marsh zones during a late Holocene relative sea-level rise. The two homologues used have the potential to provide paleoenvironmental information in future core work, where the sea-level variable will be controlled. (c) 2006 Elsevier Ltd. All rights reserved.
Author Address Western Carolina Univ, Dept Geosci & NRM, Cullowhee, NC 28723 USA; Natl Acad, Polar Res Board, Washington, DC 20001 USA; Univ Maine, Dept Earth Sci, Orono, ME 04469 USA; Univ Maine, Climate Change Inst, Orono, ME 04469 USA; Univ Tennessee, Dept Earth & Planetary Sci, Knoxville, TN 37996 USA
Reprint Address Tanner, BR (reprint author), Western Carolina Univ, Dept Geosci & NRM, 349 Stillwell Bldg, Cullowhee, NC 28723 USA.
E-mail Address btanner@wcu.edu
ResearcherID Number Mora, Claudia/B-5511-2017
ORCID Number Mora, Claudia/0000-0003-2042-0208
Times Cited 15
Total Times Cited Count (WoS, BCI, and CSCD) 15
Publisher PERGAMON-ELSEVIER SCIENCE LTD
Publisher City OXFORD
Publisher Address THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
ISSN 0146-6380
29-Character Source Abbreviation ORG GEOCHEM
ISO Source Abbreviation Org. Geochem.
Year Published 2007
Volume 38
Issue 3
Beginning Page 474
Ending Page 484
Digital Object Identifier (DOI) 10.1016/j.orggeochem.2006.06.009
Page Count 11
Web of Science Category Geochemistry & Geophysics
Subject Category Geochemistry & Geophysics
Document Delivery Number 148AS
Unique Article Identifier WOS:000245047500010
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