Stable Carbon and Nitrogen Isotopic Studies of Devonian Land Plants -- An Indicator of Paleoclimate and Paleoenvironmental Changes

Stable Carbon and Nitrogen Isotopic Studies of Devonian Land Plants -- An Indicator of Paleoclimate and Paleoenvironmental Changes

Bibliographic Details
Main Author: Wan, Zhenzhu
Language:English
Published: University of Cincinnati / OhioLINK 2012
Subjects:
Geochemistry
Mean annual precipitation
Appalachian Basin
Devonian
Land plants
Carbon isotopic composition
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ucin1343068259
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ucin13430682592021-08-03T06:15:48Z Stable Carbon and Nitrogen Isotopic Studies of Devonian Land Plants -- An Indicator of Paleoclimate and Paleoenvironmental Changes Wan, Zhenzhu Geochemistry Mean annual precipitation Appalachian Basin Devonian Land plants Carbon isotopic composition Analysis of >400 specimens of 11 taxa of Devonian land plants (<i>Drepanophycus, Sawdonia, Psilophyton, Leclercqia, Pertica, Rhacophyton, Haskinsia, Pseudosporochnus, Tetraxylopteris, Archaeopteris, and Genselia</i>) revealed stable carbon isotopic (δ<sup>13</sup>C) variation ranging from -30 to -20‰, with a distribution similar to that of modern C3 land plants. Some of this variation is related to secular trends, i.e., specimens of Middle Devonian age are generally 3-4‰ heavier than those of Early or Late Devonian age, but the substantial δ<sup>13</sup>C variation among taxa of a given age (up to ~6‰ for median δ<sup>13</sup>C) is evidence of genetic, metabolic, or environmental influences. Where plant genera from a single depositional system show differences in median δ<sup>13</sup>C values (up to 5‰), genetic or metabolic factors may have played a role. However, both inter- and intrageneric differences in median δ<sup>13</sup>C values between depositional systems are indicative of environmental controls. A review of environmental controls on modern plant C-isotopic variation suggests that water availability (i.e., mean annual precipitation, or MAP) and salinity stress were probably the dominant influences on Devonian plant δ<sup>13</sup>C values. 2012-10-16 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1343068259 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1343068259 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Geochemistry
Mean annual precipitation
Appalachian Basin
Devonian
Land plants
Carbon isotopic composition
spellingShingle Geochemistry
Mean annual precipitation
Appalachian Basin
Devonian
Land plants
Carbon isotopic composition
Wan, Zhenzhu
Stable Carbon and Nitrogen Isotopic Studies of Devonian Land Plants -- An Indicator of Paleoclimate and Paleoenvironmental Changes
author Wan, Zhenzhu
author_facet Wan, Zhenzhu
author_sort Wan, Zhenzhu
title Stable Carbon and Nitrogen Isotopic Studies of Devonian Land Plants -- An Indicator of Paleoclimate and Paleoenvironmental Changes
title_short Stable Carbon and Nitrogen Isotopic Studies of Devonian Land Plants -- An Indicator of Paleoclimate and Paleoenvironmental Changes
title_full Stable Carbon and Nitrogen Isotopic Studies of Devonian Land Plants -- An Indicator of Paleoclimate and Paleoenvironmental Changes
title_fullStr Stable Carbon and Nitrogen Isotopic Studies of Devonian Land Plants -- An Indicator of Paleoclimate and Paleoenvironmental Changes
title_full_unstemmed Stable Carbon and Nitrogen Isotopic Studies of Devonian Land Plants -- An Indicator of Paleoclimate and Paleoenvironmental Changes
title_sort stable carbon and nitrogen isotopic studies of devonian land plants -- an indicator of paleoclimate and paleoenvironmental changes
publisher University of Cincinnati / OhioLINK
publishDate 2012
url http://rave.ohiolink.edu/etdc/view?acc_num=ucin1343068259
work_keys_str_mv AT wanzhenzhu stablecarbonandnitrogenisotopicstudiesofdevonianlandplantsanindicatorofpaleoclimateandpaleoenvironmentalchanges
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