The relationship of plant leaf δ13Cn-alkanes and salinity in coastal ecosystems applied to palaeobotany: Case study from the Cenomanian of the Bohemian Cretaceous Basin, Czechia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F24%3A10136414" target="_blank" >RIV/00023272:_____/24:10136414 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/24:10492181

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0031018224000415" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0031018224000415</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.palaeo.2024.112052" target="_blank" >10.1016/j.palaeo.2024.112052</a>

Result language

angličtina

Original language name

The relationship of plant leaf δ13Cn-alkanes and salinity in coastal ecosystems applied to palaeobotany: Case study from the Cenomanian of the Bohemian Cretaceous Basin, Czechia

Original language description

Stable carbon isotopes in fossil leaf cuticles (n-alkanes, δ13CnMINUS SIGN alkanes) extracted from the sediment are widely used for palaeoenvironmental reconstructions. This approach relies on a series of assumptions (such as the plantgroup-specific isotopic range, or the atmospheric CO2 being the major factor for the isotopic values) and leaves out the complexity of the carbon isotope fractionation within the plant through time, space, and different environments. The leaf cuticle is a unique archive of local environmental conditions, which has the potential to constrain individual plant habitat. To explore the applicability of the information gained from the δ13CnMINUS SIGN alkanes from fossil plants, a fossil coastal environment was studied. We found a positive correlation between water stress (caused by salinity or drought) and the δ13C values of n-C25, n-C27, n-C29 and n-C31 alkanes when combining all species from all modern localities. However, the absence of a strong correlation within individual species suggests a combination of several factors controlling the carbon isotopic composition. Nevertheless, the general response of δ13C to osmotic stress can be applied to compare the habitat of modern and fossil coastal plants. Thus, by using this relationship, we reconstructed the relative salinity and water stress of individual species of the Cenomanian plants by relating them to modern species-specific ranges of n-C29 isotopic signatures. We showed that the δ13CnMINUS SIGN alkanes of fossil plant cuticles/leaves can be a valuable tool in the reconstruction of plant habitat and help us understand evolution of fossil environments in time and space. Additionally, our data further confirm that the δ13C acquired from plants should be used with caution when reconstructing global atmospheric CO2 because the osmotic stress can shift the δ13C in plants growing in terrestrial environments, particularly in coastal sea-influenced ecosystems.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10506 - Paleontology

Project

<a href="/en/project/GA20-06134S" target="_blank" >GA20-06134S: Palaeoecology of early angiosperms during mid-Cretaceous, case study of material from Iberian Peninsula and central Europe</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Palaeogeography, Palaeoclimatology, Palaeoecology

ISSN

0031-0182

e-ISSN

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Volume of the periodical

638

Issue of the periodical within the volume

112052

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

15

Pages from-to

1-15

UT code for WoS article

001178527300001

EID of the result in the Scopus database

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