Calcium isotope constraints on the uptake and sources of Ca2+ in a base-poor forest: A new concept of combining stable (d44/42Ca) and radiogenic (eCa) signals

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F11%3A00000370" target="_blank" >RIV/00025798:_____/11:00000370 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.gca.2011.09.021" target="_blank" >http://dx.doi.org/10.1016/j.gca.2011.09.021</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.gca.2011.09.021" target="_blank" >10.1016/j.gca.2011.09.021</a>

Result language

angličtina

Original language name

Calcium isotope constraints on the uptake and sources of Ca2+ in a base-poor forest: A new concept of combining stable (d44/42Ca) and radiogenic (eCa) signals

Original language description

This study shows that in a base-poor forest of the northeastern USA the ?exchangeable Ca pool? of deeper mineral soils is significantly enriched in radiogenic 40Ca, due to the dissolution of K-rich silicate minerals. Using a simple isotope mass balance model our results indicate that the weathering of biotite may supply a sizeable fraction, up to 25%, of Ca into the ?exchangeable pool? of deeper mineral soils. We also found no evidence of radiogenic 40Ca in the samples of forest floor and the uppermostorganic-rich soils, which in turn suggest that over the long-term development of the forest, the vegetation growth must relied primarily on the non-radiogenic Ca sources, such as (i) atmospheric deposition, (ii) organically-complexed Ca, and (iii) chemical weathering and/or fungal mediated dissolution of apatite. Hence, our Ca isotope data indicate that the base-poor forest is able to bypass the ?exchangeable pool? of deeper mineral soils, and still manages to meet its nutritional Ca req

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DD - Geochemistry

OECD FORD branch

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Project

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Continuities

R - Projekt Ramcoveho programu EK

Publication year

2011

Confidentiality

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

Name of the periodical

Geochimica et Cosmochimica Acta

ISSN

0016-7037

e-ISSN

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Volume of the periodical

75

Issue of the periodical within the volume

22

Country of publishing house

GB - UNITED KINGDOM

Number of pages

16

Pages from-to

7031-7046

UT code for WoS article

000296579600019

EID of the result in the Scopus database

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