Controls on delta26Mg variability in three Central European headwater catchments characterized by contrasting bedrock chemistry and contrasting inputs of atmospheric pollutants
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F20%3A00000432" target="_blank" >RIV/00025798:_____/20:00000432 - isvavai.cz</a>
Result on the web
<a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0242915" target="_blank" >https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0242915</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1371/journal.pone.0242915" target="_blank" >10.1371/journal.pone.0242915</a>
Alternative languages
Result language
angličtina
Original language name
Controls on delta26Mg variability in three Central European headwater catchments characterized by contrasting bedrock chemistry and contrasting inputs of atmospheric pollutants
Original language description
Magnesium isotope ratios (26Mg/24Mg) can provide insights into the origin of Mg pools and fluxes in catchments where Mg sources have distinct isotope compositions, and the direction and magnitude of Mg isotope fractionations are known. Variability in Mg isotope compositions was investigated in three small, spruce-forested catchments in the Czech Republic (Central Europe) situated along an industrial pollution gradient. The following combinations of catchment characteristics were selected for the study: low-Mg bedrock + low Mg deposition (Lysina catchment (LYS), underlain by leucogranite); high-Mg bedrock + low Mg deposition (Pluhuv Bor catchment (PLB), underlain by serpentinite), and low-Mg bedrock + high Mg deposition (U Dvou Loucek catchment (UDL), underlain by orthogneiss). UDL, affected by spruce die-back due to acid rain, was the only investigated catchment where dolomite was applied to mitigate forest decline. The delta26Mg values of 10 catchment compartments were determined on pooled subsamples. At LYS, a wide range of delta26Mg values was observed across the compartments, from -3.38 per mille (bedrock) to -2.88 per mille (soil), -1.48percent (open-area precipitation), -1.34 per mille (throughfall), -1.19 per mille (soil water), -0.99 per mille (xylem), -0.95 per mille (needles), -0.82 per mille (bark), -0.76 per mille (fine roots), and -0.76 per mille (runoff). The delta26Mg values at UDL spanned 1.32 per mille and were thus less variable, compared to LYS. Magnesium at PLB was isotopically relatively homogeneous. The delta26Mg systematics was consistent with geogenic control of runoff Mg at PLB. Mainly atmospheric/biological control of runoff Mg was indicated at UDL, and possibly also at LYS. Our sites did not exhibit the combination of low-delta26Mg runoff and high-delta26Mg weathering products (secondary clay minerals) reported from several previously studied sites. Six years after the end of liming at UDL, Mg derived from dolomite was isotopically undetectable in runoff.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
<a href="/en/project/GA18-15498S" target="_blank" >GA18-15498S: Calcium and magnesium isotope mass balances in acidified small catchments with contrasting lithologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PloS One
ISSN
1932-6203
e-ISSN
—
Volume of the periodical
15
Issue of the periodical within the volume
11 : e0242915
Country of publishing house
US - UNITED STATES
Number of pages
19
Pages from-to
1-19
UT code for WoS article
000608488200105
EID of the result in the Scopus database
2-s2.0-85097038282