Controls on delta26Mg variability in three Central European headwater catchments characterized by contrasting bedrock chemistry and contrasting inputs of atmospheric pollutants

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Controls on delta26Mg variability in three Central European headwater catchments characterized by contrasting bedrock chemistry and contrasting inputs of atmospheric pollutants

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Controls on delta26Mg variability in three Central European headwater catchments characterized by contrasting bedrock chemistry and contrasting inputs of atmospheric pollutants

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/GA18-15498S" target="_blank" >GA18-15498S: Izotopové hmotové bilance vápníku a hořčíku v acidifikovaných malých povodích na horninovém podloží s kontrastním chemickým složením</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

PloS One

ISSN

1932-6203

e-ISSN

—

Svazek periodika

15

Číslo periodika v rámci svazku

11 : e0242915

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

19

Strana od-do

1-19

Kód UT WoS článku

000608488200105

EID výsledku v databázi Scopus

2-s2.0-85097038282