Calcium and strontium isotope dynamics in three polluted forest ecosystems of the Czech Republic, Central Europe

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F20%3A00000166" target="_blank" >RIV/00025798:_____/20:00000166 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/86652079:_____/20:00523898 RIV/00020702:_____/20:N0000013

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0009254120300115" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0009254120300115</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chemgeo.2020.119472" target="_blank" >10.1016/j.chemgeo.2020.119472</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Calcium and strontium isotope dynamics in three polluted forest ecosystems of the Czech Republic, Central Europe

Popis výsledku v původním jazyce

Calcium and strontium isotope ratios were used to identify Ca sources for bulk soil, soil solutions and runoff in the stressed forest ecosystems of Central Europe. All three study sites are underlain by Ca-poor crystalline bedrock (orthogneiss, leucogranite and serpentinite, respectively), but differ in historical rates of acid deposition. UDL, the spruce die-back affected site at the Czech–Polish border underlain by orthogneiss, received six times more acidifying compounds from the atmosphere than LYS and PLB, two paired catchments near the Czech–German border. The paired catchments near the Czech–German border, whose forests were only mildly damaged by industrial pollution, differ in their acid buffering capacity (extremely low for LYS leucogranite, extremely high for PLB serpentinite). At the spruce die-back affected catchment UDL, 19 years of monthly hydrochemical monitoring revealed six times higher atmospheric deposition and runoff fluxes of Ca, compared to the paired catchments LYS and PLB. Across the three sites, the mean &#61540;44Ca values increased in the order: spruce bark (&#8722;0.84per mille) < spruce xylem (&#8722;0.31per mille) < spruce fine roots (0.0per mille) < bedrock (0.08per mille) < soil (0.11per mille) < spruce needles (0.31per mille) < open-area precipitation (0.68per mille) < spruce throughfall (0.71per mille) < runoff (0.74per mille) < soil water (1.11per mille). At all three sites, Ca from atmospheric deposition was isotopically similar to Ca in runoff, indicating export of recent atmospheric Ca. All three catchments had isotopically lighter Ca in silicate bedrock and exported isotopically heavier Ca via runoff. Trees mostly represented the isotopically lightest Ca pool, whereas soil water collected by lysimeters contained isotopically heavy Ca. The 87Sr/86Sr isotope ratios were nearly uniform at the serpentinite site PLB (0.710). The 87Sr/86Sr ratios across the two felsic sites (UDL and LYS) increased in the order: open-area precipitation (0.710) < spruce canopy throughfall (0.715) < spruce xylem (0.723) < spruce needles (0.725) < soil water (0.734) < runoff (0.740) < soil (0.862) < bedrock (0.881). Collectively, the &#61540;44Ca and 87Sr/86Sr isotope systematics indicated that organic Ca cycling, along with atmospheric input of isotopically heavy Ca, largely contributed to the high-&#61540;44Ca values of runoff. The studied silicate bedrock had significantly lower &#61540;44Ca values than the reported world-wide average. While bulk soil Ca was likely affected by bedrock Ca even after the period of acid rain, the &#61540;44Ca difference between soil and soil water indicated a major role of recycled organic Ca in supplying nutrition to the trees. Future Ca–Sr isotope research in headwater catchments should include isotope analysis of sequentially leached Ca fractions from weathered minerals in soil to better assess the geogenic Ca inputs to runoff. In catchments currently recovering from pollution, Ca–Sr isotope fingerprinting of dust emitted from coal-fired power plants will be needed. Isotope analysis of local coal can indicate to what extent Ca–Sr isotope composition of past deposition contributes to the isotope signatures of present-day runoff.

Název v anglickém jazyce

Calcium and strontium isotope dynamics in three polluted forest ecosystems of the Czech Republic, Central Europe

Popis výsledku anglicky

Calcium and strontium isotope ratios were used to identify Ca sources for bulk soil, soil solutions and runoff in the stressed forest ecosystems of Central Europe. All three study sites are underlain by Ca-poor crystalline bedrock (orthogneiss, leucogranite and serpentinite, respectively), but differ in historical rates of acid deposition. UDL, the spruce die-back affected site at the Czech–Polish border underlain by orthogneiss, received six times more acidifying compounds from the atmosphere than LYS and PLB, two paired catchments near the Czech–German border. The paired catchments near the Czech–German border, whose forests were only mildly damaged by industrial pollution, differ in their acid buffering capacity (extremely low for LYS leucogranite, extremely high for PLB serpentinite). At the spruce die-back affected catchment UDL, 19 years of monthly hydrochemical monitoring revealed six times higher atmospheric deposition and runoff fluxes of Ca, compared to the paired catchments LYS and PLB. Across the three sites, the mean &#61540;44Ca values increased in the order: spruce bark (&#8722;0.84per mille) < spruce xylem (&#8722;0.31per mille) < spruce fine roots (0.0per mille) < bedrock (0.08per mille) < soil (0.11per mille) < spruce needles (0.31per mille) < open-area precipitation (0.68per mille) < spruce throughfall (0.71per mille) < runoff (0.74per mille) < soil water (1.11per mille). At all three sites, Ca from atmospheric deposition was isotopically similar to Ca in runoff, indicating export of recent atmospheric Ca. All three catchments had isotopically lighter Ca in silicate bedrock and exported isotopically heavier Ca via runoff. Trees mostly represented the isotopically lightest Ca pool, whereas soil water collected by lysimeters contained isotopically heavy Ca. The 87Sr/86Sr isotope ratios were nearly uniform at the serpentinite site PLB (0.710). The 87Sr/86Sr ratios across the two felsic sites (UDL and LYS) increased in the order: open-area precipitation (0.710) < spruce canopy throughfall (0.715) < spruce xylem (0.723) < spruce needles (0.725) < soil water (0.734) < runoff (0.740) < soil (0.862) < bedrock (0.881). Collectively, the &#61540;44Ca and 87Sr/86Sr isotope systematics indicated that organic Ca cycling, along with atmospheric input of isotopically heavy Ca, largely contributed to the high-&#61540;44Ca values of runoff. The studied silicate bedrock had significantly lower &#61540;44Ca values than the reported world-wide average. While bulk soil Ca was likely affected by bedrock Ca even after the period of acid rain, the &#61540;44Ca difference between soil and soil water indicated a major role of recycled organic Ca in supplying nutrition to the trees. Future Ca–Sr isotope research in headwater catchments should include isotope analysis of sequentially leached Ca fractions from weathered minerals in soil to better assess the geogenic Ca inputs to runoff. In catchments currently recovering from pollution, Ca–Sr isotope fingerprinting of dust emitted from coal-fired power plants will be needed. Isotope analysis of local coal can indicate to what extent Ca–Sr isotope composition of past deposition contributes to the isotope signatures of present-day runoff.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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

Chemical Geology

ISSN

0009-2541

e-ISSN

—

Svazek periodika

536

Číslo periodika v rámci svazku

March : 119472

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

nestránkováno

Kód UT WoS článku

000512909600007

EID výsledku v databázi Scopus

2-s2.0-85078221104