Spatially resolved soil solution chemistry in a central European atmospherically polluted high-elevation catchment

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F19%3A00000058" target="_blank" >RIV/00025798:_____/19:00000058 - isvavai.cz</a>

Result on the web

<a href="https://www.soil-journal.net/5/205/2019/" target="_blank" >https://www.soil-journal.net/5/205/2019/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/soil-5-205-2019" target="_blank" >10.5194/soil-5-205-2019</a>

Result language

angličtina

Original language name

Spatially resolved soil solution chemistry in a central European atmospherically polluted high-elevation catchment

Original language description

We collected soil solutions by suction lysimeters in a central European temperate forest with a history of acidification-related spruce die-back in order to interpret spatial patterns of soil nutrient partitioning, compare them with stream water chemistry and evaluate these parameters relative to concurrent loads of anions and cations in precipitation. Five lysimeter nests were installed in the 33 ha U dvou loucek (UDL) mountain catchment at different topographic positions (hilltops, slopes and valley). Following equilibration, monthly soil solution samples were interrogated over a 2-year period with regard to their SO2−4, NO−3, NH+4, Na+, K+, Ca2+, Mg2+ and total dissolved Al concentrations, organic carbon (DOC) and pH. Soil pits were excavated in the vicinity of each lysimeter nest to also constrain soil chemistry. For an estimation of phosphorus (P) availability, ammonium oxalate extraction of soil samples was performed. Cation exchange capacity (CEC ≤58 meq kg−1) and base saturation (BS ≤13 percent) were found to be significantly lower at UDL than in other monitored central European small catchments areas. Spatial trends and seasonality in soil solution chemistry support belowground inputs from mineral-stabilized legacy pollutants. Overall, the soil solution data suggest that the ecosystem was still chemically out of balance relative to the concurrent loads of anions and cations in precipitation, documenting incomplete recovery from acidification. Nearly 30 years after peak acidification, UDL exhibited similar soil solution concentrations of SO24, Ca2+ and Mg2+ as median values at the Pan-European International Co-operative Program (ICP) Forest sites with similar bedrock lithology and vegetation cover, yet NO−3 concentrations were an order of magnitude higher. When concentrations of SO2−4, NO−3 and base cations in runoff are compared to soil pore waters, higher concentration in runoff points to lateral surficial leaching of pollutants and nutrients in excess than from topsoil to subsoil. With P availability being below the lowest range observed in soil plots from the Czech Republic, the managed forest ecosystem in UDL probably reflects growing inputs of C from regenerating vegetation in the N-saturated soil, which leads to P depletion in the soil. In addition, the observed spatial variability provides evidence pointing to substrate variability, C and P bioavailability, and landscape as major controls over base metal leaching toward the subsoil level in N-saturated catchments.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

40104 - Soil science

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)

Publication year

2019

Confidentiality

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

Name of the periodical

SOIL (EGU)

ISSN

2199-3971

e-ISSN

—

Volume of the periodical

5

Issue of the periodical within the volume

2

Country of publishing house

DE - GERMANY

Number of pages

16

Pages from-to

205-221

UT code for WoS article

000477979000001

EID of the result in the Scopus database

—