An Increase in Stream Water DOC Concentrations May Not Necessarily Imply an Increase in DOC Fluxes in Areas Affected by Acid Deposition and Climate Change-An Example from Central European Catchments
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F24%3A00598437" target="_blank" >RIV/86652079:_____/24:00598437 - isvavai.cz</a>
Result on the web
<a href="https://www.mdpi.com/2073-4441/16/16/2220" target="_blank" >https://www.mdpi.com/2073-4441/16/16/2220</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/w16162220" target="_blank" >10.3390/w16162220</a>
Alternative languages
Result language
angličtina
Original language name
An Increase in Stream Water DOC Concentrations May Not Necessarily Imply an Increase in DOC Fluxes in Areas Affected by Acid Deposition and Climate Change-An Example from Central European Catchments
Original language description
Over a period of 30 years (1993-2022), headwater catchments in the Slavkov Forest (Czech Republic) exhibited a robust increase in stream water DOC (dissolved organic carbon) concentrations following a significant reduction in acidic atmospheric deposition. Sulfur deposition decreased from 34 kg ha-1 yr-1 in 1993 to 2.6 kg ha-1 yr-1 in 2022. Three Norway-spruce-dominated research sites-& Ccaronern & yacute, Potok (CEP), a 15.2 ha peatbog catchment, Lysina (LYS), a 27.3 ha granitic catchment, and Pluh & uringv Bor (PLB), a 21.6 ha serpentinite catchment, were investigated. The three-year average DOC concentration increased from 48.2 mg L-1 (1993-1995) to 68.3 mg L-1 (2020-2022) at CEP (0.69 mg L-1 yr-1). LYS showed an increase from 16.9 mg L-1 to 25.4 mg L-1 (0.30 mg L-1 yr-1 annually). The largest increase was recorded at PLB, with an increase from 15.7 mg L-1 to 36.7 mg L-1 (0.89 mg L-1 yr-1). A decline in ionic strength was identified as the main driver of the DOC increase. The annual runoff declined significantly at CEP and LYS from 465 mm to 331 mm as a result of rising air temperatures and reduced precipitation between 2014 and 2022. PLB (average of 266 mm) did not show a statistically significant decline. Recently, PLB experienced significant deforestation that likely lowered transpiration and thus increased catchment runoff. As a result, DOC fluxes did not change significantly at CEP (average 210 kg ha-1 yr-1) and LYS (90 kg ha1 yr-1). However, PLB's DOC flux more than doubled, increasing from 44 to 106 kg ha-1 yr-1. Drivers connected with global change, such as increasing temperatures, or potential chemical drivers, such as reductions in Al concentrations and pH changes, were not able to explain the observed changes in DOC concentra tions and fluxes.
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
10503 - Water resources
Result continuities
Project
<a href="/en/project/GC21-22810J" target="_blank" >GC21-22810J: Linking the composition of dissolved organic matter and nutrient cycling in streams of temperate forested catchments</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Water
ISSN
2073-4441
e-ISSN
2073-4441
Volume of the periodical
16
Issue of the periodical within the volume
16
Country of publishing house
CH - SWITZERLAND
Number of pages
16
Pages from-to
2220
UT code for WoS article
001309018700001
EID of the result in the Scopus database
2-s2.0-85202451750