Fluxes of ecologically important solutes in the Čertovo catchment–lake system from 1998–2017

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F18%3A00498088" target="_blank" >RIV/60077344:_____/18:00498088 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Fluxes of ecologically important solutes in the Čertovo catchment–lake system from 1998–2017

Original language description

Fluxes of major ions and nutrients were measured in the catchment–lake system of atmospherically acidified Čertovo Lake between 1998 and 2017 hydrological years. Water balance was calculated from precipitation and throughfall amounts, and measured outflow from the lake. The average water outflow from the system was 1216 mm/yr, and the water residence time in the lake averaged 649 days. The Čertovo catchment remained an average net source of protons (440 eq/ha/yr) despite significant reductions in sulphur and nitrogen deposition since the late 1980s. Nitrogen saturation of the catchment soils caused low retention of the deposited inorganic N (23% on average) and the terrestrial ammonium removal and nitrate production via nitrification (500 and 250 eq/ha/yr, respectively) were the major terrestrial sources of protons. Net terrestrial sulphate production (the second most important proton source) decreased from 490 to 310 eq/ha/yr between 1998–2002 and 2013–2017, and this decrease was accompanied by decreasing production of ionic Al (Ali) forms from 470 to 260 eq/ha/yr. The increasing terrestrial production of organic acid anions (A) compensated for the decreasing sulphate leaching and maintained (and stabilized) low pH (4.1–4.5) in lake tributaries during the study period. Compared to precipitation, the catchment was a net source of all ions and nutrients (except for ammonium). The in-lake biogeochemical processes reduced the incoming protons by 40% (i.e., neutralized on average 2230 eq/ha/yr protons on a lake-area basis). The nitrate and sulphate reductions and photochemical and microbial oxidation of A were the most important proton neutralizing processes (1840, 380, and 1400 eq/ha/yr, respectively), while hydrolysis of Ali was the dominant proton generating process (790 eq/ha/yr). The lake was a net sink for all nutrients, removing on average 13–38% of total (terrestrial and atmospheric) inputs of dissolved organic carbon, phosphorus, nitrogen, and silicon.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

<a href="/en/project/GA17-15229S" target="_blank" >GA17-15229S: Phosphorus dynamics in unmanaged terrestrial ecosystems: Links with nitrogen and carbon cycling.</a><br>

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

Silva Gabreta

ISSN

1211-7420

e-ISSN

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Volume of the periodical

24

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

10

Pages from-to

85-114

UT code for WoS article

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EID of the result in the Scopus database

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