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| Titel |
What affects the nitrogen retention in Tatra Mountains lakes' catchments in Poland? |
| VerfasserIn |
D. Rzychoń, A. Worsztynowicz |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 12, no. 2 ; Nr. 12, no. 2 (2008-03-05), S.415-424 |
| Datensatznummer |
250010565
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| Publikation (Nr.) |
 copernicus.org/hess-12-415-2008.pdf |
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| Zusammenfassung |
| The study of acidification and recovery of two lakes situated in the Polish
Tatra Mountains, exposed to similar deposition of acidic substances but
differing in altitude, catchment morphology, hydrology, and biodiversity is
presented. Measurements were performed in 1992–1996 and 2001–2005.
Simultaneously, research on the atmospheric deposition was carried out. The
following physical and chemical parameters in lake water and precipitation
were measured: pH, conductivity (K25), Ca2+, Mg2+, Na+,
K+, NH4+, SO42−, NO3−, Cl− and
alkalinity. Distinct changes in the chemical composition of precipitation
were observed over 14 years (1992–2005). During this time the sulphate
concentration decreased significantly, and the concentration of hydrogen
ions in precipitation decreased at an average rate of 2.23 meq/m3/yr.
There was no significant change in nitrate, ammonium or total nitrogen
deposition. The chemical composition of water of both lakes changed
significantly and showed signs of chemical recovery with decreases in
sulphate concentration and increases in acid neutralising capacity. The
concentration of base cations declined. Despite the lack of clear trends in
nitrogen deposition, a statistically significant drop in concentration was
observed in the two lakes. A significant increase of about 15% in the
retention of nitrogen compounds in both catchments occurred. An improvement
in nitrogen saturation status in both catchments was observed. This probably
resulted mainly from decreasing acidification and global warming which
prolongs the vegetative period, changes plant species composition and
increases the microbiological activity of soil. |
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