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| Titel |
Predicting long-term recovery of a strongly acidified stream using MAGIC and climate models (Litavka, Czech Republic) |
| VerfasserIn |
D. W. Hardekopf, J. Horecký, J. Kopáček, E. Stuchlík |
| 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.479-490 |
| Datensatznummer |
250010570
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| Publikation (Nr.) |
 copernicus.org/hess-12-479-2008.pdf |
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| Zusammenfassung |
| Two branches forming the headwaters of a stream in the Czech Republic were
studied. Both streams have similar catchment characteristics and historical
deposition; however one is rain-fed and strongly affected by acid
atmospheric deposition, the other spring-fed and only moderately acidified.
The MAGIC model was used to reconstruct past stream water and soil chemistry
of the rain-fed branch, and predict future recovery up to 2050 under current
proposed emissions levels. A future increase in air temperature calculated
by a regional climate model was then used to derive climate-related
scenarios to test possible factors affecting chemical recovery up to 2100.
Macroinvertebrates were sampled from both branches, and differences in
stream chemistry were reflected in the community structures. According to
modelled forecasts, recovery of the rain-fed branch will be gradual and
limited, and continued high levels of sulphate release from the soils will
continue to dominate stream water chemistry, while scenarios related to a
predicted increase in temperature will have little impact. The likelihood of
colonization of species from the spring-fed branch was evaluated considering
the predicted extent of chemical recovery. The results suggest that the
possibility of colonization of species from the spring-fed branch to the
rain-fed will be limited to only the acid-tolerant stonefly, caddisfly and
dipteran taxa in the modelled period. |
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