| Autor: |
Kudernatsch, Thomas, Huber, Doris, Sutcliffe, Laura, Walentowski, Helge, Kirchner, Manfred, Fegg, Wolfgang, Franz, Helmut |
| Jazyk: |
němčina |
| Rok vydání: |
2016 |
| Předmět: |
|
| DOI: |
10.14471/2016.36.003 |
| Popis: |
Anthropogenic impacts such as global warming, land-use change and nitrogen deposition are affecting plant communities worldwide, and particularly alpine communities have been undergoing significant changes in recent years. We therefore analysed changes in the alpine calcareous grassland vegetation (Carex sempervirens and Carex firma communities) in the Berchtesgaden National Park over the last 30 years. We used data from permanent plots to produce a “floristic time series” from the 1980s to the present. We analysed the changes in the composition and species richness and tried to link these to autogenic or allogenic processes, with special focus on anthropogenic nitrogen deposition as a potential major cause. We found clear floristic changes over the study period, with an increase in average species richness of more than 10 species per plot in both communities. The Carex firma communities also showed a significant decrease in the average indicator values for continentality, suggesting that the floristic changes might be related to global warming and the resulting climatic effects. Global warming may have also accelerated the natural successional processes affecting the vegetation, but the time frame of 30 years is too short to consider this autogenic succession as one of the main factors. In contrast, nitrogen deposition or changes in land use appear to have played a smaller role in the vegetation changes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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