| Autor: |
Dočkalová, Kateřina, Stuchlík, Evžen, Hamerlík, Ladislav, Bitušík, Peter, Turek, Jan, Svitok, Marek, Novikmec, Milan, Lackner, Reinhard, Dvorak, Martin, Kopáček, Jiří, Tátosová, Jolana, Camarero, Lluís, Füreder, Leopold, Vondrák, Daniel |
| Zdroj: |
Environmental Entomology; August 2024, Vol. 53 Issue: 4 p604-618, 15p |
| Abstrakt: |
Chironomids of the genus Diamesa(Meigen, 1835, Diptera: Chironomidae) inhabit cold, oxygen-rich running waters. We have investigated the presence of Diamesaand other freshwater macroinvertebrates at 22 stream sampling sites in 3 European high mountain regions (the Central Pyrenees, the Ötztal Alps, and the Tatra Mountains) to establish suitable temperature conditions for Diamesadominance. It has been generally accepted that their high abundance was linked to the presence of glaciers; however, we have shown that in the Tatra Mountains, where there are no glaciers, the conditions for the dominance of Diamesaspecies are created due to permanent snowfields, the geographical orientation of the valley and shading by the surrounding high peaks. The historical connection of Diamesato glaciers was investigated from the paleolimnological records of subfossil chironomid assemblages from the Bohemian Forest, where glaciers disappeared before or during the Late Glacial period.As expected, water temperature seems to be the main driver of Diamesadistribution, and we determined that the relative abundance of Diamesaspecies was significantly higher at the sites with a mean July water temperature below 6.5 °C. The Diamesa-dominated stream communities seems to be endangered due to ongoing climate warming and this assumption is supported by our paleolimnological results from the Bohemian Forest lakes, where Diamesahas disappeared due to warming of lake inflows at the beginning of the Holocene. These findings strengthen the former suggestions that some Diamesaspecies could be used as an indicator for tracking recent environmental changes in vulnerable ecosystems of cold mountain streams. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
