Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Consecutive earthquakes temporarily restructured the zooplankton community in an Alpine Lake
Brancelj, A.; Zibrat, U.; Mezek, T.; Brancelj, I.R.; Dumont, H.J. (2012). Consecutive earthquakes temporarily restructured the zooplankton community in an Alpine Lake. Ann. Limnol. 48(1): 113-123. http://dx.doi.org/10.1051/limn/2012001
In: Annales de Limnologie = International Journal of Limnology. Masson et Cie/EDP Sciences: Paris. ISSN 0003-4088; e-ISSN 2100-000X
|   |
| Author keywords |
Competition / earthquake / high-mountain lake / invasion / zooplankton community |
| Auteurs | | Top |
- Brancelj, A.
- Zibrat, U.
- Mezek, T.
|
- Brancelj, I.R.
- Dumont, H.J.
|
|
| Abstract |
Two consecutive earthquakes temporary changed a zooplankton community in a high-mountain Lake Krn (altitude 1383 m a.s.l.). It was dominated by the eurytherm copepod, Cyclops vicinus, until 1998, when the first earthquake hit the lake (EMS=5.6). After the earthquake, the population of C. vicinus collapsed and the thermophilic cladoceran, Ceriodaphnia quadrangula, took over. After the second earthquake in 2004 (EMS=4.0), C. vicinus became untraceable. In 2008, few copepods reappeared and by 2010 they became the sole dominant again. Only Secchi-disc depth showed a statistically significant increase over time, while Ntot, Ptot and temperature showed an increasing trend, yet the relationship was insignificant. To compare multi-parameter properties of the water column, the studied period was divided into Period 1 (before the first earthquake), Period 2 (between earthquakes) and Period 3 (after the second earthquake). A Hotteling T2 test confirmed a statistically significant difference between Periods 1 and 2 & 3 (P<0.01), but not between Periods 2 and 3 (P>0.1). During simple laboratory experiment, specimens of C. vicinus were covered with a thin layer of sediment, to mimic the earthquake's effect on their survival. A hypothesis was that the timing of both earthquakes had been crucial for decimation of C. vicinus population as they re-suspended sediment with hibernating copepodites. As these became subsequently buried they were deprived of a re-activation signal and exposed prolonged anoxic conditions there. C. quadrangula temporary filled the void left by the copepod, which needed 6 years to regain its dominance. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
