Study lake: subalpine Lake Lunz (604 m a.s.l.; 68 ha, 34 m max. depth)
We monitor Lake Lunz (part of the GLEON network; together with the AquaScale lab):
- Depth profiles of lake temperature, oxygen, pH, conductivity, chl-a (daily)
- CO2 and CH4 emissions (daily)
- Dissolved (DOC) and particulate (POC) organic carbon (once per month)
- Nutrients (NO2, NO3, NH4, PO4) and phosphorous (soluble reactive and particulate)
- Lake seston (0.7 - 30 um) and zooplankton (once per month)
We monitor Lake Lunz (part of the GLEON network; together with the AquaScale lab):
- Depth profiles of lake temperature, oxygen, pH, conductivity, chl-a (daily)
- CO2 and CH4 emissions (daily)
- Dissolved (DOC) and particulate (POC) organic carbon (once per month)
- Nutrients (NO2, NO3, NH4, PO4) and phosphorous (soluble reactive and particulate)
- Lake seston (0.7 - 30 um) and zooplankton (once per month)
Streams within and around the Lake Lunz catchment
We investigate the trophic fate of diet sources (allochthonous and autochthonous), using stable isotopes, lipids and their fatty acids, and compound-specific stable isotopes (see lab) in stream food webs (periphyton, leaf litter, macroinvertebrates, fishes) at different altitudinal gradients (1100 - 550 m a.s.l.) and stream orders. Most of these streams are pristine and offer thus unique study areas for central Europe.
We investigate the trophic fate of diet sources (allochthonous and autochthonous), using stable isotopes, lipids and their fatty acids, and compound-specific stable isotopes (see lab) in stream food webs (periphyton, leaf litter, macroinvertebrates, fishes) at different altitudinal gradients (1100 - 550 m a.s.l.) and stream orders. Most of these streams are pristine and offer thus unique study areas for central Europe.
Fish lab (12 tanks; 1000 L each, source water supply ~1 L/sec for each tank; automatic feeders; light control)
We test how fishes respond to feeds of different biochemical composition. This facility is operated all year long and we preform research mostly on freshwater salmonids (e.g., trout and charr). We investigate somatic response parameters (fish growth, egg production, survival), diet retention in fish tissues (e.g., liver, muscles, brain, eyes, and eggs) using stable isotopes, fatty acids, compound-specific stable isotopes, and fish behavior.
We test how fishes respond to feeds of different biochemical composition. This facility is operated all year long and we preform research mostly on freshwater salmonids (e.g., trout and charr). We investigate somatic response parameters (fish growth, egg production, survival), diet retention in fish tissues (e.g., liver, muscles, brain, eyes, and eggs) using stable isotopes, fatty acids, compound-specific stable isotopes, and fish behavior.
Mesocosms (24 outdoor mesocosms; 400 L each)
We typically perform long-term feeding experiments on, a) algae-bacteria-zooplankton interactions, b) terrestrial matter versus primary producers to consumer interactions, and, c) effects of ecotoxicological stressors, including heavy metals (e.g., Hg) and agrochemicals on plankton. These mesocosms are filled with lake water from Lake Lunz, they can be temperature controlled, are steadily supplied with air, and monitored via the internet.
We typically perform long-term feeding experiments on, a) algae-bacteria-zooplankton interactions, b) terrestrial matter versus primary producers to consumer interactions, and, c) effects of ecotoxicological stressors, including heavy metals (e.g., Hg) and agrochemicals on plankton. These mesocosms are filled with lake water from Lake Lunz, they can be temperature controlled, are steadily supplied with air, and monitored via the internet.