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Jürgen Kreyling: Theses offered

Bachelor's Theses offered

>> Eigene Themenvorschläge im Rahmen der Forschungsaktivitäten der Störungsökologie sind herzlich willkommen! <<

Contact: Anke Jentsch, Carl Beierkuhnlein, Jürgen Kreyling
Auswirkungen von Wärmepulsen im Winter auf das Wurzelwachstum von Gräsern, Kräutern und Zwergsträuchern more

Contact: Jürgen Kreyling, Jan Schürings, Anke Jentsch
Ökologischer Funktionsverlust bei letaler Dürre more

Contact: Anke Jentsch, Jürgen Kreyling, Carl Beierkuhnlein
Welche Pflanzen mögen es wärmer? more

Contact: Jürgen Kreyling, Andrey Malyshev
Freilandexperiment zum Klimawandel (EVENT II): Vegetationsdynamik und Wetterextreme - der Einfluss von Niederschlagsvariabilität, Jahreszeitlicher Erwärmung und Landnutzung more

Contact: Anke Jentsch, Jürgen Kreyling, Carl Beierkuhnlein
Frosttoleranz der Buche in verschiedenen geo-graphischen Herkünften & Klimawandelszenarien more

Contact: Jürgen Kreyling, Constanze Buhk
European gradients of resilience in the face of climate extremes

SIGNAL is a joint experimental research activity across eight European countries combining biodiversity experiments, climate change research, and invasion research. Extreme weather events and the presence of invasive species can act as pressures threatening biodiversity, resilience and ecosystem services of semi-natural grasslands and can suddenly drive them beyond thresholds of system integrity. In a field experiment, stability of natural grassland communities (including invasives or not) against drought will be assessed and the influence of mowing height will be tested.

Contact: Anke Jentsch, Jürgen Kreyling
Performance of invasive species in natural grasslands under drought and different mowing heights

Rationale: The SIGNAL field site within the ÖBG will comprise natural grassland communities including legume- and non-legume invaders or not, and will be exposed to different mowing heights. The goal is to assess the performance of the invaders depending on drought and mowing regime by assessing multiple parameters (survival, growth, fecundity). Methods: Assessment of invader performance, data analysis time: anytime during summer 2013

Contact: Anke Jentsch, Jürgen Kreyling
Soil respiration, decomposition and soil faunal activity under drought and invasive pressure

The SIGNAL field site within the ÖBG will comprise natural grassland communities including legume- and non-legume invaders or not, and will be exposed to different mowing heights and extreme drought. Soil parameters to determine carbon and nutrient cycling and activity will be assessed before, during and after drought. Methods: Assessment of soil respiration, decomposition and other soil parameters time: anytime during summer 2013

Contact: Anke Jentsch, Jürgen Kreyling
Effects of drought, invader presence and mowing regime on natural grassland productivity and resilience

Rationale: The SIGNAL field site within the ÖBG will comprise natural grassland communities including legume- and non-legume invaders or not, and will be exposed to different mowing heights and extreme drought. The goal of this work will be to assess the productivity of the natural grassland in response to these drivers of environmental change. Further, methods to assess resilience should be developed and applied. Methods: Quantification of biomass production time: anytime during summer 2013

Contact: Anke Jentsch, Jürgen Kreyling
Characterisation of European grasslands using remote sensing data

Rationale: The SIGNAL experiment will comprise natural grassland communities throughout a European gradient. The goal of the analysis will be to characterise locations, status, and composition of these grassland communties and their climatic drivers. Methods: Remote sensing, GIS time: anytime during summer 2013

Contact: Anke Jentsch, Jürgen Kreyling
Ökologischer Funktionsverlust bei letaler Dürre

Im Experiment EVENT 1 wurde im Sommer 2011 die Reaktion verschiedener ökologischer Parameter auf letale Dürre untersucht. In Abschlussarbeiten sollen hoch aufgelöste Zeitreihen des Funktionsverlustes zu einzelnen Parametern analysiert werden. Dabei geht es vor allem um den Gehalt an Stressenzymen und spezifischen Proteinen. Die Daten sind bereits vorhanden. Methodik: vorhandenen Datensatz auswerten Zeit: jederzeit

Contact: Jürgen Kreyling, Anke Jentsch

Master's Theses offered

Auswirkungen von Wärmepulsen im Winter auf das Wurzelwachstum von Gräsern, Kräutern und Zwergsträuchern more

Contact: Jürgen Kreyling, Jan Schürings, Anke Jentsch
European gradients of resilience in the face of climate extremes

SIGNAL is a joint experimental research activity across eight European countries combining biodiversity experiments, climate change research, and invasion research. Extreme weather events and the presence of invasive species can act as pressures threatening biodiversity, resilience and ecosystem services of semi-natural grasslands and can suddenly drive them beyond thresholds of system integrity. In a field experiment, stability of natural grassland communities (including invasives or not) against drought will be assessed and the influence of mowing height will be tested.

Contact: Anke Jentsch, Jürgen Kreyling
Effects of drought, invader presence and mowing regime on natural grassland productivity and resilience

Rationale: The SIGNAL field site within the ÖBG will comprise natural grassland communities including legume- and non-legume invaders or not, and will be exposed to different mowing heights and extreme drought. The goal of this work will be to assess the productivity of the natural grassland in response to these drivers of environmental change. Further, methods to assess resilience should be developed and applied. Methods: Quantification of biomass production time: anytime during summer 2013

Contact: Anke Jentsch, Jürgen Kreyling
Ökologischer Funktionsverlust bei letaler Dürre more

Contact: Anke Jentsch, Jürgen Kreyling, Carl Beierkuhnlein
Welche Pflanzen mögen es wärmer? more

Contact: Jürgen Kreyling, Andrey Malyshev
Performance of invasive species in natural grasslands under drought and different mowing heights

Rationale: The SIGNAL field site within the ÖBG will comprise natural grassland communities including legume- and non-legume invaders or not, and will be exposed to different mowing heights. The goal is to assess the performance of the invaders depending on drought and mowing regime by assessing multiple parameters (survival, growth, fecundity). Methods: Assessment of invader performance, data analysis time: anytime during summer 2013

Contact: Anke Jentsch, Jürgen Kreyling
Ökologischer Funktionsverlust bei letaler Dürre

Im Experiment EVENT 1 wurde im Sommer 2011 die Reaktion verschiedener ökologischer Parameter auf letale Dürre untersucht. In Abschlussarbeiten sollen hoch aufgelöste Zeitreihen des Funktionsverlustes zu einzelnen Parametern analysiert werden. Dabei geht es vor allem um den Gehalt an Stressenzymen und spezifischen Proteinen. Die Daten sind bereits vorhanden. Methodik: vorhandenen Datensatz auswerten Zeit: jederzeit

Contact: Jürgen Kreyling, Anke Jentsch
Freilandexperiment zum Klimawandel (EVENT II): Vegetationsdynamik und Wetterextreme - der Einfluss von Niederschlagsvariabilität, Jahreszeitlicher Erwärmung und Landnutzung more

Contact: Anke Jentsch, Jürgen Kreyling, Carl Beierkuhnlein
Soil respiration, decomposition and soil faunal activity under drought and invasive pressure

The SIGNAL field site within the ÖBG will comprise natural grassland communities including legume- and non-legume invaders or not, and will be exposed to different mowing heights and extreme drought. Soil parameters to determine carbon and nutrient cycling and activity will be assessed before, during and after drought. Methods: Assessment of soil respiration, decomposition and other soil parameters time: anytime during summer 2013

Contact: Anke Jentsch, Jürgen Kreyling
Frosttoleranz der Buche in verschiedenen geo-graphischen Herkünften & Klimawandelszenarien more

Contact: Jürgen Kreyling, Constanze Buhk
Characterisation of European grasslands using remote sensing data

Rationale: The SIGNAL experiment will comprise natural grassland communities throughout a European gradient. The goal of the analysis will be to characterise locations, status, and composition of these grassland communties and their climatic drivers. Methods: Remote sensing, GIS time: anytime during summer 2013

Contact: Anke Jentsch, Jürgen Kreyling