Climate Forcing in the Field Vole from Central Europe

摘要: Ana Gouveia Emil Tkadlec Page 1 Climate Forcing in the Field Vole from Central Europe Ana Gouveia Emil Tkadlec Page 2 Population Cycles • Observed in a variety of species • Widespread Page 3 Outline ▪ Introduction Page 4 Collapsing and even Disappearing Observed in central and northern Europe Cycles - Vole Population High-amplitude oscillations Low-amplitude oscillations Ims et al (2008) Page 5 Causes – key contention • Geographical pattern leads to the hypothesis that large-scale winter climate forcing is responsible for this uniform regime shift. However • Evidence from Finland argues against winter climate forcing as a general explanation. (Korpella et al. 2013) Page 6 Methods: • Field vole - Microtus agrestis • Distribution covers • Suitable to use in comparative studies. • 25 years of time series data from Czech Republic. Page 7 Ore Mts. (3 time series Grid B, C, D) Giant Mts. (1 time series Grid A) Page …