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Dynamics of a declining amphibian metapopulation : Survival, dispersal and the impact of climate

Dynamics of a declining amphibian metapopulation : Survival, dispersal and the impact of climate. Richard A. Griffiths, David Sewell, Rachel S. McCrea. Chris Sugimoto and Quinn Bailey. Great Crested Newt Triturus cristatus. http://people.mokk.bme.hu/~daniel/Heni/regebbi/041Amphibia/.

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Dynamics of a declining amphibian metapopulation : Survival, dispersal and the impact of climate

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  1. Dynamics of a declining amphibian metapopulation: Survival, dispersal and the impact of climate Richard A. Griffiths, David Sewell, Rachel S. McCrea Chris Sugimoto and Quinn Bailey

  2. Great Crested NewtTrituruscristatus http://people.mokk.bme.hu/~daniel/Heni/regebbi/041Amphibia/

  3. Background • Stochastic vs. deterministic • Synchronous vs. asynchronous • Metapopulation model assumptions

  4. Hypotheses • Annual survival varies between subpopulations • Annual survival is related to climatic factors and possibly climate change • Subpopulations display asynchronous dynamics

  5. Methods Pylon Garden 350m 230m Snake 230m Capture-Mark-Recapture Swimming Pool

  6. Population modelling • Adult survival • Juvenile dispersal • 4 Climatic factors http://www.thegwpf.org/uk-summers-back-to-normal/

  7. Results • Adult and larval captures • Larvae present in Garden pond every year

  8. Discussion • Varied survival rates between ponds • Mild, wet winters negatively correlated to survival • Mainland-island system

  9. Supporting Research

  10. Future • Deterministic climate change • Manage for increase recruitment/dispersal

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