Factors influencing colonization of created habitats by an endangered amphibian species

  • Published source details Kroepfli M. (2011) Factors influencing colonization of created habitats by an endangered amphibian species. MSc. University of Bern.


This study is summarised as evidence for the following.

Action Category

Create ponds for toads

Action Link
Amphibian Conservation
  1. Create ponds for toads

    A replicated, before-and-after study in 2010 of 38 created ponds in an area of forest and agricultural land in Bernese Emmental, Switzerland (Kroepfli 2011) found that midwife toads Alytes obstetricans colonized 29% of ponds and only reproduced in 54% of those. Tadpoles were only recorded at six of the 38 ponds. The number of ponds at a site was positively related to numbers of ponds colonized and toad abundance. Pond age was positively related to colonization and reproduction and the proportion of forest negatively related to reproduction. In 1985–2009, 38 ponds were created for toads over a 2,800 km2 site. Call and visual surveys were undertaken three times and dip-net surveys twice at each pond in April–June 2010.



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