Amphibian declines have been reported worldwide during the last decades. In this study, we focused on the endangered great crested newt (Triturus cristatus), which has suffered from intensive forestry and past mire ditching in the northern verge of its distribution. We collected data from 46 breeding ponds in eastern Finland during 2005–2011 using dip-netting. We modeled breeding success with cost-effective methods by using site-level forest data. The results highlight the importance of herb-rich forests in the vicinity of breeding ponds. Based on the results possible new breeding sites can now be located based on the presence and size of types of nutrient-rich forest, proportion of deciduous trees, young stands, shading and unfavorable habitats in the vicinity of ponds. Also practical conservation measures, like creating new ponds within a certain area, can now be allocated more accurately using the same variables.
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