Study

Colonization of restored wetlands by amphibians in Minnesota

  • Published source details Lehtinen R.M. & Galatowitsch S.M. (2001) Colonization of restored wetlands by amphibians in Minnesota. American Midland Naturalist, 145, 388-396.

Actions

This study is summarised as evidence for the following.

Action Category

Restore wetland

Action Link
Amphibian Conservation
  1. Restore wetland

    A replicated, site comparison study in 1998 of seven restored wetlands in Minnesota, USA (Lehtinen & Galatowitsch 2001) found that eight amphibian species rapidly colonized the wetlands and four of those established breeding populations. Natural wetlands supported an additional four species. However, there was no significant difference between average numbers of species in restored and natural wetlands (4 vs 5). Six of the seven restored wetlands supported amphibian populations. Species richness increased with restored wetland size and proximity to source ponds. Wetlands were restored 5–20 months before the study, by destroying drainage tiles or filling ditches to allow flooding. Five natural wetlands were surveyed for comparison. Wetlands were seasonal to semi-permanent and were 0.1–8.6 ha in size. Amphibians were monitored on five visits in April–July 1998 using visual encounter and call surveys along wetland edges. Larval sampling was also carried out using five activity and five minnow traps along pond edges.

     

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