Effects of released farmed mallards on species richness of breeding waterbirds and amphibians in natural, restored, and constructed wetlands

Pär Söderquist, Lisa Dessborn, Henric Djerf, Johan Elmberg, Gunnar Gunnarsson & Sari Holopainen
Common practices in current game management are wetland restoration and creation, as well as releases of quarry species. We studied the impact of releases of mallard ducklings on species richness of wild waterbirds and amphibians on three types of wetlands: natural, constructed and restored. Data on species richness, macrophyte cover and water characteristics (total phosphorous and pH) were collected at 32 sites in an agricultural landscape in southern Sweden. In total, 14 species of waterbirds...
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