Invader removal triggers competitive release in a threatened avian predator
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Abstract
Invasive species can cause extinctions of native species and widespread biodiversity loss. Invader removal is a common management response, but the use of long-term field experiments to characterize effectiveness of removals in benefitting impacted native species is rare. We used a large-scale removal experiment to investigate the demographic response of a threatened native species, the northern spotted owl, to removal of an invasive competitor species, the barred owl. Removal of barred owls had a strong, positive effect on survival of spotted owls, which arrested long-term population declines of spotted owls. The results demonstrate that the long-term persistence of spotted owls will depend heavily on reducing the negative impacts of barred owls while simultaneously addressing other threats, such as habitat loss.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Invader removal triggers competitive release in a threatened avian predator |
| Series title | Proceedings of the National Academy of Sciences of the United States of America (PNAS) |
| DOI | 10.1073/pnas.2102859118 |
| Volume | 118 |
| Issue | 31 |
| Publication Date | July 19, 2021 |
| Year Published | 2021 |
| Language | English |
| Publisher | PNAS |
| Contributing office(s) | Forest and Rangeland Ecosystem Science Center, Patuxent Wildlife Research Center, Southwest Biological Science Center |
| Description | e2102859118, 9 p. |
| Country | United States |
| State | California, Oregon, Washington |