Publications by authors named "Keith A Hamm"
We conducted a range-wide investigation of the dynamics of site-level reproductive rate of northern spotted owls using survey data from 11 study areas across the subspecies geographic range collected during 1993-2018. Our analytical approach accounted for imperfect detection of owl pairs and misclassification of successful reproduction (i.e.
View Article and Find Full Text PDFInvader removal triggers competitive release in a threatened avian predator.
Proc Natl Acad Sci U S A
August 2021
Article Synopsis
- Invasive species, like the barred owl, can cause big problems for native animals, such as the northern spotted owl, by competing for food and space.
- A study showed that when barred owls were removed, the northern spotted owls did better, with more surviving and moving around.
- The northern spotted owl population started to stabilize in areas where barred owls were taken out, but it continued to decline in places where they were still present.
Slow ecological processes challenge conservation. Short-term variability can obscure the importance of slower processes that may ultimately determine the state of a system. Furthermore, management actions with slow responses can be hard to justify.
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