| multistate models reveal long-term trends of northern spotted owls in the absence of a novel competitor. | quantifying spatial and temporal variability in population trends is a critical aspect of successful management of imperiled species. we evaluated territory occupancy dynamics of northern spotted owls (strix occidentalis caurina), california, usa, 1990-2014. the study area possessed two unique aspects. first, timber management has occurred for over 100 years, resulting in dramatically different forest successional and structural conditions compared to other areas. second, the barred owl (strix v ... | 2016 | 27065016 |
| genetic structure, introgression, and a narrow hybrid zone between northern and california spotted owls (strix occidentalis). | the northern spotted owl (strix occidentalis caurina) is a threatened subspecies and the california spotted owl (strix occidentalis occidentalis) is a subspecies of special concern in the western united states. concern for their continued viability has arisen because of habitat loss caused by timber harvesting. the taxonomic status of the northern subspecies has been the subject of continuing controversy. we investigated the phylogeographical and population genetic structure of northern and cali ... | 2005 | 15773939 |