| a quantitative evaluation of the conservation umbrella of spotted owl management areas in the sierra nevada. | whether by design or default, single species management often serves as an umbrella for species with similar habitat requirements. in recent decades the focus of national forest management in the sierra nevada of california has shifted towards increasing closed canopy mature forest conditions through the protection of areas occupied by the california spotted owl (strix occidentalis occidentalis). to evaluate the implications of these habitat changes and the potential umbrella resulting from a sy ... | 2015 | 25905920 |
| using topography to meet wildlife and fuels treatment objectives in fire-suppressed landscapes. | past forest management practices, fire suppression, and climate change are increasing the need to actively manage california sierra nevada forests for multiple environmental amenities. here we present a relatively low-cost, repeatable method for spatially parsing the landscape to help the u.s. forest service manage for different forest and fuel conditions to meet multiple goals relating to sensitive species, fuels reduction, forest products, water, carbon storage, and ecosystem restoration. usin ... | 2010 | 20872142 |
| occupancy estimation and modeling with multiple states and state uncertainty. | the distribution of a species over space is of central interest in ecology, but species occurrence does not provide all of the information needed to characterize either the well-being of a population or the suitability of occupied habitat. recent methodological development has focused on drawing inferences about species occurrence in the face of imperfect detection. here we extend those methods by characterizing occupied locations by some additional state variable (e.g., as producing young or no ... | 2007 | 17601132 |