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Papers by Christina Vojta

Research paper thumbnail of Old Dog, New Tricks: Innovations With Presence–Absence Information

Journal of Wildlife Management, 2005

... biodiversity. Journal of Wildlife Management 69:3950–966. BioOne. Moore, JE and RKSwihart. 20... more ... biodiversity. Journal of Wildlife Management 69:3950–966. BioOne. Moore, JE and RKSwihart. 2005. Modeling patch ... wildfire. Ecology 92:2, 408-421 Online publication date: 1-Feb-2011. Annie E. Curtis, Peter WC Paton. (2010) Assessing ...

Research paper thumbnail of A technical guide for monitoring wildlife habitat

Research paper thumbnail of Efficacy of scent-detection dogs for locating bat roosts in trees and snags

Wildlife Society Bulletin, 2015

Research paper thumbnail of A Technical Guide for Monitoring Wildlife Habitat Chapter 5. Using Habitat Models for Habitat Mapping and Monitoring 5.1 Objective

Research paper thumbnail of A Technical Guide for Monitoring Wildlife Habitat Chapter 6. Landscape Analysis for Habitat Monitoring 6.1 Objective 6.2 Key Concepts 6.2.1 Landscape Analysis and Adaptive Management

Research paper thumbnail of Genetic Monitoring for Managers: A New Online Resource

Journal of Fish and Wildlife Management, 2011

Monitoring our natural resources will increasingly rely on genetic tools in order to understand a... more Monitoring our natural resources will increasingly rely on genetic tools in order to understand and respond to invasive species, habitat degradation, fragmentation, disease, or climate-related changes. In recent years, the rapidly evolving field of genetic monitoring has seen explosive growth in sampling methods, genetic markers, and analytical approaches designed to estimate a wide range of parameters from connectivity to population growth rates. Some of these methods have taken root and now dominate particular aspects of population assessment and monitoring, whereas others have seen less success in real-world applications. To aid managers and researchers with limited genetics experience, we developed a web-based resource to help them identify which, if any, molecular genetic methods would be appropriate for population assessments or monitoring. The site was developed in cooperation with a team of experts in fields such as evolutionary biology, demographic parameter estimation, and exotic species detection to provide a broad, dynamic, and easily understood resource with limited jargon. The site also provides distilled examples from the recent literature, along with contact information for experts in various techniques. The website, Genetic Monitoring for Managers, is now available at

Research paper thumbnail of Neglect of Genetic Diversity in Implementation of the Convention on Biological Diversity

Conservation Biology, 2010

Research paper thumbnail of Strategies for monitoring terrestrial animals and habitats

This General Technical Report (GTR) addresses monitoring strategies for terrestrial animals and h... more This General Technical Report (GTR) addresses monitoring strategies for terrestrial animals and habitats. It focuses on monitoring associated with National Forest Management Act planning and is intended to apply primarily to monitoring efforts that are broader than individual National Forests. Primary topics covered in the GTR are monitoring requirements; ongoing monitoring programs; key monitoring questions and measures; balancing three necessary and complementary forms of monitoring (targeted, cause-and-effect, and context); sampling design and statistical considerations; use of the data that result from monitoring; and organizational and operational considerations in the development and implementation of monitoring programs. The GTR concludes with a series of recommendations for the ongoing improvement of monitoring of terrestrial animals and their habitat.

Research paper thumbnail of Integrating single-species management and landscape conservation using regional habitat occurrence models: the northern goshawk in the Southwest, USA

Landscape Ecology, 2014

Conservation planners and land managers are often confronted with scale-associated challenges whe... more Conservation planners and land managers are often confronted with scale-associated challenges when assessing the relationship between land management objectives and species conservation. Conservation of individual species typically involves sitelevel analyses of habitat, whereas land management focuses on larger spatial extents. New models are needed to more explicitly integrate species-specific conservation with landscape or regional scales. We address this challenge with an example using the northern goshawk (Accipiter gentilis), a forest raptor with circumpolar distribution that is the focus of intense debate regarding forest management on public lands in the southwestern USA. To address goshawkspecific habitat conservation across a management area of 22,800-km 2 in northern Arizona, we focused on the territory scale rather than individual nest sites. We compiled a 17-year database of 895 nest sites to estimate territory locations. We then estimated the likelihood of territory occurrence for the entire management area using multiple logistic regression within an expert-driven, spatially balanced, and information-theoretic framework. Our occurrence model incorporated forest structure variables that were derived from USFS Forest Inventory and Analysis plots and high-resolution satellite imagery. Results indicated that high canopy-bulk density, intermediate canopy-base heights, and low variation in tree density were strong predictors of territory occurrence. We used model-averaged parameter estimates for these variables to map and explore patterns of territory distribution across multiple land jurisdictions and ecological subregions. Our iterative modeling approach complements previous demographic studies in the region. It also provides a robust framework for integrating species conservation and landscape management in ongoing and future regional planning efforts.

Research paper thumbnail of Old Dog, New Tricks: Innovations With Presence–Absence Information

Journal of Wildlife Management, 2005

... biodiversity. Journal of Wildlife Management 69:3950–966. BioOne. Moore, JE and RKSwihart. 20... more ... biodiversity. Journal of Wildlife Management 69:3950–966. BioOne. Moore, JE and RKSwihart. 2005. Modeling patch ... wildfire. Ecology 92:2, 408-421 Online publication date: 1-Feb-2011. Annie E. Curtis, Peter WC Paton. (2010) Assessing ...

Research paper thumbnail of A technical guide for monitoring wildlife habitat

Research paper thumbnail of Efficacy of scent-detection dogs for locating bat roosts in trees and snags

Wildlife Society Bulletin, 2015

Research paper thumbnail of A Technical Guide for Monitoring Wildlife Habitat Chapter 5. Using Habitat Models for Habitat Mapping and Monitoring 5.1 Objective

Research paper thumbnail of A Technical Guide for Monitoring Wildlife Habitat Chapter 6. Landscape Analysis for Habitat Monitoring 6.1 Objective 6.2 Key Concepts 6.2.1 Landscape Analysis and Adaptive Management

Research paper thumbnail of Genetic Monitoring for Managers: A New Online Resource

Journal of Fish and Wildlife Management, 2011

Monitoring our natural resources will increasingly rely on genetic tools in order to understand a... more Monitoring our natural resources will increasingly rely on genetic tools in order to understand and respond to invasive species, habitat degradation, fragmentation, disease, or climate-related changes. In recent years, the rapidly evolving field of genetic monitoring has seen explosive growth in sampling methods, genetic markers, and analytical approaches designed to estimate a wide range of parameters from connectivity to population growth rates. Some of these methods have taken root and now dominate particular aspects of population assessment and monitoring, whereas others have seen less success in real-world applications. To aid managers and researchers with limited genetics experience, we developed a web-based resource to help them identify which, if any, molecular genetic methods would be appropriate for population assessments or monitoring. The site was developed in cooperation with a team of experts in fields such as evolutionary biology, demographic parameter estimation, and exotic species detection to provide a broad, dynamic, and easily understood resource with limited jargon. The site also provides distilled examples from the recent literature, along with contact information for experts in various techniques. The website, Genetic Monitoring for Managers, is now available at

Research paper thumbnail of Neglect of Genetic Diversity in Implementation of the Convention on Biological Diversity

Conservation Biology, 2010

Research paper thumbnail of Strategies for monitoring terrestrial animals and habitats

This General Technical Report (GTR) addresses monitoring strategies for terrestrial animals and h... more This General Technical Report (GTR) addresses monitoring strategies for terrestrial animals and habitats. It focuses on monitoring associated with National Forest Management Act planning and is intended to apply primarily to monitoring efforts that are broader than individual National Forests. Primary topics covered in the GTR are monitoring requirements; ongoing monitoring programs; key monitoring questions and measures; balancing three necessary and complementary forms of monitoring (targeted, cause-and-effect, and context); sampling design and statistical considerations; use of the data that result from monitoring; and organizational and operational considerations in the development and implementation of monitoring programs. The GTR concludes with a series of recommendations for the ongoing improvement of monitoring of terrestrial animals and their habitat.

Research paper thumbnail of Integrating single-species management and landscape conservation using regional habitat occurrence models: the northern goshawk in the Southwest, USA

Landscape Ecology, 2014

Conservation planners and land managers are often confronted with scale-associated challenges whe... more Conservation planners and land managers are often confronted with scale-associated challenges when assessing the relationship between land management objectives and species conservation. Conservation of individual species typically involves sitelevel analyses of habitat, whereas land management focuses on larger spatial extents. New models are needed to more explicitly integrate species-specific conservation with landscape or regional scales. We address this challenge with an example using the northern goshawk (Accipiter gentilis), a forest raptor with circumpolar distribution that is the focus of intense debate regarding forest management on public lands in the southwestern USA. To address goshawkspecific habitat conservation across a management area of 22,800-km 2 in northern Arizona, we focused on the territory scale rather than individual nest sites. We compiled a 17-year database of 895 nest sites to estimate territory locations. We then estimated the likelihood of territory occurrence for the entire management area using multiple logistic regression within an expert-driven, spatially balanced, and information-theoretic framework. Our occurrence model incorporated forest structure variables that were derived from USFS Forest Inventory and Analysis plots and high-resolution satellite imagery. Results indicated that high canopy-bulk density, intermediate canopy-base heights, and low variation in tree density were strong predictors of territory occurrence. We used model-averaged parameter estimates for these variables to map and explore patterns of territory distribution across multiple land jurisdictions and ecological subregions. Our iterative modeling approach complements previous demographic studies in the region. It also provides a robust framework for integrating species conservation and landscape management in ongoing and future regional planning efforts.