A Yosemite toad on a road. Amphibians and reptiles are particularly susceptible to negative effects of roads within their habitat. Many are slow moving, do not avoid roads, and are simply too small for drivers to see and avoid. During rains many amphibians travel long distances regardless of the presence of intersecting roadways.
Cheryl Brehme (Former Employee)
Science and Products
Reptile and Amphibian Road Ecology
Stephens’ Kangaroo Rat Research and Monitoring Program
Pacific Pocket Mouse Monitoring and Research Program
Species Observations from Pitfall Trap Arrays, Species Pool Matrices, and Patch Locations in Southern California from 1995-2015 Species Observations from Pitfall Trap Arrays, Species Pool Matrices, and Patch Locations in Southern California from 1995-2015
Masticophis occupancy in southern California, 1995-2000 Masticophis occupancy in southern California, 1995-2000
A Yosemite toad on a road. Amphibians and reptiles are particularly susceptible to negative effects of roads within their habitat. Many are slow moving, do not avoid roads, and are simply too small for drivers to see and avoid. During rains many amphibians travel long distances regardless of the presence of intersecting roadways.
Conservation Canine alerts his handler that Pacific pocket mouse scent
Conservation Canine alerts his handler that Pacific pocket mouse scent
Pacific pocket mouse in Sherman trap
Pacific pocket mouse in Sherman trap
Pacific pocket mouse in hand
Pacific pocket mouse in hand
Long-term occupancy monitoring reveals value of moderate disturbance for an open-habitat specialist, the Stephens' kangaroo rat (Dipodomys stephensi) Long-term occupancy monitoring reveals value of moderate disturbance for an open-habitat specialist, the Stephens' kangaroo rat (Dipodomys stephensi)
Interactions among rainfall, fire, forbs and non-native grasses predict occupancy dynamics for the endangered Pacific pocket mouse (Perognathus longimembris pacificus) in a Mediterranean-type ecosystem Interactions among rainfall, fire, forbs and non-native grasses predict occupancy dynamics for the endangered Pacific pocket mouse (Perognathus longimembris pacificus) in a Mediterranean-type ecosystem
Fecal metabarcoding of the endangered Pacific pocket mouse (Perognathus longimembris pacificus) reveals a diverse and forb rich diet that reflects local habitat availability Fecal metabarcoding of the endangered Pacific pocket mouse (Perognathus longimembris pacificus) reveals a diverse and forb rich diet that reflects local habitat availability
Interstate 15 wildlife crossing design considerations for focal wildlife species - Santa Ana-Palomar Mountains Linkage southern California Interstate 15 wildlife crossing design considerations for focal wildlife species - Santa Ana-Palomar Mountains Linkage southern California
Elevated road segment (ERS) passage design may provide enhanced connectivity for amphibians, reptiles, and small mammals Elevated road segment (ERS) passage design may provide enhanced connectivity for amphibians, reptiles, and small mammals
Internal structural cover and ledges facilitate the use of large underpasses by multiple wildlife species and groups Internal structural cover and ledges facilitate the use of large underpasses by multiple wildlife species and groups
Quantitative SWOT analysis: A structured and collaborative approach to reintroduction site selection for the endangered Pacific pocket mouse Quantitative SWOT analysis: A structured and collaborative approach to reintroduction site selection for the endangered Pacific pocket mouse
Research to inform passage spacing for migratory amphibians and to evaluate efficacy and designs for open elevated road segment (ERS) passages Research to inform passage spacing for migratory amphibians and to evaluate efficacy and designs for open elevated road segment (ERS) passages
Range-wide persistence of the endangered arroyo toad (Anaxyrus californicus) for 20+ years following a prolonged drought Range-wide persistence of the endangered arroyo toad (Anaxyrus californicus) for 20+ years following a prolonged drought
Impacts of a non-indigenous ecosystem engineer, the American beaver (Castor canadensis), in a biodiversity hotspot Impacts of a non-indigenous ecosystem engineer, the American beaver (Castor canadensis), in a biodiversity hotspot
Responses of migratory amphibians to barrier fencing inform the spacing of road underpasses: A case study with California tiger salamanders (Ambystoma californiense) in Stanford, CA, USA Responses of migratory amphibians to barrier fencing inform the spacing of road underpasses: A case study with California tiger salamanders (Ambystoma californiense) in Stanford, CA, USA
Predictability of invasive Argentine ant distribution across Mediterranean ecoregions of southern California Predictability of invasive Argentine ant distribution across Mediterranean ecoregions of southern California
Science and Products
Reptile and Amphibian Road Ecology
Stephens’ Kangaroo Rat Research and Monitoring Program
Pacific Pocket Mouse Monitoring and Research Program
Species Observations from Pitfall Trap Arrays, Species Pool Matrices, and Patch Locations in Southern California from 1995-2015 Species Observations from Pitfall Trap Arrays, Species Pool Matrices, and Patch Locations in Southern California from 1995-2015
Masticophis occupancy in southern California, 1995-2000 Masticophis occupancy in southern California, 1995-2000
A Yosemite toad on a road. Amphibians and reptiles are particularly susceptible to negative effects of roads within their habitat. Many are slow moving, do not avoid roads, and are simply too small for drivers to see and avoid. During rains many amphibians travel long distances regardless of the presence of intersecting roadways.
A Yosemite toad on a road. Amphibians and reptiles are particularly susceptible to negative effects of roads within their habitat. Many are slow moving, do not avoid roads, and are simply too small for drivers to see and avoid. During rains many amphibians travel long distances regardless of the presence of intersecting roadways.
Conservation Canine alerts his handler that Pacific pocket mouse scent
Conservation Canine alerts his handler that Pacific pocket mouse scent
Pacific pocket mouse in Sherman trap
Pacific pocket mouse in Sherman trap
Pacific pocket mouse in hand
Pacific pocket mouse in hand