Julie Yee (Former Employee)
Science and Products
Filter Total Items: 61
Changes in the abundance and distribution of waterfowl wintering in the Central Valley of California, 1973–2000
The Central Valley of California is one of the most important areas for wintering waterfowl in the world and the focus of extensive conservation efforts to mitigate for historical losses and counter continuing stressors to habitats. To guide conservation, we analyzed trends in the abundance and distribution (spatiotemporal abundance patterns) of waterfowl and their habitats in the...
Authors
Joseph P. Fleskes, Michael L. Casazza, Cory T. Overton, Elliott Matchett, Julie L. Yee
Waterfowl use of wetland habitats informs wetland restoration designs for multi‐species benefits
Extensive global estuarine wetland losses have prompted intensive focus on restoration of these habitats. In California, substantial tracts of freshwater, brackish and tidal wetlands have been lost. Given the anthropogenic footprint of development and urbanization in this region, wetland restoration must rely on conversion of existing habitat types rather than adding new wetlands. These...
Authors
Michael L. Casazza, Fiona McDuie, Scott Jones, Austen Lorenz, Cory T. Overton, Julie L. Yee, Cliff L. Feldheim, Josh T. Ackerman, Karen M. Thorne
Body condition of wintering Pacific greater white-fronted geese
Extreme changes to key waterfowl habitats in the Klamath Basin (KB) on the Oregon–California border and the Sacramento Valley (SV) in California, USA, have occurred since 1980. The spatial distribution of Pacific greater white‐fronted geese (Anser albifrons sponsa; geese) has likewise changed among these areas and population size has grown from 79,000 to >600,000 geese during the same...
Authors
Daniel A. Skalos, John M. Eadie, Daniel R. Yparraguirre, Melanie L. Weaver, Shaun L. Oldenburger, Craig R. Ely, Julie L. Yee, Joseph P. Fleskes
Habitat features predict carrying capacity of a recovering marine carnivore
The recovery of large carnivore species from over‐exploitation can have socioecological effects; thus, reliable estimates of potential abundance and distribution represent a valuable tool for developing management objectives and recovery criteria. For sea otters (Enhydra lutris), as with many apex predators, equilibrium abundance is not constant across space but rather varies as a...
Authors
M. Tim Tinker, Julie L. Yee, Kristin L. Laidre, Brian B. Hatfield, Michael D. Harris, Joseph A. Tomoleoni, Tom W. Bell, Emily Saarman, Lilian P. Carswell, A. Keith Miles
Feral burros and other influences on desert tortoise presence in the western Sonoran Desert
Across the globe, conflicting priorities exist in how land and resources are managed. In the American West, conflicts are common on public lands with historical mandates for multiple uses. We explored the impacts of multiple uses of land in a case study of Agassiz's Desert Tortoises (Gopherus agassizii), a federally threatened species, in the western Sonoran Desert. The tortoise has...
Authors
Kristin H. Berry, Julie L. Yee, Lisa M. Lyren
Southern (California) sea otter population status and trends at San Nicolas Island, 2017–2020
The southern sea otter (Enhydra lutris nereis) population at San Nicolas Island, California, has been monitored annually since the translocation of 140 sea otters to the island was completed in 1990. Monitoring efforts have varied in frequency and type across years. In 2017, the U.S. Navy and the U.S. Fish and Wildlife Service initiated a sea otter monitoring and research plan to...
Authors
Julie L. Yee, Joseph A. Tomoleoni, Michael C. Kenner, Jessica A. Fujii, Gena B. Bentall, M. Tim Tinker, Brian B. Hatfield
The distribution of woody species in relation to climate and fire in Yosemite National Park, California, USA
BackgroundThe effects of climate on plant species ranges are well appreciated, but the effects of other processes, such as fire, on plant species distribution are less well understood. We used a dataset of 561 plots 0.1 ha in size located throughout Yosemite National Park, in the Sierra Nevada of California, USA, to determine the joint effects of fire and climate on woody plant species...
Authors
Jan W Van Wagtendonk, Peggy E. Moore, Julie L. Yee, James A. Lutz
The catastrophic decline of tortoises at a fenced natural area
Agassiz’s desert tortoise (Gopherus agassizii), a threatened species of the southwestern United States, has severely declined to the point where 76% of populations in critical habitat (Tortoise Conservation Areas) are below viability. The potential for rapid recovery of wild populations is low because females require 12–20 years to reach reproductive maturity and produce few eggs...
Authors
Kristin H. Berry, Julie L. Yee, Timothy M. Shields, Laura Stockton
Good prospects: High-resolution telemetry data suggests novel brood-site selection behavior in waterfowl
Breeding success should increase with prior knowledge of the surrounding environment, which is dependent upon an animal’s ability to evaluate habitat. Prospecting for nesting locations and migratory stop-over sites are well-established behaviors among bird species. We assessed whether ducks in Suisun Marsh, California, USA, a brackish marsh, prospect for suitable wetlands in the week...
Authors
Michael L. Casazza, Fiona McDuie, Austen Lorenz, David A. Keiter, Julie L. Yee, Cory T. Overton, Sarah H. Peterson, Cliff L. Feldheim, Josh T. Ackerman
Learning from real-world experience to understand renewable energy impacts to wildlife
The project team sought to use real-world data to understand adverse effects to wildlife of renewable energy production that is critical to meeting California’s climate and clean energy goals. The project had three main components. First, a systematic literature review studied 20 peer-reviewed publications and 612 reports from other nonreviewed sources from 231 wind and solar facilities...
Authors
Tara Conkling, Hannah B. Vander Zanden, Sharon Poessel, Scott R Loss, Taber Allison, James Diffendorfer, Adam E. Duerr, David Mcgovern Nelson, Julie L. Yee, Todd Eli Katzner
Assessing population-level consequences of anthropogenic stressors for terrestrial wildlife
Human activity influences wildlife. However, the ecological and conservation significances of these influences are difficult to predict and depend on their population‐level consequences. This difficulty arises partly because of information gaps, and partly because the data on stressors are usually collected in a count‐based manner (e.g., number of dead animals) that is difficult to...
Authors
Todd Eli Katzner, Melissa Braham, Tara Conkling, James Diffendorfer, Adam E. Duerr, Scott R Loss, David Mcgovern Nelson, Hannah B. Vander Zanden, Julie L. Yee
An uncertain future for a population of desert tortoises experiencing human impacts
We evaluated the status of a population of Mojave Desert Tortoises (Gopherus agassizii), a threatened species, in the El Paso Mountains of the northwestern Mojave Desert in California, USA. The study area lies north of and adjacent to a designated critical habitat unit for the species, is adjacent to a state park, and is a short distance from the Desert Tortoise Research Natural Area. We...
Authors
Kristin H. Berry, Julie L. Yee, Lisa M. Lyren, Jeremy S. Mack
Science and Products
Filter Total Items: 61
Changes in the abundance and distribution of waterfowl wintering in the Central Valley of California, 1973–2000
The Central Valley of California is one of the most important areas for wintering waterfowl in the world and the focus of extensive conservation efforts to mitigate for historical losses and counter continuing stressors to habitats. To guide conservation, we analyzed trends in the abundance and distribution (spatiotemporal abundance patterns) of waterfowl and their habitats in the...
Authors
Joseph P. Fleskes, Michael L. Casazza, Cory T. Overton, Elliott Matchett, Julie L. Yee
Waterfowl use of wetland habitats informs wetland restoration designs for multi‐species benefits
Extensive global estuarine wetland losses have prompted intensive focus on restoration of these habitats. In California, substantial tracts of freshwater, brackish and tidal wetlands have been lost. Given the anthropogenic footprint of development and urbanization in this region, wetland restoration must rely on conversion of existing habitat types rather than adding new wetlands. These...
Authors
Michael L. Casazza, Fiona McDuie, Scott Jones, Austen Lorenz, Cory T. Overton, Julie L. Yee, Cliff L. Feldheim, Josh T. Ackerman, Karen M. Thorne
Body condition of wintering Pacific greater white-fronted geese
Extreme changes to key waterfowl habitats in the Klamath Basin (KB) on the Oregon–California border and the Sacramento Valley (SV) in California, USA, have occurred since 1980. The spatial distribution of Pacific greater white‐fronted geese (Anser albifrons sponsa; geese) has likewise changed among these areas and population size has grown from 79,000 to >600,000 geese during the same...
Authors
Daniel A. Skalos, John M. Eadie, Daniel R. Yparraguirre, Melanie L. Weaver, Shaun L. Oldenburger, Craig R. Ely, Julie L. Yee, Joseph P. Fleskes
Habitat features predict carrying capacity of a recovering marine carnivore
The recovery of large carnivore species from over‐exploitation can have socioecological effects; thus, reliable estimates of potential abundance and distribution represent a valuable tool for developing management objectives and recovery criteria. For sea otters (Enhydra lutris), as with many apex predators, equilibrium abundance is not constant across space but rather varies as a...
Authors
M. Tim Tinker, Julie L. Yee, Kristin L. Laidre, Brian B. Hatfield, Michael D. Harris, Joseph A. Tomoleoni, Tom W. Bell, Emily Saarman, Lilian P. Carswell, A. Keith Miles
Feral burros and other influences on desert tortoise presence in the western Sonoran Desert
Across the globe, conflicting priorities exist in how land and resources are managed. In the American West, conflicts are common on public lands with historical mandates for multiple uses. We explored the impacts of multiple uses of land in a case study of Agassiz's Desert Tortoises (Gopherus agassizii), a federally threatened species, in the western Sonoran Desert. The tortoise has...
Authors
Kristin H. Berry, Julie L. Yee, Lisa M. Lyren
Southern (California) sea otter population status and trends at San Nicolas Island, 2017–2020
The southern sea otter (Enhydra lutris nereis) population at San Nicolas Island, California, has been monitored annually since the translocation of 140 sea otters to the island was completed in 1990. Monitoring efforts have varied in frequency and type across years. In 2017, the U.S. Navy and the U.S. Fish and Wildlife Service initiated a sea otter monitoring and research plan to...
Authors
Julie L. Yee, Joseph A. Tomoleoni, Michael C. Kenner, Jessica A. Fujii, Gena B. Bentall, M. Tim Tinker, Brian B. Hatfield
The distribution of woody species in relation to climate and fire in Yosemite National Park, California, USA
BackgroundThe effects of climate on plant species ranges are well appreciated, but the effects of other processes, such as fire, on plant species distribution are less well understood. We used a dataset of 561 plots 0.1 ha in size located throughout Yosemite National Park, in the Sierra Nevada of California, USA, to determine the joint effects of fire and climate on woody plant species...
Authors
Jan W Van Wagtendonk, Peggy E. Moore, Julie L. Yee, James A. Lutz
The catastrophic decline of tortoises at a fenced natural area
Agassiz’s desert tortoise (Gopherus agassizii), a threatened species of the southwestern United States, has severely declined to the point where 76% of populations in critical habitat (Tortoise Conservation Areas) are below viability. The potential for rapid recovery of wild populations is low because females require 12–20 years to reach reproductive maturity and produce few eggs...
Authors
Kristin H. Berry, Julie L. Yee, Timothy M. Shields, Laura Stockton
Good prospects: High-resolution telemetry data suggests novel brood-site selection behavior in waterfowl
Breeding success should increase with prior knowledge of the surrounding environment, which is dependent upon an animal’s ability to evaluate habitat. Prospecting for nesting locations and migratory stop-over sites are well-established behaviors among bird species. We assessed whether ducks in Suisun Marsh, California, USA, a brackish marsh, prospect for suitable wetlands in the week...
Authors
Michael L. Casazza, Fiona McDuie, Austen Lorenz, David A. Keiter, Julie L. Yee, Cory T. Overton, Sarah H. Peterson, Cliff L. Feldheim, Josh T. Ackerman
Learning from real-world experience to understand renewable energy impacts to wildlife
The project team sought to use real-world data to understand adverse effects to wildlife of renewable energy production that is critical to meeting California’s climate and clean energy goals. The project had three main components. First, a systematic literature review studied 20 peer-reviewed publications and 612 reports from other nonreviewed sources from 231 wind and solar facilities...
Authors
Tara Conkling, Hannah B. Vander Zanden, Sharon Poessel, Scott R Loss, Taber Allison, James Diffendorfer, Adam E. Duerr, David Mcgovern Nelson, Julie L. Yee, Todd Eli Katzner
Assessing population-level consequences of anthropogenic stressors for terrestrial wildlife
Human activity influences wildlife. However, the ecological and conservation significances of these influences are difficult to predict and depend on their population‐level consequences. This difficulty arises partly because of information gaps, and partly because the data on stressors are usually collected in a count‐based manner (e.g., number of dead animals) that is difficult to...
Authors
Todd Eli Katzner, Melissa Braham, Tara Conkling, James Diffendorfer, Adam E. Duerr, Scott R Loss, David Mcgovern Nelson, Hannah B. Vander Zanden, Julie L. Yee
An uncertain future for a population of desert tortoises experiencing human impacts
We evaluated the status of a population of Mojave Desert Tortoises (Gopherus agassizii), a threatened species, in the El Paso Mountains of the northwestern Mojave Desert in California, USA. The study area lies north of and adjacent to a designated critical habitat unit for the species, is adjacent to a state park, and is a short distance from the Desert Tortoise Research Natural Area. We...
Authors
Kristin H. Berry, Julie L. Yee, Lisa M. Lyren, Jeremy S. Mack