Western Ecological Research Center

Publications

Below is a list of WERC's peer-reviewed publications. If you are searching for a specific publication and cannot find it in this list, please contact werc_web@usgs.gov

Filter Total Items: 3,300
Publication Thumbnail
Year Published: 2021

The Coyote Mountains’ desert snail (Sonorelix harperi carrizoensis), a lazarus species With the first documentation of live individuals

The Coyote Mountain desert snail (Sonorelix harperi carrizoensis) was described in 1937 from 30 dry shells collected the previous year. We reviewed the literature and museum records and found two additional shell collections for this subspecies from the type locality one from 1958, and one from an adjacent mountain range in 1938. There is no...

Fisher, Robert N.; Fisher, Samuel Rosen

Publication Thumbnail
Year Published: 2021

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...

Tinker, M. Tim; Yee, Julie L.; Laidre, Kristin L.; Hatfield, Brian; Harris, Michael D.; Tomoleoni, Joseph; Bell, Tom W.; Saarman, Emily; Carswell, Lilian P; Miles, A. Keith

Publication Thumbnail
Year Published: 2021

Seed production patterns of surviving Sierra Nevada conifers show minimal change following drought

Reproduction is a key component of ecological resilience in forest ecosystems, so understanding how seed production is influenced by extreme drought is key to understanding forest recovery trajectories. If trees respond to mortality-inducing drought by preferentially allocating resources for reproduction, the recovery of the stand to pre-drought...

Wright, Micah Charles; van Mantgem, Phillip J.; Stephenson, Nathan L.; Das, Adrian; Keeley, Jon

Publication Thumbnail
Year Published: 2021

Exposure to domoic acid is an ecological driver of cardiac disease in southern sea otters

Harmful algal blooms produce toxins that bioaccumulate in the food web and adversely affect humans, animals, and entire marine ecosystems. Blooms of the diatom Pseudo-nitzschia can produce domoic acid (DA), a toxin that most commonly causes neurological disease in endothermic animals, with cardiovascular effects that were first...

Moriarty, Megan E; Tinker, M Tim; Miller, Melissa; Tomoleoni, Joseph; Staedler, Michelle M.; Fujii, Jessica A.; Batac, Francesca I.; Dodd, Erin M.; Kudela, Raphael M.; Zubkousky-White, Vanessa; Johnson, Christine K.

Publication Thumbnail
Year Published: 2021

Visualization of schistosomiasis snail habitats using light unmanned aerial vehicles

Schistosomiasis, or “snail fever”, is a parasitic disease affecting over 200 million people worldwide. People become infected when exposed to water containing particular species of freshwater snails. Habitats for such snails can be mapped using lightweight, inexpensive and field-deployable consumer-grade Unmanned Aerial Vehicles (UAVs), also known...

Chamberlin, Andrew J; Jones, Isabel J.; Lund, Andrea J; Jouanard, Nicolas; Riveau, Gilles; Ndione, Raphaël; Sokolow, Susanne H.; Wood, Chelsea L.; Lafferty, Kevin D.; De Leo, Giulio A.

Publication Thumbnail
Year Published: 2021

Effects of postfire climate and seed availability on postfire conifer regeneration

Large, severe fires are becoming more frequent in many forest types across the western United States and have resulted in tree mortality across tens of thousands of hectares. Conifer regeneration in these areas is limited because seeds must travel long distances to reach the interior of large burned patches and establishment is jeopardized by...

Stewart, Joseph A E; van Mantgem, Phillip J.; Young, Derek J N; Shive, Kristen L.; Preisler, Haiganoush K.; Das, Adrian; Stephenson, Nathan L.; Keeley, Jon; Safford, Hugh D.; Wright, Micah Charles; Welch, Kevin R; Thorne, James H.

Publication Thumbnail
Year Published: 2021

Behavioral responses across a mosaic of ecosystem states restructure a sea otter–urchin trophic cascade

Consumer and predator foraging behavior can impart profound trait-mediated constraints on community regulation that scale up to influence the structure and stability of ecosystems. Here, we demonstrate how the behavioral response of an apex predator to changes in prey behavior and condition can dramatically alter the role and relative contribution...

Smith, Joshua G; Tomoleoni, Joseph; Staedler, Michelle M.; Lyon, Sophia; Fujii, Jessica; Tinker, M Tim

Publication Thumbnail
Year Published: 2021

Examining the potential conflict between sea otter recovery and Dungeness crab fisheries in California

Human exploitation of marine mammals led to precipitous declines in many wild populations within the last three centuries. Legal protections enacted throughout the 20th century have enabled the recovery of many of these species and some recoveries have resulted in conflict with humans for shared resources. With legal protections and reintroduction...

Boustany, Andre M.; Hernandez, David; Miller, Emily A; Fujii. Jessica; Nicholson, Teri E.; Tomoleoni, Joseph; Van Houtan, Kyle S.

Publication Thumbnail
Year Published: 2021

Time-to-detection occupancy methods: Performance and utility for improving efficiency of surveys

Occupancy methods propelled the quantitative study of species distributions forward by separating the observation process, or the imperfect detectability of species, from the ecological processes of interest governing species distributions. Occupancy studies come at a cost, however: the collection of additional data to account for nondetections at...

Halstead, Brian J.; Rose, Jonathan P.; Kleeman, Patrick M.

Publication Thumbnail
Year Published: 2021

How to identify win–win interventions that benefit human health and conservation

To reach the Sustainable Development Goals, we may need to act on synergies between some targets while mediating trade-offs between other targets. But what, exactly, are synergies and trade-offs, and how are they related to other outcomes, such as ‘win–win’ solutions? Finding limited guidance in the existing literature, we developed an operational...

Hopkins, Skylar R.; Sokolow, Susanne H.; Buck, Julia C; De Leo, Giulio A.; Jones, Isabel J.; Kwong, Laura H; LeBoa, Christopher; Lund, Andrea J; MacDonald, Andrew J; Nova, Nicole; Olson, Sarah H; Peel, Alison J.; Wood, Chelsea L.; Lafferty, Kevin D.

Publication Thumbnail
Year Published: 2021

Artificial nightlight alters the predator-prey dynamics of an apex carnivore

Artificial nightlight is increasingly recognized as an important environmental disturbance that influences the habitats and fitness of numerous species. However, its effects on wide‐ranging vertebrates and their interactions remain unclear. Light pollution has the potential to amplify land‐use change, and as such, answering the question of how...

Beckmann, Jon P.; Ditmer, Mark A.; Stoner, David C.; Francis, Clinton D.; Barber, Jesse R.; Forester, James D.; Choate, David M.; Ironside, Kristen E.; Longshore, Kathleen; Hersey, Kent R.; Larson, Randy T.; McMillan, Brock R.; Olson, Daniel D.; Andreasen, Alyson M.; Beckmann, Jon P.; Holton, Brandon P.; Carter, Neil H.; Messmer, Terry A.

Publication Thumbnail
Year Published: 2021

Mercury exposure in mammalian mesopredators inhabiting a brackish marsh

Bioaccumulation of environmental contaminants in mammalian predators can serve as an indicator of ecosystem health. We examined mercury concentrations of raccoons (Procyon lotor; n = 37 individuals) and striped skunks (Mephitis mephitis; n = 87 individuals) in Suisun Marsh, California, a large brackish marsh that is characterized by...

Peterson, Sarah H.; Ackerman, Joshua T.; Hartman, C. Alex; Casazza, Michael L.; Feldheim, Cliff L.; Herzog, Mark P.