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: 3,061
Publication Thumbnail
Year Published: 2018

Rising tides: Assessing habitat vulnerability for an endangered salt marsh-dependent species with sea-level rise

Salt marsh-dependent species are vulnerable to impacts of sea-level rise (SLR). Site-specific differences in ecogeomorphic processes result in different SLR vulnerabilities. SLR impacts to Ridgway’s rail (Rallus obsoletus) of Southern California (SC) and San Francisco Bay (SF), U.S.A. could foreshadow SLR effects on other coastal endemic species....

Rosencranz, Jordan A.; Thorne, Karen M.; Buffington, Kevin J.; Overton, Cory T.; Takekawa, John; Casazza, Michael L.; McBroom, Jennifer; Wood, Julian K.; Nur, Nadav; Zembal, Richard L.; MacDonald, Glen M.; Ambrose, Richard F.

Publication Thumbnail
Year Published: 2018

Historical patterns of wildfire ignition sources in California ecosystems

State and federal agencies have reported fire causes since the early 1900s, explicitly for the purpose of helping land managers design fire-prevention programs. We document fire-ignition patterns in five homogenous climate divisions in California over the past 98 years on state Cal Fire protected lands and 107 years on federal United States Forest...

Keeley, Jon E.; Syphard, Alexandra D.

Publication Thumbnail
Year Published: 2018

The Introduced Argentine ant (Linepithema humile) on the California Channel Islands: Distribution and Patterns of Spread

The Argentine ant (Linepithema humile) is a widespread and abundant introduced species that disrupts ecosystems throughout its introduced range. This invader was inadvertently introduced to Santa Catalina, San Clemente, Santa Cruz, and San Nicolas Islands at various points during the past century but currently appears to be absent from the...

Boser, Christina L.; Merrell, Korie; Fisher, Robert N.; Naughton, Ida; Holway, David A

Publication Thumbnail
Year Published: 2018

Thamnophis gigas (Giant Gartersnake). Diet.

No abstract available.

Fulton, Alexandria M.; Muñoz, Diana

Publication Thumbnail
Year Published: 2018

Population genomic surveys for six rare plant species in San Diego County, California

San Diego County is a hotspot of biodiversity, situated at the intersection of the Baja peninsula, the California floristic province, and the desert southwest. This hotspot is characterized by a high number of rare and endemic species, which persist alongside a major urban epicenter. San Diego County has implemented a strategic management plan...

Milano, Elizabeth R.; Vandergast, Amy G.
Milano, E.R., and Vandergast, A.G., 2018, Population genomic surveys for six rare plant species in San Diego County, California: U.S. Geological Survey Open-File Report 2018–1175, 60 p., https://doi.org/10.3133/ofr20181175.

Publication Thumbnail
Year Published: 2018

Multi-scale effects of land cover and urbanization on the habitat suitability of an endangered toad

Habitat degradation, entwined with land cover change, is a major driver of biodiversity loss. Effects of land cover change on species can be direct (when habitat is converted to alternative land cover types) or indirect (when land outside of the species habitat is altered). Hydrologic and ecological connections between terrestrial and...

Treglia, Michael L.; Landon, Adam C; Fisher, Robert N.; Kyle, Gerard; Fitzgerald, Lee A.
Treglia, M. L., Landon, A. C., Fisher, R. N., Kyle, G., & Fitzgerald, L. A. (2018). Multi-scale effects of land cover and urbanization on the habitat suitability of an endangered toad. Biological Conservation, 228, 310-318.

Publication Thumbnail
Year Published: 2018

California mallards: a review

Mallards (Anas platyrhynchos) are the most abundant breeding waterfowl species in California and are important to waterfowl hunters in the state. California is unique among major North American wintering waterfowl areas, in that most mallards harvested in California are also produced in California, meaning that California must provide both high...

Feldheim, Cliff L.; Ackerman, Joshua T.; Oldenburger, Shaun L.; Eadie, John M.; Fleskes, Joseph P.; Yarris, Gregory S.
Feldheim, C. L., Ackerman, J. T., Oldenburger, S. L., Eadie, J. M., Fleskes, J. P., & Yarris, G. S. (2018). California mallards: a review. California Fish and Game, 104(2), 49-66.

Publication Thumbnail
Year Published: 2018

Gaps in kelp cover may threaten the recovery of California sea otters

Despite more than a century of federal protection, the California sea otter Enhydra lutris nereis remains threatened under the U.S. Endangered Species Act (ESA), and the population has not appreciably expanded its range in two decades. Here, we examine a novel dataset of 725 sea otter live strandings from 1984–2015 to gain insights into...

Nicholson, Teri E.; Mayer, Karl A.; Staedler, Michelle M.; Fujii, Jessica A.; Murray, Michael J.; Johnson, Andrew B.; Tinker, M. Tim; Van Houtan, Kyle S.

Publication Thumbnail
Year Published: 2018

Identifying management-relevant research priorities for responding to disease-associated amphibian declines

A research priority can be defined as a knowledge gap that, if resolved, identifies the optimal course of conservation action. We (a group of geographically distributed and multidisciplinary research scientists) used tools from nominal group theory and decision analysis to collaboratively identify and prioritize information...

Campbell Grant, Evan H.; Adams, M.J.; Fisher, Robert N.; Grear, Daniel A.; Halstead, Brian J.; Hossack, Blake R.; Muths, Erin L.; Richgels, Katherine L. D.; Russell, Robin E.; Smalling, Kelly L.; Waddle, J. Hardin; Walls, Susan C.; White, C. LeAnn
Grant, E. H. C., Adams, M. J., Fisher, R. N., Grear, D. A., Halstead, B. J., Hossack, B. R., Muths, E., Richgels, K. L. D., Russell, R. E., Smalling, K. L., Waddle, J. H., Walls, S. C., and White, C. L., 2018, Identifying management-relevant research priorities for responding to disease-associated amphibian declines: Global Ecology and Conservation, v. 16, article e00441, 9 p. https://doi.org/10.1016/j.gecco.2018.e00441

Publication Thumbnail
Year Published: 2018

Modeling resource selection of bobcats (Lynx rufus) and vertebrate species distributions in Orange County, southern California

For nature reserves in urban settings, wildlife and wildlife habitats may be affected by recreational activities and intensive, adjacent development. Sustaining biodiversity in such reserves is a challenge for land and natural resource managers, but identification of core areas and key resources for wildlife species may help in planning for...

Boydston, Erin E.; Tracey, Jeff A.
Boydston, E.E., and Tracey, J.A., 2018, Modeling resource selection of bobcats (Lynx rufus) and vertebrate species distributions in Orange County, southern California, with a section on Modeling for reptile, amphibian, and bird distributions by Tracey, J.A., Preston, K.L., Rochester, C.J., Boydston, E.E., and Fisher, R.N.: U.S. Geological Survey Open-File Report 2018–1095, 65 p., https://doi.org/10.3133/ofr20181095.

Publication Thumbnail
Year Published: 2018

Spatial decision‐support tools to guide restoration and seed‐sourcing in the Desert Southwest

Altered disturbance regimes and shifting climates have increased the need for large‐scale restoration treatments across the western United States. Seed‐sourcing remains a considerable challenge for revegetation efforts, particularly on public lands where policy favors the use of native, locally sourced plant material to avoid maladaptation. An...

Shryock, Daniel F.; DeFalco, Lesley A.; Esque, Todd C.
Shryock, D. F., L. A. DeFalco, and T. C. Esque. 2018. Spatial decision‐support tools to guide restoration and seed‐sourcing in the Desert Southwest. Ecosphere 9(10):e02453. 10.1002/ecs2.2453

Publication Thumbnail
Year Published: 2018

California Gull population growth and ecological impacts in the San Francisco Bay estuary, 1980–2016

The breeding population of California Gulls (Larus californicus) in the San Francisco Bay estuary increased from 24 individuals in 1980 to a peak of over 53,000 in 2014, then declined to 38,040 in 2016. The expansion of the breeding population may be related to the availability of suitable nesting sites in close proximity to anthropogenic food...

Burns, Catherine E.; Ackerman, Joshua T.; Washburn, Natalie B.; Bluso-Demers, Jill; Robinson-Nilsen, Caitlin; Strong, Cheryl