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
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Year Published: 2019

Thin-layer sediment addition to an existing salt marsh to combat sea-level rise and improve endangered species habitat in California, USA

Current tidal marsh elevations and their accretion rates are important predictors of vulnerability to sea-level rise. When tidal marshes are at risk, adaptation measures, such as sediment addition to increase elevations, can be implemented to prevent degradation and loss. In 2016, wildlife managers prescribed a thin-layer sediment addition of...

Thorne, Karen M.; Freeman, Chase; Rosencranz, Jordan A.; Ganju, Neil Kamal; Guntenspergen, Glenn R.

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Year Published: 2019

Spatially consistent high-resolution land surface temperature mosaics for thermophysical mapping of the Mojave Desert

Daytime and nighttime thermal infrared observations acquired by the ASTER and MODIS instruments onboard the NASA Terra spacecraft have produced a dataset that can be used to map thermophysical properties across large regions, which have implications on surface processes, thermal environments and habitat suitability for desert species. ASTER scenes...

Nowicki, Scott A; Inman, Rich; Esque, Todd C.; Nussear, Kenneth E.; Edwards, Christopher S.

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Year Published: 2019

Community-based conservation and recovery of native species on Monuriki Island, Fiji

The small uninhabited island of Monuriki (40.4 ha) in western Fiji is of national and international conservation concern for its several protected species. Exotic invasive species and a Category 5 cyclone have exacerbated conservation challenges. The cooperation of local, national, and international stakeholders continues to be crucial in...

Fisher, Robert N.; Niukula, Jone; Harlow, Peter S.; Rasalato, Sia; Chand, Ramesh; Thaman, Baravi; Seniloli, Elenoa; Vadada, Joeli; Cranwell, Steve; Brown, J. Jed; Lovich, Kim; Thomas-Moko, Nunia
Fisher, R. N., Niukula, J., Harlow, P., Rasalato, S., Chand, R., Thaman, B., ... & Lovich, K. (2019). Community-based conservation and recovery of native species on Monuriki Island, Fiji. Island invasives: scaling up to meet the challenge, (62), 552.

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Year Published: 2019

Operationalizing resilience and resistance concepts to address invasive grass-fire cycles

Plant invasions can affect fuel characteristics, fire behavior, and fire regimes resulting in invasive plant-fire cycles and alternative, self-perpetuating states that can be difficult, if not impossible, to reverse. Concepts related to general resilience to disturbance and resistance to invasive plants provide the basis for managing landscapes to...

Chambers, Jeanne C.; Brooks, Matthew L.; Germino, Matthew J.; Maestas, Jeremy D; Board, David I; Jones, Matthew O.; Allred, Brady W

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Year Published: 2019

Effect of amphibian chytrid fungus (Batrachochytrium dendrobatidis) on apparent survival of frogs and toads in the western USA

Despite increasing interest in determining the population-level effects of emerging infectious diseases on wildlife, estimating effects of disease on survival rates remains difficult. Even for a well-studied disease such as amphibian chytridiomycosis (caused by the fungus Batrachochytrium dendrobatidis [Bd]), there are few estimates of...

Russell, Robin E.; Halstead, Brian J.; Mosher, Brittany; Muths, Erin L.; Adams, Michael J.; Campbell Grant, Evan H.; Fisher, Robert N.; Kleeman, Patrick M.; Backlin, Adam R.; Pearl, Christopher; Honeycutt, R. Ken; Hossack, Blake R.

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Year Published: 2019

Habitat preference modulates trans-oceanic dispersal in a terrestrial vertebrate

The importance of long-distance dispersal (LDD) in shaping geographical distributions has been debated since the nineteenth century. In terrestrial vertebrates, LDD events across large water bodies are considered highly improbable, but organismal traits affecting dispersal capacity are generally not taken into account. Here, we focus on a recent...

Blom, Mozes P.K.; Matzke, Nicholas J; Bragg, Jason G; Arida, Evy; Austin, Christopher C; Backlin, Adam R.; Carretero, Miguel A; Fisher, Robert N.; Glaw, Frank; Hathaway, Stacie A.; Iskandar, Djoko T; McGuire, Jimmy A; Karin, Benjamin R; Reilly, Sean B; Rittmeyer, Eric N; Rocha, Sara; Sanchez, Mickael; Stubbs, Alexander L; Vences, Miguel; Moritz, Craig

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Year Published: 2019

Local niche differences predict genotype associations in sister taxa of desert tortoise

Aims To investigate spatial congruence between ecological niches and genotype in two allopatric species of desert tortoise that are species of conservation concern. Location Mojave and Sonoran Desert ecoregions; California, Nevada, Arizona, Utah, USA. Methods We compare ecological niches of Gopherus agassizii and Gopherus morafkai using species...

Inman, Rich; Fotheringham, A. Stewart; Franklin, Janet; Esque, Todd C.; Edwards, Taylor; Nussear, Kenneth E.

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Year Published: 2019

Ecological effects of fear: How spatiotemporal heterogeneity in predation risk influences mule deer access to forage in a sky‐island system

Forage availability and predation risk interact to affect habitat use of ungulates across many biomes. Within sky‐island habitats of the Mojave Desert, increased availability of diverse forage and cover may provide ungulates with unique opportunities to extend nutrient uptake and/or to mitigate predation risk. We addressed whether habitat use and...

Lowrey, Chris; Longshore, Kathleen; Choate, David M.; Nagol, Jyoteshwar R; Sexton, Joseph O.; Thompson, Daniel B.

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Year Published: 2019

San Francisco Bay triennial bird egg monitoring program for contaminants, California—2018

The Regional Monitoring Program for Water Quality in San Francisco Bay (RMP), administered by the San Francisco Estuary Institute, is a large-scale effort to monitor contaminant trends in water, sediment, fish, and birds throughout San Francisco Bay (San Francisco Estuary Institute, 2016). As part of the RMP and the U.S....

Ackerman, Joshua T.; Hartman, C. Alex; Herzog, Mark P.; Toney, Matthew
Ackerman, J.T., Hartman, C.A., Herzog, M.P., and Toney, M., 2019, San Francisco Bay triennial bird egg monitoring program for contaminants, California—2018: U.S. Geological Survey Data Series 1114, 14 p., https://doi.org/10.3133/ds1114.

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Year Published: 2019

Sea-cliff bedstraw (Galium buxifolium) patterns and trends, 2005–14, on Santa Cruz and San Miguel Islands, Channel Islands National Park, California

Sea-cliff bedstraw (Galium buxifolium [Rubiaceae]) is a delicate dioecious subshrub endemic to Santa Cruz and San Miguel Islands, in the northern California Channel Islands. It was listed as endangered in 1997 under the Federal Endangered Species Act, threatened by soil loss, habitat alteration, and herbivory from more than a century of ranching...

McEachern, Kathryn; Chess, Katherine A.; Flagg, Karen; Niessen, Kenneth G.
McEachern, K., Chess, K.A., Flagg, K., and Niessen, K.G., 2019, Sea-cliff bedstraw (Galium buxifolium) patterns and trends, 2005–14, on Santa Cruz and San Miguel Islands, Channel Islands National Park, California: U.S. Geological Survey Open-File Report 2019–1054, 23 p., https://doi.org/10.3133/ofr20191054.

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Year Published: 2019

Species insurance trumps spatial insurance in stabilizing biomass of a marine macroalgal metacommunity

Because natural ecosystems are complex, it is difficult to predict how their variability scales across space and levels of organization. The species‐insurance hypothesis predicts that asynchronous dynamics among species should reduce variability when biomass is aggregated either from local species populations to local multispecies communities, or...

Lamy, Thomas; Wang, Shaopeng; Renard, Delphine; Lafferty, Kevin D.; Reed, Daniel C.; Miller, Robert J.

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Year Published: 2019

Postfire population dynamics of a fire-dependent cypress

Tecate cypress (Hesperocyparis forbesii) is a rare species restricted to four metapopulations in southern California, USA and a few isolated stands in northern Baja California, Mexico. It is a closed-cone, fire-dependent tree of conservation concern due to an increase in human-caused wildfires that have shortened the interval between fires in many...

Brennan, Teresa J.; Keeley, Jon