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: 3,126
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Year Published: 2019

Precision mapping of snail habitat provides a powerful indicator of human schistosomiasis transmission

Recently, the World Health Organization recognized that efforts to interrupt schistosomiasis transmission through mass drug administration have been ineffective in some regions; one of their new recommended strategies for global schistosomiasis control emphasizes targeting the freshwater snails that transmit schistosome parasites. We sought to...

Wood, Chelsea L.; Sokolow, Susanne H.; Jones, Isabel J.; Chamberlin, Andrew J; Lafferty, Kevin D.; Kuris, Armand M.; Jocque, Merlijn M. T.; Hopkins, Skylar R.; Adams, Grant; Buck, Julia C; Lund, Andrea J; Garcia-Vedrenne, Ana E; Fiorenza, Evan; Rohr, Jason R.; Allan, Fiona; Webster, Bonnie; Rabone, Muriel; Webster, Joanne P; Bandagny, Lydie; Ndione, Raphaël; Senghor, Simon; Schacht, Anne-Marie; Jouanard, Nicolas; Riveau, Gilles; De Leo, Giulio A.

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Year Published: 2019

Track tube construction and field protocol for small mammal surveys with emphasis on the endangered Pacific pocket mouse (Perognathus longimembris pacificus)

Track tubes are used to identify small animals by their tracks. Animals that are small enough to fit into the tubes walk over ink pads and onto cardstock paper to obtain bait within the tube, leaving their footprints. The tracking tubes described in this document are designed to be set on the ground with free access and exit at either end with...

Brehme, Cheryl S.; Matsuda, Tritia A.; Adsit-Morris, Devin T.; Clark, Denise R.; Sebes, Jeremy B.; Burlaza, Melanie Anne T.; Fisher, Robert N.
Brehme, C.S., Matsuda, T.A., Adsit-Morris, D.T., Clark, D.R., Burlaza, M.A.T., Sebes, J.B., and Fisher, R.N., 2019, Track tube construction and field protocol for small mammal surveys with emphasis on the endangered Pacific pocket mouse (Perognathus longimembris pacificus): U.S. Geological Survey Techniques and Methods, book 2, chap. A15, 18 p., plus appendix, https://doi.org/10.3133/tm2A15.

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Year Published: 2019

Challenges for monitoring the extent and land use/cover changes in monarch butterflies’ migratory habitat across the United States and Mexico

This paper presents a synopsis of the challenges and limitations presented by existing and emerging land use/ land cover (LULC) digital data sets when used to analyze the extent, habitat quality, and LULC changes of the monarch (Danaus plexippus) migratory habitat across the United States of America (US) and Mexico. First, the characteristics,...

Rafael Moreno-Sanchez; James Raines; Diffendorfer, James E.; Drummond, Mark A.; Jessica Manko

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Year Published: 2019

Sampling across 20 years (1996–2017) reveals loss of diversity and genetic connectivity in the Coachella Valley fringe-toed lizard (Uma inornata)

The Coachella Valley fringe-toed lizard (Uma inornata) is a federally threatened, aeolian sand dune obligate, endemic to the Coachella Valley, California. Historically, U. inornata is thought to have formed a large interconnected metapopulation across the valley, with local dune habitat and population size fluctuations linked to...

Vandergast, Amy G.; Wood, Dustin A.; Fisher, Mark; Barrows, Cameron W.; Mitelberg, Anna; Smith, Julia G.
Vandergast, A.G., Wood, D.A., Fisher, M., Barrows, C., Mitelberg, A., and Smith, J.G., 2019, Sampling across 20 years (1996–2017) reveals loss of diversity and genetic connectivity in the Coachella Valley fringe-toed lizard (Uma inornata): U.S. Geological Survey Open-File Report 2019–1105, 20 p., https://doi.org/10.3133/ofr20191105.

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Year Published: 2019

Physiological and gene transcription assays to assess responses of mussels to environmental changes

Coastal regions worldwide face increasing management concerns due to natural and anthropogenic forces that have the potential to significantly degrade nearshore marine resources. The goal of our study was to develop and test a monitoring strategy for nearshore marine ecosystems in remote areas that are not readily accessible for sampling. Mussel...

Counihan, Katrina; Bowen, Lizabeth; Ballachey, Brenda; Coletti, Heather A.; Hollman, Tuula; Pister, Benjamin; Wilson, Tammy L

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Year Published: 2019

Estimating sightability of greater sage-grouse at leks using an aerial infrared system and N-mixture models

Counts of grouse present at leks (breeding grounds) during spring are widely used to monitor population numbers and assess trends. However, only a proportion of birds available to count are detected resulting in a biased population index. We designed a study using an aerial integrated infrared imaging system (AIRIS) and experimental pseudo-leks to...

Coates, Peter S.; Wann, Gregory T.; Gillette, Gifford L.; Ricca, Mark A.; Prochazka, Brian G.; Severson, John P.; Andrle, Katie M.; Espinosa, Shawn P.; Casazza, Michael L.; Delehanty, David J.

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Year Published: 2019

Designing multi-scale hierarchical monitoring frameworks for wildlife to support management: A sage-grouse case study

Population monitoring is integral to the conservation and management of wildlife; yet, analyses of population demographic data rarely consider processes occurring across spatial scales, potentially limiting the effectiveness of adaptive management. Therefore, we developed a method to identify hierarchical levels of organization (i.e., populations...

O'Donnell, Michael S.; Edmunds, David R.; Aldridge, Cameron L.; Heinrichs, Julie; Coates, Peter S.; Prochazka, Brian G.; Hanser, Steven E.

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Year Published: 2019

California sea otter (Enhydra lutris nereis) census results, spring 2019

The 2019 census of southern sea otters (Enhydra lutris nereis), also known as California sea otters, was conducted from early May to early July along the mainland coast of central California and in April at San Nicolas Island in southern California. The range-wide index, defined as the 3-year average of combined counts from the mainland range and...

Hatfield, Brian B.; Yee, Julie L.; Kenner, Michael C.; Tomoleoni, Joseph A.
Hatfield, B.B., Yee, J.L., Kenner, M.C., and Tomoleoni, J.A., 2019, California sea otter (Enhydra lutris nereis) census results, spring 2019: U.S. Geological Survey Data Series 1118, 12 p., https://doi.org/10.3133/ds1118.

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Year Published: 2019

Moving at the speed of flight: Dabbling duck-movement rates and the relationship with electronic tracking interval

Context. Effective wildlife management requires information on habitat and resource needs, which can be estimated with movement information and modelling energetics. One necessary component of avian models is flight speeds at multiple temporal scales. Technology has limited the ability to accurately assess flight speeds, leading to estimates of...

McDuie, Fiona; Casazza, Michael L.; Keiter, David A.; Overton, Cory T.; Herzog, Mark P.; Feldheim, Cliff L.; Ackerman, Joshua T.

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Year Published: 2019

Giant sequoias: Drama on a grand scale

No abstract available.

Stephenson, Nathan L.
Stephenson, N. 2019. . Pages 47-49 in R. Hirsch, The Nature of Yosemite: A Visual Journey. Yosemite Association, Yosemite National Park, California. [Fine arts photography book with educational text.]

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Year Published: 2019

Factors associated with structure loss in the 2013–2018 California wildfires

Tens of thousands of structures and hundreds of human lives have been lost in recent fire events throughout California. Given the potential for these types of wildfires to continue, the need to understand why and how structures are being destroyed has taken on a new level of urgency. We compiled and analyzed an extensive dataset of building...

Syphard, Alexandra D.; Keeley, Jon

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Year Published: 2019

Global positioning system tracking devices can decrease Greater Sage-Grouse survival

Reliable demographic estimates hinge on the assumption that marking animals does not alter their behavior, reproduction, or survival. Violations can bias inference and are especially egregious for species of high conservation concern. Global positioning system (GPS) devices represent a recent technological advancement that has contributed greatly...

Severson, John P.; Coates, Peter S.; Prochazka, Brian G.; Ricca, Mark A.; Casazza, Michael L.; Delahunty, David J