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Filter Total Items: 30,796
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Year Published: 2018

burnr: Fire history analysis and graphics in R

We developed a new software package, burnr, for fire history analysis and plotting in the Rstatistical programming environment. It was developed for tree-ring fire-scar analysis, but is broadly applicable to other event analyses (e.g., avalanches, frost rings, or culturally modified trees). Our new package can read,...

Malevich, Steven B.; Guiterman, Christopher H.; Margolis, Ellis
S.B. Malevich.S.B., C.H. Guiterman, and E.Q. Margolis. 2018. burnr: Fire history analysis and graphics in R. Dendrochronologia 49:9-15.

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Year Published: 2018

Improving geographically extensive acoustic survey designs for modeling species occurrence with imperfect detection and misidentification

Acoustic recording units (ARUs) enable geographically extensive surveys of sensitive and elusive species. However, a hidden cost of using ARU data for modeling species occupancy is that prohibitive amounts of human verification may be required to correct species identifications made from automated software. Bat acoustic studies exemplify this...

Banner, Katharine M.; Irvine, Kathryn M.; Rodhouse, Thomas J.; Wright, Wilson J.; Rodriguez, Rogelio M.; Litt, Andrea R.
Banner, KM, Irvine, KM, Rodhouse, TJ, Wright, WJ, Rodriguez, RM, Litt, AR. 2018. Improving geographically extensive acoustic survey designs for modeling occurrence with imperfect detection and misidentification. Ecology and Evolution. 8:6144–6156.

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Year Published: 2018

Thamnophis sirtalis fitchi (Valley Gartersnake). Coloration.

During surveys for Thamnophis gigas (Giant Gartersnake), I observed an adult T. sirtalis fitchi with unusual coloration— a yellow-cream background color with some typical red coloration laterally, but with very minimal amounts of the dark slate-black (along the sides of the yellow dorsal stripe and on top of the head) that normally predominates in...

Fulton, Alexandria M.
Fulton, A. M. (2018, June). THAMNOPHIS SIRTALIS FITCHI (Valley Gartersnake). COLORATION. Natural History Notes. Herpetological Review 49(2). https://www.dropbox.com/s/5oaapit41txibn8/HerpRev_June_2018_Natural_History_Notes.pdf?dl=1

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Year Published: 2018

Flood effects on soil thermal regimes in contrasting cold‐desert river floodplains (Yampa and Green rivers, Colorado)

Heat transfer theory suggests that floodplain soils in dryland riverine ecosystems can be cooled by hyporheic flows generated during spring floods. I compared soil temperature cycles and associated hydrologic factors on a free‐flowing river to those on a river where flows and surface water temperatures are now regulated. Spring surface water...

Andersen, Douglas C.

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Year Published: 2018

A multi-species synthesis of satellite telemetry data in the Pacific Arctic (1987–2015): Overlap of marine mammal distributions and core use areas

We collated available satellite telemetry data for six species of ice-associated marine mammals in the Pacific Arctic: ringed seals (Pusa hispida; n = 118), bearded seals(Erignathus barbatus, n = 51), spotted seals (Phoca largha, n = 72), Pacific walruses (Odobenus rosmarus divergens, n = 389); bowhead whales (...

Citta, John J.; Lowry, Lloyd F.; Quakenbush, Lori T.; Kelly, Brendan P.; Fischbach, Anthony S.; London, Josh M.; Jay, Chadwick V.; Frost, Kathryn J.; Crowe, Gregory O'Corry; Crawford, Justin A.; Boveng, Peter L.; Cameron, Michael; Von Duyke, Andrew L.; Nelson, Mark; Harwood, Lois A.; Richard, Pierre; Suydam, Robert; Heide-Jørgensen, Mads Peter; Hobbs, Roderick C.; Litovka, Dennis I.; Marcoux, Marianne; Whiting, Alex; Kennedy, Amy S.; George, John C.; Orr, Jack; Gray, Tom

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Year Published: 2018

Wildland–urban interface residents’ relationships with wildfire: Variation within and across communities

Social science offers rich descriptions of relationships between wildland–urban interface residents and wildfire, but syntheses across different contexts might gloss over important differences. We investigate the potential extent of such differences using data collected consistently in sixty-eight Colorado communities and hierarchical modeling. We...

Meldrum, James R.; Brenkert-Smith, Hannah; Champ, Patricia A.; Falk, Lilia C.; Wilson, Pamela; Barth, Christopher M.

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Year Published: 2018

Chapter 4: Northern spotted owl habitat and populations: Status and threats

The northern spotted owl (Strix occidentalis caurina) was listed as threatened under the Endangered Species Act in 1990 (USFWS 1990). Providing adequate amounts of suitable forest cover to sustain the subspecies was a major component of the first recovery plan for northern spotted owls (USFWS 1992) and a driver in the basic reserve design and old-...

Lesmeister, Damon B.; Davis, Ramond J; Singleton, Peter H; Wiens, David
Lesmeister, D.B., Davis, R.J., Singleton, P.H., Wiens, J.D., 2018, Chapter 4. Northern Spotted Owl- Status of Populations and Habitats In Spies, T.A., Stine, P., Gravenmier, R., Long, J., Reilly, M., eds., Synthesis of Science to Inform Land Management within the Northwest Forest Plan Area: PNW-GTR-966 Vol. 1, Portland, OR, USDA Forest Service Pacific Northwest Research Station, 56 pp.

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Year Published: 2018

Critically assessing the utility of portable lead analyzers for wildlife conservation

Lead (Pb) exposure in wildlife is a widespread management and conservation concern. Quantitative determination of Pb concentrations in wildlife tissues is the foundation for estimating exposure and risk. Development of low‐cost, portable instruments has improved access and cost‐effectiveness of determining Pb concentrations in blood samples, while...

Herring, Garth; Eagles-Smith, Collin A.; Bedrosian, Bryan; Craighead, Derek; Domenech, Robert; Langner, Heiko W.; Parish, Chris N.; Shreading, Adam; Welch, Alacia; Wolstenholme, Rachel
Herring, G., Eagles-Smith, C.A., Bedrosian, B., Craighead, D., Domenech, R., Langner, H.W., Parish, C., Shreading, A., Welch, A., Wolstenholme, R., 2018, Critically assessing the utility of portable lead analyzers for wildlife conservation: Wildlife Society Bulletin, p. online, https://doi.org/10.1002/wsb.892.

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Year Published: 2018

Density and success of upland duck nests in native‐ and tame‐seeded conservation fields

The Conservation Reserve Program (CRP) generates substantial benefits to continental duck populations by providing grassland nesting habitat in rested cropland. Seeding mixes of CRP grasslands vary among numerous conservation practices, but one contrast of interest in the Prairie Pothole Region is the use of introduced, or “tame” versus native...

Sherfy, Mark H.; Anteau, Michael J.; Shaffer, Terry L.; Johnson, Michael A.; Reynolds, Ronald E.; Ringelman, James K.

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Year Published: 2018

Ecological resilience indicators for mangrove ecosystems

Mangrove ecosystems are coastal wetland ecosystems dominated by mangrove species that are typically found in the intertidal zone, characterized by frequently flooded saline soil conditions. The majority of the approximately 500,000 acres of mangrove ecosystem in the United States occurs in the NGoM, and almost all of that is in Florida, with over...

Day, Richard H.; Allen, Scott T.; Brenner, Jorge; Goodin, Kathleen; Faber-Langendoen, Don; Ames, Katherine Wirt
Day, R.H., Allen, S.T., Brenner, J., Goodin, K.L., Faber-Langdoen, D., and Ames, K.W., 2018, Ecological resilience indicators for mangrove ecosystems, in Goodin, K.L., ed., Ecological Resilience Indicators for Five Northern Gulf of Mexico Ecosystems, Chapter 3, p. 91-150: NatureServe, Arlington, VA, http://www.natureserve.org/sites/default/files/projects/files/chapter_3_-_mangrove_indicators.pdf.

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Year Published: 2018

Ecological resilience indicators for salt marsh ecosystems

Salt marshes are coastal ecosystems within the intertidal zone, characterized by hypoxic, saline, soil conditions and low biodiversity. Low diversity arises from frequent disturbance and stressful conditions (i.e., high salinity and hypoxia), where vegetative reproduction and low competition result in mostly monotypic stands, with some differences...

Allen, Scott T.; Stagg, Camille L.; Brenner, Jorge; Goodin, Kathleen L.; Faber-Langendoen, Don; Gabler, Christopher A.; Ames, Katherine Wirt
Allen, S.T., Stagg, C.L., Brenner, J., Goodin, K.L., Faber-Langendoen, D., Gabler, C.A., and Ames, K.W., 2018, Ecological resilience indicators for salt marsh ecosystems, in Goodin, K.L., ed., Ecological Resilience Indicators for Five Northern Gulf of Mexico Ecosystems, Chapter 2, p. 37-89: NatureServe, Arlington, VA, http://www.natureserve.org/sites/default/files/projects/files/chapter_2_-_salt_marsh_indicators.pdf.