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26 results on '"Brehme, Cheryl S."'

9. Responses of Small Terrestrial Vertebrates to Roads in Coastal Sage Scrub Ecosystem

Author

Brehme, Cheryl S.

Subjects
habitat, abundance, corridor, fragmentation, vertebrates, small mammals, lizards, reptiles
Abstract

I assessed the activity pattern of small mammals and lizards in relation to three types of roads transecting coastal sage scrub habitats. The bulk of data were generated for three small mammal species (Chaetodipus fallax, Peromyscus eremicus, and Peromyscus maniculatus) and two lizard species (Sceloporus occidentalis and Cnemidophorus hyperythrus). I characterized both relative abundance at two distances from each road and individual movement patterns in relation to each road in order to explore the effects of roads on species spatial and movement dynamics. The two habitat specialists exhibited decreased abundance next to different road types. The three habitat generalists either showed no difference or increased abundance by a road. These data generally support previous studies that suggest habitat specialists are more sensitive to edges. All species exhibited decreased permeability to improved roads. The unimproved dirt road did not impede movement, while the primary highway was a barrier for all species. Responses to the secondary paved road differed among species. I suggest that species with open microhabitat preferences are more likely to venture out onto unimproved dirt and secondary paved roads. Those that did venture out onto improved roads suffered increased mortality due to vehicular traffic.

Published
2003

11. Quantifying climate sensitivity and climate-driven change in North American amphibian communities

Author

Miller, David A. W., Grant, Evan H. Campbell, Muths, Erin, Amburgey, Staci M., Adams, Michael J., Joseph, Maxwell B., Waddle, J. Hardin, Johnson, Pieter T. J., Ryan, Maureen E., Schmidt, Benedikt R., Calhoun, Daniel L., Davis, Courtney L., Fisher, Robert N., Green, David M., Hossack, Blake R., Rittenhouse, Tracy A. G., Walls, Susan C., Bailey, Larissa L., Cruickshank, Sam S., Fellers, Gary M., Gorman, Thomas A., Haas, Carola A., Hughson, Ward, Pilliod, David S., Price, Steven J., Ray, Andrew M., Sadinski, Walt, Saenz, Daniel, Barichivich, William J., Brand, Adrianne, Brehme, Cheryl S., Dagit, Rosi, Delaney, Katy S., Glorioso, Brad M., Kats, Lee B., Kleeman, Patrick M., Pearl, Christopher A., Rochester, Carlton J., Riley, Seth P. D., Roth, Mark, and Sigafus, Brent H.

Published
2018
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14. Range‐wide persistence of the endangered arroyo toad ( Anaxyrus californicus ) for 20+ years following a prolonged drought

Author

Hitchcock, Cynthia J., primary, Gallegos, Elizabeth A., additional, Backlin, Adam R., additional, Barabe, Russell, additional, Bloom, Peter H., additional, Boss, Kimberly, additional, Brehme, Cheryl S., additional, Brown, Christopher W., additional, Clark, Denise R., additional, Clark, Elizabeth R., additional, Cooper, Kevin, additional, Donnell, Julie, additional, Ervin, Edward, additional, Famolaro, Peter, additional, Guilliam, Kim M., additional, Hancock, Jacquelyn J., additional, Hess, Nicholas, additional, Howard, Steven, additional, Hubbartt, Valerie, additional, Lieske, Patrick, additional, Lovich, Robert, additional, Matsuda, Tritia, additional, Meyer‐Wilkins, Katherin, additional, Muri, Kamarul, additional, Nerhus, Barry, additional, Nordland, Jeff, additional, Ortega, Brock, additional, Packard, Robert, additional, Ramirez, Ruben, additional, Stewart, Sam C., additional, Sweet, Samuel, additional, Warburton, Manna, additional, Wells, Jeffrey, additional, Winkleman, Ryan, additional, Winter, Kirsten, additional, Zitt, Brian, additional, and Fisher, Robert N., additional

Published
2022
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23. Quantifying climate sensitivity and climate-driven change in North American amphibian communities

Author

Fish and Wildlife Conservation, Miller, David A. W., Grant, Evan H. Campbell, Muths, Erin, Amburgey, Staci M., Adams, Michael J., Joseph, Maxwell B., Waddle, J. Hardin, Johnson, Pieter T. J., Ryan, Maureen E., Schmidt, Benedikt R., Calhoun, Daniel L., Davis, Courtney L., Fisher, Robert N., Green, David M., Hossack, Blake R., Rittenhouse, Tracy A. G., Walls, Susan C., Bailey, Larissa L., Cruickshank, Sam S., Fellers, Gary M., Gorman, Thomas A., Haas, Carola A., Hughson, Ward, Pilliod, David S., Price, Steven J., Ray, Andrew M., Sadinski, Walt, Saenz, Daniel, Barichivich, William J., Brand, Adrianne, Brehme, Cheryl S., Dagit, Rosi, Delaney, Katy S., Glorioso, Brad M., Kats, Lee B., Kleeman, Patrick M., Pearl, Christopher A., Rochester, Carlton J., Riley, Seth P. D., Roth, Mark, Sigafus, Brent H., Fish and Wildlife Conservation, Miller, David A. W., Grant, Evan H. Campbell, Muths, Erin, Amburgey, Staci M., Adams, Michael J., Joseph, Maxwell B., Waddle, J. Hardin, Johnson, Pieter T. J., Ryan, Maureen E., Schmidt, Benedikt R., Calhoun, Daniel L., Davis, Courtney L., Fisher, Robert N., Green, David M., Hossack, Blake R., Rittenhouse, Tracy A. G., Walls, Susan C., Bailey, Larissa L., Cruickshank, Sam S., Fellers, Gary M., Gorman, Thomas A., Haas, Carola A., Hughson, Ward, Pilliod, David S., Price, Steven J., Ray, Andrew M., Sadinski, Walt, Saenz, Daniel, Barichivich, William J., Brand, Adrianne, Brehme, Cheryl S., Dagit, Rosi, Delaney, Katy S., Glorioso, Brad M., Kats, Lee B., Kleeman, Patrick M., Pearl, Christopher A., Rochester, Carlton J., Riley, Seth P. D., Roth, Mark, and Sigafus, Brent H.

Abstract

Changing climate will impact species' ranges only when environmental variability directly impacts the demography of local populations. However, measurement of demographic responses to climate change has largely been limited to single species and locations. Here we show that amphibian communities are responsive to climatic variability, using >500,000 time-series observations for 81 species across 86 North American study areas. The effect of climate on local colonization and persistence probabilities varies among eco-regions and depends on local climate, species life-histories, and taxonomic classification. We found that local species richness is most sensitive to changes in water availability during breeding and changes in winter conditions. Based on the relationships we measure, recent changes in climate cannot explain why local species richness of North American amphibians has rapidly declined. However, changing climate does explain why some populations are declining faster than others. Our results provide important insights into how amphibians respond to climate and a general framework for measuring climate impacts on species richness.

Published
2018

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