Leila Gass (Former Employee)
Science and Products
Filter Total Items: 21
Thematic accuracy assessment of the 2011 National Land Cover Database (NLCD) Thematic accuracy assessment of the 2011 National Land Cover Database (NLCD)
Accuracy assessment is a standard protocol of National Land Cover Database (NLCD) mapping. Here we report agreement statistics between map and reference labels for NLCD 2011, which includes land cover for ca. 2001, ca. 2006, and ca. 2011. The two main objectives were assessment of agreement between map and reference labels for the three, single-date NLCD land cover products at Level II...
Authors
James Wickham, Stephen V. Stehman, Leila Gass, Jon Dewitz, Daniel G. Sorenson, Brian J. Granneman, Richard V. Poss, Lori Anne Baer
Comparison of remote sensing indices for monitoring of desert cienegas Comparison of remote sensing indices for monitoring of desert cienegas
This research considers the applicability of different vegetation indices at 30 m resolution for mapping and monitoring desert wetland (cienega) health and spatial extent through time at Cienega Creek in southeastern Arizona, USA. Multiple stressors including the risk of decadal-scale drought, the effects of current and predicted global warming, and continued anthropogenic pressures...
Authors
Natalie R. Wilson, Laura M. Norman, Miguel L. Villarreal, Leila Gass, Ron Tiller, Andrew Salywon
Potash: a global overview of evaporate-related potash resources, including spatial databases of deposits, occurrences, and permissive tracts Potash: a global overview of evaporate-related potash resources, including spatial databases of deposits, occurrences, and permissive tracts
Potash is mined worldwide to provide potassium, an essential nutrient for food crops. Evaporite-hosted potash deposits are the largest source of salts that contain potassium in water-soluble form, including potassium chloride, potassium-magnesium chloride, potassium sulfate, and potassium nitrate. Thick sections of evaporitic salt that form laterally continuous strata in sedimentary...
Authors
Greta J. Orris, Mark D. Cocker, Pamela Dunlap, Jeff C. Wynn, Gregory T. Spanski, Deborah A. Briggs, Leila Gass, James D. Bliss, Karen S. Bolm, Chao Yang, Bruce R. Lipin, Stephen Ludington, Robert J. Miller, Miroslaw Slowakiewicz
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Groundwater and Streamflow Information Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Energy & Minerals Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Remote sensing analysis of riparian vegetation response to desert marsh restoration in the Mexican Highlands Remote sensing analysis of riparian vegetation response to desert marsh restoration in the Mexican Highlands
Desert marshes, or cienegas, are extremely biodiverse habitats imperiled by anthropogenic demands for water and changing climates. Given their widespread loss and increased recognition, remarkably little is known about restoration techniques. In this study, we examine the effects of gabions (wire baskets filled with rocks used as dams) on vegetation in the Cienega San Bernardino, in the...
Authors
Laura M. Norman, Miguel L. Villarreal, H. Ronald Pulliam, Robert L. Minckley, Leila Gass, Cindy Tolle, Michelle Coe
Accuracy assessment of NLCD 2006 land cover and impervious surface Accuracy assessment of NLCD 2006 land cover and impervious surface
Release of NLCD 2006 provides the first wall-to-wall land-cover change database for the conterminous United States from Landsat Thematic Mapper (TM) data. Accuracy assessment of NLCD 2006 focused on four primary products: 2001 land cover, 2006 land cover, land-cover change between 2001 and 2006, and impervious surface change between 2001 and 2006. The accuracy assessment was conducted by...
Authors
James D. Wickham, Stephen V. Stehman, Leila Gass, Jon Dewitz, Joyce A. Fry, Timothy G. Wade
Chihuahuan Deserts Ecoregion: Chapter 27 in Status and trends of land change in the Western United States--1973 to 2000 Chihuahuan Deserts Ecoregion: Chapter 27 in Status and trends of land change in the Western United States--1973 to 2000
The Chihuahuan Desert is the largest of the North American deserts, extending from southern New Mexico and Texas deep into Mexico, with approximately 90 percent of its area falling south of the United States–Mexico border (Lowe, 1964, p. 24). The Chihuahuan Deserts Ecoregion covers approximately 174,472 km2 (67,364 mi2) within the United States, including much of west Texas, southern New...
Authors
Jana Ruhlman, Leila Gass, Barry Middleton
Non-USGS Publications**
Higgins, L.V. and L. Gass. 1993. Birth to weaning: parturition, duration of lactation, and attendance cycles of Australian sea lions (Neophoca cinerea). Canadian Journal of Zoology 71(10):2047-2055.
Morris, M.R., L. Gass, and M.J. Ryan. 1995. Assessment and individual recognition of opponents in the pygmy swordtails Xiphophorus nigrensis and X. multilineatus. Behavioral Ecology and Sociobiology 37:303-310.
Gass, L. 1996. Nesting behavior of Golden-cheeked Warblers in Travis County, Texas. MA thesis, Southwest Texas State University.
Gass, L. and P.W. Barnes. 1998. Microclimate and understory structure of live oak (Quercus fusiformis) clusters in central Texas, USA. Southwestern Naturalist 43: 183-194.
Ladd, C. and L. Gass. 1999. Golden-cheeked Warbler (Dendroica chrysoparia). In The Birds of North America (A. Poole and F. Gill, Eds.). The Academy of Natural Sciences, Philadelphia, and The American Ornithologists’ Union, Washington, D.C.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 21
Thematic accuracy assessment of the 2011 National Land Cover Database (NLCD) Thematic accuracy assessment of the 2011 National Land Cover Database (NLCD)
Accuracy assessment is a standard protocol of National Land Cover Database (NLCD) mapping. Here we report agreement statistics between map and reference labels for NLCD 2011, which includes land cover for ca. 2001, ca. 2006, and ca. 2011. The two main objectives were assessment of agreement between map and reference labels for the three, single-date NLCD land cover products at Level II...
Authors
James Wickham, Stephen V. Stehman, Leila Gass, Jon Dewitz, Daniel G. Sorenson, Brian J. Granneman, Richard V. Poss, Lori Anne Baer
Comparison of remote sensing indices for monitoring of desert cienegas Comparison of remote sensing indices for monitoring of desert cienegas
This research considers the applicability of different vegetation indices at 30 m resolution for mapping and monitoring desert wetland (cienega) health and spatial extent through time at Cienega Creek in southeastern Arizona, USA. Multiple stressors including the risk of decadal-scale drought, the effects of current and predicted global warming, and continued anthropogenic pressures...
Authors
Natalie R. Wilson, Laura M. Norman, Miguel L. Villarreal, Leila Gass, Ron Tiller, Andrew Salywon
Potash: a global overview of evaporate-related potash resources, including spatial databases of deposits, occurrences, and permissive tracts Potash: a global overview of evaporate-related potash resources, including spatial databases of deposits, occurrences, and permissive tracts
Potash is mined worldwide to provide potassium, an essential nutrient for food crops. Evaporite-hosted potash deposits are the largest source of salts that contain potassium in water-soluble form, including potassium chloride, potassium-magnesium chloride, potassium sulfate, and potassium nitrate. Thick sections of evaporitic salt that form laterally continuous strata in sedimentary...
Authors
Greta J. Orris, Mark D. Cocker, Pamela Dunlap, Jeff C. Wynn, Gregory T. Spanski, Deborah A. Briggs, Leila Gass, James D. Bliss, Karen S. Bolm, Chao Yang, Bruce R. Lipin, Stephen Ludington, Robert J. Miller, Miroslaw Slowakiewicz
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Groundwater and Streamflow Information Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Energy & Minerals Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Remote sensing analysis of riparian vegetation response to desert marsh restoration in the Mexican Highlands Remote sensing analysis of riparian vegetation response to desert marsh restoration in the Mexican Highlands
Desert marshes, or cienegas, are extremely biodiverse habitats imperiled by anthropogenic demands for water and changing climates. Given their widespread loss and increased recognition, remarkably little is known about restoration techniques. In this study, we examine the effects of gabions (wire baskets filled with rocks used as dams) on vegetation in the Cienega San Bernardino, in the...
Authors
Laura M. Norman, Miguel L. Villarreal, H. Ronald Pulliam, Robert L. Minckley, Leila Gass, Cindy Tolle, Michelle Coe
Accuracy assessment of NLCD 2006 land cover and impervious surface Accuracy assessment of NLCD 2006 land cover and impervious surface
Release of NLCD 2006 provides the first wall-to-wall land-cover change database for the conterminous United States from Landsat Thematic Mapper (TM) data. Accuracy assessment of NLCD 2006 focused on four primary products: 2001 land cover, 2006 land cover, land-cover change between 2001 and 2006, and impervious surface change between 2001 and 2006. The accuracy assessment was conducted by...
Authors
James D. Wickham, Stephen V. Stehman, Leila Gass, Jon Dewitz, Joyce A. Fry, Timothy G. Wade
Chihuahuan Deserts Ecoregion: Chapter 27 in Status and trends of land change in the Western United States--1973 to 2000 Chihuahuan Deserts Ecoregion: Chapter 27 in Status and trends of land change in the Western United States--1973 to 2000
The Chihuahuan Desert is the largest of the North American deserts, extending from southern New Mexico and Texas deep into Mexico, with approximately 90 percent of its area falling south of the United States–Mexico border (Lowe, 1964, p. 24). The Chihuahuan Deserts Ecoregion covers approximately 174,472 km2 (67,364 mi2) within the United States, including much of west Texas, southern New...
Authors
Jana Ruhlman, Leila Gass, Barry Middleton
Non-USGS Publications**
Higgins, L.V. and L. Gass. 1993. Birth to weaning: parturition, duration of lactation, and attendance cycles of Australian sea lions (Neophoca cinerea). Canadian Journal of Zoology 71(10):2047-2055.
Morris, M.R., L. Gass, and M.J. Ryan. 1995. Assessment and individual recognition of opponents in the pygmy swordtails Xiphophorus nigrensis and X. multilineatus. Behavioral Ecology and Sociobiology 37:303-310.
Gass, L. 1996. Nesting behavior of Golden-cheeked Warblers in Travis County, Texas. MA thesis, Southwest Texas State University.
Gass, L. and P.W. Barnes. 1998. Microclimate and understory structure of live oak (Quercus fusiformis) clusters in central Texas, USA. Southwestern Naturalist 43: 183-194.
Ladd, C. and L. Gass. 1999. Golden-cheeked Warbler (Dendroica chrysoparia). In The Birds of North America (A. Poole and F. Gill, Eds.). The Academy of Natural Sciences, Philadelphia, and The American Ornithologists’ Union, Washington, D.C.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.