Sue Phillips (Former Employee)
Science and Products
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Filter Total Items: 32
The influence of stream channels on distributions of Larrea tridentata and Ambrosia dumosa in the Mojave Desert, CA, USA: Patterns, mechanisms and effects of stream redistribution The influence of stream channels on distributions of Larrea tridentata and Ambrosia dumosa in the Mojave Desert, CA, USA: Patterns, mechanisms and effects of stream redistribution
Drainage channels are among the most conspicuous surficial features of deserts, but little quantitative analysis of their influence on plant distributions is available. We analysed the effects of desert stream channels (‘washes’) on Larrea tridentata and Ambrosia dumosa density and cover on an alluvial piedmont in the Mojave Desert, based on a spatial analysis of transect data...
Authors
S. Schwinning, D.R. Sandquist, D. M. Miller, D. R. Bedford, S. L. Phillips, J. Belnap
Sediment losses and gains across a gradient of livestock grazing and plant invasion in a cool, semi-arid grassland, Colorado Plateau, USA Sediment losses and gains across a gradient of livestock grazing and plant invasion in a cool, semi-arid grassland, Colorado Plateau, USA
Large sediment fluxes can have significant impacts on ecosystems. We measured incoming and outgoing sediment across a gradient of soil disturbance (livestock grazing, plowing) and annual plant invasion for 9 years. Our sites included two currently ungrazed sites: one never grazed by livestock and dominated by perennial grasses/well-developed biocrusts and one not grazed since 1974 and...
Authors
Jayne Belnap, Richard L. Reynolds, Marith C. Reheis, Susan L. Phillips, Frank Urban, Harland L. Goldstein
Global change and biological soil crusts: Effects of ultraviolet augmentation under altered precipitation regimes and nitrogen additions Global change and biological soil crusts: Effects of ultraviolet augmentation under altered precipitation regimes and nitrogen additions
Biological soil crusts (BSCs), a consortium of cyanobacteria, lichens, and mosses, are essential in most dryland ecosystems. As these organisms are relatively immobile and occur on the soil surface, they are exposed to high levels of ultraviolet (UV) radiation and atmospheric nitrogen (N) deposition, rising temperatures, and alterations in precipitation patterns. In this study, we...
Authors
J. Belnap, S. L. Phillips, S. Flint, J. Money, M. Caldwell
Visually assessing the level of development and soil surface stability of cyanobacterially dominated biological soil crusts Visually assessing the level of development and soil surface stability of cyanobacterially dominated biological soil crusts
Biological soil crusts (BSCs) are an integral part of dryland ecosystems and often included in long-term ecological monitoring programs. Estimating moss and lichen cover is fairly easy and non-destructive, but documenting cyanobacterial level of development (LOD) is more difficult. It requires sample collection for laboratory analysis, which causes soil surface disturbance. Assessing...
Authors
J. Belnap, S. L. Phillips, D.L. Witwicki, M. E. Miller
Wind erodibility of soils at Fort Irwin, California (Mojave Desert), USA, before and after trampling disturbance: Implications for land management Wind erodibility of soils at Fort Irwin, California (Mojave Desert), USA, before and after trampling disturbance: Implications for land management
Recently disturbed and 'control' (i.e. less recently disturbed) soils in the Mojave Desert were compared for their vulnerability to wind erosion, using a wind tunnel, before and after being experimentally trampled. Before trampling, control sites had greater cyanobacterial biomass, soil surface stability, threshold friction velocities (TFV, i.e. the wind speed required to move soil...
Authors
J. Belnap, S. L. Phillips, J. E. Herrick, J.R. Johansen
Dynamics of cover, UV-protective pigments, and quantum yield in biological soil crust communities of an undisturbed Mojave Desert shrubland Dynamics of cover, UV-protective pigments, and quantum yield in biological soil crust communities of an undisturbed Mojave Desert shrubland
Biological soil crusts are an integral part of dryland ecosystems. We monitored the cover of lichens and mosses, cyanobacterial biomass, concentrations of UV-protective pigments in both free-living and lichenized cyanobacteria, and quantum yield in the soil lichen species Collema in an undisturbed Mojave Desert shrubland. During our sampling time, the site received historically high and...
Authors
Jayne Belnap, Susan L. Phillips, Stanley D. Smith
Non-USGS Publications**
Brooks, J.R., Buchmann, N., Phillips, S.L., Ehleringer, B., Evans, R.D., Lott, M., Martinelli, L.A., Pockman, W.T., Sandquist, D.R., Sparks, J.P., Sperry, L., Williams, D., Ehleringer, J.R., 2002, Heavy and light beer- A carbon isotope approach to detect C4 carbon in beers of different origins, styles, and prices: Journal of Agricultural and Food Chemistry, v. 50, p. 6413-6418.
Ehleringer, J.R., Phillips, S.L., 1996, Ecophysiological factors contributing to the distributions of several Quercusspecies in the Intermountain West: Annales des Sciences Forestieres, v. 53, p. 291-302.
Ehleringer JR, Sandquist DR, Phillips SL. 1997. Burning coal seams in southern Utah: a natural system for studies of plant responses to elevated CO2. In: A. Raschi, F. Migleietta, R. Tugnetti and P. van Gardingen (eds), Plant Responses to Elevated CO2: Evidence from Natural Springs. Cambridge Univ Press. pp 56-68.
Ehleringer JR, Phillips SL. 1996. Ecophysiological factors contributing to the distributions of several Quercus species in the Intermountain West. Ann For. Sci. 53:291-302.
Lin G, Phillips SL, Ehleringer JR. 1996. Monsoonal precipitation responses of shrubs in a cold desert community on the Colorado Plateau. Oecologia 106:8-17.
Phillips SL, Ehleringer JR. 1995. Limited uptake of summer precipitation by bigtooth maple (Acer grandidentatum Nutt.) and Gambel’s oak (Quercus gambelii Nutt.). Trees 9:214-219.
Schuster WSF, Sandquist DR, Phillips SL, Ehleringer JR. 1994. High levels of genetic variation in populations of four dominant aridland plant species in Arizona. J. of Arid Environ. 27:159-167.
Flanagan LB, Phillips SL, Ehleringer JR, Lloyd J, Farquhar GD. 1994. Effect of changes in leaf water oxygen isotopic changes on discrimination against C18O16O during photosynthetic gas exchange. Aust. J. Plant Phys. 21:221-234.
Sandquist DR, Schuster WSF, Donovan LA, Phillips SL, Ehleringer JR. 1993. Differences in carbon isotope discrimination between seedlings and adults of southwestern desert perennial plants. Southwestern Nat. 38(3):212-217.
Schuster WSF, Phillips SL, Sandquist DR, Ehleringer JR. 1992. Heritability of carbon isotope discrimination in Gutierrezia microcephala (Asteraceae). Amer. J. Bot. 79(2):216-221.
Schuster WSF, Sandquist DR, Phillips SL, Ehleringer JR. 1992. Comparisons of carbon isotope discrimination in populations of aridland plant species differing in lifespan. Oecologia 91:332-337.
Ehleringer JR, Phillips SL, Comstock JP. 1992. Seasonal variation in the carbon isotopic composition of desert plants. Functional Ecology 6:396-404.
Ehleringer JR, Phillips SL, Schuster WSF, Sandquist DR. 1991. Differential utilization of summer rains by desert plants. Oecologia 88(3): 430-434.
Phillips SL. 1996. Comparative water use patterns of Quercus gambelii and Acer grandidentatum in Red Butte Canyon, Utah. MS Thesis, University of Utah.
Pollak O, Phillips SL, Shaw K, Herger L. 1988. Procedures manual for plant community dynamics subproject. Long-Term Ecological Research Data Report 88/1, Institute of Arctic and Alpine Research, Boulder, CO.
Flanagan LB, Phillips SL, Ehleringer JR, Lloyd J, Farquhar GD. 1994. Effect of changes in leaf water oxygen isotopic changes on discrimination against C18O16O during photosynthetic gas exchange. Aust. J. Plant Phys. 21:221-234.
**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.
To request an interview, contact fresc_outreach@usgs.gov or call (541) 750-1030.
New Center Director at the Forest and Rangeland Ecosystem Science Center New Center Director at the Forest and Rangeland Ecosystem Science Center
CORVALLIS, Ore. — The U.S. Geological Survey has selected Sue Phillips as the new center director of the Forest and Rangeland Ecosystem Science Center. FRESC is headquartered in Corvallis, Oregon, with research offices in Corvallis; Boise, Idaho; Seattle, Washington; and Olympic National Park in Port Angeles, Washington.
Science and Products
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Filter Total Items: 32
The influence of stream channels on distributions of Larrea tridentata and Ambrosia dumosa in the Mojave Desert, CA, USA: Patterns, mechanisms and effects of stream redistribution The influence of stream channels on distributions of Larrea tridentata and Ambrosia dumosa in the Mojave Desert, CA, USA: Patterns, mechanisms and effects of stream redistribution
Drainage channels are among the most conspicuous surficial features of deserts, but little quantitative analysis of their influence on plant distributions is available. We analysed the effects of desert stream channels (‘washes’) on Larrea tridentata and Ambrosia dumosa density and cover on an alluvial piedmont in the Mojave Desert, based on a spatial analysis of transect data...
Authors
S. Schwinning, D.R. Sandquist, D. M. Miller, D. R. Bedford, S. L. Phillips, J. Belnap
Sediment losses and gains across a gradient of livestock grazing and plant invasion in a cool, semi-arid grassland, Colorado Plateau, USA Sediment losses and gains across a gradient of livestock grazing and plant invasion in a cool, semi-arid grassland, Colorado Plateau, USA
Large sediment fluxes can have significant impacts on ecosystems. We measured incoming and outgoing sediment across a gradient of soil disturbance (livestock grazing, plowing) and annual plant invasion for 9 years. Our sites included two currently ungrazed sites: one never grazed by livestock and dominated by perennial grasses/well-developed biocrusts and one not grazed since 1974 and...
Authors
Jayne Belnap, Richard L. Reynolds, Marith C. Reheis, Susan L. Phillips, Frank Urban, Harland L. Goldstein
Global change and biological soil crusts: Effects of ultraviolet augmentation under altered precipitation regimes and nitrogen additions Global change and biological soil crusts: Effects of ultraviolet augmentation under altered precipitation regimes and nitrogen additions
Biological soil crusts (BSCs), a consortium of cyanobacteria, lichens, and mosses, are essential in most dryland ecosystems. As these organisms are relatively immobile and occur on the soil surface, they are exposed to high levels of ultraviolet (UV) radiation and atmospheric nitrogen (N) deposition, rising temperatures, and alterations in precipitation patterns. In this study, we...
Authors
J. Belnap, S. L. Phillips, S. Flint, J. Money, M. Caldwell
Visually assessing the level of development and soil surface stability of cyanobacterially dominated biological soil crusts Visually assessing the level of development and soil surface stability of cyanobacterially dominated biological soil crusts
Biological soil crusts (BSCs) are an integral part of dryland ecosystems and often included in long-term ecological monitoring programs. Estimating moss and lichen cover is fairly easy and non-destructive, but documenting cyanobacterial level of development (LOD) is more difficult. It requires sample collection for laboratory analysis, which causes soil surface disturbance. Assessing...
Authors
J. Belnap, S. L. Phillips, D.L. Witwicki, M. E. Miller
Wind erodibility of soils at Fort Irwin, California (Mojave Desert), USA, before and after trampling disturbance: Implications for land management Wind erodibility of soils at Fort Irwin, California (Mojave Desert), USA, before and after trampling disturbance: Implications for land management
Recently disturbed and 'control' (i.e. less recently disturbed) soils in the Mojave Desert were compared for their vulnerability to wind erosion, using a wind tunnel, before and after being experimentally trampled. Before trampling, control sites had greater cyanobacterial biomass, soil surface stability, threshold friction velocities (TFV, i.e. the wind speed required to move soil...
Authors
J. Belnap, S. L. Phillips, J. E. Herrick, J.R. Johansen
Dynamics of cover, UV-protective pigments, and quantum yield in biological soil crust communities of an undisturbed Mojave Desert shrubland Dynamics of cover, UV-protective pigments, and quantum yield in biological soil crust communities of an undisturbed Mojave Desert shrubland
Biological soil crusts are an integral part of dryland ecosystems. We monitored the cover of lichens and mosses, cyanobacterial biomass, concentrations of UV-protective pigments in both free-living and lichenized cyanobacteria, and quantum yield in the soil lichen species Collema in an undisturbed Mojave Desert shrubland. During our sampling time, the site received historically high and...
Authors
Jayne Belnap, Susan L. Phillips, Stanley D. Smith
Non-USGS Publications**
Brooks, J.R., Buchmann, N., Phillips, S.L., Ehleringer, B., Evans, R.D., Lott, M., Martinelli, L.A., Pockman, W.T., Sandquist, D.R., Sparks, J.P., Sperry, L., Williams, D., Ehleringer, J.R., 2002, Heavy and light beer- A carbon isotope approach to detect C4 carbon in beers of different origins, styles, and prices: Journal of Agricultural and Food Chemistry, v. 50, p. 6413-6418.
Ehleringer, J.R., Phillips, S.L., 1996, Ecophysiological factors contributing to the distributions of several Quercusspecies in the Intermountain West: Annales des Sciences Forestieres, v. 53, p. 291-302.
Ehleringer JR, Sandquist DR, Phillips SL. 1997. Burning coal seams in southern Utah: a natural system for studies of plant responses to elevated CO2. In: A. Raschi, F. Migleietta, R. Tugnetti and P. van Gardingen (eds), Plant Responses to Elevated CO2: Evidence from Natural Springs. Cambridge Univ Press. pp 56-68.
Ehleringer JR, Phillips SL. 1996. Ecophysiological factors contributing to the distributions of several Quercus species in the Intermountain West. Ann For. Sci. 53:291-302.
Lin G, Phillips SL, Ehleringer JR. 1996. Monsoonal precipitation responses of shrubs in a cold desert community on the Colorado Plateau. Oecologia 106:8-17.
Phillips SL, Ehleringer JR. 1995. Limited uptake of summer precipitation by bigtooth maple (Acer grandidentatum Nutt.) and Gambel’s oak (Quercus gambelii Nutt.). Trees 9:214-219.
Schuster WSF, Sandquist DR, Phillips SL, Ehleringer JR. 1994. High levels of genetic variation in populations of four dominant aridland plant species in Arizona. J. of Arid Environ. 27:159-167.
Flanagan LB, Phillips SL, Ehleringer JR, Lloyd J, Farquhar GD. 1994. Effect of changes in leaf water oxygen isotopic changes on discrimination against C18O16O during photosynthetic gas exchange. Aust. J. Plant Phys. 21:221-234.
Sandquist DR, Schuster WSF, Donovan LA, Phillips SL, Ehleringer JR. 1993. Differences in carbon isotope discrimination between seedlings and adults of southwestern desert perennial plants. Southwestern Nat. 38(3):212-217.
Schuster WSF, Phillips SL, Sandquist DR, Ehleringer JR. 1992. Heritability of carbon isotope discrimination in Gutierrezia microcephala (Asteraceae). Amer. J. Bot. 79(2):216-221.
Schuster WSF, Sandquist DR, Phillips SL, Ehleringer JR. 1992. Comparisons of carbon isotope discrimination in populations of aridland plant species differing in lifespan. Oecologia 91:332-337.
Ehleringer JR, Phillips SL, Comstock JP. 1992. Seasonal variation in the carbon isotopic composition of desert plants. Functional Ecology 6:396-404.
Ehleringer JR, Phillips SL, Schuster WSF, Sandquist DR. 1991. Differential utilization of summer rains by desert plants. Oecologia 88(3): 430-434.
Phillips SL. 1996. Comparative water use patterns of Quercus gambelii and Acer grandidentatum in Red Butte Canyon, Utah. MS Thesis, University of Utah.
Pollak O, Phillips SL, Shaw K, Herger L. 1988. Procedures manual for plant community dynamics subproject. Long-Term Ecological Research Data Report 88/1, Institute of Arctic and Alpine Research, Boulder, CO.
Flanagan LB, Phillips SL, Ehleringer JR, Lloyd J, Farquhar GD. 1994. Effect of changes in leaf water oxygen isotopic changes on discrimination against C18O16O during photosynthetic gas exchange. Aust. J. Plant Phys. 21:221-234.
**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.
To request an interview, contact fresc_outreach@usgs.gov or call (541) 750-1030.
New Center Director at the Forest and Rangeland Ecosystem Science Center New Center Director at the Forest and Rangeland Ecosystem Science Center
CORVALLIS, Ore. — The U.S. Geological Survey has selected Sue Phillips as the new center director of the Forest and Rangeland Ecosystem Science Center. FRESC is headquartered in Corvallis, Oregon, with research offices in Corvallis; Boise, Idaho; Seattle, Washington; and Olympic National Park in Port Angeles, Washington.