Gregory B Lawrence (Former Employee)
Science and Products
Filter Total Items: 110
Inter-laboratory variation in the chemical analysis of acidic forest soil reference samples from eastern North America Inter-laboratory variation in the chemical analysis of acidic forest soil reference samples from eastern North America
Long-term forest soil monitoring and research often requires a comparison of laboratory data generated at different times and in different laboratories. Quantifying the uncertainty associated with these analyses is necessary to assess temporal changes in soil properties. Forest soil chemical properties, and methods to measure these properties, often differ from agronomic and...
Authors
Donald S. Ross, Scott W Bailiey, Russell D Briggs, Johanna Curry, Ivan J. Fernandez, Guinevere Fredriksen, Christine L. Goodale, Paul W. Hazlett, Paul R Heine, Chris E. Johnson, John T Larson, Gregory B. Lawrence, Randy K Kolka, Ouimet, D Pare, Daniel D. Richter, Charles D Shirmer, Richard A.F. Warby
Acidic deposition along the Appalachian Trail corridor and its effects on acid-sensitive terrestrial and aquatic resources Acidic deposition along the Appalachian Trail corridor and its effects on acid-sensitive terrestrial and aquatic resources
The Appalachian National Scenic Trail (AT), a unit of the National Park Service (NPS), spans nearly 2,200 miles from Georgia to Maine, encompassing a diverse range of ecosystems. Acidic deposition (acid rain) threatens the AT’s natural resources. Acid rain is a result of sulfur (S) and nitrogen (N) compounds produced from fossil fuel combustion, motor vehicles, and agricultural practices...
Authors
Gregory B. Lawrence, Timothy J. Sullivan, Douglas A. Burns, Scott W. Bailey, Bernard J. Cosby, Martin Dovciak, Holly A. Ewing, Todd C. McDonnell, Rakesh Minocha, Rachel Riemann, Juliana Quant, Karen C. Rice, Jason Siemion, Kathleen C. Weathers
Long-term soil monitoring at U.S. Geological Survey reference watersheds Long-term soil monitoring at U.S. Geological Survey reference watersheds
Monitoring the environment by making repeated measurements through time is essential to evaluate and track the health of ecosystems (fig. 1). Long-term datasets produced by such monitoring are indispensable for evaluating the effectiveness of environmental legislation and for designing mitigation strategies to address environmental changes in an era when human activities are altering the
Authors
Michael R. McHale, Jason Siemion, Gregory B. Lawrence, M. Alisa Mast
Evaluating the efficiency of environmental monitoring programs Evaluating the efficiency of environmental monitoring programs
Statistical uncertainty analyses can be used to improve the efficiency of environmental monitoring, allowing sampling designs to maximize information gained relative to resources required for data collection and analysis. In this paper, we illustrate four methods of data analysis appropriate to four types of environmental monitoring designs. To analyze a long-term record from a single...
Authors
Carrie R. Levine, Ruth D. Yanai, Gregory G. Lampman, Douglas A. Burns, Charles T. Driscoll, Gregory B. Lawrence, Jason Lynch, Nina Schoch
Wetlands serve as natural sources for improvement of stream ecosystem health in regions affected by acid deposition Wetlands serve as natural sources for improvement of stream ecosystem health in regions affected by acid deposition
For over 40 years, acid deposition has been recognized as a serious international environmental problem, but efforts to restore acidified streams and biota have had limited success. The need to better understand the effects of different sources of acidity on streams has become more pressing with the recent increases in surface water organic acids, or 'brownification' associated with...
Authors
Katrina L Pound, Gregory B. Lawrence, Sophia I. Passy
Measuring environmental change in forest ecosystems by repeated soil sampling: a North American perspective Measuring environmental change in forest ecosystems by repeated soil sampling: a North American perspective
Environmental change is monitored in North America through repeated measurements of weather, stream and river flow, air and water quality, and most recently, soil properties. Some skepticism remains, however, about whether repeated soil sampling can effectively distinguish between temporal and spatial variability, and efforts to document soil change in forest ecosystems through repeated
Authors
Gregory B. Lawrence, Ivan J. Fernandez, Daniel D. Richter, Donald S. Ross, Paul W. Hazlett, Scott W. Bailey, Oiumet, Richard A.F. Warby, Arthur H. Johnson, Henry Lin, James M. Kaste, Andrew G. Lapenis, Timothy J. Sullivan
Science and Products
Filter Total Items: 110
Inter-laboratory variation in the chemical analysis of acidic forest soil reference samples from eastern North America Inter-laboratory variation in the chemical analysis of acidic forest soil reference samples from eastern North America
Long-term forest soil monitoring and research often requires a comparison of laboratory data generated at different times and in different laboratories. Quantifying the uncertainty associated with these analyses is necessary to assess temporal changes in soil properties. Forest soil chemical properties, and methods to measure these properties, often differ from agronomic and...
Authors
Donald S. Ross, Scott W Bailiey, Russell D Briggs, Johanna Curry, Ivan J. Fernandez, Guinevere Fredriksen, Christine L. Goodale, Paul W. Hazlett, Paul R Heine, Chris E. Johnson, John T Larson, Gregory B. Lawrence, Randy K Kolka, Ouimet, D Pare, Daniel D. Richter, Charles D Shirmer, Richard A.F. Warby
Acidic deposition along the Appalachian Trail corridor and its effects on acid-sensitive terrestrial and aquatic resources Acidic deposition along the Appalachian Trail corridor and its effects on acid-sensitive terrestrial and aquatic resources
The Appalachian National Scenic Trail (AT), a unit of the National Park Service (NPS), spans nearly 2,200 miles from Georgia to Maine, encompassing a diverse range of ecosystems. Acidic deposition (acid rain) threatens the AT’s natural resources. Acid rain is a result of sulfur (S) and nitrogen (N) compounds produced from fossil fuel combustion, motor vehicles, and agricultural practices...
Authors
Gregory B. Lawrence, Timothy J. Sullivan, Douglas A. Burns, Scott W. Bailey, Bernard J. Cosby, Martin Dovciak, Holly A. Ewing, Todd C. McDonnell, Rakesh Minocha, Rachel Riemann, Juliana Quant, Karen C. Rice, Jason Siemion, Kathleen C. Weathers
Long-term soil monitoring at U.S. Geological Survey reference watersheds Long-term soil monitoring at U.S. Geological Survey reference watersheds
Monitoring the environment by making repeated measurements through time is essential to evaluate and track the health of ecosystems (fig. 1). Long-term datasets produced by such monitoring are indispensable for evaluating the effectiveness of environmental legislation and for designing mitigation strategies to address environmental changes in an era when human activities are altering the
Authors
Michael R. McHale, Jason Siemion, Gregory B. Lawrence, M. Alisa Mast
Evaluating the efficiency of environmental monitoring programs Evaluating the efficiency of environmental monitoring programs
Statistical uncertainty analyses can be used to improve the efficiency of environmental monitoring, allowing sampling designs to maximize information gained relative to resources required for data collection and analysis. In this paper, we illustrate four methods of data analysis appropriate to four types of environmental monitoring designs. To analyze a long-term record from a single...
Authors
Carrie R. Levine, Ruth D. Yanai, Gregory G. Lampman, Douglas A. Burns, Charles T. Driscoll, Gregory B. Lawrence, Jason Lynch, Nina Schoch
Wetlands serve as natural sources for improvement of stream ecosystem health in regions affected by acid deposition Wetlands serve as natural sources for improvement of stream ecosystem health in regions affected by acid deposition
For over 40 years, acid deposition has been recognized as a serious international environmental problem, but efforts to restore acidified streams and biota have had limited success. The need to better understand the effects of different sources of acidity on streams has become more pressing with the recent increases in surface water organic acids, or 'brownification' associated with...
Authors
Katrina L Pound, Gregory B. Lawrence, Sophia I. Passy
Measuring environmental change in forest ecosystems by repeated soil sampling: a North American perspective Measuring environmental change in forest ecosystems by repeated soil sampling: a North American perspective
Environmental change is monitored in North America through repeated measurements of weather, stream and river flow, air and water quality, and most recently, soil properties. Some skepticism remains, however, about whether repeated soil sampling can effectively distinguish between temporal and spatial variability, and efforts to document soil change in forest ecosystems through repeated
Authors
Gregory B. Lawrence, Ivan J. Fernandez, Daniel D. Richter, Donald S. Ross, Paul W. Hazlett, Scott W. Bailey, Oiumet, Richard A.F. Warby, Arthur H. Johnson, Henry Lin, James M. Kaste, Andrew G. Lapenis, Timothy J. Sullivan