Gregory B Lawrence (Former Employee)
Science and Products
Filter Total Items: 109
One-day rate measurements for estimating net nitrification potential in humid forest soils One-day rate measurements for estimating net nitrification potential in humid forest soils
Measurements of net nitrification rates in forest soils have usually been performed by extended sample incubation (2-8 weeks), either in the field or in the lab. Because of disturbance effects, these measurements are only estimates of nitrification potential and shorter incubations may suffice. In three separate studies of northeastern USA forest soil surface horizons, we found that...
Authors
D.S. Ross, G. Fredriksen, A.E. Jamison, B.C. Wemple, S.W. Bailey, J. B. Shanley, G.B. Lawrence
Quality-assurance data for routine water analyses by the U.S. Geological Survey Laboratory in Troy, New York—July 1995 through June 1997 Quality-assurance data for routine water analyses by the U.S. Geological Survey Laboratory in Troy, New York—July 1995 through June 1997
The laboratory for analysis of low-ionic-strength water at the U.S. Geological Survey (USGS) office in Troy, N.Y. analyzes samples collected by USGS projects in the Northeast. The laboratory’s quality-assurance program is based on internal and interlaboratory quality-assurance samples and quality-control procedures developed to ensure proper sample collection, processing, and analysis...
Authors
Tricia A. Lincoln, Debra A. Horan-Ross, Michael R. McHale, Gregory B. Lawrence
Climate dependency of tree growth suppressed by acid deposition effects on soils in Northwest Russia Climate dependency of tree growth suppressed by acid deposition effects on soils in Northwest Russia
Increased tree growth in temperate and boreal forests has been proposed as a direct consequence of a warming climate. Acid deposition effects on nutrient availability may influence the climate dependency of tree growth, however. This study presents an analysis of archived soil samples that has enabled changes in soil chemistry to be tracked with patterns of tree growth through the 20th...
Authors
G.B. Lawrence, A.G. Lapenis, D. Berggren, B.F. Aparin, K.T. Smith, W.C. Shortle, S.W. Bailey, D.L. Varlyguin, B. Babikov
Use of stream chemistry for monitoring acidic deposition effects in the Adirondack region of New York Use of stream chemistry for monitoring acidic deposition effects in the Adirondack region of New York
Acid-neutralizing capacity (ANC) and pH were measured weekly from October 1991 through September 2001 in three streams in the western Adirondack Mountain region of New York to identify trends in stream chemistry that might be related to changes in acidic deposition. A decreasing trend in atmospheric deposition of SO42- was observed within the region over the 10-yr period, although most...
Authors
G.B. Lawrence, B. Momen, K. M. Roy
Acidification of forest soil in Russia: From 1893 to present Acidification of forest soil in Russia: From 1893 to present
It is commonly believed that fine-textured soils developed on carbonate parent material are well buffered from possible acidification. There are no data, however, that document resistance of such soils to acidic deposition exposure on a timescale longer than 30-40 years. In this paper, we report on directly testing the long-term buffering capacity of nineteenth century forest soils...
Authors
A.G. Lapenis, G.B. Lawrence, A.A. Andreev, A.A. Bobrov, M.S. Torn, J.W. Harden
Mineralization and nitrification patterns at eight northeastern USA forested research sites Mineralization and nitrification patterns at eight northeastern USA forested research sites
Nitrogen transformation rates in eight northeastern US research sites were measured in soil samples taken in the early season of 2000 and the late season of 2001. Net mineralization and nitrification rates were determined on Oa or A horizon samples by two different sampling methods - intact cores and repeated measurements on composite samples taken from around the cores. Net rates in the...
Authors
D.S. Ross, G.B. Lawrence, G. Fredriksen
Persistent episodic acidification of streams linked to acid rain effects on soil Persistent episodic acidification of streams linked to acid rain effects on soil
Episodic acidification of streams, identified in the late 1980s as one of the most significant environmental problems caused by acidic deposition, had not been evaluated since the early 1990s despite decreasing levels of acidic deposition over the past decade. This analysis indicates that episodic acidification of streams in upland regions in the northeastern United States persists, and...
Authors
G.B. Lawrence
Quality-assurance data for routine water quality analyses by the U. S. Geological Survey laboratory in Troy, New York; July 1993 through June 1995 Quality-assurance data for routine water quality analyses by the U. S. Geological Survey laboratory in Troy, New York; July 1993 through June 1995
A laboratory for analysis of low-ionic strength water has been developed at the U.S. Geological Survey (USGS) office in Troy, N.Y., to analyze samples collected by USGS projects in the Northeast. The laboratory's quality-assurance program is based on internal and interlaboratory quality-assurance samples and quality-control procedures developed to ensure proper sample collection...
Authors
Tricia A. Lincoln, Debra A. Horan-Ross, Michael R. McHale, Gregory B. Lawrence
Controls of stream chemistry and fish populations in the Neversink watershed, Catskill Mountains, New York Controls of stream chemistry and fish populations in the Neversink watershed, Catskill Mountains, New York
The Neversink Watershed Study was initiated in 1991 to develop an understanding of the key natural processes that control water quality within the forested, 166 km 2 (64 mi 2), Neversink River watershed; part of the New York City drinking water supply system, in the Catskill Mountain region of New York. The study entailed (1) hydrological investigations of water movement from the...
Authors
Gregory B. Lawrence, Douglas A. Burns, Barry P. Baldigo, Peter S. Murdoch, Gary M. Lovett
Effects of stream acidification and habitat on fish populations of a North American river Effects of stream acidification and habitat on fish populations of a North American river
Water quality, physical habitat, and fisheries at sixteen reaches in the Neversink River Basin were studied during 1991-95 to identify the effects of acidic precipitation on stream-water chemistry and on selected fish-species populations, and to test the hypothesis that the degree of stream acidification affected the spatial distribution of each fish-species population. Most sites on the...
Authors
Barry P. Baldigo, Gregory B. Lawrence
Acidic deposition in the northeastern United States: Sources and inputs, ecosystem effects, and management strategies: The effects of acidic deposition in the northeastern United States include the acidification of soil and water, which stresses terrestri Acidic deposition in the northeastern United States: Sources and inputs, ecosystem effects, and management strategies: The effects of acidic deposition in the northeastern United States include the acidification of soil and water, which stresses terrestri
Acidic deposition is the transfer of strong acids and acid-forming substances from the atmosphere to the surface of the Earth. The composition of acidic deposition includes ions, gases, and particles derived from the following: gaseous emissions of sulfur dioxide (SO2), nitrogen oxides (NOx), ammonia (NH3), and particulate emissions of acidifying and neutralizing compounds. Over the past...
Authors
C. T. Driscoll, Gregory B. Lawrence, Arthur J. Bulger, Thomas Butler, C. S. Cronan, C. Eagar, Kathleen Fallon Lambert, Gene E Likens, John L Stoddard, Kathleen C. Weathers
Atmospheric deposition and watershed nitrogen export along an elevational gradient in the Catskill Mountains, New York Atmospheric deposition and watershed nitrogen export along an elevational gradient in the Catskill Mountains, New York
Cumulative effects of atmospheric N deposition may increase N export from watersheds and contribute to the acidification of surface waters, but natural factors (such as forest productivity and soil drainage) that affect forest N cycling can also control watershed N export. To identify factors that are related to stream-water export of N, elevational gradients in atmospheric deposition...
Authors
G.B. Lawrence, Gary M. Lovett, Y. H. Baevsky
Science and Products
Filter Total Items: 109
One-day rate measurements for estimating net nitrification potential in humid forest soils One-day rate measurements for estimating net nitrification potential in humid forest soils
Measurements of net nitrification rates in forest soils have usually been performed by extended sample incubation (2-8 weeks), either in the field or in the lab. Because of disturbance effects, these measurements are only estimates of nitrification potential and shorter incubations may suffice. In three separate studies of northeastern USA forest soil surface horizons, we found that...
Authors
D.S. Ross, G. Fredriksen, A.E. Jamison, B.C. Wemple, S.W. Bailey, J. B. Shanley, G.B. Lawrence
Quality-assurance data for routine water analyses by the U.S. Geological Survey Laboratory in Troy, New York—July 1995 through June 1997 Quality-assurance data for routine water analyses by the U.S. Geological Survey Laboratory in Troy, New York—July 1995 through June 1997
The laboratory for analysis of low-ionic-strength water at the U.S. Geological Survey (USGS) office in Troy, N.Y. analyzes samples collected by USGS projects in the Northeast. The laboratory’s quality-assurance program is based on internal and interlaboratory quality-assurance samples and quality-control procedures developed to ensure proper sample collection, processing, and analysis...
Authors
Tricia A. Lincoln, Debra A. Horan-Ross, Michael R. McHale, Gregory B. Lawrence
Climate dependency of tree growth suppressed by acid deposition effects on soils in Northwest Russia Climate dependency of tree growth suppressed by acid deposition effects on soils in Northwest Russia
Increased tree growth in temperate and boreal forests has been proposed as a direct consequence of a warming climate. Acid deposition effects on nutrient availability may influence the climate dependency of tree growth, however. This study presents an analysis of archived soil samples that has enabled changes in soil chemistry to be tracked with patterns of tree growth through the 20th...
Authors
G.B. Lawrence, A.G. Lapenis, D. Berggren, B.F. Aparin, K.T. Smith, W.C. Shortle, S.W. Bailey, D.L. Varlyguin, B. Babikov
Use of stream chemistry for monitoring acidic deposition effects in the Adirondack region of New York Use of stream chemistry for monitoring acidic deposition effects in the Adirondack region of New York
Acid-neutralizing capacity (ANC) and pH were measured weekly from October 1991 through September 2001 in three streams in the western Adirondack Mountain region of New York to identify trends in stream chemistry that might be related to changes in acidic deposition. A decreasing trend in atmospheric deposition of SO42- was observed within the region over the 10-yr period, although most...
Authors
G.B. Lawrence, B. Momen, K. M. Roy
Acidification of forest soil in Russia: From 1893 to present Acidification of forest soil in Russia: From 1893 to present
It is commonly believed that fine-textured soils developed on carbonate parent material are well buffered from possible acidification. There are no data, however, that document resistance of such soils to acidic deposition exposure on a timescale longer than 30-40 years. In this paper, we report on directly testing the long-term buffering capacity of nineteenth century forest soils...
Authors
A.G. Lapenis, G.B. Lawrence, A.A. Andreev, A.A. Bobrov, M.S. Torn, J.W. Harden
Mineralization and nitrification patterns at eight northeastern USA forested research sites Mineralization and nitrification patterns at eight northeastern USA forested research sites
Nitrogen transformation rates in eight northeastern US research sites were measured in soil samples taken in the early season of 2000 and the late season of 2001. Net mineralization and nitrification rates were determined on Oa or A horizon samples by two different sampling methods - intact cores and repeated measurements on composite samples taken from around the cores. Net rates in the...
Authors
D.S. Ross, G.B. Lawrence, G. Fredriksen
Persistent episodic acidification of streams linked to acid rain effects on soil Persistent episodic acidification of streams linked to acid rain effects on soil
Episodic acidification of streams, identified in the late 1980s as one of the most significant environmental problems caused by acidic deposition, had not been evaluated since the early 1990s despite decreasing levels of acidic deposition over the past decade. This analysis indicates that episodic acidification of streams in upland regions in the northeastern United States persists, and...
Authors
G.B. Lawrence
Quality-assurance data for routine water quality analyses by the U. S. Geological Survey laboratory in Troy, New York; July 1993 through June 1995 Quality-assurance data for routine water quality analyses by the U. S. Geological Survey laboratory in Troy, New York; July 1993 through June 1995
A laboratory for analysis of low-ionic strength water has been developed at the U.S. Geological Survey (USGS) office in Troy, N.Y., to analyze samples collected by USGS projects in the Northeast. The laboratory's quality-assurance program is based on internal and interlaboratory quality-assurance samples and quality-control procedures developed to ensure proper sample collection...
Authors
Tricia A. Lincoln, Debra A. Horan-Ross, Michael R. McHale, Gregory B. Lawrence
Controls of stream chemistry and fish populations in the Neversink watershed, Catskill Mountains, New York Controls of stream chemistry and fish populations in the Neversink watershed, Catskill Mountains, New York
The Neversink Watershed Study was initiated in 1991 to develop an understanding of the key natural processes that control water quality within the forested, 166 km 2 (64 mi 2), Neversink River watershed; part of the New York City drinking water supply system, in the Catskill Mountain region of New York. The study entailed (1) hydrological investigations of water movement from the...
Authors
Gregory B. Lawrence, Douglas A. Burns, Barry P. Baldigo, Peter S. Murdoch, Gary M. Lovett
Effects of stream acidification and habitat on fish populations of a North American river Effects of stream acidification and habitat on fish populations of a North American river
Water quality, physical habitat, and fisheries at sixteen reaches in the Neversink River Basin were studied during 1991-95 to identify the effects of acidic precipitation on stream-water chemistry and on selected fish-species populations, and to test the hypothesis that the degree of stream acidification affected the spatial distribution of each fish-species population. Most sites on the...
Authors
Barry P. Baldigo, Gregory B. Lawrence
Acidic deposition in the northeastern United States: Sources and inputs, ecosystem effects, and management strategies: The effects of acidic deposition in the northeastern United States include the acidification of soil and water, which stresses terrestri Acidic deposition in the northeastern United States: Sources and inputs, ecosystem effects, and management strategies: The effects of acidic deposition in the northeastern United States include the acidification of soil and water, which stresses terrestri
Acidic deposition is the transfer of strong acids and acid-forming substances from the atmosphere to the surface of the Earth. The composition of acidic deposition includes ions, gases, and particles derived from the following: gaseous emissions of sulfur dioxide (SO2), nitrogen oxides (NOx), ammonia (NH3), and particulate emissions of acidifying and neutralizing compounds. Over the past...
Authors
C. T. Driscoll, Gregory B. Lawrence, Arthur J. Bulger, Thomas Butler, C. S. Cronan, C. Eagar, Kathleen Fallon Lambert, Gene E Likens, John L Stoddard, Kathleen C. Weathers
Atmospheric deposition and watershed nitrogen export along an elevational gradient in the Catskill Mountains, New York Atmospheric deposition and watershed nitrogen export along an elevational gradient in the Catskill Mountains, New York
Cumulative effects of atmospheric N deposition may increase N export from watersheds and contribute to the acidification of surface waters, but natural factors (such as forest productivity and soil drainage) that affect forest N cycling can also control watershed N export. To identify factors that are related to stream-water export of N, elevational gradients in atmospheric deposition...
Authors
G.B. Lawrence, Gary M. Lovett, Y. H. Baevsky