Gregory B Lawrence (Former Employee)
Science and Products
Filter Total Items: 109
Early indications of soil recovery from acidic deposition in U.S. red spruce forests Early indications of soil recovery from acidic deposition in U.S. red spruce forests
Forty to fifty percent decreases in acidic deposition through the 1980s and 1990s led to partial recovery of acidified surface waters in the northeastern United States; however, the limited number of studies that have assessed soil change found increased soil acidification during this period. From existing data, it's not clear whether soils continued to worsen in the 1990s or if recovery...
Authors
Gregory B. Lawrence, Walter C. Shortle, Mark B. David, Kevin T. Smith, Richard A.F. Warby, Andrei G. Lapenis
Spatial patterns of soil nitrification and nitrate export from forested headwaters in the northeastern United States Spatial patterns of soil nitrification and nitrate export from forested headwaters in the northeastern United States
Nitrogen export from small forested watersheds is known to be affected by N deposition but with high regional variability. We studied 10 headwater catchments in the northeastern United States across a gradient of N deposition (5.4 - 9.4 kg ha -1 yr -1) to determine if soil nitrification rates could explain differences in stream water NO 3 - export. Average annual export of two years...
Authors
D.S. Ross, J. B. Shanley, J.L. Campbell, G.B. Lawrence, S.W. Bailey, G.E. Likens, B.C. Wemple, G. Fredriksen, A.E. Jamison
Changes in the chemistry of acidified Adirondack streams from the early 1980s to 2008 Changes in the chemistry of acidified Adirondack streams from the early 1980s to 2008
Lakes in the Adirondack region of New York have partially recovered in response to declining deposition, but information on stream recovery is limited. Here we report results of Adirondack stream monitoring from the early 1980s to 2008. Despite a 50% reduction in atmospheric deposition of sulfur, overall increases in pH of only 0.28 and ANC of 13 μeq L−1 were observed in 12 streams over...
Authors
G.B. Lawrence, H. A. Simonin, Barry P. Baldigo, K. M. Roy, S. B. Capone
Acid rain effects on Adirondack streams— Results from the 2003–05 Western Adirondack Stream Survey (the WASS Project) Acid rain effects on Adirondack streams— Results from the 2003–05 Western Adirondack Stream Survey (the WASS Project)
Traditionally lakes have been the focus of acid rain assessments in the Adirondack region of New York. However, there is a growing recognition of the importance of streams as environmental indicators. Streams, like lakes, also provide important aquatic habitat, but streams more closely reflect acid rain effects on soils and forests and are more prone to acidification than lakes...
Authors
Gregory B. Lawrence, Karen M. Roy, Barry P. Baldigo, Howard A. Simonin, Sophia I. Passy, Robert W. Bode, Susan B. Capone
Impacts of acidification on macroinvertebrate communities in streams of the western Adirondack Mountains, New York, USA Impacts of acidification on macroinvertebrate communities in streams of the western Adirondack Mountains, New York, USA
Limited stream chemistry and macroinvertebrate data indicate that acidic deposition has adversely affected benthic macroinvertebrate assemblages in numerous headwater streams of the western Adirondack Mountains of New York. No studies, however, have quantified the effects that acidic deposition and acidification may have had on resident fish and macroinvertebrate communities in streams...
Authors
Barry P. Baldigo, G.B. Lawrence, R.W. Bode, H. A. Simonin, K. M. Roy, A. J. Smith
Quality-assurance data for routine water analyses by the U.S. Geological Survey laboratory in Troy, New York - July 2003 through June 2005 Quality-assurance data for routine water analyses by the U.S. Geological Survey laboratory in Troy, New York - July 2003 through June 2005
The laboratory for analysis of low-ionic-strength water at the U.S. Geological Survey (USGS) Water Science Center in Troy, N.Y., analyzes samples collected by USGS projects throughout the Northeast. The laboratory's quality-assurance program is based on internal and interlaboratory quality-assurance samples and quality-control procedures that were developed to ensure proper sample...
Authors
Tricia A. Lincoln, Debra A. Horan-Ross, Michael R. McHale, Gregory B. Lawrence
Science and Products
Filter Total Items: 109
Early indications of soil recovery from acidic deposition in U.S. red spruce forests Early indications of soil recovery from acidic deposition in U.S. red spruce forests
Forty to fifty percent decreases in acidic deposition through the 1980s and 1990s led to partial recovery of acidified surface waters in the northeastern United States; however, the limited number of studies that have assessed soil change found increased soil acidification during this period. From existing data, it's not clear whether soils continued to worsen in the 1990s or if recovery...
Authors
Gregory B. Lawrence, Walter C. Shortle, Mark B. David, Kevin T. Smith, Richard A.F. Warby, Andrei G. Lapenis
Spatial patterns of soil nitrification and nitrate export from forested headwaters in the northeastern United States Spatial patterns of soil nitrification and nitrate export from forested headwaters in the northeastern United States
Nitrogen export from small forested watersheds is known to be affected by N deposition but with high regional variability. We studied 10 headwater catchments in the northeastern United States across a gradient of N deposition (5.4 - 9.4 kg ha -1 yr -1) to determine if soil nitrification rates could explain differences in stream water NO 3 - export. Average annual export of two years...
Authors
D.S. Ross, J. B. Shanley, J.L. Campbell, G.B. Lawrence, S.W. Bailey, G.E. Likens, B.C. Wemple, G. Fredriksen, A.E. Jamison
Changes in the chemistry of acidified Adirondack streams from the early 1980s to 2008 Changes in the chemistry of acidified Adirondack streams from the early 1980s to 2008
Lakes in the Adirondack region of New York have partially recovered in response to declining deposition, but information on stream recovery is limited. Here we report results of Adirondack stream monitoring from the early 1980s to 2008. Despite a 50% reduction in atmospheric deposition of sulfur, overall increases in pH of only 0.28 and ANC of 13 μeq L−1 were observed in 12 streams over...
Authors
G.B. Lawrence, H. A. Simonin, Barry P. Baldigo, K. M. Roy, S. B. Capone
Acid rain effects on Adirondack streams— Results from the 2003–05 Western Adirondack Stream Survey (the WASS Project) Acid rain effects on Adirondack streams— Results from the 2003–05 Western Adirondack Stream Survey (the WASS Project)
Traditionally lakes have been the focus of acid rain assessments in the Adirondack region of New York. However, there is a growing recognition of the importance of streams as environmental indicators. Streams, like lakes, also provide important aquatic habitat, but streams more closely reflect acid rain effects on soils and forests and are more prone to acidification than lakes...
Authors
Gregory B. Lawrence, Karen M. Roy, Barry P. Baldigo, Howard A. Simonin, Sophia I. Passy, Robert W. Bode, Susan B. Capone
Impacts of acidification on macroinvertebrate communities in streams of the western Adirondack Mountains, New York, USA Impacts of acidification on macroinvertebrate communities in streams of the western Adirondack Mountains, New York, USA
Limited stream chemistry and macroinvertebrate data indicate that acidic deposition has adversely affected benthic macroinvertebrate assemblages in numerous headwater streams of the western Adirondack Mountains of New York. No studies, however, have quantified the effects that acidic deposition and acidification may have had on resident fish and macroinvertebrate communities in streams...
Authors
Barry P. Baldigo, G.B. Lawrence, R.W. Bode, H. A. Simonin, K. M. Roy, A. J. Smith
Quality-assurance data for routine water analyses by the U.S. Geological Survey laboratory in Troy, New York - July 2003 through June 2005 Quality-assurance data for routine water analyses by the U.S. Geological Survey laboratory in Troy, New York - July 2003 through June 2005
The laboratory for analysis of low-ionic-strength water at the U.S. Geological Survey (USGS) Water Science Center in Troy, N.Y., analyzes samples collected by USGS projects throughout the Northeast. The laboratory's quality-assurance program is based on internal and interlaboratory quality-assurance samples and quality-control procedures that were developed to ensure proper sample...
Authors
Tricia A. Lincoln, Debra A. Horan-Ross, Michael R. McHale, Gregory B. Lawrence