Craig D Snyder (Former Employee)
Science and Products
Filter Total Items: 22
Shallow bedrock limits groundwater seepage-based headwater climate refugia Shallow bedrock limits groundwater seepage-based headwater climate refugia
Groundwater/surface-water exchanges in streams are inexorably linked to adjacent aquifer dynamics. As surface-water temperatures continue to increase with climate warming, refugia created by groundwater connectivity is expected to enable cold water fish species to survive. The shallow alluvial aquifers that source groundwater seepage to headwater streams, however, may also be sensitive...
Authors
Martin A. Briggs, John W. Lane, Craig D. Snyder, Eric A. White, Zachary Johnson, David L. Nelms, Nathaniel P. Hitt
Dermocystidium sp. infection in Blue Ridge Sculpin captured in Maryland Dermocystidium sp. infection in Blue Ridge Sculpin captured in Maryland
Raised pale cysts were observed on Blue Ridge Sculpin Cottus caeruleomentum during stream fish community surveys in Catoctin Mountain Park, Maryland. When examined histologically, preserved sculpin exhibited multiple cysts containing spherical endospores with a refractile central body characteristic of Dermocystidiumspp. Cysts were not observed on the gills or internally. The portion of...
Authors
Vicki S. Blazer, Nathaniel P. Hitt, Craig D. Snyder, Erin Snook, Cynthia R. Adams
Accounting for groundwater in stream fish thermal habitat responses to climate change Accounting for groundwater in stream fish thermal habitat responses to climate change
Forecasting climate change effects on aquatic fauna and their habitat requires an understanding of how water temperature responds to changing air temperature (i.e., thermal sensitivity). Previous efforts to forecast climate effects on brook trout habitat have generally assumed uniform air-water temperature relationships over large areas that cannot account for groundwater inputs and...
Authors
Craig D. Snyder, Nathaniel P. Hitt, John A. Young
Synthesis and interpretation of surface-water quality and aquatic biota data collected in Shenandoah National Park, Virginia, 1979-2009 Synthesis and interpretation of surface-water quality and aquatic biota data collected in Shenandoah National Park, Virginia, 1979-2009
Shenandoah National Park in northern and central Virginia protects 777 square kilometers of mountain terrain in the Blue Ridge physiographic province and more than 90 streams containing diverse aquatic biota. Park managers and visitors are interested in the water quality of park streams and its ability to support healthy coldwater communities and species, such as the native brook trout...
Authors
John D. Jastram, Craig D. Snyder, Nathaniel P. Hitt, Karen C. Rice
Significance of headwater streams and perennial springs in ecological monitoring in Shenandoah National Park Significance of headwater streams and perennial springs in ecological monitoring in Shenandoah National Park
Shenandoah National Park has been monitoring water chemistry and benthic macroinvertebrates in stream ecosystems since 1979. These monitoring efforts were designed to assess the status and trends in stream condition associated with atmospheric deposition (acid rain) and changes in forest health due to gypsy moth infestations. The primary objective of the present research was to determine...
Authors
Craig D. Snyder, James R. Webb, John A. Young, Zane B. Johnson
Shale Gas Development and Brook Trout: Scaling Best Management Practices to Anticipate Cumulative Effects Shale Gas Development and Brook Trout: Scaling Best Management Practices to Anticipate Cumulative Effects
Shale gas development may involve trade-offs between energy development and benefits provided by natural ecosystems. However, current best management practices (BMPs) focus on mitigating localized ecological degradation. We review evidence for cumulative effects of natural gas development on brook trout (Salvelinus fontinalis) and conclude that BMPs should account for potential watershed...
Authors
David Smith, Craig D. Snyder, Nathaniel P. Hitt, John A. Young, Stephen P. Faulkner
Science and Products
Filter Total Items: 22
Shallow bedrock limits groundwater seepage-based headwater climate refugia Shallow bedrock limits groundwater seepage-based headwater climate refugia
Groundwater/surface-water exchanges in streams are inexorably linked to adjacent aquifer dynamics. As surface-water temperatures continue to increase with climate warming, refugia created by groundwater connectivity is expected to enable cold water fish species to survive. The shallow alluvial aquifers that source groundwater seepage to headwater streams, however, may also be sensitive...
Authors
Martin A. Briggs, John W. Lane, Craig D. Snyder, Eric A. White, Zachary Johnson, David L. Nelms, Nathaniel P. Hitt
Dermocystidium sp. infection in Blue Ridge Sculpin captured in Maryland Dermocystidium sp. infection in Blue Ridge Sculpin captured in Maryland
Raised pale cysts were observed on Blue Ridge Sculpin Cottus caeruleomentum during stream fish community surveys in Catoctin Mountain Park, Maryland. When examined histologically, preserved sculpin exhibited multiple cysts containing spherical endospores with a refractile central body characteristic of Dermocystidiumspp. Cysts were not observed on the gills or internally. The portion of...
Authors
Vicki S. Blazer, Nathaniel P. Hitt, Craig D. Snyder, Erin Snook, Cynthia R. Adams
Accounting for groundwater in stream fish thermal habitat responses to climate change Accounting for groundwater in stream fish thermal habitat responses to climate change
Forecasting climate change effects on aquatic fauna and their habitat requires an understanding of how water temperature responds to changing air temperature (i.e., thermal sensitivity). Previous efforts to forecast climate effects on brook trout habitat have generally assumed uniform air-water temperature relationships over large areas that cannot account for groundwater inputs and...
Authors
Craig D. Snyder, Nathaniel P. Hitt, John A. Young
Synthesis and interpretation of surface-water quality and aquatic biota data collected in Shenandoah National Park, Virginia, 1979-2009 Synthesis and interpretation of surface-water quality and aquatic biota data collected in Shenandoah National Park, Virginia, 1979-2009
Shenandoah National Park in northern and central Virginia protects 777 square kilometers of mountain terrain in the Blue Ridge physiographic province and more than 90 streams containing diverse aquatic biota. Park managers and visitors are interested in the water quality of park streams and its ability to support healthy coldwater communities and species, such as the native brook trout...
Authors
John D. Jastram, Craig D. Snyder, Nathaniel P. Hitt, Karen C. Rice
Significance of headwater streams and perennial springs in ecological monitoring in Shenandoah National Park Significance of headwater streams and perennial springs in ecological monitoring in Shenandoah National Park
Shenandoah National Park has been monitoring water chemistry and benthic macroinvertebrates in stream ecosystems since 1979. These monitoring efforts were designed to assess the status and trends in stream condition associated with atmospheric deposition (acid rain) and changes in forest health due to gypsy moth infestations. The primary objective of the present research was to determine...
Authors
Craig D. Snyder, James R. Webb, John A. Young, Zane B. Johnson
Shale Gas Development and Brook Trout: Scaling Best Management Practices to Anticipate Cumulative Effects Shale Gas Development and Brook Trout: Scaling Best Management Practices to Anticipate Cumulative Effects
Shale gas development may involve trade-offs between energy development and benefits provided by natural ecosystems. However, current best management practices (BMPs) focus on mitigating localized ecological degradation. We review evidence for cumulative effects of natural gas development on brook trout (Salvelinus fontinalis) and conclude that BMPs should account for potential watershed...
Authors
David Smith, Craig D. Snyder, Nathaniel P. Hitt, John A. Young, Stephen P. Faulkner