Justine Neville (left) and Brendan Crossman (right) work to download and examine the data obtained from the site's sap flow probes, which were installed in early May. To learn more, contact Justine Neville at jneville@usgs.gov or David Walters at davidwalters@usgs.gov.
David C Walters
David is a biological science tech with the Eastern Ecological Science Center at the Patuxent Research Refuge in Laurel, MD
David is a wetland ecologist, researching how coastal wetlands respond to sea level rise. With a background in biological and physical sciences, his work focuses on the interaction between wetland plant species and their physical environment.
Science and Products
Minerals Science Team
The Minerals Integrated Science Team focuses on contaminant exposures in the environment that might originate from mineral resource activities including, transportation, storage, extraction and waste management. Perceived health risks to humans and other organisms will be distinguished from actual risks, if any. If actual risks are identified the science produced by this team can inform how to...
Sap Flow Monitoring at Blackwater National Wildlife Refuge
Justine Neville (left) and Brendan Crossman (right) work to download and examine the data obtained from the site's sap flow probes, which were installed in early May. To learn more, contact Justine Neville at jneville@usgs.gov or David Walters at davidwalters@usgs.gov.
Sap flow sensors at Blackwater National Wildlife Preserve
Close up of the newly installed sap flow sensors at Blackwater National Wildlife Preserve. These sensors were installed by EESC's Justine Neville and Ken Krauss of the USGS Wetland and Aquatic Research Center in Lafayette, LA. These sensors will be used to analyze how the trees in a marsh ecosystem respond to changing ecological and climatic conditions.
Close up of the newly installed sap flow sensors at Blackwater National Wildlife Preserve. These sensors were installed by EESC's Justine Neville and Ken Krauss of the USGS Wetland and Aquatic Research Center in Lafayette, LA. These sensors will be used to analyze how the trees in a marsh ecosystem respond to changing ecological and climatic conditions.
Sap probe install
EESC USGS Mendenhall Fellow Justine Neville installing sap flow probes at Blackwater National Wildlife Refuge with USGS colleague Ken Krauss from USGS Wetland and Aquatic Research Center in Lafayette, LA. Sap flow probes will be used to monitor transpiration rates in coastal forests to assess the water usage of trees experiencing stress from inundation.
EESC USGS Mendenhall Fellow Justine Neville installing sap flow probes at Blackwater National Wildlife Refuge with USGS colleague Ken Krauss from USGS Wetland and Aquatic Research Center in Lafayette, LA. Sap flow probes will be used to monitor transpiration rates in coastal forests to assess the water usage of trees experiencing stress from inundation.
Measuring salinity as part of a vegetation survey
Brendan Crossman measures porewater salinity in a vegetation plot situated on a survey transect from the wetland into the adjacent upland forest.
Brendan Crossman measures porewater salinity in a vegetation plot situated on a survey transect from the wetland into the adjacent upland forest.
Science and Products
Minerals Science Team
The Minerals Integrated Science Team focuses on contaminant exposures in the environment that might originate from mineral resource activities including, transportation, storage, extraction and waste management. Perceived health risks to humans and other organisms will be distinguished from actual risks, if any. If actual risks are identified the science produced by this team can inform how to...
Sap Flow Monitoring at Blackwater National Wildlife Refuge
Justine Neville (left) and Brendan Crossman (right) work to download and examine the data obtained from the site's sap flow probes, which were installed in early May. To learn more, contact Justine Neville at jneville@usgs.gov or David Walters at davidwalters@usgs.gov.
Justine Neville (left) and Brendan Crossman (right) work to download and examine the data obtained from the site's sap flow probes, which were installed in early May. To learn more, contact Justine Neville at jneville@usgs.gov or David Walters at davidwalters@usgs.gov.
Sap flow sensors at Blackwater National Wildlife Preserve
Close up of the newly installed sap flow sensors at Blackwater National Wildlife Preserve. These sensors were installed by EESC's Justine Neville and Ken Krauss of the USGS Wetland and Aquatic Research Center in Lafayette, LA. These sensors will be used to analyze how the trees in a marsh ecosystem respond to changing ecological and climatic conditions.
Close up of the newly installed sap flow sensors at Blackwater National Wildlife Preserve. These sensors were installed by EESC's Justine Neville and Ken Krauss of the USGS Wetland and Aquatic Research Center in Lafayette, LA. These sensors will be used to analyze how the trees in a marsh ecosystem respond to changing ecological and climatic conditions.
Sap probe install
EESC USGS Mendenhall Fellow Justine Neville installing sap flow probes at Blackwater National Wildlife Refuge with USGS colleague Ken Krauss from USGS Wetland and Aquatic Research Center in Lafayette, LA. Sap flow probes will be used to monitor transpiration rates in coastal forests to assess the water usage of trees experiencing stress from inundation.
EESC USGS Mendenhall Fellow Justine Neville installing sap flow probes at Blackwater National Wildlife Refuge with USGS colleague Ken Krauss from USGS Wetland and Aquatic Research Center in Lafayette, LA. Sap flow probes will be used to monitor transpiration rates in coastal forests to assess the water usage of trees experiencing stress from inundation.
Measuring salinity as part of a vegetation survey
Brendan Crossman measures porewater salinity in a vegetation plot situated on a survey transect from the wetland into the adjacent upland forest.
Brendan Crossman measures porewater salinity in a vegetation plot situated on a survey transect from the wetland into the adjacent upland forest.