A5021165911- Plant Water Relations and Carbon Dynamics
- Hydrology and Watershed Management Studies
- Forest ecology and management
- Tree-ring climate responses
- Hydrology and Sediment Transport Processes
- Soil Carbon and Nitrogen Dynamics
- Soil and Water Nutrient Dynamics
- Soil erosion and sediment transport
- Cryospheric studies and observations
- Plant responses to elevated CO2
- Fire effects on ecosystems
- Flood Risk Assessment and Management
- Soil Moisture and Remote Sensing
- Seedling growth and survival studies
- Water Quality and Resources Studies
- Remote Sensing and LiDAR Applications
- Fish Ecology and Management Studies
- Peatlands and Wetlands Ecology
- Soil and Unsaturated Flow
- Precipitation Measurement and Analysis
- Water resources management and optimization
- Climate change and permafrost
- Forest Ecology and Biodiversity Studies
- Forest Biomass Utilization and Management
- Flow Measurement and Analysis
Southern Research Station
2005-2025
US Forest Service
2006-2025
Southern Research Institute
2020-2025
Triangle
2020-2024
Texas A&M University
2003
Alabama Agricultural and Mechanical University
1997
Abstract. Plant transpiration links physiological responses of vegetation to water supply and demand with hydrological, energy, carbon budgets at the land–atmosphere interface. However, despite being main land evaporative flux global scale, its response environmental drivers are currently not well constrained by observations. Here we introduce first compilation whole-plant data from sap flow measurements (SAPFLUXNET, https://sapfluxnet.creaf.cat/, last access: 8 June 2021). We harmonized...
The study examined the relationships between whole tree hydraulic conductance (K(tree)) and in roots (K(root)) leaves (K(leaf)) loblolly pine trees. In addition, role of seasonal variations K(root) K(leaf) mediating stomatal control transpiration its response to vapour pressure deficit (D) as soil-dried was studied. Compared trunk branches, had highest loss conductivity contributed more than 75% total resistance. Drought altered partitioning resistance leaves. As soil moisture dropped below...
Abstract The ecohydrologic effects of urbanization that is dominated by forests clearing are not well understood in the southeastern United States. We utilized long‐term monitoring data to quantify annual water balance, stormflow characteristics, and seasonal flow patterns an urbanized watershed (UR) (0·70 km 2 ) compared it a fully forested (FOR) (2·95 central North Carolina. goal this study was assess how past altered hydrology offer reference for urban planning. mean discharge coefficient...
This paired watershed study tested the effects of timber harvest on water quantity and quality in North Carolina Piedmont physiographic region. Four headwater watersheds at Hill Demonstration Forest (HF1, HF2, HFW1, HFW2) two Umstead Research Farm (UF1 UF2) were continuously monitored for discharge from 2007 to 2013. The HF1 UF1 clearcut (treatment), leaving a 15.2-m vegetated riparian buffer around streams protect as described Neuse River Basin Riparian Buffer Rule. HF2 UF2 uncut used...
The declining health of high-elevation red spruce (Picea rubens Sarg.) and Fraser fir (Abies fraseri (Pursh) Poir.) in the southern Appalachian region has long been linked to nitrogen (N) deposition. Recently, N deposition also proposed as a source negative impacts lower elevation deciduous forests. In 1998 we established 46 plots on six sites North Carolina Virginia dominated by American beech (Fagus grandifolia Ehrh.), sugar maple (Acer saccharum Marsh.), yellow birch (Betula...
Abstract Assessment of potential climate change impacts on stream water temperature ( T s ) across large scales remains challenging for resource managers because energy exchange processes between the atmosphere and environment are complex uncertain, few long‐term datasets available to evaluate changes over time. In this study, we demonstrate how simple monthly linear regression models based short‐term historical observations readily interpolated air a estimates can be used rapid assessment...
ABSTRACT Modern agriculture uses large amounts of organic and inorganic nutrients to optimize productivity. Excessive nutrient applications sometime lead adverse effects on the environment human health. Precision is evolving with objectives minimizing these by enabling farmers manage more efficiently while sustaining precious environmental resources. To develop a method that cotton, field experiment involving three sources rates nitrogen without nitrification inhibitor was carried out in...
Abstract. Plant transpiration links physiological responses of vegetation to water supply and demand with hydrological, energy carbon budgets at the land-atmosphere interface. However, despite being main land evaporative flux global scale, its response environmental drivers are currently not well constrained by observations. Here we introduce first compilation whole-plant data from sap flow measurements (SAPFLUXNET, https://sapfluxnet.creaf.cat/). We harmonised quality-controlled individual...
Boggs, Johnny, Ge Sun, David Jones, and Steven G. McNulty, 2012. Effect of Soils on Water Quantity Quality in Piedmont Forested Headwater Watersheds North Carolina. Journal the American Resources Association (JAWRA) 1‐19. DOI: 10.1111/jawr.12001 Abstract: quantity quality data were compared from six headwater watersheds two distinct soil formations, Carolina Slate Belt (CSB) Triassic Basins (TB). CSB soils are generally thicker, less erodible, contain clay content than found TB. TB generated...
Abstract Measuring water use in co‐occurring loblolly pine ( Pinus taeda L.) and shortleaf echinata Mill.) enhances our understanding of their competitive aids refining watershed budget model parameters. This study was conducted a 12‐ha forested headwater catchment the Piedmont North Carolina, southeastern U.S., from 2018 to 2019 (pre‐thinning) 2020 (post‐thinning). Sap flux density J s ), species‐level transpiration T watershed‐level w ) were quantified. Water efficiency (WUE) pines...
Abstract Our objectives are (1) to compare tree sap flux density ( J s in g cm −2 d −1 ) and stomatal conductance G mmol m across five dominant species, red maple Acer rubrum ), sweetgum Liquidambar styraciflua tulip poplar Liriodendron tulipifera loblolly pine Pinus taeda oak species Quercus spp.), (2) quantity riparian buffer stand transpiration E mm (3) link of residual trees stream discharge. In June 2010, the above were instrumented with flow sensors a pair (HF1 HF2) 12 hectare gauged...
Abstract In the Piedmont of North Carolina, a traditionally water‐rich region, reservoirs that serve over 1 million people are under increasing pressure due to naturally occurring droughts and land development. Innovative development approaches aim maintain hydrologic conditions undisturbed landscape, but based on insufficient target information. This study uses landscape concept evaluate reference hydrology in small headwater catchments surrounding Falls Lake, reservoir serving Raleigh...
Abstract There are twenty experimental forest and range sites (EFRs) across the southeastern United States that currently maintained by USDA Forest Service (Forest Service) to conduct ecosystem research for addressing management challenges. The overall objective of this study was use multiple gridded datasets assess extent which EFRs represent climate, structure, functions forests. large variability climate conditions region relatively well, but we identified small representation gaps....