|
Study Number: |
1012 |
|---|---|
|
Project Title: |
Gradient throughfall (thrufall) collection. |
|
Investigator(s): |
Wayne Swank E-Mail | Tel. 828.524.2128 | Biographical Sketch |
| Affiliated Institution(s): | USDA Forest Service |
| Address: |
Coweeta Hydrologic
Laboratory 3160 Coweeta Lab Road Otto, North Carolina 28763 USA |
| Study Type: | Terrestrial |
| Project Type: | Coweeta Core Research |
| Study Period: |
07/1992 - 11/1997 |
| Status/Notes: | |
| Funding Source(s): |
National Science Foundation, DEB-9632854 (Text Version) and DEB-0218001 (Text Version) to Coweeta LTER. |
| Abstract: |
To investigate long term
forest ecosystem responses to disturbance and stress along an
elevational gradient, five plots were established as follows: xeric
oak-pine (782 m), cove hardwood (795 m), low elevation mixed oak (865
m), high elevation mixed oak (1001 m), and northern hardwoods (1347 m).
Phenomena being studied in these plots include: climatology, nutrient
dynamics, decomposition, vegetation productivity and population
dynamics, and below-ground processes. As part of study on nutrient
dynamics, throughfall was sampled weekly and concentrations and fluxes
were examined from each of the five gradient plots. Resources
for students about terms used
in this study:Throughfall - Source: PhysicalGeography.net Ecosystem stress - Source: National Centers for Coastal Ocean Science |
| Location(s), Described: |
Watershed 18 and
Watershed 27. See Project Summary Sheet 1048 and Terrestrial Gradient Sites: Characteristics (photographs) for detailed information about plot locations and physical descriptions, respectively. |
| Location(s), Download GPS: | ArcView Shape Files (shp.): UTM, NAD83, Zone 17 | Lat/Lon |
| Location(s), Online Map(s): |
 USGS Topographic-based Maps of Research Sites(Printable for fieldwork) |
| Methods/Experimental Design: | Throughfall is sampled from 6 collectors at each gradient site, totaling 30 samplers. Samplers consist of a V-shaped aluminum trough 2m long by 15cm wide with a spout nipple at one end. The trough is covered with aluminum insect screen to keep out leaf litter and insects and is installed on iron supports at a slight tilt from level to improve sample flow. Tygon tubing 1.59cm inside diameter (5/8 inches) is connected to the spout nipple and extends through the cap of a 20 liter collection jug. |
| Sampling Frequency: | Gradient throughfall is sampled weekly except during periods of negligible precipitation or extended freezing conditions. |
| Data Columns: |
Collector - Site number + Collector ID Site - Site number (See Locations, Described above) Collector2 - Collector ID Year - Year Day - Day Month - Month Depth - Depth of water collected Comments - Comments on the measurements Missing Data Codes: . (Period) |
| Publications: |
Representative publications and research data from investigator(s) of this study: |
| Data Restrictions: | Users must adhere to the Coweeta LTER Data Policy. |
| Metadata: | EML Format (XML Schema) | Information about EML |
| Data Downloads: |
Microsoft® Excel (.xls) Text Comma Delimited (.csv) DBase (.dbf) |