Study Number: 

1028

Project Title:

Canopy gradient throughfall.

Investigator(s):

Barbara C. Reynolds  E-Mail | Tel. 706.542.1837 | Biographical Sketch
 Mark D. Hunter  Biographical Sketch  (Retired)
Affiliated Institution(s): University of North Carolina - Asheville (Reynolds)
University of Georgia (Hunter)
Address: Department of Environmental Studies
University of North Carolina - Asheville
Asheville, North Carolina 28804 USA

Institute of Ecology
University of Georgia
Athens, Georgia 30602  USA
Study Category: Terrestrial
Project Type: Coweeta Core Research
Study Period:

05/1996 - 11/1997
Data Type:

Type 1
Funding Source(s):

National Science Foundation, DEB-9632854 (Text Version) and DEB-0218001 (Text Version) to Coweeta LTER.
Abstract: Throughfall (precipitation that falls through the canopy) was collected on three sites across an elevation gradient at Coweeta. For more information see Reynolds and Hunter, 2001 in Publications section below.


 Resources for students about terms used in this study:
Throughfall - Source: PhysicalGeography.net
Location(s), Described: Watershed 18, Canopy site 218; Watershed 27, Canopy sites 427 and 527 (photographs)).

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 was collected in 26.0 cm diameter funnels connected by plastic tubing to 5-gallon plastic buckets. The funnels had plastic screen circles, 75 mm in diameter, with openings of 2.0 X 3.0 mm in their throats. Although the main purpose of the screens was to keep leaves and other detritus out of the throughfall, the mesh size was small enough to exclude most frass. Throughfall, collected weekly when precipitation exceeded 0.1 inch, was combined on a monthly basis. Throughfall collectors were placed in 20 randomly selected plots at each site. Throughfall was analyzed for NO3-N on an Alpkem Flow-Injection Analyzer. See Reynolds et al, 2000 in Publications section below.
Sampling Frequency: Weekly during the growing season.
Data Columns: Watershed + Site Number - see Locations, Described above.
NO3 - nitrate; milligrams per Liter (mg/L)
NH4 - ammonium; milligrams per Liter (mg/L)
PO4 - phosphate; milligrams per Liter (mg/L)

All were determined colorimetrically by an Alpkem Flow Injection Analyzer
Publications:

Hunter, Mark D., Catherine R. Linnen, and Barbara C. Reynolds. 2003. Effects of endemic densities of canopy herbivores on nutrient dynamics along a gradient in elevation in the southern Appalachians. Pedobiologia, 47: 231-244.

Hunter, Mark D. 2001. Insect population dynamics meets ecosystem ecology: effects of herbivory on soil nutrient dynamics. Agricultural and Forest Entomology, 3: 77-84.

Reynolds, Barbara, C. and Mark Hunter. 2001. Responses of soil respiration, soil nutrients, and litter decomposition to inputs from canopy herbivores. Soil Biology & Biochemistry, 33: 1641-6152.

 Reynolds, Barbara, C., Mark D. Hunter, and D.A. Crossley, Jr. 2000. Effects of Canopy Herbivory On Nutrient Cycling In A Northern Hardwood Forest In Western North Carolina. Selbyana, 21(1.2): 74-78.

Additional publications and research data from investigator(s) of this study:
Reynolds - Global search
 Hunter - Global search
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)