CWT-LTER Data Set Summary

Accession: 4031 CWT Research Theme: Plant Ecology
Contributor: Barton D. Clinton
Title: Pre and post-burn forest floor survey of Jacobs Branch and Devils Den burn sites, 1990-1992
Abstract: Changes in aboveground and forest floor mass, carbon (C), and nitrogen (N) pools were quantified on three sites in the southern Appalachians 2 yr after felling and burning. Before felling and burning, stands were characterized by sparse overstories and dense Kalmia latifolia L. understories. Two years after burning, foliar C and N pools had reached 25% and 29% of pretreatment levels, respectively. Foliar N concentrations were not different from pretreatment values. Standing wood C and N pools were 1% and 2%, respectively, of pretreatment values. Wood N concentrations were significantly higher on two sites, likely related to differences in fire intensity. Forest floor N content 2 yr after burning was 90% of pretreatment levels, most contained in unconsumed large woody material. Forest floor mass was significantly lower in the Oi layer and unchanged in the Oe + Oa layers. Forest floor N concentrations were generally lower after treatment. The site with the least intense fire and the lowest mass loss from the forest floor had the highest forest floor, foliage, and wood N concentrations 2 yr after burning. Site recovery after felling and burning was a function of fire severity and the capacity for site-nutrient retention through plant uptake.
Key Words: burning, carbon, Coweeta Hydrologic Laboratory, Coweeta LTER, CWT, Devil’s Den, ecosystem response, fell and burn, fire, forest structure and function, forest succession, humus, Jacob’s Branch, litter, litter chemistry, LTER, Man and Biosphere Program, nitrogen, North Carolina, Otto, pine restoration, plant ecology, prescribed burning, regeneration, restoration, silviculture, site preparation, Southern Appalachian Forest Ecosystems Project, southern Appalachians, uneven sampling interval, US Forest Service-funded, USDA Forest Service
LTER Core Area: Disturbance Patterns
CWT Themes: Plant Ecology, Disturbance and Land Use, Ecosystem Ecology
Study Type: Coweeta Terrestrial Study
Study Period: 01-Jan-1990 to 30-Dec-1992
Site References:
SOUTHERNAP -- Southern Appalachia, Parts of Georgia, North Carolina, South Carolina, Tennessee, and Virginia
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Data Table: 4031 (Main data table for data set 4031, 45)

Access: Public (released 01-Feb-2004)

Metadata: Text (ESA FLED), Basic EML, Complete EML

Data Formats: Spreadsheet CSV Text Format, EML-described Text Format, Tab-delimited Text Report with Statistical Summary, GCE Data Toolbox Format, Standard MATLAB Variables Format

Column List:

Column Name Units Type Description (hide)
1 Site none integer Coded variable for sampling site
2 Plot none integer Sampling plot number
3 Time_respect_to_burn_event none integer Coded variable for time of sampling with respect to the burn event
4 Litter_mass kg/ha floating-point Litter mass in kilograms per hectare
5 Litter_nitrogen_concentration_percent % floating-point Litter nitrogen concentration in percent
6 Total_litter_nitrogen kg/ha floating-point Total litter nitrogen in kilograms per hectare
7 Litter_carbon_concentration_percent % floating-point Litter carbon concentration in percent
8 Total_litter_carbon kg/ha floating-point Total litter carbon in kilograms per hectare
9 Humus_mass kg/ha floating-point Humus mass in kilograms per hectare
10 Humus_nitrogen_concentration_percent % floating-point Humus nitrogen concentration in percent
11 Total_humus_nitrogen kg/ha floating-point Total humus nitrogen in kilograms per hectare
12 Humus_carbon_concentration_percent % floating-point Humus carbon concentration in percent
13 Total_humus_carbon kg/ha floating-point Total humus carbon in kilograms per hectare