[Parameters: Topic='BIOSPHERE', Term='VEGETATION', Variable_Level_1='BIOMASS']
NPP TEMPERATE FOREST: GREAT SMOKY MOUNTAINS, TENNESSEE, U.S.A., 1978-1992Entry ID: npp_gsm
Abstract: Productivity of old, unlogged stands of southern Appalachian cove forest was studied and compared to young stands. Tree growth increments and allometric relationships were the basis for estimation of NPP. Measurements of tree diameter at 1.37 m above ground were made at the beginning the study. Radial increment cores were taken from a subset of trees. Above-ground net primary production (ANPP) was ... estimated using regional species-specific allometric relationships for tree mass. Estimation procedures were outlined by Busing et al. (1993).Old stands of mixed deciduous (and mixed deciduous-Tsuga) were selected for their gentle terrain, accessibility and history of study. From 1988 to 1992, seven old-growth stands were sampled with plots (0.6-1.0 ha each). The total area of old-growth forest sampled was 5.4 ha. Radial increments over the previous decade were used to provide estimates of tree diameter growth. Young stands, dominated by the deciduous species Liriodendron tulipifera, provided comparative information.The climate is perhumid mesothermal with seasonal temperature variation, but precipitation is distributed throughout the year. The Gatlinburg SW, Tennessee station mean annual temperature is 13.2 degrees centigrade. Mean annual precipitation is 141 cm. Detailed long-term climate data for this station are available from the Southeast Regional Climate Center (http://www.dnr.state.sc.us/climate/sercc/). The Gatlinburg SW station is at 445 m asl, whereas the study sites are at elevations from 720 to 1140 m. The Alum Cave Bluffs Parking Area station at 1173 m asl is more representative of the study sites, but long-term data are not readily available. Shanks (1954), Stephens (1969), and Busing et al. (2005) have documented the 1947-1950 data from this station (http://water.usgs.gov/pubs/ds/2005/115/). Mean annual temperature is 9.9 degrees centigrade. Mean annual precipitation is 200 cm. Estimates of annual ANPP for stands of various ages ranged from 6 to 13 Mg/ha. Stand biomass of the old stands was high for temperate deciduous forests (>300 Mg/ha above ground); however, ANPP was average (6-10 Mg/ha/yr) and tended to be lower than that of young stands (12-13 Mg/ha/yr) on similar sites.
(Click for Interactive Map)
Data Set Citation
Dataset Originator/Creator: BUSING, R.T.
Dataset Title: NPP TEMPERATE FOREST: GREAT SMOKY MOUNTAINS, TENNESSEE, U.S.A., 1978-1992
Dataset Release Date: 2005
Dataset Release Place: Oak Ridge, Tennessee, U.S.A.
Dataset Publisher: Oak Ridge National Laboratory Distributed Active Archive Center
Data Presentation Form: Online Files
Dataset DOI: doi:10.3334/ORNLDAAC/804Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=804&term2attribut...
Start Date: 1978-01-01Stop Date: 1992-12-31
ISO Topic Category
Data Set Progress
Role: TECHNICAL CONTACT
Email: rbusing at usgs.gov
USGS 200 SW 35th St
Province or State: OR
Postal Code: 97333
Role: DIF AUTHOR
Phone: (865) 574-7447
Email: uso at daac.ornl.gov
ORNL DAAC User Services Office Oak Ridge National Laboratory
City: Oak Ridge
Province or State: TN
Postal Code: 37831-6407
Extended Metadata Properties
(Click to view more)
Creation and Review Dates
DIF Creation Date: 2005-09-08
Last DIF Revision Date: 2012-05-17