[Parameters: Topic='BIOSPHERE', Term='VEGETATION', Variable_Level_1='BIOMASS']
NPP Temperate Forest: Humboldt Redwoods State Park, California, U.S.A., 1972-2001Entry ID: npp_busing_redwood
Abstract: Productivity of an old stand of coast redwoods in northern California was studied via tree remeasurement (1972-2001) and allometric relationships. Measurements of tree circumference at 1.7 m above ground were made at the beginning and the end of the study. Above-ground net primary production (ANPP) was estimated using a range of specific gravities and several allometric relationships for tree ... volume. Trees lost to mortality over the study interval were included in the analysis. Reported data include site characteristics, redwood stand descriptors, and measured and calculated biomass and ANPP data.In 1972, Dr. Fujimori placed a 120 x 120 m plot (1.44 ha) in a particularly massive stand of coast redwoods on alluvial flats near Bull Creek in Humboldt Redwoods State Park, California (40.35 degrees N, -123.00 degrees W). At more than 1000 years of age, with trees greater than 90 m tall, the stand is relatively old and well developed. The climate is characterized by moderate temperatures, wet winters, and summers with low precipitation. Summer fog contributes to moisture input. The Scotia, California station mean annual temperature is 12.6 degrees centigrade. Mean annual precipitation is 123 cm. Detailed climate data for this station are available from the Western Regional Climate Center (http://www.wrcc.dri.edu/). A 1972 stem map of the stand allowed us to identify and remeasure trees > 10 cm in diameter. A range of tree biomass and ANPP estimates was obtained. Estimation procedures were outlined by Busing & Fujimori (2005).Estimates of annual ANPP ranged from 6 to 14 Mg/ha. However, ANPP values in the range from 7 to 10 Mg/ha were considered to be the most reasonable because of the accuracy of the particular equations, specific gravities and assumptions used to obtain them (Busing & Fujimori 2005). Stand biomass was extremely high (>3000 Mg/ha above ground); however, ANPP was not extreme. Photograph: The old-growth study stand in 2001.
Data Set Citation
Dataset Originator/Creator: BUSING, R.T.FUJIMORI, T.
Dataset Title: NPP Temperate Forest: Humboldt Redwoods State Park, California, U.S.A., 1972-2001
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/803Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=803&term2attribut...
Start Date: 1972-01-01Stop Date: 2001-12-31
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
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Creation and Review Dates
DIF Creation Date: 2005-09-08
Last DIF Revision Date: 2013-09-11