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Investigation:

CD-10 (Wofsy / Kirchhoff / Camargo / A. Nobre)

LBA Dataset ID:

CD10_LITTER_TAPAJOS

Originator(s):

1. RICE, A.H.
2. HAMMOND, E.P.
3. SALESKA, S.R.
4. HUTYRA, L.R.
5. PALACE, M.W.
      6. KELLER, M.M.
7. DE CAMARGO, P.B.
8. PORTILHO, K.
9. MARQUES, D.
10. WOFSY, S.C.

Point(s) of Contact:

ORNL DAAC User Services Office Oak Ridge National Laboratory Oak Ridge, Tennessee 37 (ornldaac@ornl.gov)

Dataset Abstract:

This data set contains a single text file which reports litter type and mass in the old-growth upland forest at the km 67 Santarem, Western Para Primary Forest Tower Site. This site is in the Tapajos National Forest located in north central Brazil. Measurements extend from July 2000 through June 2005. Litter collection began in July 2000 using 40 circular, mesh screen traps (0.43 m diameter, 0.156 m2) randomly located throughout the 19.75-ha tree-survey area (Rice et al., 2004). Approximately every 14 days, litter was collected, sorted, oven dried at 60 degrees C, and weighed. The litterfall from each trap was sorted into (1) leaves, (2) fruits and flowers, (3) wood , <2 cm diameter, and (4) miscellaneous. Data values reported are the mean and standard error of the 40 mass measurements of each of the litter components and the combined total, that have been converted to the reporting units of Mg/ha/yr. These data may be updated or reprocessed from time to time, and it is the user's responsibility to insure that you have the most recent version of the data. For the latest version, please see the following web site: Harvard University, LBA Web Page (http://www-as.harvard.edu/data/lbadata.html)

Beginning Date:

2000-07-14

Ending Date:

2005-06-11

Metadata Last Updated on:

2008-06-13

Data Status:

Archived

Access Constraints:

PUBLIC

Data Center URL:

http://daac.ornl.gov/

Distribution Contact(s):

ORNL DAAC User Services Office Oak Ridge National Laboratory Oak Ridge, Tennessee 37 (ornldaac@ornl.gov)

Access Instructions:

PUBLIC

Data Access:

IMPORTANT: The LBA-ECO Project website is no longer being supported. Links to external websites may be inactive. Final data products from the LBA project can be found at the ORNL DAAC. Please follow the fair use guidelines found in the dataset documentation when using or citing LBA data.
Datafile(s):

LBA-ECO CD-10 Forest Litter Data for km 67 Tower Site, Tapajos National Forest:  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=862

Documentation/Other Supporting Documents:

LBA-ECO CD-10 Forest Litter Data for km 67 Tower Site, Tapajos National Forest:  http://daac.ornl.gov/LBA/guides/CD10_Litter_Tapajos.html

Citation Information - Other Details:

Rice, A.H., E. P. Hammond, S. R. Saleska, L. Hutyra, M. Palace, M. Keller, P. B. de Carmargo, K. Portilho, D. Marques and S. C. Wofsy. 2007. LBA-ECO CD-10 Forest Litter Data for km 67 Tower Site, Tapajos National Forest. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/862

Keywords - Theme:

Parameter Topic Term Source Sensor
LITTER CHARACTERISTICS BIOSPHERE VEGETATION FIELD INVESTIGATION ANALYSIS

Uncontrolled Theme Keyword(s):  BIOMASS, KM 67, LITTER, TAPAJOS NATIONAL FOREST

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
Pará Western (Santarém) km 67 Primary Forest Tower Site -2.85700 -2.85700 -54.95900 -54.95900

Related Publication(s):

Rice, A.H., E.H. Pyle, S.R. Saleska, L. Hutyra, M. Palace, M. Keller, P.B. de Camargo, K. Portilho, D.F. Marques, and S.C. Wofsy. 2004. Carbon balance and vegetation dynamics in an old-growth Amazonian forest. Ecological Applications 14(4):S55.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

The litter data are reported in one comma separated ASCII text file, lba_km67_litter_archive.txt. Data values reported are the mean and standard error of the 40 mass measurements of each of the litter components and the combined total, that have been converted to the reporting units of Mg/ha/yr.

Data File Documentation:





Column = Description



ldate = collection date (yyyymmdd)



jd = julian date of collection (1 = 1/1/2000)



dT = delta-T, time since last collection (in days)



leaf = leaf litter mass (Mg/ha/yr)



leaf.se = standard error on leaf litter mass measurement



fruit = fruit litter mass (Mg/ha/yr)



fruit.se = standard error on fruit litter mass measurement



wood = woody litter mass (< 2 cm) (Mg/ha/yr)



wood.se = standard error on wood litter mass measurement



misc = misc other litter mass (Mg/ha/yr)



misc.se = standard error on misc other litter mass measurement



total = total all categories (Mg/ha/yr)



total.se = standard error on total litter mass measurement





Missing value code is NA

Values are comma separated





Sample Data Record:



All of the litter data are reported in lba_km67_litter_archive.txt







YYYYMMDD,cont.DOY,dT,leaf,leaf.se,fruit,fruit.se,wood,wood.se,misc,misc.se,total,total.se



20000714,196,14,6.58,0.7,0,NA,2.31,0.72,0.79,0.3,9.68,1.01

20000728,210,14,8.32,0.77,0.09,0.03,2.22,0.47,1.63,0.71,12.27,1.39

20000811,224,14,9.76,0.83,0.09,0.05,1.78,0.42,1.44,0.36,13.21,1.41

20000825,238,14,11.53,1.21,0.05,0.03,2.57,0.54,1.96,0.57,16.14,1.7



...



20050430,1947,14,5.6,0.46,0.67,0.2,1.88,0.35,0.44,0.08,9.5,1.1

20050514,1961,14,7.29,0.89,1.86,0.47,2.8,0.56,1.14,0.16,13.13,1.35

20050527,1974,13,8.77,0.72,1.77,0.42,2.93,0.6,1.73,0.46,15.23,1.5

20050611,1989,15,6.29,0.75,0.57,0.19,1.55,0.34,0.58,0.13,9.57,1.24

Data Application and Derivation:

biometry

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

This data set is final and no updates are expected.

Process Description:

Data Acquisition Materials and Methods:

Litter collection began in July 2000 using 40 circular, mesh screen traps (0.43 m diameter, 0.15 m2) randomly located throughout the 19.75-ha tree-survey area. Every 2 weeks, litter was collected, sorted, oven dried at 60 degrees C, and weighed. The litterfall sample from each trap was sorted into (1) leaves, (2) fruits and flowers, (3) wood <2 cm diameter, and (4) miscellaneous. The data archived extend from July 14, 2000 through June 2005.



Four permanent 50 x 1000 m transects were installed adjacent to the eddy-covariance tower in July of 1999 (Fig. 1), accounting for 19.75 ha of surveyed forest. Three transects originate near the tower and run in the predominant wind directions from the tower (northeast, east, and southeast), while the fourth runs north�south, intersecting the east transect at 550 m. The long, continuous transects aim to incorporate spatial heterogeneity throughout the tower footprint, avoiding bias associated with small scattered plots that can be disproportionately influenced by emergent trees.

References:

Rice, A.H., Hammond, E.P., Saleska, S.R., Hutyra, L., Palace, M., Keller, M., de Carmargo, P.B., Portilho, K., Marques, D., Wofsy, S.C. 2004. Carbon Balance and Vegetation Dynamics in an old-growth Amazonian Forest, Ecological Applications, 14(4),s55-s71.

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