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Investigation:

CD-04 (Goulden / Rocha)

LBA Dataset ID:

LBA_LEAF_LITTER_KM83

Originator(s):

1. FIGUEIRA, A.M.S.
2. DE SOUSA, C.A.D.
3. MENTON, M.C.
4. JUAREZ, R.N.
      5. DA ROCHA, H.R.
6. MILLER, S.D.
7. GOULDEN, M.L.

Point(s) of Contact:

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

Dataset Abstract:

Above-ground litter productivity was measured in a 18 ha plot adjacent to the eddy flux tower at the logged forest tower site, km 83, Tapajos National Forest, Para, Brazil. Thirty litter baskets distributed within the grid were visited bi-weekly (Goulden et al., 2004). Oven dry mass of leaves, wood, reproductive parts and miscellaneous components of the collected litter was determined for each collection. Collections covered a pre-harvest period (Sept 2000 - July 2001) and a post- harvest period (Aug 2001-Mar 2003). There is one comma-delimited data file with this data set.

Beginning Date:

2000-09-01

Ending Date:

2003-03-10

Metadata Last Updated on:

2011-01-21

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-04 Leaf Litter Data, km 83 Tower Site, Tapajos National Forest, Brazil:  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=991

Documentation/Other Supporting Documents:

LBA-ECO CD-04 Leaf Litter Data, km 83 Tower Site, Tapajos National Forest, Brazil:  http://daac.ornl.gov/LBA/guides/CD04_Leaf_Litter.html

Citation Information - Other Details:

Figueira, A.M.S., C.A.D. de Sousa, M.C. Menton, R.N. Juarez, H.R. da Rocha, S.D. Miller, and M.L. Goulden. 2011. LBA-ECO CD-04 Leaf Litter Data, km 83 Tower Site, Tapajos National Forest, Brazil. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/991

Keywords - Theme:

Parameter Topic Term Source Sensor
BIOMASS BIOSPHERE VEGETATION FIELD INVESTIGATION WEIGHING BALANCE
LITTER CHARACTERISTICS BIOSPHERE VEGETATION FIELD INVESTIGATION WEIGHING BALANCE

Uncontrolled Theme Keyword(s):  LITTER COMPONENTS, LITTER PRODUCTIVITY, LOGGED SITE, SELECTIVE LOGGING, TAPAJOS FOREST

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
Pará Western (Santarém) km 83 Logged Forest Tower Site -3.01700 -3.01700 -54.97070 -54.97070

Related Publication(s):

Goulden, M.L., S.D. Miller, H.R. da Rocha, M.C. Menton, H.C. de Freitas, A.M.E.S. Figueira, and C.A.D. de Sousa 2004. Diel and seasonal patterns of tropical forest CO2 exchange Ecological Applications 14(4) Supplement, 2004, pp. S42-S54.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

Litter productivity at the km 83 tower site in the Tapajos National Forest was measured bi-weekly between September 2000 and March 2003 and the mean values for the collections are reported in a single comma-delimited ASCII file: CD04_km83_litter.csv .



Column Number Heading Units/format Description

1 Date yyyy/mm/dd Sample date

2 Day_cum Days since January 1, 2000

3 Wt_leaves g/m2 Mean dry weight of identifiable leaves and leaf fragment in the collected litter divided by trap area (1.0 m2)

4 Wt_wood g/m2 Mean dry weight of wood in the collected litter divided by trap area (1.0 m2)

5 Wt_reprod_tiss g/m2 Mean dry weight of identifiable fruits and flowers in the collected litter divided by trap area (1.0 m2)

6 Wt_misc g/m2 Mean dry weight of unidentifiable organic material and insects in the collected litter divided by trap area (1.0 m2)

7 Wt_litter g/m2 Mean dry weight of total litter collection divided



Example data records:



Date,Day_cum,Wt_leaves,Wt_wood,Wt_reprod_tiss,Wt_misc,Wt_litter

2000/09/26,269,54.1,19.2,6.34,6.04,85.69

2000/10/10,283,23.86,13.91,6.72,5.36,49.84

2000/10/24,297,21.74,8.51,4.58,5.03,39.86

...

2001/01/16,381,11.57,5.6,2.43,3.82,23.41

2001/01/30,395,12.8,6.17,1.42,2.2,22.58

2001/03/26,450,17.84,7.45,0.63,1.25,27.16



Data Application and Derivation:

Seasonal patterns in litter quantity and composition are essential components of C cycle models. Comparison of pre- and post-harvest data allows for the quantification of the impact of selective harvesting on canopy size and productivity.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

Data have been reviewed and no problems found.

Process Description:

Data Acquisition Materials and Methods:

This work was done at the Tapajos National Forest (TNF), a 6,000,000 ha conservation area of of humid tropical forest with a mean canopy height of 40 m. The study site is located 50 km south of Santarem, Para via an access road at km 83 of the Santarem-Cuiaba Highway. Mean annual precipitation of 1,911 mm has been recorded at a weather station in Belterra, Para 50 km from the study sites (INEMET 1992), with a dry season extending from August through November.



A 18 ha plot adjacent to the eddy flux tower at km 83, Tapajos National Forest, was established in September 2000. Thirty litter baskets were located on two E-W transects within the grid. Each litter basket measured 1 m x 1 m and was supported 0.1 m above the ground. Baskets were visited bi-weekly starting in late September 2000 and litter collections followed Newbould (1970). Litter from each basket was air-dried at the LBA laboratory in Santarem, sorted into 4 categories (leaves, wood (< 2 cm diameter), reproductive parts and miscellaneous (material that could not be identified as well as insect bodies and frass). Each sub-sample was then oven dried at 50 degrees Celsius and weighed to determine mass.

References:

Goulden, M.L., S.D. Miller, H.R. da Rocha, M.C. Menton, H.C. de Freitas, A.M.E.S. Figueira, and C.A.D. de Sousa 2004. Diel and seasonal patterns of tropical forest CO2 exchange Ecological Applications 14(4) Supplement, 2004, pp. S42-S54.



Newbould, P.J. 1970. Methods for estimating the primary production of forests. IBP Handbook No. 2. Blackwell Scientific Publications, Oxford, England. 62 p.

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