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Investigation:

CD-15 (Cohen / Costa)

LBA Dataset ID:

CD15_PRODUCTIVITY

Originator(s):

1. COSTA, M.H.
      2. COHEN, W.B.

Point(s) of Contact:

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

Dataset Abstract:

Monitoring and modelling the local and global effects of climate changes on the ecology of the Amazon rainforest is clearly essential for the development of effective mitigation and adaptation strategies and for effective forest management. It is equally clear that realistic climate models crucially depend on accurate data on vegetation dynamics and should ideally include information on several biophysical variables of the vegetation. One of the greatest barriers to the development of truly predictive simulations is the difficulty in obtaining detailed and realistic information on parameters such as plant cover, growth rate, biomass, etc. This gap in information is especially apparent in the Amazon rainforest where issues of scale and the technical challenge of estimating a complex interrelated suite of ecological metrics have hampered the development of sufficiently sophisticated assessment and monitoring programmes. This dataset of field measurements of above-ground productivity, LAI and litterfall productivity was done as a component of the Bigfoot project which compared field measurements to remote sensing data for a variety of biomes.

Beginning Date:

2003-12-10

Ending Date:

2004-12-03

Metadata Last Updated on:

2013-06-17

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-15 LAI and Productivity Data, km 67, Tapajos National Forest: 2003-2004 :  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1167

Documentation/Other Supporting Documents:

LBA-ECO CD-15 LAI and Productivity Data, km 67, Tapajos National Forest: 2003-2004 :  http://daac.ornl.gov/LBA/guides/CD15_Productivity.html

Citation Information - Other Details:

Costa, M.H. and W. Cohen. 2013. LBA-ECO CD-15 LAI and Productivity Data, km 67, Tapajos National Forest: 2003-2004. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. http://dx.doi.org/10.3334/ORNLDAAC/1167

Keywords - Theme:

Parameter Topic Term Source Sensor
BIOMASS BIOSPHERE TERRESTRIAL ECOSYSTEMS FIELD INVESTIGATION WEIGHING BALANCE
BIOMASS BIOSPHERE TERRESTRIAL ECOSYSTEMS FIELD INVESTIGATION STEEL MEASURING TAPE
BIOMASS BIOSPHERE TERRESTRIAL ECOSYSTEMS FIELD INVESTIGATION DENDROMETERS
CANOPY CHARACTERISTICS BIOSPHERE TERRESTRIAL ECOSYSTEMS FIELD INVESTIGATION LICOR PLANT CANOPY ANALYZER

Uncontrolled Theme Keyword(s):  DENDROMETERS, LAI, LEAF LITTERFALL

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):

Cohen WB, Maiersperger TK, Turner DP, Ritts WD, Pflugmacher D, Kennedy RE, Kirschbaum A, Running SW, Costa M, Gower ST. (2006) MODIS land cover and LAI collection 4 product quality across nine sites in the western hemisphere. Ieee Transactions on Geoscience and Remote Sensing, 44, 1843-1857

Turner DP, Ritts WD, Cohen WB, Gower ST, Running SW, Zhao MS, Costa MH, Kirschbaum AA, Ham JM, Saleska SR, Ahl DE. (2006) Evaluation of MODIS NPP and GPP products across multiple biomes. Remote Sensing of Environment, 102, 282-292

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

Data are presented in three comma-separated ASCII files:

File #1: CD15_Litterfall_2003_2004.csv

File #2: CD15_LAI_2004.csv

File #3: CD15_Dendrometer_measurements_2003_2004.csv



Files are organized as follows:



File #1

Filename: CD15_Litterfall_km67_2004.csv,,,

File date: 08-October-2008 ,,,

LBA Data Set ID: CD15_Productivity,,,

,,,

Column Number,Variable Name,Units/format,Variable description

1,Sample_date,YYYYMMDD,Sample Date

2,Plot,,Plot ID: 1-50

3,Subplot,,Subplot ID: 1-5

4,Mass_litterfall,g,Weight of dry leaves in grams (g) per litter basket: each litter basket had a surface area of 0.25 meters squared



Sample data for File #1:

Sample_date,Plot,Subplot,Mass_litterfall

20040123,1,1,6.8

20040223,1,1,5.6

20040323,1,1,7.7

20040426,1,1,11.3

20040524,1,1,5.1

20040626,1,1,9.3

20040726,1,1,13.4

20040826,1,1,12.9

20040926,1,1,11.8

...

20040726,50,5,20.8

20040826,50,5,26.7

20040926,50,5,17.8

20041026,50,5,12

20041126,50,5,7.2

20041203,50,5,8.1



File #2

File name,CD15_LAI_2004.csv,,,,,,,

File date,14-Mar-13,,,,,,,

Associated LME file,CD15_Productivity,,,,,,,

Data contact,Al Kirschbaum (alan.kirschbaum@oregonstate.edu),,,,,,,

,,,,,,,,

Column,Column_heading,Units/format,Explanation,,,,,

1,Plot,,Plot identification,,,,,

2,Year,,Year of sampling,,,,,

3,Month,,Month in which measurements were made,,,,,

4,Day,,Day of the month on which measurements were made,,,,,

5,N,,Number of point measurements (one per subplot) used in plot average,,,,,

6,LAI,m2 per m2,Mean leaf area index measured with a LI-COR LAI 2000 and reported in meters squared per meter squared,,,,,

7,fpar,,Mean fraction of absorbed photosythetic active radiation (fpar) calculated using the 'difn' output from the LAI 2000,,,,,

8,lai_se,m2 per m2,Standard error of the leaf area index reported in meter squared per meter squared,,,,,

9,fpar_se,,Standard error of the mean fpar value,,,,,



Sample data for File #2:

Plot,Year,Month,Day,N,LAI,fpar,lai_se,fpar_se

1,2004,JAN,26,5,6.53,0.99,0.21,0.00

2,2004,JAN,26,5,6.27,1.00,0.14,0.00

3,2004,JAN,26,5,6.30,0.99,0.44,0.01

4,2004,JAN,26,5,6.52,0.99,0.35,0.00

5,2004,JAN,26,5,5.77,0.99,0.26,0.00

6,2004,JAN,26,5,5.42,0.98,0.26,0.01

7,2004,JAN,26,5,6.71,0.99,0.22,0.00

8,2004,JAN,26,5,6.47,1.00,0.08,0.00

...

45,2004,NOV,3,5,6.876,0.995,0.174,0.001

46,2004,NOV,3,5,6.156,0.990,0.416,0.004

47,2004,NOV,3,5,6.318,0.990,0.348,0.004

48,2004,NOV,3,5,6.168,0.993,0.216,0.002

49,2004,NOV,3,5,5.362,0.970,0.533,0.010

50,2004,NOV,3,5,5.526,0.986,0.415,0.003





File #3

File name:,CD15_Dendrometry_measurements_2003_2004.csv,,,,,,,,,,,,,,,

File date:,13-Mar-13,,,,,,,,,,,,,,,

Associated LME file,CD15_Productivity,,,,,,,,,,,,,,,

,,,,,,,,,,,,,,,,

Column,Column_heading,Units/format,Explanation,,,,,,,,,,,,,

1,Plot,,Plot identification: each 25 by 25 meter plot was given a unique identification number,,,,,,,,,,,,,

2,Subplot,,Subplot identification: each plot was divided into 5 subplotw,,,,,,,,,,,,,

3,Tree_no,,Tree identification,,,,,,,,,,,,,

4,Diameter ,cm,Diameter at breast height at the beginning of the study,,,,,,,,,,,,,

5,Band_122003,mm,Dendrometer band measurement in December 2003 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

6,Band_012004,mm,Dendrometer band measurement in January 2004 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

7,Band_022004,mm,Dendrometer band measurement in February 2004 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

8,Band_032004,mm,Dendrometer band measurement in March 2004 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

9,Band_042004,mm,Dendrometer band measurement in April 2004 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

10,Band_052004,mm,Dendrometer band measurement in May 2004 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

11,Band_062004,mm,Dendrometer band measurement in June 2004 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

12,Band_072004,mm,Dendrometer band measurement in July 2004 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

13,Band_082004,mm,Dendrometer band measurement in August 2004 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

14,Band_102004,mm,Dendrometer band measurement in October 2004 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

15,Band_112004,mm,Dendrometer band measurement in November 2004 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

16,Band_final,mm,Final dendrometer band measurement done on November 30 or December 1 or December 3 2004 reported in millimeters (mm). For actual measurement date see accompanying file.,,,,,,,,,,,,,

17,Comments,,Notations from the field notebooks ,,,,,,

,missing data is represented by -9999,,,,,,,,,



Sample data for File #3:

Plot,Subplot,Tree_no,Diameter ,Band_122003,Band_012004,Band_022004,Band_032004,Band_042004,Band_052004,Band_062004,Band_072004,Band_082004,Band_102004,Band_112004,Band_final,Comments

1,1,1,80.5,-9999,37.2,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,48.4,ladder

1,1,2,63.9,11.6,12.3,12.2,12.4,12.7,12.5,12.5,10.2,12.7,12.6,12.7,13.2,-9999

1,1,3,24.2,28.5,35,38.7,39.4,41.7,43.9,44.1,47.1,49,51.9,54.6,56.5,-9999

1,1,4,18.6,27.2,29.3,30.5,30.2,31.1,31.5,31.3,31.8,33,34.5,36.7,36.8,-9999

1,1,5,24.3,23.2,23.6,23.3,23.3,24.1,22.3,22,23.2,24.5,23.4,24.2,24.1,-9999

1,1,6,19.7,14.8,16,16.8,16.4,17.2,15.9,26.7,16.7,16.8,16.8,16.6,19,-9999

1,1,7,20,21.7,22.1,23.4,27.7,27.4,23.4,24.6,24,25,26.2,27.3,27.2,-9999

...

50,4,777,23.3,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,marked as dead in December 2003

50,4,765,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999

50,4,766,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999,-9999

50,5,778,30,16.8,16.9,17.2,17,17.1,17.8,17.8,17.6,17.2,17.3,17.6,17.7,-9999

50,5,779,20.3,19.5,19.5,20.3,19.1,19.9,19.6,20.6,20.6,20.3,20,19.7,18.9,-9999

50,5,780,26.7,31.6,32.1,33.1,33.1,33.4,33.6,33.4,33.8,35.2,38.1,39.5,39.4,-9999

Data Application and Derivation:

These data were collected as part of the Bigfoot Project which used field data and eddy flux meaurements to validate remote sensing estimates of gross and net primary productivity across a number of biomes.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

Concerns about dendrometer data are noted in the data file (e.g. band ruptured or replaced).

Process Description:

Data Acquisition Materials and Methods:

Site:

All measurements were taken at the experimental site known as km 67 of the Large-Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) Project, located in the Tapajos National Forest. This site is situated in an area of Amazonian primary tropical forest belonging to the municipality of Belterra, Para state, Brazil. The forest is mostly evergreen with a few deciduous species. The canopy is characterized by large emergent trees up to 55m tall, with a closed canopy at

approximately 40 m; there are few indications of recent anthropogenic disturbance other than hunting trails. Abundant tree species include the tauari (Couratari guianensis),matamata (Eschweilera sp.), massaranduba (Manilkara huberi), andiroba (Carapa guianensis), tachi (Sclerolobium paniculatum), abiu (Pouteria sp.), breu (Protium decandro), and louro (Licaria guianensis). Soils are nutrient-poor clay oxisols with low organic content. The monthly incident

photosynthetically active radiation (PAR) values vary from 640 to 850 mmol per m2 per s (Senna et al., 2005). The annual mean precipitation is 1911 mm, the mean temperature is 25 degrees C, and the dry season extends from July to November (Juarez et al., 2009).



We established 50 plots around the micrometeorological site of the LBA

Experiment in Amazonia (see supporting information) Each plot measured 25 by 25 meters and was divided into 5 subplots.



Litterfall productivity: We estimated new foliage production from annual leaf litterfall detritus production Litterfall measurements were taken by 250 litter baskets (0.25 m2 surface area each) installed in each subplot. Leaf litter was collected every month and the leaves were separated, dried in an oven for

24 h, and then weighed. Branches, fruits and seeds were discarded. The exact date of each collection is recorded in the data file.



Leaf area index (LAI): LAI measurements were taken using three LAI-2000 Plant Canopy Analysers (Li-Cor, 1992). This technique is referred to as the indirect non-contact method and represents the projected area of leaves taking into account individual leaf inclinations (Scurlock et al., 2001). One of the instruments was installed on the top of a tower to measure the diffuse radiation on the top of the canopy, while the other two measured diffuse radiation at about 1 m high. The Plant Canopy Analyser measures diffuse radiation with a light sensor, in the 320 to 490 nm range, where the radiation scattering by leaves is minimal. LI-COR software was used to determine the canopy transmittance and the LAI (m2 leaf area per m2 ground area) per subplot using an instrument specific formulation. The fraction of photosynthetically active radiation (fPAR) was estimated from the DIFN variable provided by the Li-Cor LAI-2000 Plant Canopy Analyzer (Gower et al. 1999). LAI measurements were collected 9 times over the course of one calendar year.



Dendrometers: Woody biomass increment was determined from radial growth,

measured using rust-resistant dendrometer bands (Walker and Whiteaker 1988) to measure annual diameter growth. Dendrometer measurements were read monthly between December 2003 and November 2004. Actual dates for each reading are included in the accompanying documentation. The number of tree species and size classes were determined during the 2001 reconnaissance trip.

References:

Gower, S.T., Kucharik, C.J., and J.M. Norman. 1999. Direct and indirect estimation of leaf area index, fAPAR and net primary production of terrestrial ecosystems. Remote Sensing of Environment 70:29-51



Juarez, R.I.N., Rocha, H.R., Figueira, A.M.S., Goulden, M.L., Miller, S.D., 2009. An improved estimate of leaf area index based on the histogram analysis of

hemispherical photographs. Agricultural and Forest Meteorology 149, 920�928.



Scurlock, J.M.O., Asner, G.P., Gower, S.T. 2001. Global Leaf Area Index Data from Field Measurements, 1932-2000. Available online [http://daac.ornl.gov/] from the ORNL Distributed Active Archive Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee, U.S.A.



Senna, M.C.A., Costa, M.H., Shimabukuro, Y.E., 2005. Fraction of photosynthetically active radiation absorbed by Amazon tropical forest: a comparison of field measurements, modeling, and remote sensing. Journal of Geophysical Research 110, G01008.



Walker, L. R., and L. D. Whiteaker. 1988. Rust prevention on dendrometer bands. Biotropica 20:336-337.

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