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Investigation:

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

LBA Dataset ID:

CD10_DBH_TAPAJOS

Originator(s):

1. WOFSY, S.C.
2. SALESKA, S.R.
      3. PYLE, E.H.
4. HUTYRA, L.R.

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 comma separated text file which reports diameter at breast height (DBH) measurements 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 were made periodically from July 1999 through August 2005. Trees with DBH >35cm were measured for ~2600 trees in four 5ha transects. Trees >10cm were measured in a smaller area (Rice et al., 2004). Measurements were made in 1999, 2001, and 2005. Trees are identified by local common names. A cross reference to scientific names is provided as a companion file. Coarse woody debris and litter samples and measurements were collected same area. See related data sets.

Beginning Date:

1999-07-10

Ending Date:

2005-08-31

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 Tree DBH Measurements at the km 67 Tower Site, Tapajos National Forest:  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=859

Documentation/Other Supporting Documents:

LBA-ECO CD-10 Tree DBH Measurements at the km 67 Tower Site, Tapajos National Forest:  http://daac.ornl.gov/LBA/guides/CD10_DBH_Tapajos.html

Citation Information - Other Details:

Wofsy, S. C., S. R. Saleska, E. H. Pyle and L. R. Hutyra. 2007. LBA-ECO CD-10 Tree DBH Measurements at the 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/859

Keywords - Theme:

Parameter Topic Term Source Sensor
BIOMASS BIOSPHERE VEGETATION FIELD INVESTIGATION HUMAN OBSERVER

Uncontrolled Theme Keyword(s):  BIOMASS, DBH, FOREST MEASUREMENTS, KM67, TAPAJOS NATIONAL FOREST, TREE GROWTH

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.

Saleska, S.R., S.D. Miller, D.M. Matross, M.L. Goulden, S.C. Wofsy, H.R. da Rocha, P.B. de Camargo, P. Crill, B.C. Daube, H.C. de Freitas, L. Hutyra, M. Keller, V. Kirchhoff, M. Menton, J.W. Munger, E.H. Pyle, A.H. Rice, and H. Silva. (2003) Carbon in amazon forests: Unexpected seasonal fluxes and disturbance-induced losses. Science 302(5650):1554-1557.

Vieira, S., P.B. de Camargo, D. Selhorst, R. Da Silva, L. Hutyra, J.Q. Chambers, I.F. Brown, N. Higuchi, J. dos Santos, S.C. Wofsy, S.E. Trumbore, and L.A. Martinelli. (2004) Forest structure and carbon dynamics in Amazonian tropical rain forests. Oecologia 140(3):468-479.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

A single comma-delimited ASCII text file contains the following information for each individual tree:







Column = description





trans = transect 1, 2, 3, or 4



tag = Initial tag number. Stays the same unless tag falls off, disappears, or is out grown.



new_tag = If tree loses tag, and gets retagged, then new tag number appears in this column. Otherwise appears as an NA.



common_name = name assigned by matieros, in Portuguese



x = distance along the x-axis. This is the long, 1000m axis.



y = distance on y axis, or centerline, positive is towards the north, negative towards the south for Ts 1-3; for T4, positive is to the west and negative to the east.



band = a logical flag, where 1 indicates tree also had dendrometer.



dbh_99 = dbh measurements in 1999, in cm, note an NA is entered for trees that are recruited later.



dbh_01 = dbh measurements in 2001, in cm, NA could also be tree that died.



dbh_05 = dbh measurements in 2005, in cm, NA could also be tree that died.



canopy_05 = an indicator of canopy status in 2005 survey, where 1=emergent, 2= canopy, 3=subcanopy, 4= understory/suppressed.



dead_05 = logical flag, where 1 = trees that were previously alive, but dead in 2005.



dead_01 = logical flag, where 1 = trees that were previously alive, but dead in 2001.



yr_rec = logical column for what year tree was recruited.



wood_dens = wood density assigned from Chave et al. (2006) supplement compilation of wood densities.









Sample Data Record:



The DBH data are reported in one comma

separated ASCII text file, km_67_tree_surveys_99_05.csv



trans,tag,new_tag,common_name,sci_name,fam,x,y,band,dbh_99,dbh_01,dbh_05,canopy_05,dead_05,dead_01,yr_rec,wood_dens

1,1,NA,freijo branco,Cordia bicolor,Boraginaceae,25,11,0,43.3,42.6,42.7,1,0,0,0,0.48

1,2,NA,louro amarelo,Aniba,Lauraceae,26,18,0,42.3,42.5,42.8,1,0,0,0,0.59

1,3,NA,fava mapuxiqui,Balisia pedicelares,Leguminosae-Mimosoideae,54,18,0,54,56.6,60.1,1,0,0,0,0.52

1,4,NA,mandioqueira rosa,Qualea dinizii,Vochysiaceae,65,19,1,43.8,45.1,NA,NA,1,0,0,0.62

1,5,NA,mandioqueira ariana,Qualea,Vochysiaceae,73,14,0,42.3,42.2,44,1,0,0,0,0.62

...



4,9116,116,tachi vermelho,NA,NA,99,3,0,NA,NA,11.5,2,0,0,0,0.57

4,9116,116,tachi vermelho,NA,NA,99,3,0,NA,NA,11.5,2,0,0,2005,0.57

4,9117,117,envira preta,NA,NA,232,3,0,NA,NA,16.4,3,0,0,0,0.5675

4,9117,117,envira preta,NA,NA,232,3,0,NA,NA,16.4,3,0,0,2005,0.5675

4,NA,195,tachi vermelho,NA,NA,371,4.5,NA,NA,NA,12.6,3,0,0,2005,0.57



Missing Value Code is NA. NA may also have meaning as indicated in column description.

Values are Comma Separated

Data Application and Derivation:

Used to estimate total standing live biomass in forest, as well as fluxes in live biomass and compare to eddy-flux tower observations.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

Data have been proofed and corrected where necessary. Problems with these types of measurements can include instances where trees appear to grow or shrink an impossible amount; a difference likely due to transcription error in the field. This data set has been screened for such errors and they have been filled with mean values of similar trees. Contact author for more information on corrections.

Process Description:

Data Acquisition Materials and Methods:

Working with Brazilian forester, Edna Gomes Tenorio Guimaraes, we installed four permanent transects, 50m by 1000m, adjacent to the eddy-covariance

tower site. Three radial transects originate at the tower and run 1000m in the three predominant wind directions, northeast, east, and southeast. The fourth runs north-south, situated in the main footprint of the tower, intersecting the east-west transect about 300 m upwind. To permanently mark the area, stakes (PVC pipe) were installed every 50m to mark distance along the central transect line.



All live trees were measured in 4 x 50m by 1000m transects in the footprint of an eddy-flux tower. All trees with diameter at breast height (DBH) greater than 35cm were measured,tagged, and mapped on an X-Y coordinate system. Tree DBH was measured at 1.3 meters unless a buttress was present, in which case the DBH was measured just above the buttress. Small trees with DBH greater than 10cm were sub-sampled in a 10 x 1000m transect along the center line of the larger transect.



Smaller trees (between 10 and 35 cm DBH) were also identified, tagged and measured in a narrower swath, 5 m on either side of the central transect line. We used the smaller survey area for small trees due to the large number of stems in that size class. Estimates of x-y coordinates for each tree stem were recorded in terms of the distances along (x) and perpendicular to (y) each transect line. Mateiros from EMBRAPA, Erly Pedroso, and Nilson de Souza Carvalho identified trees by common name. Two student interns, Jorge Jose Pinheiro Macedo, and Ocidne Franck A. Magalhaes, were trained in basic forest mensuration techniques and data assembly and provided field assistance. In a subsequent visit in the fall of 1999, Nelson Rosa of the Museo Gueldi,

Belem collected specimens and provided botanical identifications.

References:

Jerome Chave, Helene C. Muller-Landau, Timothy R. Baker, Tomas A. Easdale, Hans ter Steege, and Campbell O. Webb. 2006. REGIONAL AND PHYLOGENETIC VARIATION OF WOOD DENSITY ACROSS 2456 NEOTROPICAL TREE SPECIES. Ecological Applications 16(6):2356-2367.



GUIMARES, Edna G. Tenario and PYLE, Elizabeth Hammond. August 1999. LEVANTAMENTO FLORESTAL DE 20 HA NA FLORESTA NACIONAL DO TAPAJOS, Experimento de Grande Escala da Biosfera-Atmosfera na Amazonia. (In Portuguese)



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.

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