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Investigation:

LC-21 (Asner / Bustamante / Silva)

LBA Dataset ID:

LC21_Allometry_Cauaxi

Originator(s):

1. Asner, Gregory Paul
2. Bustamante, Mercedes M.C.
3. Silva, Jose Natalino Macedo
4. Buckley, Joe
5. Carvalho, Ana Paula Ferreira
6. Cruz, Guilherme Franca
7. Ferreira, Joice Nunes
8. Hare, Anna Quinn
      9. Harris III, Albert Thomas
10. Knapp, David E.
11. Lemos, Joselene Pereira
12. Olander, Lydia Pauline
13. Rocha, Cristiane Oliveira da
14. Prado, Zayra Azeredo
15. Silva, Jose Salomao Oliveira
16. Telles, Everaldo de Carvalho Conceicao

Point(s) of Contact:

Asner, Dr. Gregory P. (greg@globalecology.stanford.edu)
Knapp, David E. (deknapp@stanford.edu)

Dataset Abstract:

These data were collected at the Fazenda Cauaxi in eastern Para in July of 2000. The data include a canopy class designation for each tree (Dominant, Understory, or Super dominant. The crown bottom height, top height, and diameter at breast height (DBH) were also measured. For trees that had buttresses, the diameter was measured at 1.7 meters above the buttress. A total of 304 trees were measured.
Data Quality Statement: The Data Center has determined that this data set has missing or incomplete data, metadata, or other documentation resulting in diminished usability of this product. User beware.
Known Problems: The Excel spreadsheet provided is well organized and fields are clearly identified and labeled, however there are no coordinates provided to identify the individual tree locations within the study area.

Beginning Date:

2000-07-01

Ending Date:

2000-07-31

Metadata Last Updated on:

2011-12-29

Data Status:

Not yet in archive queue

Access Constraints:

Public

Data Center URL:

http://daac.ornl.gov

Distribution Contact(s):

ORNL DAAC User Services (uso@daac.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):

Citation Information - Other Details:

Asner, G.P., M. Palace, M. Keller, R. Pereira Jr., J.N.M. da Silva, J. Zweede. 2009. LBA-ECO LC-21 Tree Allometry Data, Fazenda Cauaxi, Para, Brazil: July 2000. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.

Keywords - Theme:

Parameter Topic Term Source Sensor
CROWN BIOSPHERE VEGETATION FIELD SURVEY LASER RANGEFINDER

Uncontrolled Theme Keyword(s):  DBH, canopy class, crown height, crown width

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
Para Eastern (Belem) Fazenda Cauaxi -3.73130 -3.73130 -48.29060 -48.29060

Related Publication(s):

Asner, Gregory P., Michael Palace, Michael Keller, Rodrigo Pereira Jr., Johan C. Zweede. 2002. Estimating Canopy Structure in an Amazon Forest from Laser Range Finder and IKONOS Satellite Observations. Biotropica 34(4): 483-492.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

Data are provided in a single comma-delimited ASCII file: LC21_Tree_Allometry_Cauaxi.csv



Data description:

These data were collected for 304 trees in the Fazenda Cauaxi in the Brazilian State of Para in July 2002.



File contents and organization:



Col. # Column heading Variable Description

1 Tree_ID Tree identification number

2 Canopy_class Canopy class: D = Dominant, U = Understory, S = Super-dominant

3 DBH Bole diameter at breast height reported in centimeters (cm);

if tree had buttress, measurement was at 1.7 meters above buttress)

4 Height_top Height in meters at top of crown

5 Height_bot Height in meters at bottom of crown

6 Crown_width Maximum crown diameter in meters



Example data records:



Tree_ID,Canopy_class,DBH,Height_top,Height_bot,Crown_width

255,D,30,26.29,20.27,8.7

258,U,25,22,18.13,7.63

265,D,24,24.4,21.93,7

274,U,23,21.19,11.93,9

276,S,140,48.44,30.56,31.16

290,U,21,17.49,13.88,5.46

295,S,99,37.09,23.25,31.4

301,U,34,21.05,16.58,6.8

305,S,131,43,32.3,31.5

Data Application and Derivation:

These data are used to study the relationships between DBH, tree height, and other canopy structural characteristics in a tropical forest in eastern Amazonia.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

These data were collected directly in the field and compared to measurements made by satellite observation.

Process Description:

Data Acquisition Materials and Methods:

Line transects of 500-meter length were spaced at 50 meter intervals crossing the study plot (N=20). Fourteen of these transects were randomly selected for surveys of DBH, tree height, and crown dimensions. DBH measurements were collected for 2171 individuals encountered with DBH > 20 cm (measured 1.3 meters above ground or above buttresses) within 10 meters to either side of each transect. For 300 elected trees, we collected additional crown dimension measurements including top-of-crown height, bottom-of-crown height, and crown width along the estimated longest axis. These data were collected in the field with a handheld laser range finder (Impulse-200LR, Laser Technology, Englewood, Colorado).

References:

Asner, Gregory P., Michael Palace, Michael Keller, Rodrigo Pereira Jr., Jose N. M. Silva, and Johan C. Zweede. 2002. Estimating Canopy Structure in an Amazon Forest from Laser Range Finder and IKONOS Satellite Observations. Biotropica 34(4): 483-492. [LBA-ECO Pub ID # 229]



Williams, M.S., W.A. Bechtold, and V.J. LaBau. 1994. Five instruments for measuring tree height: An evaluation. Southern Journal of Applied Forestry 18: 76-82.

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