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Investigation:

TG-07 (Keller / Oliveira)

LBA Dataset ID:

LBA_TG07_BBD

Originator(s):

1. KELLER, M.M.
      2. PALACE, M.W.

Point(s) of Contact:

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

Dataset Abstract:

A field inventory of trees was conducted in March of 1997 in a logging concession at the Tapajos National Forest, south of Santarem, Para, Brazil. The inventory was conducted by the foresters and technicians of the Tropical Forest Foundation (FFT) and included all trees with diameter at breast height greater than or equal to 35 cm. Four blocks of approximately 100 ha each within the 3,200 ha concession were inventoried. Within each block, parallel trails 50 m apart were established, and the location of each tree measured was recorded to the nearest meter using an orthogonal coordinate system based on these trails. Field data for each tree includes: identification number, ground position, diameter, common name, scientific name and qualitative estimates of bole and canopy quality. Data are provided in one ASCII comma separated file.
These data were used to calculate above-ground live biomass as described but biomass data are not included in this data set.

Beginning Date:

1997-03-01

Ending Date:

1997-03-31

Metadata Last Updated on:

2009-04-30

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 TG-07 Ground-based Biometry Data at km 83 Site, Tapajos National Forest: 1997:  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=923

Documentation/Other Supporting Documents:

LBA-ECO TG-07 Ground-based Biometry Data at km 83 Site, Tapajos National Forest: 1997:  http://daac.ornl.gov/LBA/guides/TG07_FFT_Survey_Km83.html

Citation Information - Other Details:

Keller, M.M. and M.W. Palace. 2009. LBA-ECO TG-07 Ground-based Biometry Data at km 83 Site, Tapajos National Forest: 1997. 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/923

Keywords - Theme:

Parameter Topic Term Source Sensor
FOREST COMPOSITION/STRUCTURE BIOSPHERE VEGETATION FIELD INVESTIGATION STEEL MEASURING TAPE

Uncontrolled Theme Keyword(s):  DBH, FFT, FOREST STRUCTURE, SPECIES

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):

Keller, M., M. Palace, and G. Hurtt. 2001. Biomass estimation in the Tapajos National Forest, Brazil - Examination of sampling and allometric uncertainties. Forest Ecology and Management 154(3):371-382. doi:10.1016/S0378-1127(01)00509-6

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

Study Area



The entrance to the study site was located at -3.067 degree (S) and -54.95 degree (W) , 83 km south of Santarem, Para, on the BR-163 (Santarem-Cuiaba) Highway. A field inventory of trees in four blocks of approximately 100 ha each within the 3,200 ha logging concession at the Tapajos National Forest. This was a one time survey conducted in March 1997 by the foresters and technicians of the Tropical Forest Foundation (FFT).



Data File



The tree inventory measurements are reported in one ASCII comma separated file, TG07_FFT_Survey_Km83_20090217.csv



Column# Column heading Units Variable Description/Comment

1 Plot logging block each block was approximately 100 ha

2 Tree number Tree ID number

3 X (m) Distance along x axis from 0,0 corner of plot

4 Y (m) Distance along y transect from plot x axis

5 xx (m) Distance of transect line

6 Real_Transect Transect number (every 50 m)

7 Subtrans Used for Monte Carlo resampling

8 Subplot Used for Monte Carlo resampling

9 Scientific_ Name Scientific name

10 Common_ Name Common name

11 Family Scientific Family

12 Class qualitative Quality Class for Commercial Species (Classes 1-10)

13 Diameter cm Diameter at breast height (DBH)

14 Basal_ Area m2 Basal Area, in mw per tree calculated from DBH

15 H m Commercial Height

16 Bole_quality qualitative Boel form/quality

17 Crown_quality qualitative Crown form

18 Vol (m3) Volume of bole calculated using the equation: pi divided by four times dbh squared times height times 0.7

19 Commercial_grade Commerical use: 1 indicates species currently considered commercial and 2 indicates species that are potentially commercial but have no market in the region at the current time

20 Observations Researcher Observations







Example Data Records:

Missing data are represented by -9999.



Header records omitted

...





plot,Tree_number,X,Y,xx,Real_Transect,subtrans,subplot,Scientific_name,Common_name,Family,Class,Diameter,Basal_Area,H,Bole_quality,

Crown_quality,volume,Commercial_grade,Observations

b18,1,43,1,43,1,1,1,Vochysia maxima,Quaruba verdadeira,Vochysiaceae,2,51,0.2,16,1,2,4.75,1,None

b18,2,26,7,26,1,1,1,Holopixydium jarana,Jarana,Lecythidaceae,1,41.5,0.13,17,2,1,3.52,1,None

b18,3,20,9,20,1,1,1,Chimarrhis turbinata,Pau de remo,Rubiaceae,4,65,0.33,12,4,2,5.66,2,None

...

b9,5867,996,6,46,20,1,1,Swartzia panacoco,Gombeira,Leg.- Papilionoideae,1,37,0.11,17,2,2,-9999,-9999,None

b9,5868,987,2,37,20,1,1,Brosimum rubescens,Amapa amargoso,Moraceae,1,42,0.14,14,3,2,-9999,-9999,None

b9,5869,987,0,37,20,1,1,Holopixydium jarana,Jarana,Lecythidaceae,2,45.5,0.16,15,1,3,-9999,-9999,None

Data Application and Derivation:

The data collected in this data set were used to estimate above ground biomass in this forest using four separate allometric equations. While allometric equations allow for plot scale biomass estimates made on the basis of existing forest inventories, most biomass and forestry plots are on the order of 1 ha. In contrast, these data represent 392 ha of sampling effort.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

We attempted to account for both sampling errors and other potential sources of uncertainty resulting in a very conservative error estimate. Sampling errors related to spatial variations in biomass were estimated from the variation of the four blocks sampled. Additive errors were summed directly where they were correlated and summed in quadrature when they were independent. Other sources of error were assumed to have a multiplicative effect. Positive and negative error bounds were calculated using the formula: (estimated biomas + sampling error) x (1 + other errors). The effect of sample area on biomass estimates was estimated using a Monte Carlo approach to subsample the entire dataset.

Process Description:

Data Acquisition Materials and Methods:

The field inventory was conducted in March 1997 by the foresters and technicians of the Tropical Forest Foundation (FFT). Four blocks of approximately 100 ha each within the 3,200 ha logging concession in the Tapajos National Forest were selected corresponding to the anticipated timing of future logging operations. Each block was surveyed with parallel transects at 50 m intervals using fiberglass measuring tape and staff compasses. All trees with diameter at breast height (1.3 m) were tagged with a unique number and measured. Diameters for buttressed trees were measured directly above the buttress. Relative ground position for each tree was recorded using an orthogonal coordinate system based on the survey transects.

References:

Keller, M., M. Palace, and G.Hurtt. 2001. Biomass estimation in the Tapajos National Forest, Brazil - Examination of sampling and allometric uncertainties. Forest Ecology and Management 154(3):371-382. doi:10.1016/S0378-1127(01)00509-6

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