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Investigation:

CD-11 (Houghton / Alencar)

LBA Dataset ID:

CD11_FOREST_DEGRADATION

Originator(s):

1. ALENCAR, A.C.
2. DE CARVALHO, O.
3. HOUGHTON, R.A.
      4. NEPSTAD, D.C.
5. HAYASHI, S.N.

Point(s) of Contact:

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

Dataset Abstract:

Biomass measurements were made in five to six 500 x 500 m plots in each of 3 study sites. At each site, plots represented different types of logging and fire treatments, each including one primary forest plot used as a control. In each of the plots five 500m transects were established 100m apart, covering an area of 25 ha per plot. In each transect all trees with more than 30 cm diameter at breast height (DBH) were measured. Dead standing trees were also measured and classified in three classes of decomposition. A 4m wide transect was used to measure individuals between 10 and 30 cm DBH. Six small subplots were set along each transect to measure regeneration individuals in the following categories: 2-10cm DBH and < 2cm DBH. For the Paragominas site, the control plot (primary forest plot) was surveyed using 3 transects of 1km each. This specific area was surveyed in 2000 for another project which evaluated the impact of fire on fauna.

Beginning Date:

2001-07-15

Ending Date:

2003-09-01

Metadata Last Updated on:

2012-09-06

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-11 Biophysical Measurements of Logged and Fire-Treated Forests, Brazil:  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1118

Documentation/Other Supporting Documents:

LBA-ECO CD-11 Biophysical Measurements of Logged and Fire-Treated Forests, Brazil:  http://daac.ornl.gov/LBA/guides/CD11_Forest_Degradation.html

Citation Information - Other Details:

Alencar, A.C., O. Carvalho Jr., R.A. Houghton, D.C. Nepstad, and S.N. Hayashi. 2012. LBA-ECO CD-11 Biophysical Measurements of Logged and Fire-Treated Forests, 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. http://dx.doi.org/10.3334/ORNLDAAC/1118

Keywords - Theme:

Parameter Topic Term Source Sensor
BIOMASS BURNING BIOSPHERE VEGETATION FIELD SURVEY HUMAN OBSERVER
FOREST COMPOSITION/VEGETATION STRUCTURE BIOSPHERE VEGETATION VEGETATION SURVEY HUMAN OBSERVER
LAND USE CLASSES BIOSPHERE VEGETATION FIELD SURVEY ANALYSIS
RECLAMATION/REVEGETATION/RESTORATION BIOSPHERE VEGETATION FIELD SURVEY CAMERAS

Uncontrolled Theme Keyword(s):  BIOMASS, DBH, TREE HEIGHT, TROPICAL FORESTS

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
  BRAZILIAN AMAZON -2.65000 -12.29000 -47.04000 -54.95000

Related Publication(s):

Alencar, A., D.C. Nepstad, M.C. Vera Diaz. 2006. Forest understory fire in the Brazilian Amazon in ENSO and non-ENSO Years: area burned and committed carbon emissions. Earth Interactions. Vol. 10. Paper 6: 1-17.

Alencar, A.C., L.A. Solorzano, and D.C. Nepstad. 2004. Modeling forest understory fires in an eastern Amazonian landscape. Ecological Applications 14(4):S139toS149.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

Data are presented in 10 ASCII comma separated files.

File #1: CD11_STM_Inventory.csv

File #2: CD11_MT_Inventory.csv

File #3: CD11_PGM_Inventory.csv

File #4: CD11_PGM_E_Inventory.csv

File #5: CD11_STM_Regeneration_0-2cm.csv

File #6: CD11_MT_Regeneration_0-2cm.csv

File #7: CD11_PGM_Regeneration_0-2cm.csv

File #8: CD11_STM_Regeneration_2-10cm.csv

File #9: CD11_MT_Regeneration_2-10cm.csv

File #10: CD11_PGM_Regeneration_2-10cm.csv



For each of the three sites there are three files with the site identified by code in the file name (Santarem-= STM, Paragominas= PGM and Mato Grosso= MT). Files labeled inventory include measurements of all stems with a dbh of 10 cm or greater. For the Paragominas primary forest site species were identified and those data are presented in their own inventory file. Measurements of stems with diameters less than 10 cm are included in the files labeled Regeneration_ 0-2cm and Regeneration_2-10cm. Area sampled varied according to stem size and is detailed in the methods section.



Data organization for Files #1-3

File name,CD11_STM_Inventory.csv,,,,,

File date,30_Jun-2010,,,,,

Associated LBA LME file,LBA-ECO CD-11 Forest Degradation by Logging and Fire, Para and Mato Grosso: 2001-2003,,,,,





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

----1,Site,,Sampling site see associated text file for more information on the sampling sites,,,

----2,Plot,,Plot identification ,,,

----3,Transect,,Transect identification,,,

----4,Section,,Transect section: each transect was divided into 20 25 x 100 meter sections. Stems greater than or equal to 30 cm diameter were inventoried throughout the full section; stems between 10 and 30 cm were inventoried in a 4 by 25 meter sub-section along the main axis of the transect.,,,

----5,Status,,Status of the stem: L =live, D=dead and Logged= stump that was logged,,,

----6,DBH,cm,Diameter at breast height (1.3 meters above ground) in centimeters (cm): for stumps resulting from logging dbh was measured at the top of the stump,,,

----7,Ht,m,Stem height in meters,,,

----8,Decomposition,,For standing dead trees state of decomposition was estimated: (1) Good condition, recently dead, (2) Medium condition, (3) Rotten, dead long time,,,

----9,Notes,,Field notes including identification of palms, vines and cecropia stems,,,



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





Sample data for Files # 1-3

Site,Plot,Transect,Section,Status,DBH,Ht,Decomposition,Notes

STM,B,1,0-25m,L,12.8,7.0,-9999,Cecropia

STM,B,1,0-25m,L,12.2,7.5,-9999,Cecropia

STM,B,1,0-25m,L,14.1,6.0,-9999,Cecropia

STM,B,1,0-25m,L,19.1,7.0,-9999,Cecropia

STM,B,1,0-25m,L,12.3,8.0,-9999,-9999

STM,B,1,0-25m,L,12.0,5.0,-9999,-9999

STM,B,1,0-25m,L,11.0,6.0,-9999,-9999

STM,B,1,0-25m,L,58.3,5.0,-9999,Palm





Data organization for File #4

File name,CD11_PGM_E_Inventory.csv,,,,,

File date,30_Jun-2010,,,,,

Associated LBA LME file,LBA-ECO CD-11 Forest Degradation by Logging and Fire, Para and Mato Grosso: 2001-2003,,,,,



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

----1,Site,,Sampling site see associated text file for more information on the sampling sites,,,

----2,Plot,,Plot identification ,,,

----3,Transect,,Transect identification,,,

----4,Status,,Status of the stem: L =live, D=dead ,,,

----5,DBH,,Diameter at breast height (1.3 meters above ground) in centimeters (cm): for stumps resulting from logging dbh was measured at the top of the stump,,,

----6,Ht,,Stem height in meters (m),,,

----7,Local_name,,Species identification to local name where possible,,,

----8,Notes,,Field notes including identification of palms, vines and cecropia stems,,,



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



Site,Plot,Transect,Status,DBH,Ht,Local_name,Notes

PGM,E,1,D,11,7,Not identified,

PGM,E,1,D,13,14.7,Not identified,-9999

PGM,E,1,D,13.5,4,Not identified,-9999

PGM,E,1,D,16.5,7,Not identified,-9999

PGM,E,1,D,18.4,5.5,Not identified,-9999

PGM,E,1,D,22.3,3,Not identified,-9999

PGM,E,1,D,30.7,10,Not identified,-9999

PGM,E,1,D,36,11.5,Not identified,-9999

PGM,E,1,D,38.1,14,Not identified,-9999

PGM,E,1,D,39,6.8,Not identified,Stump





Data organization for Files #5-7

File name,CD11_STM_Regeneration_0-2cm.csv,,,,,,,,

File date,30_Jun-2010,,,,,,,,

Associated LBA LME file,LBA-ECO CD-11 Forest Degradation by Logging and Fire, Para and Mato Grosso: 2001-2003,,,,,,,,



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

----1,Site,,Sampling site see associated text file for more information on the sampling sites,,,,,,

----2,Plot,,Plot identification ,,,,,,

----3,Transect,,Transect identification,,,,,,

----4,Section,,Transect section: each transect was divided into 20 25 x 100 meter sections,,,,,,

----5,DBH,cm,Diameter at breast height (1.3 meters above ground) in centimeters (cm),,,,,,

----6,Ht,m,Stem height in meters,,,,,,

----7,Notes,,Field notes including identification of palms, vines and cecropia stems,,,,,,

,,,,,,,,,

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



Sample data for Files #5-7

Site,Plot,Transect,Section,DBH,Ht,Notes,,,

STM,B,1,0-25m,0.70,0.18,-9999

STM,B,1,0-25m,0.20,0.08,-9999

STM,B,1,0-25m,0.30,-9999,Vine

STM,B,1,0-25m,0.70,-9999,Vine

STM,B,1,0-25m,1.70,1.30,-9999

STM,B,1,0-25m,1.40,-9999,Vine

STM,B,1,0-25m,0.80,-9999,Vine

STM,B,1,0-25m,0.80,-9999,Vine





Data organization for Files # 8-10

File name,CD11_STM_Regeneration_2-10cm.csv,,,,,

File date,30_Jun-2010,,,,,

Associated LBA LME file,LBA-ECO CD-11 Forest Degradation by Logging and Fire, Para and Mato Grosso: 2001-2003,,,,,



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

----1,Site,,Sampling site see associated text file for more information on the sampling sites,,,

----2,Plot,,Plot identification ,,,

----3,Transect,,Transect identification,,,

----4,Section,,Transect section: each transect was divided into 20 25 x 100 meter sections,,,

----5,DBH,cm,Diameter at breast height (1.3 meters above ground) in centimeters (cm),,,

----6,Ht,m,Stem height in meters,,,

----7,Notes,,Field notes including identification of palms, vines and cecropia stems,,,

,,,,,,

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



Sample data for Files # 8-10

Site,Plot,Transect,Section,DBH,Ht,Notes

STM,B,1,25-50m,4.6,2.50,-9999

STM,B,1,75-100m,2.5,2.50,-9999

STM,B,1,75-100m,2.2,2.50,-9999

STM,B,1,75-100m,2.1,2.50,-9999

STM,B,1,75-100m,2.7,1.80,-9999

STM,B,1,75-100m,2.7,2.50,-9999

STM,B,1,75-100m,3.8,3.50,-9999

Data Application and Derivation:

Biomass inventories can be used to directly estimate carbon stocks using allometric equations to convert dbh and height into biomass. The regeneration surveys allow for the estimation of population structure and with growth data permit the estimation of recovery time for the forests post-logging.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

All data have been checked and no further changes to the data are anticipated.

Estimates of total and commercial heights are considered accurate to within 1 meter. Measurements of diameter have an associated error of plus or minus 0.2 cm while the estimated diameter values have an associated error of plus or minus 1 cm. Species identifications where given were done by local mateiros in the field and botanical specimens were not sent to an herbarium for confirmation. Local names may vary from location to location so caution is urged when assigning scientific names from the local identification.

Process Description:

Data Acquisition Materials and Methods:

For each study site, the field survey was conducted in five to six 500 x 500 m plots including one for primary forest used as a control plot and the rest with different types of logging and/or fire treatments. In each plot were opened five transects 500m long and 100m apart, covering an area of 25 ha per plot. The only exception was the primary forest plot in Paragominas, which had 3 transects of 1000m. The width of each transect was 14m (7m to each side of the transect path) where all trees with more than 30 cm diameter at breast height (DBH) were measured. Dead standing trees were also measured and classified in three classes of decomposition. A 4m width transect was used to measure individuals between 10 and 30 cm DBH. Six small subplots were set along each transect to measure regeneration individuals in the following categories: 2 to 10 cm DBH and less than 2 cm DBH. All the stumps found in each of the logged forest plots had their diameter measured and were mapped using GPS to estimate the amount of wood harvested.

References:

Alencar, A., D. Nepstad, M.C. Vera Diaz. 2006. Forest understory fire in the Brazilian Amazon in ENSO and non-ENSO Years: area burned and committed carbon emissions. Earth Interactions. Vol. 10. Paper 6: 1-17.







Alencar, A.; Solorzano, L.; Nepstad, D. Modeling Forest Understory Fires in an Eastern Amazonian Landscape. Ecological Application. 14(4) Supplement, 2004, pp. S139–S149

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