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Investigation:

ND-02 (Davidson / Stone / Markewitz / Carvalho / Sa / Vieira / Moutinho / Figueiredo)

LBA Dataset ID:

LBA_ND02_THDBH

Originator(s):

1. DAVIDSON, E.A.
2. DE CARVALHO, C.J.R.
3. VIEIRA, I.C.G.
4. FIGUEIREDO, R.D.O.
5. MOUTINHO, P.R.
      6. ISHIDA, F.Y.
7. DOS SANTOS, M.T.P.
8. GUERRERO, J.B.
9. KALIF, K.
10. SABA, R.T.

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 provides tree diameters and heights measured from 1999 to 2005 in plots of a secondary-growth forest fertilization experiment located 6.5-km northwest of the town of Paragominas, Para, Brazil. In the 6-year old secondary-growth forest, all trees greater than 2 cm diameter at breast height (DBH) were tagged, identified, and measured for diameter and height in November 1999. Fertilizer was applied to selected plots in January 2000 and February 2001. Tree heights and diameters were remeasured in May 2000, June 2001, July 2002, July 2004, and July 2005. All data are provided in a single comma-separated file. The site was divided into three blocks, with four treatment plots (each 20m x 20m) located in each block (3 reps x 4 treatments = 12 plots). Three of the twelve plots were fertilized with nitrogen (100 kg N/ha as urea); three were fertilized with phosphorus (50 kg P/ha as superphosphate); three were fertilized with both nitrogen and phosphorus. The remaining three plots were not fertilized and served as the experimental control.

Beginning Date:

1999-11-01

Ending Date:

2005-07-31

Metadata Last Updated on:

2009-12-14

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 ND-02 Secondary Forest Tree Heights and Diameters, Para, Brazil: 1999-2005 :  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=951

Documentation/Other Supporting Documents:

LBA-ECO ND-02 Secondary Forest Tree Heights and Diameters, Para, Brazil: 1999-2005 :  http://daac.ornl.gov/LBA/guides/ND02_Tree_Heights_DBH.html

Citation Information - Other Details:

Davidson, E.A., C.J.R. de Carvalho, I.C.G. Vieira, R.D. Figueiredo, P. Moutinho, F.Y. Ishida, M.T.P. dos Santos, J.B. Guerrero, K. Kalif, R.T. Saba. 2009. LBA-ECO ND-02 Secondary Forest Tree Heights and Diameters, Para, Brazil: 1999-2005. 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/951

Keywords - Theme:

Parameter Topic Term Source Sensor
BIOMASS BIOSPHERE VEGETATION VEGETATION SURVEY STEEL MEASURING TAPE
FOREST COMPOSITION/VEGETATION STRUCTURE BIOSPHERE VEGETATION VEGETATION SURVEY HUMAN OBSERVER

Uncontrolled Theme Keyword(s):  BIOMASS, CAPOEIRA, NUTRIENT LIMITATIONS, PARAGOMINAS, SECONDARY FOREST, TREE DIAMETER, TREE HEIGHT

Keywords - Place (with associated coordinates):

Region
(click to view profile)
Site
(click to view profile)
North South East West
Pará Eastern (Belém) Paragominas -2.98300 -2.98300 -47.51600 -47.51600

Related Publication(s):

Davidson, E.A., C.J.R. de Carvalho, I.C.G. Vieira, R.O. Figueiredo, P.R. Moutinho, F.Y. Ishida, M.T.P. dos Santos, J.B. Guerrero, K. Kalif, and R.T. Saba. 2004. Nitrogen and phosphorus limitation of biomass growth in a tropical secondary forest. Ecological Applications 14(4):S150-S163. doi:10.1890/01-6006.

Siddique, I., I.C.G. Vieira, S. Schmidt, D. Lamb, C.J.R. Carvalho, R.D. Figueiredo, S. Blomberg, and E.A. Davidson. 2010. Nitrogen and phosphorus additions negatively affect tree species diversity in tropical forest regrowth trajectories. Ecology 91(7):2121-2131.

Data Characteristics (Entity and Attribute Overview):

Data Characteristics:

These data are provided as a single comma-delimited ASCII file: ParagominasTreeDiameterAndHeight_1999-2005.csv

Each row contains all data measured for an individual tree over the course of the sampling period for a measurement event. See the notes below regarding data records for the recruitment of new stems into the >2cm diameter class and for tree mortality.



File Contents / Variable Descriptions:

Column Number Heading Description

1 Treatment Fertilizer treatment: Control, Nitrogen, Phosphorus, Nitrogen+Phosphorus (designated as Nitr + Phos)

2 Block Block number within Treatment (B1, B2, B3)

3 Plot Plot number within Block (P1, P2, P3, P4)

4 Tree_ID Individual tree ID number within each Plot

5 Species Species name

6 Sample_ID Sample ID: Treatment + Block + Plot + Tree_ID fields concatenated to create a unique sample identifier

7 Measurement_Period Measurement Period (Mon-YY) Note that this field will not retain this format when opened by default in Excel. Excel will unsuccessfully try to interpret values as dates.

8 Year Measurement Year (YYYY)

9 Month Measurement Month (Month)

10 DBH Tree diameter in centimeters (cm) measured at 1.3 meters above the soil surface.

11 Height Tree height in meters (m)

12 Comments Observations / comments



Missing values are represented as -9999.

Please note that for trees indicated as Dead in the Comments column, the records for that Tree_ID were retained for all years through 2005. DBH and Height values were set to -9999 for the year a tree was Dead and subsequent years.

New individuals that had grown into the >2cm diameter class were tagged and measured at each date. Records for previous dates were inserted for this Tree_ID and Comments of <2cm were added. DBH and Height values were set to -9999 for trees <2cm.



Example Data Record:

Header records omitted.



Treatment,Block,Plot,Tree_ID,Species,Sample_ID,Measurement_Period,Year,Month,DBH,Height,Comments

Control,B1,P3,i155,Rollinia exsucca,Control>B1>P3>i155>Rollinia exsucca,Nov-99,1999,November,4.9,3.3,

Control,B1,P3,i155,Rollinia exsucca,Control>B1>P3>i155>Rollinia exsucca,May-00,2000,May,7.1,4.4,

Control,B1,P3,i155,Rollinia exsucca,Control>B1>P3>i155>Rollinia exsucca,Jun-01,2001,June,7.6,5,

Control,B1,P3,i155,Rollinia exsucca,Control>B1>P3>i155>Rollinia exsucca,Jul-02,2002,July,8.9,5.5,

Control,B1,P3,i155,Rollinia exsucca,Control>B1>P3>i155>Rollinia exsucca,Jul-04,2004,July,10.6,7,

...

Nitr+Phos,B3,P1,i198,Rollinia exsucca,Nitr+Phos>B3>P1>i198>Rollinia exsucca,May-00,2000,May,-9999,-9999,<2cm

Nitr+Phos,B3,P1,i198,Rollinia exsucca,Nitr+Phos>B3>P1>i198>Rollinia exsucca,Jun-01,2001,June,-9999,-9999,<2cm

Nitr+Phos,B3,P1,i198,Rollinia exsucca,Nitr+Phos>B3>P1>i198>Rollinia exsucca,Jul-02,2002,July,-9999,-9999,<2cm

Nitr+Phos,B3,P1,i198,Rollinia exsucca,Nitr+Phos>B3>P1>i198>Rollinia exsucca,Jul-04,2004,July,5.4,3,

Nitr+Phos,B3,P1,i198,Rollinia exsucca,Nitr+Phos>B3>P1>i198>Rollinia exsucca,Jul-05,2005,July,6,4,

Data Application and Derivation:

Understanding secondary successional processes in Amazonian terrestrial ecosystems is becoming increasingly important as continued deforestation expands the area that has become secondary forest, or at least has been through a recent phase of secondary forest growth. Most Amazonian soils are highly weathered and relatively nutrient poor, but the role of nutrients as a factor determining successional processes is unclear. Soils testing and chronosequence studies have yielded equivocal results regarding the possible role of nutrient limitation. See Davidson et al. (2004) for the allometric equation that may be used to convert these data into biomass estimates.

Quality Assessment (Data Quality Attribute Accuracy Report):

Quality Assessment:

The data set was examined for outlier measurements that may have been due to clerical errors in data entry.



Data values for some trees may show values of -9999 with an accompanying Comment of Dead for a year, though the previous year and following year show values indicating life / growth. This may be due to any of these possible causes:



* the tree had lost its leaves and appeared to be dead one year, but was not actually dead

* the tree was misidentified and the data collectors identified the wrong tree as dead or measured the wrong tree as alive or

* a data entry error.



However, given the small number of data values of this nature, these values were not removed from the data file.

Process Description:

Data Acquisition Materials and Methods:

All trees >2cm diameter at breast height were tagged, identified, and measured for diameter and height in November 1999. Fertilizer was applied to the plots, as described below, in January 2000 and February 2001. Tree heights and diameters were remeasured in May 2000, June 2001, July 2002, July 2004, and July 2005. New individuals that had grown into the >2cm diameter class were tagged and measured at each date. Mortality was noted in the Comments column for each sampling date.



The study site was a 6-year old secondary forest when the experiment began in 1999. The site was divided into 3 blocks, with four treatment plots (each 20m x 20m) located in each block (3 reps x 4 treatments = 12 plots). Three of the twelve plots were fertilized with nitrogen (100 kg N/ha as urea); three were fertilized with phosphorus (50 kg P/ha as superphosphate); three were fertilized with both nitrogen and phosphorus. The remaining three plots were not fertilized and served as the experimental control.

References:

Davidson, E.A., C.J.R. de Carvalho, I.C.G. Vieira, R.O. Figueiredo, P. Moutinho, F.Y. Ishida, M.T.P. dos Santos, J.B. Guerrero, K. Kalif, and R.T. Saba. 2004. Nitrogen and phosphorus limitation of biomass growth in a tropical secondary forest. Ecological Applications, Vol. 14: S150-S163. doi:10.1890/01-6006

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