LBA-ECO LC-02: Forest Biophysical Measurements in Acre, Brazil

From 1999 to 2002, diameter at breast height (DBH) measurements were collected for 1,875 trees across two forest sites in Acre, Brazil. The dataset includes 1,063 trees from the Catuaba Experimental Farm and 812 trees from the Humaita Forest Reserve, focusing on individuals with DBH between 10 and 35 cm and those greater than 35 cm. A companion file provides supplemental tree height and biomass data for the Catuaba site.

Use Cases

• Estimating forest biomass and carbon stocks based on DBH measurements.
• Analyzing forest structure and size-class distribution in bamboo-influenced and fragmented forests.
• Calibrating or validating remote sensing models of forest biophysical parameters.
• Comparing tree growth metrics between an 800-ha forest fragment and a 1,500-ha bamboo-dominant forest band.

Strengths

• Provides precise tree counts (1,875 total) from two distinct, geographically specified forest sites.
• Includes a companion dataset with additional tree height and biomass data for one site, enhancing utility.
• Measurements target specific DBH size classes (10-35 cm and >35 cm), allowing for focused analysis.

Limitations

• Column names and full data schema are unknown, limiting immediate understanding of the data structure.
• Conflicting last-update metadata exists between platforms (2004 vs. 2026), casting doubt on data currency.
• The license is ambiguously specified as 'other-license-specified', requiring further investigation for reuse.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Field inventory conducted within ten-hectare areas at each site.

Time Range

1999-2002

Freshness

Last updated dates conflict: 2004-04-30 on NASA Earthdata vs. 2026-04-10 on Data.gov.

Geography

Catuaba Experimental Farm and Humaita Forest Reserve, Acre, southwest Amazonia, Brazil.