Leaf Carbon and Isotope Measurements from Nine Amazonian Tree Species

Nine Amazonian tree species were analyzed for leaf carbon, nitrogen, leaf area index, and carbon isotope ratios in 2001. The dataset, produced by NASA, contains measurements from the youngest and oldest leaves of sampled branches at the Manaus ZF2 Jacaranda transect in Brazil. It is available as a comma-delimited file.

Use Cases

• Modeling carbon allocation and nitrogen use efficiency in tropical trees using C and N concentration data.
• Investigating photosynthetic pathways and carbon source age via analysis of 13C and 14C isotope ratios.
• Studying leaf development and aging by comparing traits between youngest and oldest leaves from the same branch.
• Calibrating remote sensing estimates of forest productivity with ground-measured Leaf Area Index (LAI) values.

Strengths

• Data includes measurements from nine distinct tree species, providing a comparative view.
• Samples were taken from both the youngest and oldest leaves on a branch, capturing developmental variation.
• Analysis covers multiple biochemical traits (C, N, LAI, 13C, 14C) from a single sampling event.

Limitations

• Key metadata such as row count, file size, and specific column names are unavailable from all sources.
• Sources conflict on the last updated date, with one listing 2001 and another listing a future date of 2026.
• The license is ambiguously listed as 'other-license-specified' without further detail.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Leaf tips and petioles were sampled from branches in the Manaus ZF2 Jacaranda transect area and analyzed in a laboratory.

Time Range

2001

Freshness

2001-08-08 23:59:59.999000

Geography

Manaus ZF2 Jacaranda transect area, Amazonas, Brazil