Amazon Leaf Gas Exchange and Isotope Data from LBA-ECO

Leaf-level gas flux and chemical property data were collected from trees, lianas, and pasture vegetation at eight sites in the Brazilian Amazon states of Pará and Amazonas. The dataset includes photosynthesis measurements, CO2, light, and humidity response curves, stomatal conductance data, leaf weight, and carbon/nitrogen concentrations with stable isotope signatures (13C, 15N) for a subset of samples. It was produced by NASA's LBA-ECO project, with measurements taken from November 1999 through December 2003.

Use Cases

• Modeling photosynthetic responses to CO2 and light by analyzing the provided A-Ci and light response curves.
• Investigating plant water-use efficiency and stomatal behavior using the humidity response curves and leaf-to-air water vapor mole fraction deficit data.
• Studying nutrient cycling and ecosystem productivity by examining the reported leaf carbon and nitrogen concentrations.
• Tracing carbon and nitrogen sources and metabolic pathways within Amazonian vegetation using the stable isotope signatures for 13C and 15N.
• Comparing physiological traits across different plant functional types (trees, lianas, pasture saplings, grass) sampled at the eight locations.

Strengths

• Contains detailed physiological response curves (CO2, light, humidity) for multiple plant types, enabling mechanistic analysis.
• Includes stable isotope data (13C, 15N) for a subset, which is a precise tracer for ecological processes.
• Covers a multi-year time series from November 1999 to December 2003 across eight distinct Amazonian sites.

Limitations

• Critical metadata conflicts: the 'datagov' platform lists a future last updated date (2026-03-13), while 'nasa_earthdata' lists 2003-12-17, creating uncertainty about data freshness.
• Specific row count, file size, and complete column names are not provided by any source, limiting precise assessment of dataset scale and structure.
• Stable isotope signatures and chemical concentrations are only reported for a subset of the total samples.

Provenance

Source

National Aeronautics and Space Administration (NASA), LBA-ECO project.

Collection Method

Field measurements collected from leaf samples across eight sampling locations.

Time Range

November 1999 to December 2003

Freshness

2003-12-17

Geography

States of Pará (south of Santarém) and Amazonas (near Manaus), Brazilian Amazon.