Secondary Forest Carbon and Nutrient Stocks in Central Amazonia

Measurements report carbon and nutrient stocks in above-ground vegetation and soil pools from three cattle ranch sites in Amazonas, Brazil. Data collection occurred from September 2000 to July 2001, focusing on secondary forest recovery ranging from 0 to 14 years since pasture abandonment. The dataset, produced by ORNL_CLOUD and referenced in Feldpausch et al., 2004, consists of 2 comma-delimited ASCII files.

Use Cases

• Analyzing carbon stock accumulation rates in regenerating secondary forests over a 14-year chronosequence.
• Comparing nutrient concentrations (C, N, P, K, Ca, Mg) in foliage, wood, and soil samples (0-45 cm depth) across recovery stages.
• Modeling the dynamics of nutrient and carbon buildup in post-pasture ecosystems in central Amazonia.
• Assessing the impact of pasture abandonment and reclamation on aboveground biomass and soil nutrient pools.

Strengths

• Data provides a temporal gradient with sites representing forest recovery from 0 to 14 years since abandonment.
• Measurements include multiple nutrient elements (C, N, P, K, Ca, Mg) across distinct vegetation and soil pools.
• Samples were collected from three specific, named field sites (Fazenda Rodao, Embrapa-DAS, Fazenda Dimona) along a defined transect (BR-174).

Limitations

• Conflicting last updated dates exist across platforms (2001-07-15 and 2026-03-13), creating uncertainty about metadata maintenance.
• Key structural details like row count, column names, and exact file sizes are not provided by any source.
• The license is ambiguously listed as 'other-license-specified' or 'None', requiring further investigation for reuse.

Provenance

Source

ORNL_CLOUD

Collection Method

Field measurements of aboveground biomass, and laboratory analysis of collected foliage, wood, and soil samples for nutrient concentrations.

Time Range

2000-09 to 2001-07

Freshness

2026-03-13 01:11:45.412453

Geography

State of Amazonas, Brazil, along road BR-174 north of Manaus at three fazendas (cattle ranches).