John Crow Ridge Tropical Forest NPP and Climate, 1974-1978

Net primary productivity (NPP) and climate data were measured from 1974 to 1978 across five sub-types of upper montane tropical forest in Jamaica's Blue Mountains. The dataset includes measurements of biomass, productivity, tree mortality, litter, leaf area index (LAI), and nutrient content of leaf fall, alongside long-term climate records from a nearby botanical garden. Above-ground biomass estimates range from 23,000 to 34,000 g/m², with annual above-ground NPP estimated between 654 and 1,057 g/m²/year.

Use Cases

• Modeling carbon stocks based on measured above-ground biomass values (23,000-34,000 g/m²) and below-ground biomass (5,370 g/m²).
• Comparing productivity of montane vs. lowland tropical forests using ANPP estimates (654-1,057 g/m²/year) and LAI data (5.5-5.7 m²/m²).
• Analyzing long-term forest dynamics from tree mortality and litterfall measurements taken in permanent 10m x 10m plots.
• Correlating forest productivity with local climate conditions using the accompanying long-term climate data files.

Strengths

• Contains detailed, site-specific biomass and productivity measurements with explicit value ranges (e.g., ANPP 654-1057 g/m²/year).
• Includes long-term climate data from a nearby station, providing environmental context for the ecological measurements.
• Data collection spans a multi-year study period (1974-1978) within defined, contiguous permanent plots.

Limitations

• Metadata completeness is low; specific column names and row counts are not provided across platforms.
• The dataset's last update date is inconsistently reported, with one source showing a future date (2026-04-09).
• Below-ground biomass was determined for only one site, limiting comprehensive root biomass analysis.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Field measurements in permanent plots using destructive harvesting, non-destructive regression, and litter collection; climate data from a weather station.

Time Range

1974 to 1978

Freshness

2026-04-09 23:36:46.390284

Geography

John Crow Ridge, Blue Mountains, Jamaica (18.08 N, 76.65 W)