NPP Tundra: Toolik Lake, Alaska, 1982

Four contrasting tundra vegetation types were studied near Toolik Lake, Alaska, in 1982. Living above- and below-ground biomass was sampled three times during the growing season using quadrats ranging from 10 cm x 20 cm to 50 cm x 50 cm. The dataset includes measurements of net primary production components, biomass, elemental content of above-ground samples, and leaf area index.

Use Cases

• Comparing net primary production (NPP) across tussock, shrub, heath, and wet tundra vegetation types.
• Analyzing seasonal biomass dynamics from three sampling occasions during the 1982 growing season.
• Studying the relationship between leaf area index (LAI) and above-ground productivity in arctic ecosystems.
• Modeling carbon storage and elemental cycling based on harvested biomass and tissue elemental content data.

Strengths

• Includes data from four distinct and contrasting tundra vegetation types, providing a basis for comparison.
• Sampling was conducted on three occasions during the growing season, capturing some temporal dynamics.
• Measurements include specific components of net primary production like stem secondary growth and rhizome growth.

Limitations

• Key metadata such as column names, row count, and file size are unknown across all platforms.
• Production, biomass, and elemental content of roots were not determined, limiting below-ground analysis.
• There is a conflict in the 'last updated' date: one source reports 2026-04-09, while another reports 1982-12-31.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Field sampling using randomly located quadrats and harvest methods; leaf area measured with a LI-COR leaf area meter.

Time Range

1982

Freshness

2026-04-09 23:39:28.035712

Geography

Toolik Lake, northern foothills of the Brooks Range, North Slope of Alaska (68.63 N 149.72 W)