NPP Grassland: Above-Ground Biomass and Climate Data for Swedish Coastal Meadow

From April 1968 to April 1969, monthly measurements of above-ground live biomass and dead matter were collected from two ungrazed seashore meadow plots in Tullgarnsnaset, Sweden. The dataset includes companion monthly and annual climate data from a nearby Stockholm weather station covering the period 1951-1990. Annual above-ground net primary production (ANPP) was estimated using multiple calculation methods, with mean estimates ranging from 324 to 430 grams per square meter per year.

Use Cases

• Comparing methods for estimating annual net primary production (ANPP) based on peak biomass, sum of species maxima, and single square clippings.
• Analyzing the seasonal dynamics of live biomass and dead matter disappearance in a coastal meadow ecosystem.
• Correlating long-term climate patterns (1951-1990) with short-term biomass measurements (1968-1969) for ecological modeling.
• Studying the productivity of Juncus gerardii-dominated seashore meadows without grazing pressure.

Strengths

• Includes a long-term climate record (40 years from 1951-1990) to contextualize the biological measurements.
• Provides ANPP estimates calculated via multiple standard ecological methods, allowing for methodological comparison.
• Contains spatially co-located data, with biomass plots and a weather station both near Stockholm.

Limitations

• Below-ground biomass was measured but is not included in the reported data, limiting a full ecosystem productivity assessment.
• Key metadata such as column names, row counts, and specific file sizes are unavailable across all platforms.
• There is a conflict in the 'last updated' date between platforms (1990 vs. 2026), casting doubt on metadata maintenance.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Field measurements of above-ground biomass and dead matter collected approximately monthly from two defined plots.

Time Range

1951-1990 (climate data); 1968-1969 (biomass measurements)

Freshness

2026-04-09 23:38:11.811805

Geography

Tullgarnsnaset, near Stockholm, Sweden (approximately 59.20 N, 17.50 E for plots; 59.4 N, 18.0 E for weather station)