Point frame vegetation data collected 1989-2023 at the International Tundra Experiment (ITEX) experimental warming plots and the Toolik-Imnavait 1 km ambient grids in the North Slope of Alaska
Principal Investigator(s): View help for Principal Investigator(s) US Department of Agriculture; US Forest Service
Version: View help for Version V1
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Project Citation:
US Department of Agriculture, and US Forest Service. Point frame vegetation data collected 1989-2023 at the International Tundra Experiment (ITEX) experimental warming plots and the Toolik-Imnavait 1 km ambient grids in the North Slope of Alaska. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2026-05-31. https://doi.org/10.3886/E248790V1
Project Description
Project Title:
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Point frame vegetation data collected 1989-2023 at the International Tundra Experiment (ITEX) experimental warming plots and the Toolik-Imnavait 1 km ambient grids in the North Slope of Alaska
Summary:
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The Arctic is warming at more than twice the rate of the global average. The International Tundra Experiment (ITEX) was established in the early 1990s to understand the effects of environmental variability as a result of climate change on tundra vegetation. This data publication includes tabular plant community composition and structure data for four sites in the North Slope of Alaska, USA that are part of the ITEX: 1) 1-square kilometer (km²) ambient grid near Toolik Lake (85 plots), 2) 1 km² ambient grid near Imnavait Creek (71 plots), 3) one experimentally warmed manipulated site near Toolik Lake (21 control plots and 21 treated plots), and 4) a snow depth manipulated site near Toolik Lake (25 control plots and 23 treated plots). Treated plots were warmed with open-top chambers which raised the ambient air temperature 2-3 degrees Celsius. Data at the two ambient sites were collected approximately every four to six years from 1989 to 2023. The experimentally warmed/snow manipulated plots were sampled approximately every two to five years from 1994-2023. Measurements at points on each plot include: the height of the top (canopy) and bottom (understory) vegetation structures relative to the ground; whether the vegetation was live or standing dead; and whether the vegetation was a woody or non-woody structure. Species, or the large taxa, was also recorded.
Original Distribution URL:
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https://www.fs.usda.gov/rds/archive/catalog/RDS-2024-0048
Scope of Project
Subject Terms:
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biota;
Climate change;
Climate change effects;
Ecology;
Ecosystems;
Environment;
Plant ecology;
Forest & Plant Health;
Climate effects;
Inventory;
Monitoring;
Analysis;
ITEX;
vegetation species;
vegetation cover;
point framing;
arctic;
tundra;
OTC (open-top chamber);
snowfence;
Alaska;
Imnavait Creek;
Toolik Lake;
North Slope
Geographic Coverage:
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Alaska
Time Period(s):
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1989 – 2023
Data Type(s):
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observational data
Collection Notes:
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DOI: https://doi.org/10.2737/RDS-2024-0048
Authors: Gould, William A. ; Betway-May, Katlyn R. ; Walker, Marilyn D. ; Walker, Donald A.
Publication year: 2025 (Downloaded 2026-05-30)
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