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Long-term ecological studies to investigate processes operating at long time scales and over broad spatial scales. Promotes synthesis and comparative research across sites and ecosystems. Links to individual sites and international partners.

Field research of the Arctic LTER is based at Toolik Lake, Alaska, in the northern foothills of the Brooks Range. Project is centered at the Ecosystems Center of the Marine Biological Laboratory, Woods Hole, Massachusetts.

Research program focuses on improving our understanding of the boreal forest ecosystem in interior Alaska, USA.

2200-hectare experimental ecological reserve operated by the University of Minnesota. Suitable for study of the deciduous forest, the boreal forest, and the prairie biomes.

Ecological research site in the mountains of North Carolina. Research to evaluate, explain, and predict how water, soil, and forest resources respond to management practices, natural disturbances, and the atmospheric environment.

Canada's national network of monitoring and research sites characterized by long term, multi-disciplinary studies.

Investigating how variability in regional climate and freshwater inputs, disturbance, and perturbations affect the coastal Everglades ecosystem (USA).

An LTER site working to improve the understanding of forest ecosystem processes through the long-term study of selected forest plots in Switzerland. A particular emphasis is the possible effects of air pollution and climate change on forest ecosystem processes.

A center for analysis of forest and stream ecosystems in the U.S. Pacific Northwest.

The project focuses on changes in the distribution of soil resources as an index of the impact of vegetation change--desertification--on semiarid lands.

The Konza Prairie Research Natural Area (KPRNA), an LTER site, is representative of native tallgrass prairie in the Flint Hills of eastern Kansas. Website has information about the prairie and ongoing research there.

Eastern Colorado site for research in areas including floral and faunal dynamics and land-atmosphere interactions. Includes species list, publications database, project descriptions, current activities, and other information.

A collaborative effort involving more than 1100 scientists and students investigating ecological processes over long temporal and broad spatial scales. The network promotes synthesis and comparative research across sites and ecosystems and among other related national and international research programs.

The UK's integrated long-term environmental monitoring network. Information on the network, summary data, environmental indicators, education, and publications.

Manages the Long Term Resource Monitoring Program for river inventory and monitoring in the United States.

The Virginia Coast Reserve Long-Term Ecological Research Project (VCR/LTER) focuses on understanding the ecosystems and dynamics of the barrier island/lagoon/marsh system on the Eastern Shore of Virginia. The site includes support materials for researchers including data, images, publication lists, and full-text documents. It is part of the NSF-funded U.S. LTER Network.