Bartlett Forest (BART)

Bartlett Experimental Forest (BART), located in the White Mountains National Forest, New Hampshire, is managed as the U.S. Forest Service, Northern Research Station.

Mean annual temperature is approximately 6.6°C (summer: 20°C, winter: −8°C), and mean annual precipitation is approximately 1300 mm, distributed evenly throughout the year. The soils are Spodosols, developed on glacial till derived from granite and gneiss. Soils are well drained, acidic, and nutrient poor. Aspects across the forest are primarily north and east.

Forest stands are 90-150 years in age and are dominated by the deciduous species Acer rubrum (red maple) and Fagus grandifolia (American beech), with lesser amounts of Acer saccharum (sugar maple), Betula papyrifera (paper birch) and Betula alleghaniensis (yellow birch). Conifers like Tsuga canadensis (eastern hemlock), Abies balsamea (balsam fir), and Pinus strobus (Eastern white pine) are also present in smaller amounts.

This particular site was chosen as representative of soils, elevation, climate, and tree species composition typical of forested areas throughout New England and northern New York. In 2012, Dietze Lab (Boston University) set up inventory plots in compartments C1 (lower elevation plots) and C38 (higher elevation plots). In each compartment, two closed canopy plots of ~1 ha were established (C1P1, C1P2, C38P1, C38P2). Since 2012, data collection has included seed rain and adult tree/sapling/seedling censuses. BART has active NEON and Ameriflux towers.

Climate data come from the tower operated by Andrew Richardson.

Pinus strobus in mast and non-mast years at BART-C1P1.

Some recent publications:

Fer, I., Kelly, R., Moorcroft, P. R., Richardson, A. D., Cowdery, E. M., and Dietze, M. C. 2018. Linking big models to big data: efficient ecosystem model calibration through Bayesian model emulation, Biogeosciences, 15, 5801-5830.

Lee, M. S., Hollinger, D. Y., Keenan, T. F., Ouimette, A. P., Ollinger, S. V., and Richardson, A. D. 2018. Model-based analysis of the impact of diffuse radiation on CO2 exchange in a tem- 65 perate deciduous forest, Agr. Forest Meteorol., 249, 377–389.

Toda, M., Richardson, A. D. 2018. Estimation of plant area index and phenological transition dates from digital repeat photography and radiometric approaches in a hardwood forest in the Northeastern United States, Agr. Forest Meteorol., 249, 457-466.

Field Researchers

Don't miss these other field sites:

Soaproot Saddle (SOAP)

Soaproot Saddle is part of the Sierra National Forest and managed by the Forest Service. Jessica Bolis, NEON domain manager, facilitated access to the plots.

Wind River Experimental Forest (WREF)

The Wind River Experimental Forest, north of the Columbia River River Gorge and part of Gifford Pinchot National Forest, has been studied by the USFS since 1908.

Yellowstone (YELL)

Parent materials combine a history of volcanism, faulting, and glaciation. The park remains seismically active, with frequent earthquakes and many hydrothermal features. Vegetation includes a mosaic of forest, sagebrush-steppe and riparian bottomlands.

Treehaven (TREE)

The 560-ha Treehaven Forest lies within the northern Great Lakes region south of Rhinelander, Wisconsin. Operated by the University of Wisconsin-Stevens Point, this site focuses on natural resource education.

Harvard Forest (HARV)

Sampling at Harvard Forest includes long term plots established by our lab in 2012 and new efforts located at NEON plots.

Mountain Lake Biological Station (MLBS)

Mountain Lake Biological Station is located in the Southern Appalachians of Southwest Virginia. This field site is administered through the University of Virginia. The NEON plots extend from mixed decidious forests to pine plantations.

Smithsonian Environmental Research Center (SERC)

Smithsonian Environmental Research Center is located south of Annapolis, MA. Formally farmland, this coastal plain forest sits on the western shore of the Chesapeake bay. The 1070-ha site is operated by the Smithsonian Institute.

Talladega National Forest (TALL)

The Talladega NEON site is located within the Oakmulgee Ranger District of the Talladega National Forest. This rolling terrain is part of the Fall Line Hills of the Eastern Gulf Coastal Plain. In the 1800’s this area was heavily logged, but since the 1980’s the Forest Service has worked on restoring this area back to the Longleaf Savannah ecosystem.

Ordway-Swisher Biological Station (OSBS)

The University of Florida hosts the NEON OSBS site at their Ordway-Swisher Biological Station in north-central Florida. Andrew Rappe, the Assistant Director, gave us an orientation to the site.

Disney Wilderness Preserve (DSNY)

Formerly ranchland, the Disney Wilderness Preserve has been restored to Pine savanna under ownership of The Nature Conservancy. Previously, most of the preserve consisted of flatwoods open to cattle and excluded from fire.

Niwot Ridge (NIWO)

Niwot Ridge is an LTER site administered through University of Colorado’s Institute of Arctic and Alpine Research (INSTAAR)at their Mountain Research Station. NEON sites extend from P. contorta and subalpine spruce-fir to above treeline.

Our Partners

PBGJAM is a collaborative project with financial and logistical support from the following partners