70,483 Works

Air temperature and solar radiation data for Arikaree Glacier data logger (DP211), 1986 - 2006.

Jennifer F Morse & Mark Losleben
Climatological data were collected from an upper Green Lakes Valley climate station (Arikaree Glacier) throughout the year using an Omnidata DP211 datapod. This instrument has a sample interval of 5 minutes and records averages of those 5-minute readings every 2 hours. Thus, daily totals represent totals of 288 values. Parameters measured were air temperature (averages) and solar radiation (totals).

Transect snowpack ablation data for Niwot Ridge and Green Lakes Valley, 1992 - 1993.

Tom Davinroy
Lowering of the snowpack surface by ablation (melt) was measured on a bimonthly basis within couloirs above the Green Lakes and Isabelle Valleys during the summer months. One-inch diameter PVC poles were driven into the snowpack to form vertical transects within each couloir. The height difference (cm) between the top of each pole and the snow surface was recorded. On the subsequent visit the new height difference was recorded and the pole driven into the...

Transect snowpack ablation data for Green Lakes Valley, 1993 - 2005.

Caine, T. Nelson (Nel)
Lowering of the snowpack surface by ablation (melt) was estimated on a biweekly to weekly basis in the Green Lakes Valley during the summer months. Poles were driven into the snowpack to form transects in several snow-accumulation areas (Arikaree Glacier, Green Lakes 4 and 5, and the Martinelli basin). The height difference (cm) between the snow surface and the top of each pole was recorded. On the subsequent visit the new height difference was recorded...

Bacterial Production Data for lake and stream samples collected in summer 2012 through 2018, Arctic LTER, Toolik Lake Field Station, Alaska

George Kling
File containing data on bacterial productivity in lakes and streams collected in summer 2012 through 2018. Samples were collected at various sites near Toolik Lake Field Station (68 38'N, 149 36'W). Sample site descriptors include an assigned number (sortchem), site, date, time and depth, and bacterial production.

Georgia Coastal Ecosystems site, station Georgia Coastal Ecosystem LTER Study Site 6, Dean Creek, Sapelo Island, GA, study of animal density of Succinea in units of numberPerMeterSquared on a yearly timescale

Georgia Coastal Ecosystems, Andy Kretzer, Matt Ogburn, University Of Georgia, Monica.M Palta, University Of Georgia, Jacob Shalack, University Of Georgia, Laurel Berger-Bishop, Becky Greene, University Of Georgia, Dean Hardy, University Of Georgia, Merryl Alber, Associate Professor, Gayle Albers, University Of Georgia, Ken Helm, Caroline McFarlin, Graduate Student, Cristiano Salgado, University Of Houston, James Hollibaugh, Acting Director, Wade Sheldon … & EcoTrends Project Coordinator

Coarse Woody Debris on Watershed 6, Hubbard Brook Experimental Forest

Chris Johnson & Thomas G Siccama
Fallen dead wood was sampled in Watershed 6 (W6) of the Hubbard Brook Experimental Forest in 1978, 1995, and 2016. Two techniques, one for bolewood >3 cm in diameter and one for fallen twigs <3 cm and > 2 mm, were combined to determine the mass of fallen dead wood in the forest. The mass of deadwood in the forest remained unchanged over time, although the species composition did change. These data were gathered as...

Plant species composition data for Saddle grid, 1989 - ongoing.

Hope Humphries
Permanent 1-m^2 plots were established beside each of the 88 Saddle grid stakes in 1989 by Marilyn Walker, who led the sampling effort until 1997. Each plot was located within 2 m of the stake, but always in the same vegetation type as that associated with the stake. The distance and direction from the grid stake were randomly selected, and thus varied from plot to plot. Point quadrat measurements have been made at irregular intervals...

STEPPS 2000 Year Forest Composition Estimates, Upper Midwest US, Level 2

Andria Dawson, Simon Goring, Christopher J. Paciorek, Stephen T. Jackson, Jason S. McLachlan & John W. Williams
Forest ecosystems in eastern North America have been in flux for the last several thousand years, well before Euro-American land clearance and the 20th-century onset of anthropogenic climate change. However, the magnitude and uncertainty of prehistoric vegetation change have been difficult to quantify because of the multiple ecological, dispersal, and sedimentary processes that govern the relationship between forest composition and fossil pollen assemblages. Here we extend STEPPS, a Bayesian hierarchical spatio-temporal pollen-vegetation model, to estimate...

Response of Lake Baikal periphyton to nutrient enrichment at 10 sites across a land use gradient: Results from a nutrient diffusing substrata (NDS) experiment

Ted Ozersky, Ekaterina A Volkova, Nina A Bondarenko, Oleg A Timoshkin, Valery V Malnik, Valentina M Domysheva & Stephanie E Hampton
This data set contains results of a study on the response of benthic algae to experimental nutrient enrichment in the nearshore of Lake Baikal, Russia. Nutrient diffusing substrata (NDS) were deployed at 10 sites across a land-use gradient (from town to forested) during August to September of 2015 . Four NDS treatments were used at each site: 'control', 'added phosphorus', 'added nitrogen' and 'added nitrogen and phosphorus'. NDS tiles were left in the lake for...

Cedar Creek Ecosystem Science Reserve site, station Old Field 24 at Cedar Creek, study of plant cover of Pinus in units of percent on a yearly timescale

Cedar Creek Natural History Area, Johannes Knops, David Tilman, Principal Investigator, EcoTrends Project & EcoTrends Project Coordinator

Long-term trends in abundance of Lepidoptera larvae at Hubbard Brook Experimental Forest and three additional northern hardwood forest sites, 1986 – 1997

Matthew Ayres & Richard T Holmes
Numbers and lengths of Lepidoptera larvae (caterpillars, all species) were censused on shrub level foliage at biweekly intervals from late May/early June through late July/early August each year. Measurements were conducted on the Main bird plot in the Hubbard Brook Experimental Forest and on three additional plots within the White Mountain National Forest from 1986-1997.. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at...

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