2,732 Works

Mean 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...

Climate data for D1 data logger (CR21X), 1986 - 2000.

Jennifer F Morse & Mark Losleben
Climatological data were collected from a Niwot Ridge climate station (D1) throughout the year using a Campbell Instruments CR21X data logger. Maximum and minimum values arerecorded instantaneously, with the sampling interval being 30 seconds. Daily means and totals are calculated from 2880 individual measurements. This instrument was programmed to generate both hourly and daily output. Parameters measured includesolar radiation, air temperature, relative humidity, barometric pressure, wind speed, wind vector, and wind direction. Solar radiation CR21X...

Forest Inventory of a Calcium Amended Northern Hardwood Forest: Watershed 1, 2011, Hubbard Brook Experimental Forest

John J. Battles, Charles Driscoll, Scott Bailey, Joel Blum, Don Buso, Tim Fahey, Melany Fisk, Peter Groffman, Chris Johnson & Gene Likens
In order to evaluate the role of Ca supply in regulating the structure and function of base-poor forest and aquatic ecosystems, the Ca content of soil was increased through the application of wollastonite (CaSiO3) in October 1999. Forest inventory surveys were initiated in 1996 and repeated at 5 year intervals. This data set includes 2011 inventory measurements. The data consists of a total inventory of all trees >=10 cm diameter-at-breast-height (dbh) on the whole of...

Water level recordings from wells in Watershed 3 at the Hubbard Brook Experimental Forest, 2007 - present

Kevin McGuire, Scott Bailey & John Gannon
The project is aimed at explaining the spatial and temporal variation in stream water chemistry at the headwater catchment scale using a framework based on the combined study of hydrology and soil development – hydropedology. The project will demonstrate how hydrology strongly influences soil development and soil chemistry, and in turn, controls stream water quality in headwater catchments. Understanding the linkages between hydrology and soil development can provide valuable information for managing forests and stream...

Net N mineralization in the MELNHE study at Hubbard Brook Experimental Forest, Bartlett Experimental Forest and Jeffers Brook, central NH USA, 2008 - present

Melany Fisk
The Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE) project studies N and P acquisition and limitation through a series of nutrient manipulations in northern hardwood forests. This data set includes net N mineralization measured in Oe, Oa, and mineral soil horizons in all 13 of the MELNHE study sites. Samples are collected every several years, beginning with pretreatment (2008 and 2009) through 2014, representing 3 years of N and P fertilization. These data were...

Soil properties in the MELNHE study at Hubbard Brook Experimental Forest, Bartlett Experimental Forest and Jeffers Brook, central NH USA, 2009 - present

Melany Fisk
The Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE) project studies N and P acquisition and limitation through a series of nutrient manipulations in northern hardwood forests. This data set includes soil properties measured in Oe, Oa, and mineral soil horizons in all 13 of the MELNHE study sites in 2009 (pre-treatment). These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook...

Forest Inventory of the Climate Change Across Seasons Experiment (CCASE) plots at the Hubbard Brook Experimental Forest

Pamela Templer
DBH was measured for all trees greater than or equal to 5 cm DBH within Climate Change Across Seasons Experiment (CCASE) plots. Reference (or control) plots are shared with the collaborating Northern Forest DroughtNet experiment. There are six plots total (each 11 x 14m). Two are warmed 5 degrees C throughout the growing season (Plots 3 and 4). Two others are warmed 5 degrees C in the growing season and have snow removed during winter...

Zooplankton density for all samples collected from Toolik Lake and lakes near the Toolik Field Station, Arctic LTER 2003 - 2011. (Reformatted to ecocomDP Design Pattern)

Christopher Luecke
This data package is formatted according to the "ecocomDP", a data package design pattern for ecological community surveys, and data from studies of composition and biodiversity. For more information on the ecocomDP project see https://github.com/EDIorg/ecocomDP/tree/master, or contact EDI https://environmentaldatainitiative.org. This Level 1 data package was derived from the Level 0 data package found here: https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-arc&identifier=10272&revision=4 The abstract below was extracted from the Level 0 data package and is included for context:

Virgin Islands National Park: Coral Reef: Population Dynamics: Scleractinian corals

& Peter Edmunds
These data are evidence of the the long-term dynamics of shallow coral reefs along the south coast of St. John from as early as 1987. These data describe coral reef community structure as percent cover based on the analysis of color photographs. All of these data originate from color images of photoquadrats recorded annually (usually in the summer) from as early as 1987. The data falls into three groups. The two groups that are contained...

Hubbard Brook Experimental Forest (US Forest Service): Soil Frost Measurements, 1955 - present

John Campbell
Soil frost measurements have been collected approximately weekly during the winter season using transect s adjacent to the established network of standard rain gages from 1956 to the present. Soil frost data is collected in conjunction with snow depth measurements along each snow course. The ground is probed with a ski pole to detect the presence or absence of frost at 2 points adjacent to each of the 10 snow sample points. At the first...

Hubbard Brook Experimental Forest (US Forest Service): Soil Temperature Measurements, 1959 - 1998

John Campbell
Soil temperature data were collected approximately weekly at the Hubbard Brook Experimental Forest from 1959 - 1998. Colman temperature-moisture sensors were installed at one location west of weir 4 and replicated (1 and 2) at depths of 3, 8, 15, 30, 46 and 61 cm. Soil resistance was recorded using a manually-operated AC resistance meter then converted to temperature. In 1998 the battery needed to operate the meter to read the sensors was no longer...

Black-throated Blue Warbler nests at the Hubbard Brook Experimental Forest, 1986 - 2010

Nick Rodenhouse, Richard T. Holmes, Scott Sillett & Michael Webster
This dataset provides nest records for black-throated blue warblers breeding at the Hubbard Brook Experimental Forest. We located and monitored nesting attempts (successful and unsuccessful) of all warblers within three gridded study plots. Black-throated blue warblers at Hubbard Brook often attempt multiple broods per season, either as renests (i.e., attempts to produce another brood following a nest failure) or double-broods (i.e., attempts to produce another brood after successfully fledging offspring). Although they are usually socially...

Counts of potential nest predators from Black-throated Blue Warbler territories, Hubbard Brook Experimental Forest, 1997 - 2010

Nick Rodenhouse, Richard T. Holmes, Scott Sillett & Michael Webster
This dataset provides counts of potential nest predators recorded on surveys conducted in black-throated blue warbler territories at the Hubbard Brook Experimental Forest. Surveys occurred on three gridded study plots at the HBEF: low elevation (250-350 m; 85 ha), middle elevation (450-600 m; 65 ha), and high elevation (750-850 m; 35 ha). See Rodenhouse et al. 2003 for plot details. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES...

Soil moisture and temperature along an elevation gradient at the Hubbard Brook Experimental Forest, 2010 - present.

Peter M. Groffman
Soil temperature and soil moisture have been measured at multiple locations at the Hubbard Brook Experimental Forest (HBEF), as part of a study of the relationships between snow depth, soil freezing and nutrient cycling (http://www.ecostudies.org/people_sci_groffman_snow_summary.html). In October 2010, we established 6, 20 x 20-m plots (intensive plots) and 14 10 x 10-m plots (extensive plots) along an elevation gradient, with eight of the plots on north-facing slopes and twelve on south-facing slopes. Soil temperature and...

Chemistry of freely-draining soil solutions at the Hubbard Brook Experimental Forest, Watershed 1, 1996 - present.

Charles Driscoll
Tension-free lysimeters were installed in three soil horizons at 13 locations within Hubbard Brook Experimental Forest Watershed 1, representing the variation in elevation and forest type of the watershed. At each location, the organic horizon and the B horizon were selected for lysimeter placement. Soil solution samples were collected approximately monthly and analyzed for base cations, soluble anions, trace metals, nitrogen and carbon. These data were gathered as part of the Hubbard Brook Ecosystem Study...

Soil moisture data across a Florida scrub and sandhill landscape collected from 1998-2018 at Archbold Biological Station

Carl W Weekley & Eric S Menges
This project was initiated 1998 to examine the variation in percent soil moisture in relation to rainfall, vegetation type, gaps, and time-since-fire in upland habitats at Archbold Biological Station, in south-central Florida. Data were collected from 78 sampling points across four vegetation types (rosemary scrub, scrubby flatwoods, oak-hickory scrub and sandy roadsides) with different time-since-fires (2-3 years or >20 years post-fire). In January 2006, 30 additional sampling points were added to include a fourth vegetation...

Physical and Chemical Characteristics of Soil Sediments from the Shark River Slough and Taylor Slough, Everglades National Park (FCE LTER) from August 2004 to Present

Randy Chambers, Timothy Russell & Adrianna Gorsky
These data represent the results of soil sampling and analysis from all 17 FCE LTER transect locations during from Year 2004 thru Year 2017. Surface soils from 0-10 cm been homogenized and analyzed from Sawgrass and mangrove sites and Florida Bay sites. Soils and sediments were analyzed for a suite of physical/chemical variables, including bulk density, organic matter content, extractable iron, AVS and CRS sulfur, and various forms of extractable phosphorus. These analyses are completed...

MCR LTER: Coral Reef: Water Column: Nearshore Water Profiles, CTD, Primary Production, and Chemistry ongoing since 2005

, Alice Alldredge & Craig Carlson
This data package contains water chemistry measurements taken 2 to 4 times per year at 6 stations on the north shore of Moorea, French Polynesia: Forereef, Lagoon, Fringing Reef, Cooks Bay, Cooks Bay Stream Mouth, and Offshore (5 km due north). Measurements include standard CTD parameters, nutrients, chlorophyll, phaeopigments, particulate organic carbon and nitrogen, dissolved organic carbon, dissolved inorganic carbon, total alkalinity, water column primary production, and abundance of bacteria. Sampling began in August, 2005....

Soil moisture data across a Florida scrub and sandhill landscape collected from 1998-2018 at Archbold Biological Station

Carl W Weekley & Eric S Menges
This project was initiated 1998 to examine the variation in percent soil moisture in relation to rainfall, vegetation type, gaps, and time-since-fire in upland habitats at Archbold Biological Station, in south-central Florida. Data were collected from 78 sampling points across four vegetation types (rosemary scrub, scrubby flatwoods, oak-hickory scrub and sandy roadsides) with different time-since-fires (2-3 years or >20 years post-fire). In January 2006, 30 additional sampling points were added to include a fourth vegetation...

Lake Wingra: Fish Lengths and Weights

NTL Lead PI, John Magnuson, Stephen Carpenter & Emily Stanley
Data are collected annually to enable us to track the fish assemblages of Lake Wingra. Sampling is done at six littoral zone sites per lake with a beach seine, minnow or crayfish traps, and fyke nets, while a boat-mounted electrofishing system samples four littoral transects. Vertically hung gill nets are used to obtain two pelagic samples per lake from the deepest point. A trammel net samples across the thermocline at two nearshore sites per lake....

Chemistry of Streamwater at the Hubbard Brook Experimental Forest, Watershed 6, 1963 - present

Gene E. Likens
Streamwater chemistry has been measured at the Hubbard Brook Experimental Forest since 1963. These data include volume-weighted, average, monthly concentrations of cations, anions, and pH measured in 9 watersheds. Monthly averages are calculated from samples collected at weekly intervals from a point above the stream gauging station. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated...

Chemistry of Streamwater at the Hubbard Brook Experimental Forest, Watershed 8, 1995 - present

Gene E. Likens
Streamwater chemistry has been measured at the Hubbard Brook Experimental Forest since 1963. These data include volume-weighted, average, monthly concentrations of cations, anions, and pH measured in 9 watersheds. Monthly averages are calculated from samples collected at weekly intervals from a point above the stream gauging station. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated...

Hubbard Brook Experimental Forest (US Forest Service): Total Daily Precipitation by Watershed, 1956 - present

John Campbell
Watershed precipitation is estimated using the Thiessen Means weighting method. Daily watershed precipitation values are a weighted average of daily precipitation from standard gages in or near the watershed. The weighting factor for each gage is the fraction of the watershed area nearest that gage. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained...

Chemistry of Bulk Precipitation at Hubbard Brook Experimental Forest, Watershed 3, 1963 - present

Gene E. Likens
Precipitation chemistry has been measured at the Hubbard Brook Experimental Forest since 1963. This data set includes volume-weighted, average, monthly concentrations of cations, anions, and pH for watershed 3. Monthly averages are calculated from samples collected at weekly intervals from several bulk precipitation stations located in the experimental watersheds. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which...

Chemistry of Bulk Precipitation at Hubbard Brook Experimental Forest, Watershed 8, 1995 - present

Gene E. Likens
Precipitation chemistry has been measured at the Hubbard Brook Experimental Forest since 1963. This data set includes volume-weighted, average, monthly concentrations of cations, anions, and pH for watershed 8. Monthly averages are calculated from samples collected at weekly intervals from several bulk precipitation stations located in the experimental watersheds. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which...

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