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Forest Inventory of a Northern Hardwood Forest: Watershed 6 2002, Hubbard Brook Experimental Forest

Forest inventory surveys were initiated in 1965, repeated in 1977, and repeated at 5 year intervals after that; this data set was collected in summer of 2002. The inventory consists of a total inventory of all trees >=10 cm diameter-at-breast-height (dbh) on the whole of the watershed (13.23 ha), as measured in each of the 208 25 m x 25 m plots. Trees >=2 to <=10 cm dbh were subsampled using a 3 meter wide strip along one edge of each 25 m x 25 m plot. With the addition of tree tags in 2002 on all trees >=10 cm dbh, tracking of individual trees is now possible. 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 by the USDA Forest Service, Northern Research Station.

Forest Inventory of a Whole Tree Harvest: Hubbard Brook Experimental Forest Watershed 5, 1982, pre-harvest

A whole-tree harvest was conducted during the dormant season of 1983-1984 in order to assess ecosystem response to whole-tree logging operations. Pre-harvest forest inventory surveys were conducted in 1982 on the whole of the watershed and are presented in this dataset. Full post-harvest surveys were conducted in 1990, 1994 and every 5 years thereafter. Survey methods differed between years due to the variability encountered in the aggrading forest. 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 by the USDA Forest Service, Northern Research Station.

Forest Inventory of a Whole Tree Harvest: Hubbard Brook Experimental Forest Watershed 5, 1990, 7 years post-harvest

A whole-tree harvest was conducted during the dormant season of 1983-1984 in order assess ecosystem response to whole-tree logging operations. Pre-harvest forest inventory surveys were conducted in 1982 on the whole of the watershed. Post-harvest surveys were conducted in 1990, 1994 and every 5 years thereafter. This dataset was collected in summer of 1990. Survey methods differed between years due to the variability encountered in the aggrading forest. 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 by the USDA Forest Service, Northern Research Station.

Forest Inventory of a Whole Tree Harvest: Hubbard Brook Experimental Forest Watershed 5, 1994, 10 years post-harvest

A whole-tree harvest was conducted during the dormant season of 1983-1984 in order assess ecosystem response to whole-tree logging operations. Pre-harvest forest inventory surveys were conducted in 1982 on the whole of the watershed. Post-harvest surveys were conducted in 1990, 1994 and every 5 years thereafter. This dataset was collected in summer of 1994. Survey methods differed between years due to the variability encountered in the aggrading forest. 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 by the USDA Forest Service, Northern Research Station.

Forest Inventory of a Whole Tree Harvest: Hubbard Brook Experimental Forest Watershed 5, 1999, 15 years post-harvest

A whole-tree harvest was conducted during the dormant season of 1983-1984 in order assess ecosystem response to whole-tree logging operations. Pre-harvest forest inventory surveys were conducted in 1982 on the whole of the watershed. Post-harvest surveys were conducted in 1990, 1994 and every 5 years thereafter. This dataset was collected in summer of 1999. Survey methods differed between years due to the variability encountered in the aggrading forest. 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 by the USDA Forest Service, Northern Research Station.

Hubbard Brook Experimental Forest Watershed 1 Temporal Canopy Leaf Chemistry, 1999 - 2002

Overstory foliage is collected in late summer from calcium-treated forest on watershed 1. Nutrient concentrations in foliage are measured. This allows us to estimate the pool of nutrients in foliage in combination with litterfall estimates of foliage biomass. We can compare foliar chemistry in W1 with that in W6 to quantify calcium treatment effects. Long-term measurements continue with the aim of detecting trends in foliage chemistry over long time scales. 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 by the USDA Forest Service, Northern Research Station.

Leaf area index following the ice storm of January 1998 at the Hubbard Brook Experimental Forest

This dataset includes measurements of changes in Leaf Area Index (LAI) collected as part of a long-term study of the recovery of the forest canopy following the ice storm of January 1998. Measurements were taken in Watershed 1 and Watershed 6 between July 1998 and July 2006. 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 by the USDA Forest Service, Northern Research Station.

Fine root production and mortality from minirhizotrons at the Hubbard Brook Experimental Forest

This data set reports observations of fine root growth, mortality and lifespan in the mature forest. The lifespan data can be combined with fine root biomass data to estimate fine root production in the forests (Fahey et al. 2005). This data set was from reference plots for a snow manipulation experiment and the results are summarized in Tierney et al. (2001). 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 by the USDA Forest Service, Northern Research Station.

Continuous Revegetation Survey Data, Watershed 5, Hubbard Brook Experimental Forest, 1984 - 1989

During the first five years after harvest of Watershed 5, detailed measurements of recovering vegetation were conducted on a large set of permanent plots. Results are summarized in Hughes and Fahey (1991) and Pu et al. (1993). Measurements on these plots were discontinued in 1989 and replaced by measurements on a smaller set of larger plots. Those data are not included in this dataset. 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 by the USDA Forest Service, Northern Research Station.

Tree Core Increment Data, Watershed 4, Hubbard Brook Experimental Forest, 1985-1986

Time series of annual tree ring increments were collected on Watershed 4 during the winter of 1985-1986 for trees of four species: beech, white ash, yellow birch, and sugar maple. The purpose of the study was to compare these time series with a selection of measured and derived environmental variables to develop a more sensitive model of tree diameter growth. 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 by the USDA Forest Service, Northern Research Station.

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

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 available. No soil temperature data were collected from the last Colman reading in 1998 until the start of a new network collocated with the Colman plots. Two sets of hydroprobes run from a SCAN site (Soil Climate and Analysis Network operated by the NRCS) were placed at the original depths and as close as possible to the original location. Hubbard Brook SCAN data are now available at the NRCS SCAN website from 2002 – present and serve to extend the soil temperature dataset first initiated in 1959 in to the future. 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 by the USDA Forest Service, Northern Research Station.

Quantitative Pit Soil Carbon and Nitrogen on Watershed 5 at the Hubbard Brook Expermental Forest, 1983-1998

We sampled soils prior to the whole-tree harvest of watershed 5 at Hubbard Brook Experimental Forest in 1983, and again in 1986, 1991, and 1998, using the quantitative soil pit method. Here we report soil mass, C and N concentrations, and loss-on-ignition for each horizon in each of the 239 soil pits excavated over the four sampling years. 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 by the USDA Forest Service, Northern Research Station.

Hubbard Brook Experimental Forest: Mirror Lake Thermal Profiles 1981 - 2011

Numerous studies have been conducted on Mirror Lake since the mid-1960s, including extensive physical, chemical, biological, and paleoecological research (Likens 1985). This data set includes thermal profiles consisting of temperatures measured at discrete depths. Measurements were made using a hand-held instrument from a boat at an anchored buoy station located at the deepest part (11 m at full pool) of Mirror Lake during the open water (ice-free) season. 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 by the USDA Forest Service, Northern Research Station.

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Hubbard Brook Experimental Forest USGS 40ft Contours: GIS Shapefile

USGS 7.5' Topographic Quadrangles; Mount Kineo, NH - 1973, Woodstock, NH 1980. Contours at 40ft intervals were manually digitized. Data distributed as shapefile in Coordinate system EPSG:26919 - NAD83 / UTM zone 19N

Hubbard Brook site, station Grafton County, NH (FIPS 33009), study of county area in units of squareKilometers on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains county area measurements in squareKilometers units and were aggregated to a yearly timescale.

Hubbard Brook site, station Grafton County, NH (FIPS 33009), study of number of farms in units of number on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains number of farms measurements in number units and were aggregated to a yearly timescale.

Hubbard Brook site, station Grafton County, NH (FIPS 33009), study of farmland acres (total) in units of acre on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains farmland acres (total) measurements in acre units and were aggregated to a yearly timescale.

Hubbard Brook site, station Grafton County, NH (FIPS 33009), study of population employed in commerce (percent of total) in units of percent on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains population employed in commerce (percent of total) measurements in percent units and were aggregated to a yearly timescale.

Hubbard Brook site, station Grafton County, NH (FIPS 33009), study of population employed at farms (percent of total) in units of percent on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains population employed at farms (percent of total) measurements in percent units and were aggregated to a yearly timescale.

Hubbard Brook site, station Grafton County, NH (FIPS 33009), study of population employed in manufacturing (percent of total) in units of percent on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains population employed in manufacturing (percent of total) measurements in percent units and were aggregated to a yearly timescale.