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Anaktuvuk River Burn Eddy Flux Measurements, 2012 Moderate Burn Site, North Slope Alaska
We deployed three eddy covariance towers along a burn severity gradient (i.e. severely-, moderately-, and un-burned tundra) to monitor post fire Net Ecosystem Exchange of CO2 (NEE) within the large 2007 Anaktuvuk River fire scar during the summer of 2008. This data represents the 2012 post fire energy and mass exchange at the moderate burn site.
Anaktuvuk River Burn Eddy Flux Measurements, 2012 Unburned Site, North Slope Alaska
We deployed three eddy covariance towers along a burn severity gradient (i.e. severely-, moderately-, and un-burned tundra) to monitor post fire Net Ecosystem Exchange of CO2 (NEE) within the large 2007 Anaktuvuk River fire scar during the summer of 2008. This data represents the 2012 post fire energy and mass exchange at the unburned site.
Plant % cover by functional type for the ITEX CO2 flux survey plots at Toolik, Alaska; Abisko, Sweden; Svalbard, Norway; Zackenberg, Northeast Greenland; Anaktuvuk River Burn, Alaska and Barrow, Alaska 2003-2009.
Estimated aerial plant % cover by functional type in flux plots measured during the ITEX cirumarctic flux survey 2004-2006. Survey plots were located in the Toolik Lake LTER fertilization experiment in Alaska; at Imnavait Creek, Alaska; at Paddus, Latnjajaure and the Stepps site near Abisko in northern Sweden; at various sites in Adventdalen, Svalbard; in the Zackenberg valley, Northeast Greenland; at BEO near Barrow, Alaska and at the Anaktuvuk River Burn in Alaska. Measurements were made during the growing seasons 2003 to 2009.
ITEX circumarctic CO2 flux survey data from Toolik, Alaska; Abisko, Sweden; Svalbard, Norway; Zackenberg, Northeast Greenland; Anaktuvuk River Burn, Alaska and Barrow, Alaska 2003-2009.
Ecosystem CO2 flux light response curves were measured on 1m x 1m plots across the arctic. This file contains the CO2 and H2O flux measurements and NDVI data for each plot. Survey plots were located in the Toolik Lake LTER fertilization experiment in Alaska; at Imnavait Creek, Alaska; at Paddus, Latnjajaure and the Stepps site near Abisko in northern Sweden; at various sites in Adventdalen, Svalbard; in the Zackenberg valley, Northeast Greenland; at BEO near Barrow, Alaska and at the Anaktuvuk River Burn in Alaska. Measurements were made during the growing seasons 2003 to 2009.
Tree regeneration after fire: Delta 1994 burn surveys, general site data
Data for this study were collected in 2001 and 2002 by Jill Johnstone (University of Alaska Fairbanks) and Eric Kasischke (University of Maryland). Sites were located within the perimeter of the 1994 burn southeast of Delta Junction Alaska, USA, bordering the Alaska Highway to the North and the Gerstle River to the West. Sites were selected from satellite classifications prepared by Eric Kasischke to represent different levels of burn severity and post-fire vegetation canopy greenness (NDVI). Site selection was constrained by road access, and only areas where all trees had been killed by the fire were selected. At each site, a central point was located in an area of visually homogeneous vegetation. Five parallel transects, each 50 m long, were laid out as follows: 1) the first transect started at the central point and followed a randomly-selected compass direction, 2) two additional transects were established parallel to the first, but at a random distance from the central transect up to 25 m distant. Vegetation was sampled in a 2-m wide belt centered on each transect, and soil samples were made at intervals along the transect line. Vegetation measurements included: a) basal diameters of all pre-fire trees greater than 1.3 m in height, b) counts of all post-fire tree seedlings, and c) basal diameters of tree seedlings and willows, measured in a randomly chosen 5x2 m portion of each transect. General notes were made on visual percent cover of different vegetation growth forms at the site. Destructive measurements of tree seedlings and willows made in 2001 were used to develop allometric equations to predict dry biomass from basal diameter. Measurements of soil organic layer depth were made at 5 m intervals with the use of a spade to excavate small chunks of sod. At one randomly-selected sample point per transect, a 10x10 cm sample of the organic layer was collected for bulk density measurements. Bulk density samples were dried in a 60degC oven for 48 hours and then w
Organic layer data from burned black spruce stands for the effects of variations in post-fire organic layer thickness studies in the Delta Junction region, 1995-2003
This database contains data on the total depth of the surface organic layer remaining after fire for the study plots used in an analysis of variations in the depths of surface organic layers found in burned and unburned black spruce stands, and the effects of variations in depth of burning on soil temperature and moisture, and organic layer carbon stocks. Data for the overall study were collected between 1995 and 2003 by Eric Kasischke (University of Maryland), Kathy O?Neill (Duke University), and Jill Johnstone (University of Alaska Fairbanks). Sites were located in burned black spruce stands within the perimeters of three recent fires (1987, 1994, and 1999), unburned black spruce stands adjacent to the burned stands, and within one black spruce stand that burned in 1956. The three fires were: (a) the 1987 Granite Creek fire located 15 km to the east of Delta Junction, Alaska USA, bordering the Alaska Highway on the North and Jarvis Creek on the south; the 1994 Hajdukovich Creek fire located 45 km southeast of Delta Junction Alaska, USA, bordering the Alaska Highway to the North and the Gerstle River to the West, and the 1999 Donnelly Flats fire, located 8 km south of Delta Junction, bordering Jarvis Creek to the east and the Richardson Highway on the west. Data that were collected and are in databases associated with this project include: (1) organic layer depths in burned stands; (2) organic layer depths in unburned stands; (3) basal diameters of overstory trees in unburned stands and distance measures that can be used to estimate stand density; (4) mineral soil temperature and moisture data in burned stands; (5) mineral soil temperature and moisture data in unburned stands; and (6) bulk density and percent carbon data from different organic layers in unburned stands.
Mineral soil moisture and temperature data from burned stands used in the effects of variations in post-fire organic layer thickness studies in the Delta Junction region, 1995-2003
This database contains measurements of mineral soil temperature and moisture collected in burned stands as part of an analysis of variations in the depths of surface organic layers found in burned and unburned black spruce stands, and the effects of variations in depth of burning on soil temperature and moisture, and organic layer carbon stocks. Data for the overall study were collected between 1995 and 2003 by Eric Kasischke (University of Maryland), Kathy O?Neill (Duke University), and Jill Johnstone (University of Alaska Fairbanks). Sites were located in burned black spruce stands within the perimeters of three recent fires (1987, 1994, and 1999), unburned black spruce stands adjacent to the burned stands, and within one black spruce stand that burned in 1956. The three fires were: (a) the 1987 Granite Creek fire located 15 km to the east of Delta Junction, Alaska USA, bordering the Alaska Highway on the North and Jarvis Creek on the south; the 1994 Hajdukovich Creek fire located 45 km southeast of Delta Junction Alaska, USA, bordering the Alaska Highway to the North and the Gerstle River to the West, and the 1999 Donnelly Flats fire, located 8 km south of Delta Junction, bordering Jarvis Creek to the east and the Richardson Highway on the west. Data that were collected and are in databases associated with this project include: (1) organic layer depths in burned stands; (2) organic layer depths in unburned stands; (3) basal diameters of overstory trees in unburned stands and distance measures that can be used to estimate stand density; (4) mineral soil temperature and moisture data in burned stands; (5) mineral soil temperature and moisture data in unburned stands; and (6) bulk density and percent carbon data from different organic layers in unburned stands.
Soil Respiration in burned and unburned areas in and around watershed C4 within the Caribou-Poker Creeks Research Watershed from 1998-2004
This database reports soil respiration before and after the 1999 Frostfire experimental burn in watershed C4 of the Caribou-Poker Creeks Research Watershed. We measured soil respiration in three replicate pairs of sites (planned burned, control) in two vegetation types (black spruce, mixed hardwoods) using a LiCor 6262 infrared gas analyzer attached to semi-automated chambers (3 replicate chambers per site). Measurements began in summer 1998 and continued each growing season through 2004; in addition, we measured winter respiration during winter 1998-1999 using a different chamber design on top of the snow pack. All of the black spruce sites were located on Helmer's Ridge; the mixed hardwood sites initially were located on the east side of the C4 watershed or just outside its eastern boundary. Following the 1999 fire, all of the mixed hardwood sites were moved burned and unburned areas near the main trail ascending Helmer's Ridge.
Fire Severity Estimates: 2001 Survey Line Burn
Field-based estimates of fire severity for 85 plots located near the Tanana River in the Survey Line Burn. Composite Burn Index estimates were taken during June-August 2002. The locations of each plot are stored as differentially corrected GPS files and as an ArcGIS point shapefile. Digital aerial photography of the post-fire area from August and September 2002 are in the data base. Database also includes remotely sensed fire severity indices of the entire Survey Line Burn including the Normalized Burn Ratio from a 21-July-2002 Landsat ETM+ image and the differenced Normalized Burn Ratio from a 6-June-2001 pre-fire Landsat ETM+ image and the post-fire 21-July-2002 Landsat ETM+ image.
Alaska 2004 Burns: Environmental and stand data for sites located in the 2004 burns off the Steese, Taylor, and Dalton Highways, collected in 2005-2011
This dataset contains site-level descriptions of environmental data (latitude, slope, aspect, moisture, soil pH and texture), pre-fire stand characteristics (tree density and basal area by species), and fire conditions from the 2004 fires (estimates of canopy and surface fire severity, including CBI, plus estimated stand age, date of burning, and distances to live seed sources). Each sample unit represents a site, and values often are site-level means of sub-samples. These data provide an initial baseline of environmental and fire conditions that can be used in interpreting long-term patterns of vegetation responses at the sites.
Black spruce seed counts from seed rain traps in the 2004 burns off the Steese, Taylor, and Dalton Highways, collected in 2005-2007.
This dataset contains seed counts of black spruce seed rain collected in traps at 39 intensive study sites within the 2004 burns of interior Alaska. Data are presented as raw data from trap collections at each site. All sites were in communities dominated by black spruce before burning, and were located 100 to 600 m from the road, beyond the range of any visible road effects and away from any signs of other human disturbance.
Black spruce seed viability from seed rain traps in the 2004 burns off the Steese, Taylor, and Dalton Highways, collected in 2005-2007.
This dataset contains viability estimates of black spruce seed collected in traps at 39 intensive study sites within the 2004 burns of interior Alaska. Data are presented as raw data from trap collections at each site. All sites were in communities dominated by black spruce before burning, and were located 100 to 600 m from the road, beyond the range of any visible road effects and away from any signs of other human disturbance.
Organic layer thickness measurements from burned and unburned black spruce forests in Alaska collected between 1994 and 2012
This dataset contains organic layer thickness measurements collected in mature burned and unburned black spruce stands located throughout interior Alaska. These data were collected as part of a number of studies between 1994 and 2012 in order to quantify variations in organic layer thickness and estimate organic layer carbon in burned and unburned black spruce stands. Data were collected in sites located on a number of topographic positions, and collected in sites that burned during different time periods during the fire season. Measurements that were collected at most sites included either the total thickness of the surface organic layer, or the thickness of individual layers within the organic layer. These layers include: moss (including green and brown), fibric soil, mesic soil, humic soil, and char. Beginning in 2005, data on the height of adventitious roots above mineral soil were collected and used to estimate the pre-burn organic layer thickness.
Far northeastern Siberia boreal forest data: Thaw depth within experimental burn plots
This dataset includes thaw depth for two growing seasons (2012 and 2013) within experimental burn plots in far northeastern Cherskii. Data have not been published.
Far northeastern Siberia boreal forest data: Mean soil temperature within experimental burn plots
This dataset includes soil temperature (10-cm depth) during July-Sept 2013 within experimental burn plots in far northeastern Cherskii. Data have not been published.
Far northeastern Siberia boreal forest data: Larch recruitment within experimental burn plots
This dataset includes larch recruitment during summer 2013 within experimental burn plots in far northeastern Cherskii. Data have not been published.
Tree growth (height and average basal area increment) and herbivory measurements 20 years after the 1994 Hajdukovich Creek burn
This dataset contains height, diameter at breast height, and average basal area increment of aspen and black spruce from historical sites established in the Hajdukovich Creek burn. 12 pre-established sites were used, 6 from both low and high fire severity. Sites were sampled in 2014, 20 years after the fire. Furthermore, for each individual the distance from sampling point (plotless density), levels of past herbivory, health, basal age (number of tree rings visible from basal disk), age of the tree at 3 meters height, and age and height of some collected twig clusters (evidence of past herbivory) is included.
Tree ring widths of trembling aspen and black spruce that regenerated after the 1994 Hajdukovich Creek burn
This dataset contains the average annual ring widths of trembling aspen and black spruce regenerating in low and high fire severity sites within the 1994 Hajdukovich Creek burn. 12 pre-established sites were used, 6 from both low and high fire severity. Sites were sampled in 2014, 20 years after the fire.
Tree regeneration after fire: Delta 1994 burn surveys, data to develop allometric equations re. seedling height or diameter to dry biomass
Data for this study were collected in 2001 and 2002 by Jill Johnstone (University of Alaska Fairbanks) and Eric Kasischke (University of Maryland). Sites were located within the perimeter of the 1994 burn southeast of Delta Junction Alaska, USA, bordering the Alaska Highway to the North and the Gerstle River to the West. Sites were selected from satellite classifications prepared by Eric Kasischke to represent different levels of burn severity and post-fire vegetation canopy greenness (NDVI). Site selection was constrained by road access, and only areas where all trees had been killed by the fire were selected. At each site, a central point was located in an area of visually homogeneous vegetation. Five parallel transects, each 50 m long, were laid out as follows: 1) the first transect started at the central point and followed a randomly-selected compass direction, 2) two additional transects were established parallel to the first, but at a random distance from the central transect up to 25 m distant. Vegetation was sampled in a 2-m wide belt centered on each transect, and soil samples were made at intervals along the transect line. Vegetation measurements included: a) basal diameters of all pre-fire trees greater than 1.3 m in height, b) counts of all post-fire tree seedlings, and c) basal diameters of tree seedlings and willows, measured in a randomly chosen 5x2 m portion of each transect. General notes were made on visual percent cover of different vegetation growth forms at the site. Destructive measurements of tree seedlings and willows made in 2001 were used to develop allometric equations to predict dry biomass from basal diameter. Measurements of soil organic layer depth were made at 5 m intervals with the use of a spade to excavate small chunks of sod. At one randomly-selected sample point per transect, a 10x10 cm sample of the organic layer was collected for bulk density measurements. Bulk density samples were dried in a 60degC oven for 48 hours and then w
Tree regeneration after fire: Delta 1994 burn surveys, thickness of different soil layers
Data for this study were collected in 2001 and 2002 by Jill Johnstone (University of Alaska Fairbanks) and Eric Kasischke (University of Maryland). Sites were located within the perimeter of the 1994 burn southeast of Delta Junction Alaska, USA, bordering the Alaska Highway to the North and the Gerstle River to the West. Sites were selected from satellite classifications prepared by Eric Kasischke to represent different levels of burn severity and post-fire vegetation canopy greenness (NDVI). Site selection was constrained by road access, and only areas where all trees had been killed by the fire were selected. At each site, a central point was located in an area of visually homogeneous vegetation. Five parallel transects, each 50 m long, were laid out as follows: 1) the first transect started at the central point and followed a randomly-selected compass direction, 2) two additional transects were established parallel to the first, but at a random distance from the central transect up to 25 m distant. Vegetation was sampled in a 2-m wide belt centered on each transect, and soil samples were made at intervals along the transect line. Vegetation measurements included: a) basal diameters of all pre-fire trees greater than 1.3 m in height, b) counts of all post-fire tree seedlings, and c) basal diameters of tree seedlings and willows, measured in a randomly chosen 5x2 m portion of each transect. General notes were made on visual percent cover of different vegetation growth forms at the site. Destructive measurements of tree seedlings and willows made in 2001 were used to develop allometric equations to predict dry biomass from basal diameter. Measurements of soil organic layer depth were made at 5 m intervals with the use of a spade to excavate small chunks of sod. At one randomly-selected sample point per transect, a 10x10 cm sample of the organic layer was collected for bulk density measurements. Bulk density samples were dried in a 60degC oven for 48 hours and then w
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.