acidic tussock tundra

AON Imnavait
Abstract
M. Syndonia Bret-Harte, Eugenie Euskirchen, Gaius Shaver, 2017 Eddy Flux Measurements, Fen Station, Imnavait Creek, Alaska - 2015. 10.6073/pasta/0c1736202ade8cd1acf9a29fa7f4da63
In contribution to the Arctic Observing Network, the researchers have established two observatories of landscape-level carbon, water and energy balances at Imnaviat Creek, Alaska and at Pleistocene Park near Cherskii, Russia.  These will form part of a network of obervatories with Abisko (Sweden), Zackenburg (Greenland) and a location in the Canadian High Arctic which will provide further data  points as part of the International Polar Year.  This particular part of the project focuses on simultaneous measurements of carbon, water and energy fluxes of the terrestrial landscape at hourly, da
M. Syndonia Bret-Harte, Eugenie Euskirchen, Kevin Griffin, Gaius Shaver, 2018 Eddy Flux Measurements, Tussock Station, Imnavait Creek, Alaska - 2016. 10.6073/pasta/000c00519355c08c59ed45494be8fd80
The Biocomplexity Station, now known as the Tussock Station, was established in 2005 to measure landscape-level carbon, water and energy balances at Imnavait Creek, Alaska.  The station is now contributing valuable data to the Arctic Observing Network that was established at two nearby stations.  These will form part of a network of observatories with Abisko (Sweden), Zackenburg (Greenland) and a location in the Canadian High Arctic which will provide further data points as part of the International Polar Year.  This particular part of the project focuses on simultaneous measurements of car
M. Syndonia Bret-Harte, Eugenie Euskirchen, Kevin Griffin, Gaius Shaver, 2018 Eddy Flux Measurements, Tussock Station, Imnavait Creek, Alaska - 2015. 10.6073/pasta/2ffd814b0953d1147a59e62888ad977b
The Biocomplexity Station, now known as the Tussock Station, was established in 2005 to measure landscape-level carbon, water and energy balances at Imnavait Creek, Alaska.  The station is now contributing valuable data to the Arctic Observing Network that was established at two nearby stations.  These will form part of a network of observatories with Abisko (Sweden), Zackenburg (Greenland) and a location in the Canadian High Arctic which will provide further data points as part of the International Polar Year.  This particular part of the project focuses on simultaneous measurements of car
M. Syndonia Bret-Harte, Eugenie Euskirchen, Kevin Griffin, Gaius Shaver, 2019 Eddy Flux Measurements, Tussock Station, Imnavait Creek, Alaska - 2017. 10.6073/pasta/93e9a05b00e0e619b3942472ba1f7796
The Biocomplexity Station was established in 2005 to measure landscape-level carbon, water and energy balances at Imnavait Creek, Alaska. The station is now contributing valuable data to the Arctic Observing Network that was established at two nearby stations. These will form part of a network of observatories with Abisko (Sweden), Zackenburg (Greenland) and a location in the Canadian High Arctic which will provide further data points as part of the International Polar Year.
M. Syndonia Bret-Harte, Eugenie Euskirchen, Kevin Griffin, Gaius Shaver, 2019 Eddy Flux Measurements, Tussock Station, Imnavait Creek, Alaska - 2018 - Provisional. 10.6073/pasta/bf5b2104c5bda4284b84dee76e5fdfd9
The Biocomplexity Station was established in 2005 to measure landscape-level carbon, water and energy balances at Imnavait Creek, Alaska. The station is now contributing valuable data to the Arctic Observing Network that was established at two nearby stations. These will form part of a network of observatories with Abisko (Sweden), Zackenburg (Greenland) and a location in the Canadian High Arctic which will provide further data points as part of the International Polar Year.
Burn Terrestrial Data
Abstract
Adrian V Rocha, 2020 Soil nutrient availability from the 2007 Anaktuvuk River, Alaska, USA fire scar during the 2016 growing season. 10.6073/pasta/e01c5678f825642da7d69260614bdcc2
This file contains plant-available
Adrian V Rocha, 2020 Leaf area index (LAI) recorded from a nitrogen (N), phosphorus (P) and N+P fertilization experiment at the 2007 Anaktuvuk River, Alaska, USA fire scar during the 2016-2019 growing seasons. 10.6073/pasta/06559231aa04fd7fecd661f107985c8f
This file contains leaf area index (LAI) measurements from an  nitrogen (N), phosphorus (P)
Adrian V Rocha, 2020 Point-frame measurments from a nitrogen (N), phosphorus (P) and N+P fertilization experiment at the 2007 Anaktuvuk River, Alaska, USA fire scar during the 2016-2019 growing seasons. 10.6073/pasta/c28d78e8a3c11b52b38cf1f1c01dc671
This file contains point-frame measurements from a
Adrian V Rocha, 2021 Tussock height and diameter in moist acidic tussock tundra at the site of the 2007 Anaktuvuk River fire scar, and nearby unburned tundra measured in 2016. 10.6073/pasta/1dccd3fdb3aa693f9c2b69a24f8306ed
This dataset consists of Eriophorum vaginatum tussock height and width (diameter) measurements, and was used to evaluate differences in physical strucutre of previously burned tundra (2007 Anaktuvuk River fire) and nearby unburned tundra. At each site, all tussocks that intersected four 100 meter transects were measured from soil surface to tussock top in four cardinal directions, and diameter was measured in two directions.
Adrian V Rocha, 2021 Tussock (Eriophorum vaginatum) density, mortality, and rodent-herbivore activity in moist acidic tussock tundra at the site of the 2007 Anaktuvuk River fire and nearby unburned tundra, measured in 2019. 10.6073/pasta/d25053a5e3d579321688f20558e96753
This dataset consists of tussock density, mortality rates and causes, and an assesment of rodent-herbivore activity levels in previously burned (2007 Anaktuvuk River fire) and unburned tussock tundra. Eriophourm vaginatum tussocks were counted every meter within a 1 square meter quadrat along three transects. Cause of tussock mortality, as well as level of rodent herbivory was assessed for each tussock, and rodent herbivore activity was assessed for each quadrat.
Adrian V Rocha, 2021 Leaf area index (LAI) by plant functional group in moist acidic tussock tundra, at the 2007 Anaktuvuk River fire scar measured in 2017. 10.6073/pasta/b844dc9b8092d7ceaffcaf80aa095ad2
This file contains leaf area index (LAI) based on biomass measurements from an aboveground pluck in the southern portion of the Anaktuvuk River fire scar, and a nearby unburned site in late July 2017. Vegetation was sampled randomly at 10-m intervals along two 100 meter transects at both the burned and unburned sites. Vegetation was sampled within a 10X40 cm quadrat to the mineral layer, and plant material was sorted into new and old aboveground leaf and woody biomass by species.
Adrian V Rocha, 2021 Point-frame measurement of maximum canopy height for plant growth forms at the 2007 Anaktuvuk River Fire scar measured in 2019.. 10.6073/pasta/7afab2d1a528adc58b4a8f6c7d6216f5
This file contains maximum plant heights from point frame measurements made in the southern section of the 2007 Anaktuvuk River fire scar, at a severely burned site and a nearby unburned site. Pin-vegetation contact was recorded using a 0.56 m2 frame with 41 evenly spaced sampling points. Data were collected during peak green in summer 2019.
Rebecca Rowe, 2021 Small mammal captures per 100 trap nights at the 2007 Anaktuvuk River fire scar and nearby unburned site, sampled in 2014, 2017-2019.. 10.6073/pasta/bf951abfd3b0c3c2946b411a2a2d93aa
Small mammals (rodents and shrews) were sampled 7-12 years following the Anaktuvuk River Fire to examine how post-fire ecological changes influence small mammal abundance. Small mammals were snap-trapped in August 2014, 2017-2019 at the site of the 2007 Anaktuvuk River Fire, and a nearby unburned control site. At each site, 120 traps were set in 3 parallel lines spaced 40m apart. Each trap was spaced 10m apart, baited, and set to rodent sign within one meter of the trap station. Traps were checked the following two mornings with all captures collected and sprung traps reset.
Laura Gough, 2021 Eriophorum vaginatum tiller nitrogen content at the 2007 Anaktuvuk River fire scar and nearby unburned tundra measured in 2019.. 10.6073/pasta/0daf62f03df4ebad013eb7849ba55e01
Tillers from 24 Eriophorum vaginatum individuals were sampled in late July 2019 to examine differences in percent nitrogen between previously burned (Anaktuvuk River Fire) and unburned tussocks at a nearby unburned control site. At the burned site tussocks exhibiting evidence of rodent grazing were also sampled to separate herbivore effects from those of the fire. From each tussock, 3-4 new leaves were sampled (as indicated by lack of brown tips) and dried at 60°C for 24 hours, before being ground and analyzed for percent nitrogen.
Adrian V Rocha, 2021 Eriophorum vaginatum rhizome nitrogen content from the 2007 Anaktuvuk River fire scar measured in 2019.. 10.6073/pasta/2a1668c035b2b3f973e6d60b2084d12f
This file contains Eriophorum vaginatum rhizome biomass from a 2017 biomass pluck of previously burned tundra (2007 Anaktuvuk River Fire) and nearby unburned tundra. Rhizome biomass from the pluck was combined with rhizome percent nitrogen estimates (2.47% at the Anaktuvuk River Fire, and 1.05% at the nearby unburned site) to estimate grams of nitrogen per meter squared, to evaluate differences in winter forage quality for the rodent herbivore, Microtus oeconomus. Percent nitrogen estimates were derived from pooled rhizome samples collected from the two sites in late 2018.
Fire in the Arctic Landscape
Abstract
Adrian V Rocha, 2021 Comparison of vole-grazed and ungrazed Eriophorum vaginatum tussock biomass at the 2007 Anaktuvuk River fire scar in 2019. 10.6073/pasta/6b2e708573a8e2a567be975794d7e657
This file contains biomass measurements from vole-grazed and ungrazed Eriophorum vaginatum tussocks taken from the 2007 Anaktuvuk River Fire scar in 2019. Rodent-grazed and ungrazed tussocks were harvested to assess the impact voles have on biomass. Eighteen grazed tussocks and seven ungrazed tussocks were harvested and taken back to the lab. Ungrazed tussocks were subsampled to make seperation faster. Eight additional ungrzed tussocks were measured in the field and biomass estimates were made using allometry equations based on diameter.
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