biological substances
| Abstract | |
|---|---|
| Gaius Shaver, 2022 Above ground plant biomass in a mesic acidic tussock tundra experimental site 2015, Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/c733e2d9526616a20711f3856840344a |
Above ground plant biomass and leaf area were measured in a tussock tundra experimental site. The plots were set up in 1981 and have been harvested in previous years (See Shaver and Chapin Ecological Monographs, 61(1), 1991 pp.1-31.) This file contains the biomass numbers for each harvested quadrat and per cent carbon and nitrogen and phosphorous summaries for control and fertilized plots. |
| 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 Soil nutrient availability from the 2007 Anaktuvuk River, Alaska, USA fire scar during the 2019 growing season. 10.6073/pasta/76b71bb30f3a2c809eee79ac2023f652 |
This file contains plant-available |
| Abstract | |
|---|---|
| William "Breck" Bowden, 2013 Substrate and cover types on the stream bottom determined by point transects for streams near the Toolik Field Station, Alaska, for 2010.. 10.6073/pasta/a3de00f9b8f9d563e8bb2fd37e362bb0 |
The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. Point transects were done throughout the sampling season to determine different substrate and cover types on the stream bottom. |
| William "Breck" Bowden, 2013 CSASN TASCC Nutrient additions to streams near Toolik Field Sation, Alaska 2010 to 2012. 10.6073/pasta/a4716dc93844548b60384a899a23e794 |
The Changing Seasonality of Artic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of throughflow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. There were a number of TASCC and Plateau nutrient additions at each sampling location. |
| William "Breck" Bowden, 2013 CSASN Benthic Nutrients from 2010 to 2012 at I8 Inlet, I8 Outlet, Peat Inlet and Kuparuk Rivers. 10.6073/pasta/6c0c54d26b2b4e18fc3f1fb6af6b196d |
The Changing Seasonality of Arctic Stream Systems (CSASN) did extensive arctic stream research from 2010 to 2012. Specifically, the CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and determine how these influences will shift under seasonal conditions that are likely to be substantially different in the future. Throughout the project, samples were collected from Benthic Rock Scrubs and Fine Benthic Organic Matter (FBOM). |
| William "Breck" Bowden, 2013 CSASN Well and Mini-piezomenter Samples. 10.6073/pasta/3597abe9989139bccab4d0d0b51367f0 |
The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. During the project, well and mini-piezometer samples were collected from various depths near stream channels and analyzed for a variety of nutrients. |
| William "Breck" Bowden, 2013 CSASN Channel Nutrients from 2010 to 2012 in I8 Inlet, I8 Outlet, Peat Inlet and Kuparuk Rivers. 10.6073/pasta/d19adb5a8fe01f67806e5afccf283b52 |
The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. During the project, background samples were collected from four stream channels and analyzed for a variety of nutrients. |
| William "Breck" Bowden, 2013 CSASN Nutients: Tracer addition for spiraling curve characterization from 2010 to 2012. 10.6073/pasta/1a99d8b18f6311f5047665cd7c756512 |
The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. There were a number of TASCC and Plateau nutrient additions at each sampling location. |
| William "Breck" Bowden, 2013 Nutrient and tracer amounts for Tracer Additions for Spiraling Curve Characterization studies on arctic streams near Toolik Field Station, Alaska 2010 -2012.. 10.6073/pasta/6b0e4feffc9bf3cc093dd668496d5d1b |
The Changing Seasonality of Arctic Stream Systems (CSASN) was active from 2010 to 2012. The CSASN goal was to quantify the relative influences of through flow, lateral inputs, and hyporheic regeneration on the seasonal fluxes C, N, and P in an arctic river network, and to determine how these influences might shift under seasonal conditions that are likely to be substantially different in the future. There were a number of tracer addition for spiraling curve characterization (TASCC) and Plateau nutrient additions at each sampling location. |
| Abstract | |
|---|---|
| Jay Zarnetske, 2020 High-frequency dissolved organic carbon and nitrate from the Kuparuk River outlet near Toolik Field Station, Alaska, summer 2017-2019. 10.6073/pasta/990958760c13cdd55b574c5202dc19b7 |
Data file describing |
| Jay Zarnetske, William "Breck" Bowden, Benjamin Abbot, 2020 High-frequency dissolved organic carbon and nitrate from the Oksrukuyik Creek outlet near Toolik Field Station,Alaska, summer 2017-2019 . 10.6073/pasta/5d63c098887205597ce0df929467168c |
Data file describing high frequency (every ~10 minutes), optial sensor-derived chemistry of river water from Oksukuyik Creek near Toolik Field Station, North Slope of Alaska. Data file includes date, time, dissolved organic carbon (DOC) concentration, and nitrate concentration. Sensors (V2 s::can uv-vis spectrophotometers) were continuously deployed from June through August or September and optically determined nitrate and dissolved organic carbon concentrations. |
| Jay Zarnetske, William "Breck" Bowden, Benjamin Abbot, 2020 High-frequency dissolved organic carbon and nitrate from the Trevor Creek outlet near Toolik Field Station, Alaska, summer 2017-2019. 10.6073/pasta/3bd6a1d2d9487546f32d46d2943c6e43 |
Data file describing high frequency (every ~10 minutes), optial sensor-derived chemistry of river water from Trevor Creek near Toolik Field Station, North Slope of Alaska. Data file includes date, time, dissolved organic carbon (DOC) concentration, and nitrate concentration. Sensors (V2 s::can uv-vis spectrophotometers) were continuously deployed from June through August or September and optically determined nitrate and dissolved organic carbon concentrations. |
| Benjamin Abbot, 2021 Repeated synoptic watershed chemistry from three watersheds near Toolik Field Station, Alaska, summer 2016-2018 . 10.6073/pasta/258a44fb9055163dd4dd4371b9dce945 |
Data file describing repeated sampling of chemistry of distributed river water from the Kuparuk River, Oksrukuyik Creek, and Trevor Creek watersheds near Toolik Field Station, North Slope of Alaska. Data file includes sampling date, season, sampling point, subcatchment area, and resulting concentrations for a suite of solutes. |
| Abstract | |
|---|---|
| Rose Cory, Jennifer C Bowen, Collin P Ward, George Kling, 2020 Photo-oxidation and photomineralization apparent quantum yield dataset for dissolved organic carbon leached from permafrost soils collected from the North Slope of Alaska, July 2018.. 10.6073/pasta/201f8d4009eec890d937b177da9eb919 |
Dissolved organic carbon (DOC) was leached from permafrost soils near the Toolik Field Station in the Alaskan Arctic and then characterized for its photochemical properties. Oxygen (O2) consumed from photo-oxidation of permafrost DOC was measured as a function of sunlight wavelength, defined as the apparent quantum yield spectrum of photo-oxidation (O2 consumed per mol photon absorbed by DOC). Carbon dioxide (CO2) produced from photomineralization of permafrost DOC was measured as a function of sunlight wavelength, defined as the apparent quantum yield spectrum of photomineralization (CO2 |
| Rose Cory, Jennifer C Bowen, Collin P Ward, George Kling, 2020 Radiocarbon and stable carbon isotopes of CO2 produced from photomineralization of DOC leached from permafrost soils collected from the North Slope of Alaska in the summer of 2018. 10.6073/pasta/ecf54f89183f7bbbb7bd5d931e7323f5 |
Dissolved organic carbon (DOC) was leached from permafrost soils near the Toolik Field Station in the Alaskan Arctic and then characterized for its photochemical properties. The radiocarbon (14C) and stable carbon (13C) isotopic compositions of carbon dioxide (CO2) photochemically produced from permafrost DOC were quantified. |
| Rose Cory, Jennifer C Bowen, Collin P Ward, George Kling, 2020 Preparation of DOC leachates from permafrost soils collected from the North Slope of Alaska in the summer of 2018. 10.6073/pasta/f35194d541f3b55fdd1778e2af52c676 |
Dissolved organic carbon (DOC) was leached from permafrost soils collected from the frozen permafrost layer at five sites underlying moist acidic tussock or wet sedge vegetation, and on three glacial surfaces on the North Slope of Alaska during summer 2018. |
| Rose Cory, Jennifer C Bowen, Collin P Ward, George Kling, 2020 Photomineralization apparent quantum yield at 309 nm for DOC leached from permafrost soils collected from the North Slope of Alaska in the summer of 2015. 10.6073/pasta/489bef4d2aa61e03bb77981605511b1d |
Dissolved organic carbon (DOC) was leached from permafrost soils near the Toolik Field Station in the Alaskan Arctic and then characterized for its photochemical properties. The apparent quantum yield of photomineralization (photochemical carbon dioxide, CO2, production) of permafrost DOC was quantified at 309 nm. |
| Abstract | |
|---|---|
| Ned Fetcher, Jianwu Tang, Michael L Moody, 2019 Quantum yield of Photosystem II of Eriophorum vaginatum leaves in the reciprocal transplant gardens at Toolik Lake, Coldfoot, and Sagwon- Alaska in 2016. 10.6073/pasta/9e35079a41e4e0f9b06ef04f51019f89 |
Quantum yield of Photosystem II estimated from chlorophyll fluorescence of Eriophorum vaginatum leaves from tussocks in the reciprocal transplant gardons at Toolik Lake, Coldfoot, and Sagwon in 2016. A single transplant tussock per plot was repeatedly measured through the season. |
| Jianwu Tang, Ned Fetcher, Michael L Moody, 2019 Absorbed soil nutrients on ion exchange membranes in the reciprocal transplant gardens at Toolik Lake, Coldfoot, and Sagwon in 2016. 10.6073/pasta/86225c3c1a98be0780d092f8b8bf9943 |
Transplant gardens at Toolik Lake and Sagwon were established in 2014. At each location, 60 tussocks each from ecotypes of Eriophorum vaginatum from Coldfoot (CF, 67°15′32″N, 150°10′12″W), Toolik Lake (TL, 68°37′44″N, 149°35′0″W), and Sagwon (SG, 69°25′26″N, 148°42′49″W) were transplanted. At the reciprocal transplant gardens, ion exchange membranes were used to measure nutrient availability over two time periods: Early season (June) and mid season (July). Membranes were deployed in the field for either 20 or 21 days, depending on travel constraints. |
| Abstract | |
|---|---|
| George Kling, Knute Nadelhoffer, Martin Sommerkorn, 2006 Phosphate and ammonium from experiemental plots near Toolik Lake, AK from 2004. 10.6073/pasta/43c22e376bf2074e3218927fb2a4124d |
Soluble reactive phosphorus (SRP) and ammonium in waters from tussock tundra and wet sedge plots near Toolik Lake, AK during the summer of 2004. |
| George Kling, Knute Nadelhoffer, Martin Sommerkorn, 2008 Phosphate and ammonium from experiemental plots near Toolik Lake, AK from 2006. 10.6073/pasta/6f555b30d308ea7ae1752e498d09788a |
Soluble reactive phosphorus (SRP) and ammonium in waters from tussock tundra and wet sedge plots near Toolik Lake, AK during the summer of 2006. |
| George Kling, Knute Nadelhoffer, Martin Sommerkorn, 2005 Phosphate and ammonium from experiemental plots near Toolik Lake, AK from 2003. 10.6073/pasta/cffd6791e79e10709328dcadde388315 |
Soluble reactive phosphorus (SRP) and ammonium in waters from tussock tundra and wet sedge plots near Toolik Lake, AK during the summer of 2003. |
| George Kling, Knute Nadelhoffer, Martin Sommerkorn, 2007 Dissolved organic carbon, phosphate, and ammonium from experiemental plots near Toolik Lake, AK from 2005. 10.6073/pasta/b66f19f933dcc53f6b4a27f481aed665 |
Dissolved organic carbon, SRP, and ammonium in waters from tussock tundra and wet sedge plots near Toolik Lake, AK during the summer of 2005 . |
| Abstract | |
|---|---|
| Mathew Williams, Edward Rastetter, 1999 Measurements of Leaf area, foliar C and N for 14 sites along a transect down the Kuparuk River basin, summer 1997, North Slope, Alaska.. 10.6073/pasta/a5a4d4154e0a8181a5523b4d9c49ed99 |
1997 measurements of Leaf area, foliar C and N for 14 sites along a transect down the Kuparuk River basin, North Slope, Alaska. |
| Laura Gough, 2009 Above ground plant and below ground stem biomass in the Arctic LTER moist acidic tussock tundra experimental plots, 2006, Toolik Lake, Alaska. 10.6073/pasta/5587a6f1bfc4f359c011139b2977d842 |
Above ground plant and below ground stem biomass, percent nitrogen, and percent carbon were measured in the Arctic LTER moist acidic tundra experimental plots. Treatments included control, and nitrogen and phosphorus amended plots for 10 years, and exclosure plots with and without added nitrogen and phosphorus. |
| Laura Gough, 2009 Above ground plant and below ground stem biomass in the Arctic LTER dry heath tundra experimental plots, 2006, Toolik Lake, Alaska. 10.6073/pasta/447aec542efb8fd505b85f90c35ea47e |
Above ground plant and below ground stem biomass, percent nitrogen, and percent carbon were measured in the Arctic LTER dry heath tundra experimental plots. Treatments included control, and nitrogen and phosphorus amended plots for 10 years, and exclosure plots with and without added nitrogen and phosphorus. |
| Donald Schell, 1990 Arctic LTER 1988: del 13C and del 15N ratios measurement for Eriophorum, Carex and lichen species in water tracks at Toolik and Imnavait Creek. 10.6073/pasta/d1771a19979f042e44a1813fe935c426 |
del 13C and del 15N ratios were measured for plant and lichen in watertracks in the Toolik Lake drainage and the east facing slope of the Imnavait Creek area. Sampling locations for each species for a specific date were chosen across an elevation gradient starting from the lakeside and leading to ridge crest. The vegetation was dried and analyzed for stable isotopes. |
| Sarah Hobbie, 2001 Foliar nutrients (N, P, K, Ca, Mg, Al) for dominant species on moist acidic and non-acidic tundra, Arctic LTER, Toolik Field Station , Alaska, 1999.. 10.6073/pasta/09cc986609a5494d901942b69cea037d |
Foliar nutrients (N, P, K, Ca, Mg, Al) for dominant species on moist acidic and non-acidic tundra, Arctic LTER, Toolik Field Station , Alaska, 1999. |
| Mark Harmon, 2002 Long-term Carbon and Nitrogen, and Phosphorus Dynamics of Leaf and Fine Root Litter project (LIDET-Long-term Intersite Decomposition Experiment Team) data for the ARC, Arctic LTER. 1990 to 2000.. 10.6073/pasta/96ee7de35954a3763ab4c244bad0c6f0 |
This file is from the Long-term Carbon and Nitrogen, and Phosphorus Dynamics of Leaf and Fine Root Litter project (LIDET-Long-term Intersite Decomposition Experiment Team). This file contains only the Arctic LTER data. In particular the mass looses over the ten year study. Three types of fine roots (graminoid, hardwood, and conifer), six types of leaf litter (which ranged in lignin/nitrogen ratio from 5 to 75), and wooden dowels were used for litter incubations over a ten year period. |
| Sarah Hobbie, 2002 Foliar and litter nutrients and retranslocation efficiencies (N, P, K, Ca, Mg, Al) for dominant species on moist acidic and non-acidic tundra, Arctic LTER, Toolik Field Station , Alaska, 1999.. 10.6073/pasta/7904f91d28f2782b9ae473b0a6f7203c |
Foliar and litter nutrients and retranslocation efficiencies (N, P, K, Ca, Mg) for dominant species on moist acidic and non-acidic tundra, Arctic LTER, Toolik Field Station , Alaska, 1999. |
| Laura Gough, Sarah Hobbie, 2004 Above ground plant and belowground stem biomass in moist acidic and non-acidic tussock tundra experimental sites, 2001, Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/4195a17564c031686d5b95b551119fd5 |
Above ground plant and belowground stem biomass was measured in moist acidic and non-acidic tussock tundra experimental sites. Treatments sampled were control plots and plots amended with nitrogen and phosphorus. |
| Laura Gough, Sarah Hobbie, 2004 Percent carbon, percent nitrogen, del13C and del15N of above ground plant and belowground stem biomass samples from experimental plots in moist acidic and moist non-acidic tundra, 2000, Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/bdb3eeabb3b26075f0841440e8f92d3a |
Percent carbon, percent nitrogen, del13C and del15N were measured from above ground plant and belowground stem biomass samples from experimental plots in moist acidic and moist non-acidic tundra. Biomass data are in 2000lgshttbm.dat. |
| Gaius Shaver, 1996 June and August plant biomass in mesic acidic tussock tundra, 1992, Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/e4c9bbe7ff8627cf706780e48aa3462a |
Quadrats (20cm x 20cm squares) along a line (block) were collected for plant biomass in mesic tussock tundra. In the lab each quadrat was separated into individual species, new and old aboveground and belowground biomass. Two harvests were completed, June and a late July. These are control plots from an experiment setup for a 15N experiment. |
| Gaius Shaver, Terry Chapin, 1991 Biomass in wet sedge tundra near the Atigun River crossing of the Dalton Highway, North Slope AK, 1982.. 10.6073/pasta/77ca341a7c1f12d8303a99fc8563182f |
Biomass in wet sedge tundra near the Atigun River crossing of the Dalton Highway, North Slope AK. .There were three harvests; Late May-early June; Late July-early August; Late August-early September. See Shaver and Chapin (Ecological Monographs, 61, 1991 pp.1-31. |
| Gaius Shaver, 2004 Biomass, nitrogen and carbon of plants in the Arctic LTER experimental wet sedge tundra experimental sites, 2001, Toolik Lake, Alaska.. 10.6073/pasta/b3407bae411c523f4857753b09f620a0 |
Biomass, nitrogen and carbon of plants in the Arctic LTER experimental wet sedge tundra experimental sites, 2001, Toolik Lake, Alaska.. Treatments at each site included factorial NxP, greenhouse and shade house and were begun in 1985 (Sag site) or in 1988 (Toolik sites). |
| Gaius Shaver, 1990 Arctic LTER 1982: Biomass in tussock tundra near Toolik Lake North Slope AK (68 degrees 38N, 149derees 34W).. 10.6073/pasta/c0d17c3371e88847208dbc0b35f2f8f5 |
Biomass in tussock tundra near Toolik Lake North Slope AK (68 degrees 38N, 149derees 34W). There were three harvests;Late May-early June; Late July-early August; Late August-early September. See Shaver and Chapin (Ecological Monographs, 61(1), 1991 pp.1-31. |
| Gaius Shaver, 1995 Early July plant biomass in mesic acidic tussock tundra, 1993, Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/d72ed65f521fac34139850ef30bef72a |
Quadrats (20cm x 20cm squares) along a line (block) were collected for plant biomass in mesic acidic tussock tundra. Each quadrat was separated into individual species, new and old aboveground and belowground biomass. The harvest occurred in early July to coincide with a 15N plant and soil harvest. |
| Gaius Shaver, 2002 Leaf area for select species was measured in arctic tundra experimental sites from late June into early August,Toolik Field Sattion, Alaska, Arctic LTER 2000.. 10.6073/pasta/13915ef410067ef23bad0faff678319c |
Leaf area for select species was measured in arctic tundra experimental sites from late June into early August. Measurements were made in acidic and non acidic tussock tundra and in shrub tundra in control and fertilized plots. |
| Gaius Shaver, 1989 Biomass in shrub tundra near Toolik Lake North Slope AK (68 degrees 38N, 149derees 34W),1982.. 10.6073/pasta/06fd5df56a2d83c09df1d155479092d5 |
Biomass in shrub tundra near Toolik Lake North Slope AK (68 degrees 38N, 149derees 34W). There were three harvests; Late May-early June; Late July-early August; Late August-early September. See Shaver and Chapin (Ecological Monographs, 61(1), 1991 pp.1-31. |
| Gaius Shaver, 1990 Above ground biomass in acidic tussock tundra experimental site, 1989, Arctic LTER, Toolik, Alaska.. 10.6073/pasta/668dc98c3dbd83a308f0f38fb833f23e |
Above ground plant biomass was measured in a tussock tundra experimental site. The plots were set up in 1981 and have been harvested in previous years (See Shaver and Chapin Ecological Monographs, 61(1), 1991 pp.1-31.) This file contains the biomass numbers for each harvested quadrat. |
| Gaius Shaver, 1998 Plant biomass in heath tundra experimental plots, 1996, Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/4dcc09fd3ea2d757794d13c4727542aa |
Plant biomass in arctic heath experimental plots. Plots set up in 1989 with nitrogen, phosphorus, nitrogen plus phosphorus and a shade treatment were harvested for above ground biomass. Root mass was also measured on a smaller subsample. |
| Gaius Shaver, 2001 Plant biomass in moist acidic tussock tundra experimental small mammal exclosures, 1999 Arctic LTER Toolik, Alaska.. 10.6073/pasta/3180bd090124c3a0d7a498e95685dfac |
Above ground plant and below ground stem biomass was measured in Arctic LTER tussock tundra experimental small mammal exclosures. Treatments included Control, Nitrogen plus Phosphorus with both fenced and unfenced plots. In addition a moist non-acidic tussock tundra site was harvested. Leaf areas were also measured for each quadrat but are in a separate file. |
| Gaius Shaver, 1990 Seasonal plant biomass moist acidic tussock tundra, 1983, Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/f15ef49234144987471d7a10d86d8bc3 |
Biomass in tussock tundra experimental plots near Toolik Lake, North Slope, AK (68 degrees 38N, 149derees 34W). There were five harvests in 1983. This file is the May 21-22, 1983 harvest. |
| Gaius Shaver, 1991 Biomass in heath tundra near Toolik Lake North Slope AK (68 degrees 38N, 149derees 34W), 1982.. 10.6073/pasta/5822d635c5094a1aa9aba29f0692ea49 |
Biomass in heath tundra near Toolik Lake North Slope AK (68 degrees 38N, 149derees 34W). .There were three harvests;Late May-early June; Late July-early August; Late August-early September. See Shaver and Chapin (Ecological Monographs, 61(1), 1991 pp.1-31. |
| Gaius Shaver, 1996 Plant biomass, leaf area, carbon, nitrogen, and phosphorus in wet sedge tundra, 1994, Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/b68ff3f714e72e0528a2d72b2c04aafc |
Plant biomass, leaf area, carbon, nitrogen, and phosphorus were measured in three wet sedge tundra experimental sites. Treatments at each site included factorial NxP and at the Toolik sites greenhouse and shade house. Treatments started in 1985 (Sag site) and in 1988 (Toolik sites). |
| Gaius Shaver, M. Syndonia Bret-Harte, 1998 Weights and lengths from retrospective growth analysis of different stem age classes of Betula nana, 1995, Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/25e6539b3b55340d318a1a6befb82764 |
This data file contains the data on weights and lengths from retrospective growth analysis of different stem age classes of Betula nana ramets from the LTER Nutrient and Warming manipulations in tussock tundra at Toolik Lake. |
| Gaius Shaver, 2002 Above ground plant biomass in a mesic acidic tussock tundra experimental site 2000, Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/24261b22fbd2ebb6bd203ceece4b8859 |
Above ground plant biomass and leaf area were measured in a tussock tundra experimental site. The plots were set up in 1981 and have been harvested in previous years (See Shaver and Chapin Ecological Monographs, 61(1), 1991 pp.1-31.) This file contains the biomass numbers for each harvested quadrat and per cent carbon and nitrogen summaries for control and fertilized plots. Leaf area data is in 2000gsttLA |
| Gaius Shaver, 2006 Above ground plant biomass in a mesic acidic tussock tundra experimental site from 1982 to 2000 Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/c3ef07e6ed81c1fc33e9bc20aff07093 |
Above ground plant biomass and leaf area were measured in a moist acidic tussock tundra experimental site. The plots were set up in 1981 and have been harvested in periodical (See Shaver and Chapin Ecological Monographs, 61(1), 1991 pp.1-31. Mack, et al, Nature 2004 431:440-443) This file contains the biomass numbers for each harvested quadrat and per cent carbon and nitrogen summaries for harvests through 2000. Leaf area data is presented in other data files (see http://ecosystems.mbl.edu/arc). |
| Gaius Shaver, Yuriko Yano, 2009 Bulk concentration and isotopic information of plant C and N in green leaves and tissues collected from Imnavait watershed during 2003-2005. 10.6073/pasta/329191b51f7c934d72974eaf0f9bcff9 |
Changes in total C and N, d13C and d15N, C:N ratio in green leaves and parts of mosses (for sphagnum, both red and green tips were included) over time since 15NH4 addition in Imnavait watershed. |
| Gaius Shaver, 2005 Above ground plant and below ground stem biomass in the Arctic LTER acidic tussock tundra experimental plots, 2002, Toolik Lake, Alaska.. 10.6073/pasta/b227fa1d98ed466ea5fc3816ef5c8ba2 |
Above ground plant and below ground stem biomass was measured in the Arctic LTER acidic tussock tundra experimental plots. Treatments included control, nitrogen plus phosphorus amended plots for either 6 or 13 years and vole exclosure plots with or without amends of nitrogen and phosphorus. |
| Gaius Shaver, 1998 Above ground plant biomass and leaf area of moist acidic tussock tundra 1981 experimental site, Arctic LTER, Toolik Lake, Alaska.1995.. 10.6073/pasta/c8cc8ae964a9f9c68ffbf96cbb61e4e9 |
Above ground plant biomass and leaf area were measured in a tussock tundra experimental site. The plots were set up in 1981 and have been harvested in previous years (See Shaver and Chapin Ecological Monographs, 61, 1991 pp.1-31). |
| Gaius Shaver, 2002 Plant leaf area in Arctic LTER tussock tundra experimental small mammal exclosures.. 10.6073/pasta/ad59eb7b05e4a22138a4d4c27b56f03b |
Leaf areas were measured on quadrats harvested in Arctic LTER tussock tundra experimental small mammal exclosures. Treatments included Control, Nitrogen plus Phosphorus with both fenced and unfenced plots. In addition a moist non-acidic tussock tundra site was harvested. Biomass was also measured for each quadrat but is in a separate file. |
| Gaius Shaver, 1990 Above ground plant biomass a moist acidic tussock tundra experimental site, 1984, Acric LTER, Toolik Lake, Alaska.. 10.6073/pasta/08a91cb2697f7cdc82d654e82b53c5c5 |
Above ground plant biomass was measured in a tussock tundra experimental site. The plots were set up in 1981 and have been harvested in previous years (See Shaver and Chapin Ecological Monographs, 61(1), 1991 pp.1-31.) This file is the July 26-27, 1984 harvest of the controls and nitrogen + phosphorus treatments. |
| Laura Gough, Sarah Hobbie, 2004 Aboveground plant and belowground stem biomass were measured in moist acidic and moist non-acidic tussock tundra experimental plots, Toolik Field Station, Alaska, Arctic LTER 2000.. 10.6073/pasta/6e0b4ea291f4b5940b2b8b80af917bd5 |
Aboveground plant and belowground stem biomass were measured in moist acidic and moist non-acidic tussock tundra experimental plots. Treatments at the acidic site include control and nitrogen (N) plus phosphorus (P) amendments; treatments at the non-acidic site include N, P, N+P, greenhouse warming, and greenhouse+N+P. Note: Version 8 corrected an error where Carex vaginata was listed twice under treatment of "Nitrogen Phosphorus". The tissues with 8 quadrats were "Greenhouse" treatment. |
| Abstract | |
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| George Kling, 2012 Chemistry from thermokarst impacted soils, lakes, and streams near Toolik Lake Alaska, 2008-2011.. 10.6073/pasta/2e55d1587290e642938ac1a6caed6ec6 |
This file contains data collected from thermokarst impacted soils, lakes, and streams near Toolik Lake Alaska. Data are also presented for experimental manipulations of water (e.g., time course experiments). Sample descriptors include a unique sortchem #, site, date, time, depth, distance, elevation, treatment, date-time, category, and water type (e.g., lake, surface, soil). Physical/chemical measures collected in the field include temperature, conductivity, and pH. |
| Abstract | |
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| Jianwu Tang, Ned Fetcher, Michael L Moody, 2019 Ion exchange membrane measure of nutrient availability of the 2015 experimental burn at Toolik Lake Field Station, Alaska 2016 . 10.6073/pasta/ca84cec21de79fd6364d7781374f84eb |
An experimental burn conducted in the summer of 2015 to provide sites for an experiment whether seeds of Eriophorum vaginatum from different ecotypes could establish in recently burned areas. It consisted of ten 2 meter X 2 meter plots along with a similar number of control plots. There was little seedling establishment but other data were collected on the plots. Ion exchange membranes were used to measure nutrient availability over two time periods: Early season (June) and mid season (July). |
| Abstract | |
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| Anne Giblin, George Kling, 1995 Chlorophyll a and primary productivity data for various lakes near Toolik Research Station, Arctic LTER. Summer 1983 to 1989.. 10.6073/pasta/26bc0b31099bafcdf964dd47b0d654ec |
Decadal file describing the chlorophyll a and primary production in various lakes near Toolik Research Station (68 38'N, 149 36'W) during summers from 1983 to 1989. Sample site descriptors include an assigned number (sortchem), site, date of analysis (incubation), time, depth and rates of primary production. The amount of chlorophyll a and pheophytin were also measured. |
| Anne Giblin, George Kling, 2022 Chlorophyll a and primary productivity data for various lakes near Toolik Research Station, Alaska, Arctic LTER. Summer 2010 to 2020. 10.6073/pasta/1981b68e5b34e2a87436cdf76e40b417 |
Decadal file describing the chlorophyll a and primary production in various lakes near Toolik Research Station (68 38'N, 149 36'W) during summers from 2010 to 2020. Sample site descriptors include an assigned number (sortchem), site, date of analysis (incubation), time, depth and rates of primary production. The amount of chlorophyll a and pheophytin were also measured. |
| Anne Giblin, George Kling, 1992 Chlorophyll a and primary productivity data for various lakes near Toolik Research Station, Arctic LTER. Summer 1990 to 1999.. 10.6073/pasta/1b1538449340e68760cf86d92d7082de |
Decadal file describing the chlorophyll a and primary production in various lakes near Toolik Research Station (68 38'N, 149 36'W) during summers from 1990 to 1999. Sample site descriptors include an assigned number (sortchem), site, date of analysis (incubation), time, depth and rates of primary production. The amount of chlorophyll a and pheophytin were also measured. |
| Anne Giblin, George Kling, 1992 Chlorophyll a and primary productivity data for various lakes near Toolik Research Station, Arctic LTER. Summer 2000 to 2009.. 10.6073/pasta/c14fe6e5bb0e2a2c6a74d51a6943c667 |
Decadal file describing the chlorophyll a and primary production in various lakes near Toolik Research Station (68 38'N, 149 36'W) during summers from 2000 to 2009. Sample site descriptors include an assigned number (sortchem), site, date of analysis (incubation), time, depth and rates of primary production. The amount of chlorophyll a and pheophytin were also measured. |
| Abstract | |
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| George Kling, 2013 Biogeochemistry data set for soil waters, streams, and lakes near Toolik on the North Slope of Alaska.. 10.6073/pasta/574fd24522eee7a0c07fc260ccc0e2fa |
Data file describing the biogeochemistry of samples collected at various sites near Toolik Lake, North Slope of Alaska. Sample site descriptors include a unique assigned number (sortchem), site, date, time, depth, distance (downstream), elevation, treatment, date-time, category, and water type (lake, surface, soil). Physical measures collected in the field include temperature (water, soil, well water), conductivity, pH, average thaw depth, well height, discharge, stage height, and light (lakes). |
| George Kling, 2013 Biogeochemistry data set for soil waters, streams, and lakes near Toolik on the North Slope of Alaska, 2011.. 10.6073/pasta/362c8eeac5cad9a45288cf1b0d617ba7 |
Data file describing the biogeochemistry of samples collected at various sites near Toolik Lake, North Slope of Alaska. Sample site descriptors include a unique assigned number (sortchem), site, date, time, depth, distance (downstream), elevation, treatment, date-time, category, and water type (lake, surface, soil). Physical measures collected in the field include temperature (water, soil, well water), conductivity, pH, average thaw depth, well height, discharge, stage height, and light (lakes). |
| George Kling, 2022 Biogeochemistry data set for soil waters, streams, and lakes near Toolik Lake on the North Slope of Alaska, 2012 through 2020. 10.6073/pasta/4e25db9ae9372f5339f2795792814845 |
Data file of the biogeochemistry of samples collected at various sites near Toolik Lake, North Slope of Alaska. Sample site descriptors include a unique assigned number (sortchem), site, date, time, depth, distance (downstream from a reference location), elevation, treatment, date-time, category, and water type (lake, surface, soil). Physical measures collected in the field include temperature (water, soil, well water), conductivity, pH, and average thaw depth in soil. Chemical analyses for the sample include alkalinity; dissolved inorganic and organic carbon (DIC and DOC); dissolved gas |
| Abstract | |
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| William "Breck" Bowden, 2020 Arctic LTER Streams Chemistry Toolik Field Station, Alaska 1978 to 2019.. 10.6073/pasta/3faacd18b63b3bacc5a0dbd6f09660e1 |
Since 1983, the Streams Project at the Toolik Field Station has monitored physical, chemical, and biological parameters in a 5-km, fourth-order reach of the Kuparuk River near its intersection with the Dalton Highway and the Trans-Alaska Pipeline. In 1989, similar studies were begun on a 3.5-km, third-order reach of a second stream, Oksrukuyik Creek. |
| Abstract | |
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| Jennie McLaren, 2018 Relative percent cover was measured for plant species on Arctic LTER experimental plots in moist acidic and non-acidic tundra, Arctic LTER Toolik Field Station, Alaska 2013. . 10.6073/pasta/8a2999c9ed297a184aaca7057e1ae177 |
Relative percent cover was measured for plant species on Arctic LTER experimental plots at Toolik field station in moist acidic and non-acidic tundra. |
| Abstract | |
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| Anne Giblin, George Kling, 1991 Water chemistry data for various lakes near Toolik Research Station, Arctic LTER. Summer 1990 to 1999.. 10.6073/pasta/8db9af4d3fc6f66b200c26cc0256b7f8 |
Decadal file describing the water chemistry in various lakes near Toolik Research Station (68 38'N, 149 36'W) during summers from 1990 to 1999. Chemical analyses were conducted on samples from various depths in the sample lakes either once, or multiple times during the spring, summer and fall months (May to September). |
| Anne Giblin, George Kling, 2001 Water chemistry data for various lakes near Toolik Research Station, Arctic LTER. Summer 2000 to 2009.. 10.6073/pasta/c964a186ed5a58270602ea44f8c3927b |
Decadal file describing the water chemistry in various lakes near Toolik Research Station (68 38'N, 149 36'W) during summers from 2000 to 2009. Chemical analyses were conducted on samples from various depths in the sample lakes either once, or multiple times during the spring, summer and fall months (May to September). |
| Anne Giblin, George Kling, 2022 Water chemistry data for various lakes near Toolik Research Station, Arctic LTER. Summer 2010 to 2021. 10.6073/pasta/35879c60c852eeef54f09e4be8b41042 |
Note: Corrections were made to Particulate phosphorus values. See version 5 notes. |
| Anne Giblin, George Kling, 1985 Water chemistry data for various lakes near Toolik Research Station, Arctic LTER. Summer 1983 to 1989.. 10.6073/pasta/7d30ceaaf64ac5e6bf6a336c17e3ffb1 |
Decadal file describing the water chemistry in various lakes near Toolik Research Station (68 38'N, 149 36'W) during summers from 1983 to 1989. Chemical analyses were conducted on samples from various depths in the sample lakes either once, or multiple times during the spring, summer and fall months (May to September). |
| Abstract | |
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| Jennie McLaren, 2021 Relative percent cover and leaf nutrients was measured for plant species on Arctic LTER experimental plots in moist acidic and non-acid tundra, Arctic LTER Toolik Field Station, Alaska 2015. 10.6073/pasta/1c57b6613111c9d05c0225de12fd1098 |
Relative percent cover was measured for plant species on Arctic LTER experimental plots at Toolik field station in moist acidic and non-acidic tundra in greenhouse and control plots. Leaf percent carbon, percent nitrogen and percent phosphorus were collected from dominant species in greenhouse and control plots on Arctic LTER experimental plots at Toolik field station in moist acidic, non-acidic tundra, wet sedge and shrub tundra |
| Abstract | |
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| Gaius Shaver, 2012 Vegetation indices calculated from canopy reflectance spectra at four sites along Imnavait Creek, AK during the 2008-2010 growing seasons.. 10.6073/pasta/bfa61daf6eeb155376a029cef3f79d84 |
A spectrophotometer was used to scan the canopy vegetation at four sites along Imnavait Creek in the Kuparuk Watershed near Toolik Lake LTER, Alaska. The resulting reflectance spectra were used to calculate average vegetation indices for each site and collection day. |
| Abstract | |
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| William "Breck" Bowden, 2014 ARCSS/TK water chemistry and epilithon characterization from the Noatak National Preserve, Kelly River region (2010) and Feniak Lake region (2011).. 10.6073/pasta/39ed7afdfd1ad36019bd3b02c64d1bd1 |
These data are from two remote field campaigns in the Noatak National Preserve. Various thermokarst features and their receiving streams were sampled and characterized. A suite of water chemistry (nutrients, major anions and cations, total suspended sediment) and benthic variables (particulate carbon, nitrogen and phosphorus, and chlorophyll-a) were measured at 6 major sites (2 in 2010 and 4 in 2011). There were additional sites sampled for water chemistry above and below thermokarst features in 2011. |
| William "Breck" Bowden, 2014 ARCSS/TK water chemistry and total suspended sediment data from I-Minus2 and Toolik River thermokarsts and receiving streams, near Toolik Field Station, Alaska, summers 2006-2013.. 10.6073/pasta/36446317e7682f1b03c0f7def5b16fcc |
Water samples were taken at 5 locations at both I-Minus2 and Toolik River thermokarst sites (10 sampling locations total). A combination of ISCO and manual grab samples were taken depending on the sampling location and year. |
| William "Breck" Bowden, 2014 ARCSSTK benthic nutrients and chloropyll-a. 10.6073/pasta/5905edbd9bca76c1b25542d9a661d1a2 |
The (ARCSSTK) did extensive research during 2009-2011 field seasons in Arctic Alaska. Specifically, the ARCSSTK goal Streams goal was to quantify the relative influences of thermokarst inputs on the biogeochemical structure and function of receiving streams. Throughout the project, samples were collected from Benthic Rock Scrubs and measured for cholorophyll-a and particulate carbon (C), nitrogen (N) and phosphorus (P). |
| Abstract | |
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| George Kling, Christopher Luecke, 2007 Concentration of dissolved inorganic carbon (DIC), carbon and nitrogen concentrations, C:N ratios and del 13C isotope value for lakes and rivers on North Slope from Brooks Range to Prudhoe Bay, Arctic LTER 1988 to 2005. 10.6073/pasta/6341694e9d7155735d17da7001014e18 |
Composite file describing plant, animal, water, and sediment samples collected at various sites near Toolik Research Station (68 38'N, 149 36'W). Sample site descriptors include an assigned number specific to the file, a number that relates the samples to other samples collected on the same date and time (sortchem), site, date, time, and depth. Samples are identified by type, category, and a short description. Data include isotope values, carbon and nitrogen concentrations, and C:N ratios of samples. |
| Abstract | |
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| Anne Giblin, George Kling, 2022 Physical and chemical data for various lakes near Toolik Research Station, Arctic LTER. Summer 1975 to 1989.. 10.6073/pasta/588e78d0d92ee947349eda23402543f6 |
Decadal file describing the physical lake parameters recorded at various lakes near Toolik Research Station during summers from 1975 to 1989. Depth profiles at the sites of physical measures were collected in situ. Values measured included temperature, conductivity, pH, dissolved oxygen, Chlorophyll A, Secchi disk depth and PAR. Note that some sample depths also have additional parameters measured and available in separate files for water chemistry and primary production. |
| Anne Giblin, Christopher Luecke, George Kling, 2010 Average Epilimnetic Conductivity from 1992 to present in Tooli Lake, Arctic LTER, Alaska.. 10.6073/pasta/f0b996fef22d56cacd87f60f5dea2cd9 |
Average conductivity of the epilimnion (0-3m of water depth) found in Toolik Lake during the month of July. |
| Anne Giblin, George Kling, 2001 Physical and chemical data for various lakes near Toolik Research Station, Arctic LTER. Summer 2000 to 2009. 10.6073/pasta/791e3cb6288f75f602f23ef3e5532017 |
Decadal file describing the physical/chemical values recorded at various lakes near Toolik Research Station during summers from 2000 to 2009. Sample site descriptors include site, date, time, depth. Depth profiles of physical measures collected in situ with Hydrolab Datasonde in the field include temperature, conductivity, pH, dissolved oxygen in both percent saturation and mg/l, SCUFA chlorophyll-a values in both volts and µg/l, and PAR. |
| Anne Giblin, George Kling, 1991 Physical and chemical data for various lakes near Toolik Research Station, Arctic LTER. Summer 1990 to 1999. 10.6073/pasta/1fd85582de93a281e5e5d3b80df97b52 |
Decadal file describing the physical/chemical values recorded at various lakes near Toolik Research Station during summers from 1990 to 1999. Sample site descriptors include site, date, time, depth. Depth profiles of physical measures collected in situ with Hydrolab Datasonde in the field include temperature, conductivity, pH, dissolved oxygen in both percent saturation and mg/l, SCUFA chlorophyll-a values in both volts and µg/l, and PAR. |
| Anne Giblin, George Kling, 2021 Physical and chemical data for various lakes near Toolik Research Station, Arctic LTER. Summer 2010 to 2021. 10.6073/pasta/76ae1339a928d85193eb15bbe88cee75 |
Decadal file describing the physical/chemical values recorded at various lakes near Toolik Research Station. Sample site descriptors include site, date, time, depth. Depth profiles of physical measures collected in situ with Hydrolab Datasonde in the field include temperature, conductivity, pH, dissolved oxygen in both percent saturation and mg/l, SCUFA chlorophyll-a values in both volts and µg/l, and PAR. |
| Cody Johnson, George Kling, Anne Giblin, 2011 Sedimentation rate, concentration of macronutrients and flux for NE14, Toolik, Dimple, Perched during Summer 2009.. 10.6073/pasta/e2db8161be27bdbdcd398b0290f63f39 |
We measured the flux of bulk material and major macronutrients (carbon, nitrogen and phosphorus) from the water column to the benthos in four separate lakes during the summer of 2009. The lakes were chosen to investigate the impacts of disturbance on lake sedimentation. Two of the lakes, Dimple and Perched, were within catchments that were burned by the 2007 Anaktuvuk River wildfire. Two of the lakes, NE-14 and Perched, were receiving elevated sediment loads from thermokarst failures on their shorelines, and Toolik Lake was used as a reference lake. |
| Abstract | |
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| Gaius Shaver, Laura Gough, 2022 Vegetation indices calculated from reflectance spectra collected at LTER plots at Toolik Lake, Alaska during the 2007-2019 growing seasons.. 10.6073/pasta/c7f5923cc5b929ccdf0d61f461147b3d |
Vegetation indices calculated from reflectance spectra collected at Arctic LTER experimental plots at Toolik Lake, Alaska during the 2007-2019 growing seasons. |
| Abstract | |
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| Gaius Shaver, 2006 Bulk precipitation collected during summer months on a per rain event basis at Toolik Field Station, North Slope of Alaska, Arctic LTER 1988 to 2007.. 10.6073/pasta/410d11b9f95caf846e5fb6959145a4de |
Bulk precipitation was collected during summer months (June, July and August) on a per rain event basis at the University of Alaska Fairbanks Toolik Field Station, North Slope of Alaska (68 degrees 37' 42"N, 149 degrees 35' 46"W). Analysis of pH, NH4-N and phosphorus were performed at the field station. NO3-N were frozen and analyzed in Woods Hole, MA |
| Gaius Shaver, 2006 Precipitation cations and anions for June, July and August from a wet/dry precipitation, University of Alaska Fairbanks Toolik Field Station, North Slope of Alaska (68 degrees 37' 42"N, 149 degrees 35' 46"W), Arctic LTER 1989 to 2003. 10.6073/pasta/d59fb55e6934f4f90bd652399a2e76f8 |
Precipitation, collected from a wet/dry precipitation collector located near University of Alaska Fairbanks Toolik Field Station, North Slope of Alaska (68 degrees 37' 42"N, 149 degrees 35' 46"W) was sent out for standardized EPA rain water analysis. Nutrient chemistry was also run on a sub sample at the field station. |
| Gaius Shaver, 2004 Inorganic Nitrogen and phosphorus were analyzed on snow samples taken from two snow pits near the long-term acrtic LTER mesic acidic tussock experimental plots Toolik Field Station 2003. 10.6073/pasta/dd5fc68975ac6158633ccf11c91aa1c7 |
Inorganic Nitrogen and phosphorus were analyzed on snow samples taken from two snow pits near the long-term acrtic LTER mesic acidic tussock experimental plots. The snow layers in each pit were described and sampled separtely with the help of Matthrew Sturm. |
| Abstract | |
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| Gaius Shaver, Yuriko Yano, 2009 water chemistry of Imnavait watershed during 2002-2004. 10.6073/pasta/6a2e2065b9039335ac7a2b229204ecd6 |
Water chemistry (NO3, NH4, TDN, DON, DOC) from Imnavait watershed along hillslope. Sample waters were either collected by lysimeters, needle with syringe, or extracting soil with water or 1N KCl. |
| Gaius Shaver, Yuriko Yano, 2006 NO3 and NH4 collected by resin bags in 15N addition plots during 2003-2004. 10.6073/pasta/c98aee0d4a8c4023107c26588e6227d5 |
Concentrations of NO3 and NH4 and d15N of NO3 and NH4 collected on resin bags from 15N addition plots along hillslope in Imnavait watershed. |
| Laura Gough, Sarah Hobbie, 2005 Percent carbon and percent nitrogen of above ground plant and belowground stem biomass samples from experimental plots in moist acidic and moist non-acidic tundra, 2001, Arctic LTER, Toolik Lake, Alaska.. 10.6073/pasta/75de62f9de5e22e63a76c8b48b99cf2b |
Percent carbon and percent nitrogen were measured from above ground plant and belowground stem biomass samples from experimental plots in moist acidic and moist non-acidic tundra. Biomass data are in 2001lgshttbm.dat. |
| Abstract | |
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| Donald Schell, 1993 Arctic LTER 1991: Percent moisture, bulk density, percent loss on ignition and percent organic carbon were measured for peat collected from soils in the Imnavait Creek watershed.. 10.6073/pasta/027e46f118de965c56f556b76518c06f |
Percent moisture, bulk density, percent loss on ignition and percent organic carbon were measured for peat collected from soils in the Imnavait Creek watershed. |
| Sarah Hobbie, 2000 Total soil cations (Al, Ca, K, Mg, Na, P) for intertussock O and B horizon soils on moist acidic and non-acidic tundra, Arctic LTER 1997.. 10.6073/pasta/15beb235b15c465291bbff83e1fce5c3 |
Total soil cations (Al, Ca, K, Mg, Na, P) for intertussock O and B horizon soils on moist acidic and non-acidic tundra. |
| Sarah Hobbie, 2000 Extractable soil cations (K, Ca, Mg, Na) for intertussock O and B horizon soils on moist acidic and non-acidic tundra, Arctic LTER 1997.. 10.6073/pasta/f9f9b49cb92a94f687328ed1a7ca76cb |
Extractable soil cations (K, Ca, Mg, Na) for intertussock O and B horizon soils on moist acidic and non-acidic tundra. |
| Jennie DeMarco, Michelle Mack, 2009 Net nitrogen mineralization from shrub gradient and snow manipulations, near Toolik field station, collect in the summer of 2006 and winter of 2006-2007. 10.6073/pasta/d63fe4fe5d2725aaa8732f1ae6548028 |
In arctic tundra, near Toolik Lake, Alaska, we quantified net N-mineralization rates under ambient and manipulated snow treatments at three different plant communities that varied in abundance and height of deciduous shrubs. |
| Laura Gough, 2000 Plant available NH4, NO3, and PO4 was determined at three site (LTER Toolik acidic and nonacidic tundra and Sagwon acidic tundra) and three community combinations (tussock, watertrack, and snowbed) Arctic LTER 1997.. 10.6073/pasta/b5f5ca168b82ffc3db6522a489a90c7f |
Plant available NH4, NO3, and PO4 was determined at three site (LTER Toolik acidic tundra, LTER Toolik nonacidic tundra, and Sagwon acidic tundra) and three community combinations (tussock, watertrack, and snowbed), three times during the season. pH was also determined in July and strong acid phosphorous in August. |
| Gaius Shaver, 1993 Extractable NH4-N and NO3-N (2 N KCl), PO4-P (0.025 N HCl) and pH (0.01 M CaCl2) were measured on soils from a transect along the Dalton road, Arctic LTER 1991.. 10.6073/pasta/d2fc50cac67c6ae3659500e1baa2d3a9 |
Extractable NH4-N and NO3-N (2 N KCl), PO4-P (0.025 N HCl) and pH (0.01 M CaCl2) were measured on soils from a transect along the Dalton road. Sites are Gus Shaver flowering sites and Arctic LTER sites. |
| Gaius Shaver, 2005 Plant available NH4, NO3, and PO4 was determined at sites near ARC LTER Toolik acidic tundra and at a toposequence along the floodplain of the Sagavanirktuk River using 2 N KCL and weak HCL extracts, Arctic LTER 1987 to 2002. 10.6073/pasta/48fd52a09bf83e6c6bcecb49b48e9358 |
Plant available NH4, NO3, and PO4 was determined at sites near ARC LTER Toolik acidic tundra and at a toposequence along the floodplain of the Sagavanirktuk River using 2 N KCL and weak HCL extracts. This file complies data collected at different times from 1987 through 2001 and includes initial extracts taken for buried bag method of net nitrogen mineralization. |
| Gaius Shaver, Yuriko Yano, 2009 Chloroform-extractableN and d15N within 15N addition plots for Aug 2003. 10.6073/pasta/3afcfb4b01223d351944947a7881a2d6 |
Pool size and d15N values for chloroform-extractable N, extractable-N, and non-extractable N pools. Samples collected in Aug. 2003 from 1st Organic Layer of 15N addition plots in Imnavait watershed. 1st Organic Layer = the upper 10 cm of organic soil or, if the organic layer was < 10 cm thick, the entire layer (e.g., there was never > 4 cm of organic soil at Crest). |
| Gaius Shaver, Yuriko Yano, 2009 Pool size and 15N atom % of nydrolyzable N in natural and enriched soils in Imnavait watershed. 10.6073/pasta/ed169ed557beac4c5b7ba410439d8595 |
Hydrolyzable N pool size and 15N atom % of natural and enriched soils collected from Imnavait watershed in summer of 2005. |
| Gaius Shaver, Yuriko Yano, 2009 physical and chemical information for soil cores from Imnavait watershed during 2003-2005. 10.6073/pasta/55038942444330ec87fbf0eaac4a2a75 |
Physical (bulk density, soil thickness) and chemical (total C and N, d13C and d15N) information of soil cores taken from 15N addition plots in Imnavait watershed. |
| Knute Nadelhoffer, Anne Giblin, 1995 Carbon, nitrogen and phosphorus content in the seasonally thawed soils are described for four arctic tundra vegetation types located near the Toolik Field Station, Arctic LTER 1993.. 10.6073/pasta/84ab340d21f16f18976b850d92923a50 |
Carbon, nitrogen and phosphorus content in thawed soils are described for four arctic tundra vegetation types located near the Toolik Field Station. |
| Gaius Shaver, 2006 Nitrogen mineralization was determined on Arctic LTERToolik and Sag River tussock tundra using the buried bag method, Toolik Field Station, Alaska, Arctic LTER 1989-2013.. 10.6073/pasta/79e01a508bb9021e265eec2a8201b2f9 |
Nitrogen mineralization was determined on LTER and Sag River tussock tundra using the buried bag method. Yearly bags have been deployed every August since 1990. |
| Jennie McLaren, 2018 Multiple biogeochemical variables were measured for organic and mineral soils on Arctic LTER experimental plots in moist acidic and non-acidic tundra, Arctic LTER Toolik Field Station, Alaska 2013.. 10.6073/pasta/2302b3a5eab56970aa4e4f71d36b7fce |
Measures of soil nutrient content (available N and P, Extractable N and P, Total C, N and P), and microbial biomass and activity (exoenzyme activity) were measured for organic and mineral soils on Arctic LTER experimental plots at Toolik field station in moist acidic and non-acidic tundra (organic soils only). |
| Jennie McLaren, 2019 Soil biogeochemical variables collected on the Arctic Long Term Ecological Research (ARC LTER) experimental plots in moist acidic and dry heath tundra, Arctic LTER Toolik Field Station, Alaska 2017. 10.6073/pasta/5a5cbb785bde48522bde7b87c65d3c13 |
Soil nutrients ( |
| Jennie McLaren, 2021 Soil biogeochemical variables collected on the Arctic LTER experimental plots in moist acidic, moist non-acidic, wet shrub and shrub tundra, Arctic LTER Toolik Field Station, Alaska 2015. 10.6073/pasta/d4f567844673857239eec0cb61c6f543 |
We investigated the effect of long-term warming on multiple soil and microbial carbon, nitrogen, and phosphorus pools, and microbial extracellular enzyme activities, with a particular focus on phosphorus, in Alaskan tundra plots underlain by permafrost |
| Abstract | |
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| Gaius Shaver, 2012 Vegetation indices calculated for ITEX harvest plots in 2004-2009 at Toolik, Alaska; Abisko, Sweden; Svalbard, Norway; Zackenberg, Northeast Greenland; and Barrow, Alaska. 10.6073/pasta/273dc3a7f43fb71e90d786fcd69c6c96 |
A spectrophotometer was used to scan the canopy vegetation of ITEX harvest plots. The resulting reflectance spectra were used to calculate several vegetation indices of interest (NDVI, EVI, EVI2, PRI, WBI, Chlorophyll Index). Average values of these vegetation indices for each ITEX harvest plot are presented here. These plots also had biomass harvests performed and were analyzed for leaf area and nitrogen content (see 2003-2009gsharvest.csv, 2003-2009gsharvestLAI-N.csv). |
| Gaius Shaver, 2007 Percent C, Percent N and C:N ratio for leaf samples from ITEX flux survey plots for 2003-2004, Toolik Alaska.. 10.6073/pasta/92831adcff93794392ee20a4a32d5570 |
Foliar carbon and nitrogen concentrations of the dominant species from within the ITEX flux survey plots 2003-2004. Plots were located in the Toolik Lake LTER moist acidic tussock experiment plots in Alaska; at Imnavait Creek, Alaska. |
| Gaius Shaver, 2010 Leaf area, biomass, carbon and nitrogen content by species for harvests taken as part of the ITEX flux survey.. 10.6073/pasta/74407ca602bf8944e5152f7a74203ac4 |
Leaf area, biomass, foliar carbon and nitrogen by species for destructive vegetation harvests. 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; and at various sites in Adventdalen, Svalbard, in Zackenberg valley, Northeast Greenland, and at BEO near Barrow, Alaska. Harvests were taken during the growing seasons 2003 to 2009. |
| Gaius Shaver, 2010 NDVI, leaf area index and total foliar N of harvests taken during the ITEX flux survey. 10.6073/pasta/95095cb096b2e977e6bb8658b021c76e |
Leaf area, biomass, foliar carbon and nitrogen by species for destructive vegetation harvests. 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; and at various sites in Adventdalen, Svalbard, in Zackenberg valley, Northeast Greenland and at BEO near Barrow, Alaska. Harvests were taken during the growing seasons 2003 to 2009. |
| Gaius Shaver, 2013 Percent carbon and nitrogen of leaves from shoots harvested at three levels in the canopy from 19 plots dominated by S. pulchra and B. nana shrubs near LTER Shrub plots at Toolik Field Station, AK the summer of 2012.. 10.6073/pasta/6e98f40b0cd7e611f62494b68a938244 |
The percent carbon and nitrogen from leaves of shoots harvested from 1m x 1m point frame plots the summer of 2012 at Toolik Lake, Alaska. were measured on a ThermoScientific 2000. For each point frame plot, six shoots were harvested from upper, middle, and low sections of the canopy. The photosynthetic capacity of each shoot was analyzed with a LiCor 6400 infra-red gas analyzer by being run through a light response and A/Ci curve. |
| Gaius Shaver, 2011 Vegetation indices calculated for ITEX flux plots in 2004-2009 at Toolik, Alaska; Abisko, Sweden; Svalbard, Norway; Zackenberg, Northeast Greenland; and Barrow, Alaska. 10.6073/pasta/b11455d590fcb9eed893b86425590f15 |
A spectrophotometer was used to scan the canopy vegetation of ITEX flux plots. The resulting reflectance spectra were used to calculate several vegetation indices of interest (NDVI, EVI, EVI2, PRI, WBI, Chlorophyll Index). Average values of these vegetation indices for each ITEX flux plot are presented here. |
| Abstract | |
|---|---|
| Gaius Shaver, James A Laundre, 2021 Soil temperatures and moisture for Arctic Long Term Experimental Research (ARC LTER) heath experimental plots, Toolik Field Station, North Slope Alaska for 2001-2018. . 10.6073/pasta/5bec91673a0bd177777381b490247241 |
Soil temperatures at 2 depths, 5 and 10 cm, canopy temperatures and soil moisture at 10 cm were measured in a heath tundra Arctic Long Term Experimental Research (ARC-LTER) site at Toolik Lake Field Station, North slope, Alaska. Air temperature and relative humidity and global radiation were also measured but are presented in another dataset. Only control and nutrient addition (nitrogen plus phosphorus ) treatments plots were measured . |
