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32 results found Displaying entries 1 - 20 of 32 in total

Circumpolar Arctic Substrate pH

Aga circumpolar substrate ph 2003 Alaska Geobotany Center (AGC) - Differences in substrate chemistry have important effects on dominant plant communities. Some of the most important effects are related to soil pH, which governs the availability of essential plant nutrients. Soils in the circumneutral range (pH 5.5-7.2) are generally mineral rich, whereas the full suite of essential nutrients are often unavailable in acidic soils (pH < 5.5) or in soils...
Complete
2019-08-19 14:04:17 -0800
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Alaska Arctic Floristic Provinces Map

Aga arctic ak floristic 2005 Alaska Geobotany Center (AGC) - The Arctic has a relatively consistent core ofplant species that occur throughout the circumpolar region, but there is also considerable east to west variation in regional floras, particularly in the southern bioclimate subzones. These differences are due to factors such as different histories related to glaciations, land bridges, and north-south trending mountain ranges that have influenced...
Complete
2019-08-19 13:57:32 -0800
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Patterned-Ground 10 x 10 m Grids (Raynolds et al. 2005)

Alaska Geobotany Center (AGC) - This mapping includes six locations along the Dalton Highway and in the Prudhoe Bay Oilfield area, forming a north-south transect across the climate gradient on the North Slope of Alaska. From south to north, the locations are Happy Valley, Sagwon, Franklin Bluffs, Deadhorse, West Dock, and Howe Island. At each location, 10 x 10 m grids were mapped to characterize the heterogeneity of...
Complete
2019-08-20 13:59:19 -0800
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AVA-AK: Flux Towers-Zona (Barrow, Atqasuk, Ivotuk) (Davidson et al. 2016a, Davidson et al. 2016b)

Sitephoto composite fluxtwrzona Alaska Geobotany Center (AGC) - Arctic Vegetation Archive - Alaska: Flux Towers-Zona: Vegetation plots within the Flux Towers-Zona project eddy covariance tower footprints at Barrow: (three towers) including the Barrow Environmental Observatory Flux Tower (BEO), Barrow Biocomplexity Experiment South Tower (BES), and Climate Monitoring and Diagnostics Laboratory Flux Tower (CMDL), at Atqasuk: the Atqasuk Flux Tower (ATQ),...
Complete
2014-07-18
2014-08-31
2019-09-30 13:31:53 -0800
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AVA-AK: Atqasuk Vegetation Plots (Komárková & Webber 1980; Villarreal 2013)

Aava atqasuk 1980 sitephoto Alaska Geobotany Center (AGC), Systems Ecology Lab, University of Texas El Paso (SEL at UTEP) - Arctic Vegetation Archive - Alaska: Atqasuk. The Atqasuk vegetation plots were originally described and mapped by Drs. Vera Komárková and Patrick J. Webber in 1975 as part of the Research on Arctic Tundra Environments (RATE) project. These sites were resampled in 2000 and 2010 and assessed for community change as part of the 'IPY Back to the Future: Resampling old research sites to assess...
Complete
1975-07-01
2010-07-01
2019-09-27 16:38:00 -0800
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Circumpolar Arctic Floristic Provinces Map

Aga circumpolar floristic 2003 Alaska Geobotany Center (AGC) - Floristic sectors characterize the considerable east-west floristic variation within the subzones. The more northern Arctic bioclimate subzones have a relatively consistent core of Arctic plant species that occur around the circumpolar region. Further south, local east-west variation is related to a variety of factors, including different paleohistories and the greater climatic heterogeneity....
Complete
2019-08-16 12:53:02 -0800
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Howe Island Patterned-Ground 10 x 10 m Grids

Alaska Geobotany Center (AGC) - The Howe Island biocomplexity grid is located on a 1.5 x 0.5 km island off the delta of the Sagavanirktok River, west of the Endicott Causeway in the Prudhoe Bay oilfield, AK. There is one 10 x 10 m grid, with a complex of vegetation types created by 10 to 30-m polygonal cracking due to permafrost ice-wedges, smaller 1 to 3-m non-sorted circles, and small 10-20 cm surficial desiccation...
Complete
2019-08-16 14:01:36 -0800
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AVA-AK: Cape Thompson Vegetation Plots (Johnson et al. 1966)

Aava capethompson fromvierecketal image Alaska Geobotany Center (AGC) - Arctic Vegetation Archive - Alaska: Cape Thompson Vegetation Plots. The vegetation of the Cape Thompson region at Ogotoruk Creek was described by A. W. Johnson et al. during the U.S. Atomic Energy Commission’s Project Chariot Studies from 1959-1963 funded under Contract No. AT (04-3)-310. Cape Thompson is on the Chukchi Sea on the Lisburne Peninsula in the Arctic Foothills of the Brooks...
Complete
1959-01-01
1980-12-31
2019-09-27 16:51:34 -0800
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AVA-AK: Imnavait Creek Vegetation Plots (Walker et al. 1987a)

Aava imnavaitcreek dwalker 1987a a sitephoto metadata Alaska Geobotany Center (AGC) - Arctic Vegetation Archive - Alaska: Imnavait Creek Vegetation Plots. Vegetation in the vicinity of the Imnavait Creek field site located in the Upper Kuparuk watershed of the Brooks Range was described by D.A. Walker et al. as part of a study that was initiated in the summer of a Department of Energy R4D (Response, Resistance, Resilience and Recovery from Disturbance) project. Imnavait Creek...
Complete
1984-08-01
1985-09-04
2019-09-30 13:32:35 -0800
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Happy Valley Patterned-Ground 10 x 10 m Grids

Aga happy valley hillcrest vegetation 2006 Alaska Geobotany Center (AGC) - The Happy Valley patterned-ground grids are located in Subzone E, the warmest part of the Arctic, in the foothills of the Brooks Range, just west of the Sagavanirktok River and the Dalton Highway. There are three 10 x 10-m grids along a hill slope, one on the crest of the hill (dry), one on the mid-slope (mesic), and one on the toe slope (wet). All three have tussock-sedge, erect dwarf-shrub,...
Unknown
2019-08-16 13:57:14 -0800
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Geobotanical Atlas of the Prudhoe Bay Region (Walker et al. 1980)

Walker%20et%20al%201980%20geobotanical%20atlas%20300 Alaska Geobotany Center (AGC) - This map covers most of the Prudhoe Bay Oilfield on the North Slope of Alaska that was under development in 1980, covering 145 km^2. The map synthesizes work done for the US Army Corps of Engineers CRREL, the International Biome Program, and the UNESCO MAB Project 6. The mapping was based on aerial photographs taken in 1973 at a scale of 1:6000. The maps are thus a static representation of a...
Ongoing
2019-08-16 13:12:04 -0800
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AVA-AK: Arrigetch Peaks (Cooper 1983)

Aava arrigetchpeask dcooper 1983 sitephoto metadata Alaska Geobotany Center (AGC) - Arctic Vegetation Archive - Alaska: Arrigetch Peaks. The vegetation of Arrigetch Peaks was described and mapped by David J. Cooper for his PhD thesis funded by National Park Service. Located in the Endicott Mountains of the central Brooks Range, the vegetation of the Arrigetch Peaks is uniquely influenced by both latitude and altitude (Cooper 1986b). A reconnaissance of the area was...
Complete
1976-01-01
1983-12-31
2019-09-30 13:29:23 -0800
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Deadhorse Patterned-Ground 10 x 10 m Grids

Aga deadhorse vegetation 2006 Alaska Geobotany Center (AGC) - The Deadhorse patterned-ground grid is located near the industrial center of Deadhorse, AK, within 15 km of the Beaufort Sea coast. There is one 10 x 10 m grid, with a complex of vegetation types created by non-sorted circles, with sparser vegetation in the circles and more continuous vegetation between the circles. Back to: [Patterned-Ground 10 x 10 m...
Complete
2019-08-16 14:00:04 -0800
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AVA-AK: Frost Boil Vegetation Plots (Kade et al. 2005)

Aava frostboils akade 2005 locationmap anc Alaska Geobotany Center (AGC) - Arctic Vegetation Archive - Alaska: Frost Boil Vegetation Plots. The vegetation associated with cryoturbated frost-heave features on the North Slope, Alaska was described by Kade et al. (2005) as part of the "Biocomplexity associated with biogeochemical cycles in arctic frost-boil ecosystems" project (National Science Foundation grant OPP-0120736) from 2002 to 2006. The study sites spanned...
Complete
2000-08-16
2003-08-09
2019-09-27 17:01:28 -0800
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AVA-CA: High Arctic Canada, Isachsen, Ellef Ringnes Is. Vegetation Plots (Vonlanthen et al. 2008)

Aava hacisachsen cvonlanthen 2008 plotmap anc Alaska Geobotany Center (AGC) - Arctic Vegetation Archive-Canada: High Arctic Canada, Isachsen, Ellef Ringnes Island Vegetation Plots. The vegetation of 52 plots at Isachsen (the now closed High Arctic Weather Station) on Ellef Ringnes Island, Canada was studied as part of a multi-year project focused on patterned-ground plant communities. Patterned ground includes circles, polygons, nets, hummocks, and other features...
Complete
2005-07-22
2005-07-29
2019-09-27 17:14:43 -0800
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West Dock Patterned-Ground 10 x 10 m Grids

Alaska Geobotany Center (AGC) - The West Dock biocomplexity grid is located near the water pumping facility at West Dock in the Prudhoe Bay oilfield, AK, within 1 km of the Beaufort Sea coast. There is one 10 x 10 m grid with nontussock sedge, prostrate dwarf-shrub, moss tundra on sandy soils. Back to: [Patterned-Ground 10 x 10 m Grids](/catalog/entries/8516-patterned-ground-10-x-10-m-grids-raynolds-et-a) Go to...
Complete
2019-08-16 14:00:51 -0800
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AVA-AK: Tundra Fires (Breen 2015)

Breen tundra fire Alaska Geobotany Center (AGC) - Arctic Vegetation Archive - Alaska: Tundra Fires. The vegetation associated with tundra fire scars on the Seward Peninsula and northern foothills of the Brooks Range in Arctic Alaska was surveyed in the field during late June and July 2011 and 2012. This research was supported by USGS Alaska Science Center grants to Amy Breen and Teresa Hollingsworth (Seward Peninsula) and Benjamin Jones...
Ongoing
2011-06-23
2019-09-30 14:10:03 -0800
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Circumpolar Arctic Vegetation Map (CAVM Team 2003)

Aga circumpolar cavm 2003 side1 Alaska Geobotany Center (AGC) - The Circumpolar Arctic Vegetation Map (CAVM) is a geoecological map of the entire Arctic with a unified legend. It is the first vegetation map of an entire global biome at a comparable resolution. It was funded by the US National Science Foundation (OPP-9908-829), the US Fish & Wildlife Service, the US Geological Survey and the US Bureau of Land Management. The CAVM region is north of the...
Complete
2019-08-26 13:22:51 -0800
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Upper Kuparuk River Region Vegetation (Walker & Maier 2008)

Aga upper kuparuk vegetation walker 2008 Alaska Geobotany Center (AGC) - The vegetation of the Upper Kuparuk River Region was studied and mapped as part of the Arctic Long-Term Ecological Research (LTER) project at Toolik Lake and the Department of Energy R4D (Response, Resistance, Resilience and Recovery of vegetation from Disturbance). Project at Imnavait Creek (Walker et al. 1994, Walker and Walker 1996). Fifty-seven plant communities and land-cover types were...
Complete
2019-08-19 14:06:17 -0800
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Beechey Point Land Cover Classification: CRREL Report 87-5

Aga beecheypointquad landsat vegetation 1987 Alaska Geobotany Center (AGC) - This report presents a Landsat-derived land cover classification of the Beechey Point, Alaska, 1:250,000-scale quadrangle with descriptions of the major vegetation units. Eight Landsat-level units deri neds from multispectral scanner data, eleven photo-interpreted units, and eight common vegetation complexes are described and illustrated. Procedures of Landsat analysis, field methods, and...
Complete
1987-04-01
2019-08-19 12:47:31 -0800
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