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Circumpolar Arctic Substrate pH

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 associated with calcareous bedrock (pH > 7.2). The latter often have unique assemblages of endemic plant species. There are no common base maps that show this essential difference in substrate chemistry, so the CAVM substrate map was derived from a wide variety of available sources including soil, surficial geology, and bedrock geology maps, and from spectral patterns that could be recognized on the AVHRR base image. The pH values of the three categories were based on the field experience and hundreds of Arctic vegetation relevé plots sampled by D.A. Walker on the North Slope and Seward Peninsula of Alaska, in consultation with F.J.A. Daniëls (Greenland) and N.G. Moskalenko (Yamal and Gydan Peninsulas, Russia).

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Data and Resources

  • Download
    Download :: Map Image

    aga_circumpolar_substrate_ph_2003.jpg (224 KB)

  • Download
    Download :: GIS Data

    aga_circumpolar_substrate_ph_2003_shp.zip (2.07 MB)

  • View website
    Website :: Toolik Arctic Geobotanical Atlas

    http://www.arcticatlas.org/maps/themes/cp/cpsc

Status: Complete
Type: Data
Data Types: Image, GIS
Primary Contact
Raynolds, Martha
ISO Topics
biota, geoscientificInformation

Geo-keywords
Alaska, Arctic

Collection
All Maps, Circumpolar Arctic Vegetation Map

Direct Record Link
http://agc.portal.gina.alaska.edu/catalogs/9601-circumpolar-arctic-substrate-ph
  • 07969bba1ee875e70c44c0423525d17f
    Updated by Jana
    2015-10-12 16:25:32 -0800
  • 01c8ceef3d596f40f05bf496ca00d929
    Updated by Lisa
    2015-04-13 15:26:33 -0800
  • 01c8ceef3d596f40f05bf496ca00d929
    Updated by Lisa
    2015-03-25 11:11:08 -0800
  • 01c8ceef3d596f40f05bf496ca00d929
    Updated by Lisa
    2014-10-28 09:22:42 -0800
  • 01c8ceef3d596f40f05bf496ca00d929
    Updated by Lisa
    2014-10-22 10:50:15 -0800
  • 01c8ceef3d596f40f05bf496ca00d929
    Updated by Lisa
    2014-08-25 10:52:06 -0800
  • 01c8ceef3d596f40f05bf496ca00d929
    Published by Lisa
    2014-08-25 09:09:23 -0800
  • 01c8ceef3d596f40f05bf496ca00d929
    New record created
    2014-08-25 08:50:52 -0800
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