Measurements of belowground standing crops of arctic tundra vegetation near Barrow, Alaska, were made by depth increment and plant category to determine patterns of spatial and seasonal variation. In 1965 in a vegetationally heterogeneous area, total subsurface standing crops (live plus dead) varied horizontally from 1520 to 2185 g m-2. The estimated living portion varied from 735 to 1435 g m-2. Between 69 and 91% of the living material was concentrated in the top 10 cm of soil. Both horizontal and vertical distribution of the subsurface standing crop appeared to be related to variation in soil moisture, postulated soil aeration, and depth of thaw.
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John G. Dennis (1977) studied this question.
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