Northern Prairie Wildlife Research Center
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| Plate 19. Central portion of a large semipermanent pond, moderately brackish, cover type 2 (IV-C-2), duringn severe drought conditions. Deep-marsh zone represented by drawdown bare-soil phase, interspersed with clumps of emergent vegetation composed of hardstem bulrush (Scirpus acutus). August 4, 1961, Stutsman County, N. Dak. |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/wetlands/pondlake/plate19.htm
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Menlo Park, CA [caww54]
