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Vegetation - Stratified Random Sampling 2001

2001 Results in Pool 26 of the Upper Mississippi River

Sampling Efforts

We sampled Pool 26 of the Upper Mississippi River System (UMRS) and lower Illinois River from June 15 to August 15, 2001.  Two of the 415 total sites were not sampled because of inaccessibility (Figure 9).

Submersed Aquatic Vegetation

Six species of submersed aquatic vegetation (SAV) were sampled during the 2001 stratified random sampling episode from isolated backwaters of the lower Illinois River (Table 6; Figure 10).  Of the six species, coontail was the most common plant encountered followed by sago and longleaf pondweeds.  The SAV was found in 11% of the isolated backwater sites.

Rooted Floating-Leaf Vegetation

Rooted floating-leaf vegetation was sampled from contiguous backwaters (3% frequency) and isolated backwaters of Pool 26 (UMRS; 2% frequency) and the lower Illinois River (11% frequency).  Two species were recorded, American lotus and floating primrose-willow.

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Page Last Modified: April 17, 2018