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Table 4. Percent frequency, abundance index (AI), cover, and standard errors of submersed and rooted floating–leaf vegetation in Pool 11, Upper Mississippi River System, 2001.
| Common
name (Scientific name) |
Contiguous backwater n =129 |
Isolated backwater n = 15 |
Impounded n = 204 |
|||
|
Freq
|
AI
|
Freq
|
AI
|
Freq
|
AI
|
|
| chara (Chara spp.) |
-
|
-
|
13.3± 9.1
|
1.2 ± 0.8
|
-
|
-
|
| coontail (Ceratophyllum demersum) |
20.2 ± 3.5
|
2.4 ± 0.5
|
73.3 ± 11.8
|
19.7 ± 6.2
|
3.9 ± 1.4
|
0.5 ± 0.2
|
| pondweed, curly (Potamogeton crispus) |
0.8 ± 0.8
|
0.1 ± 0.1
|
-
|
-
|
1.5± 0.8
|
0.1 ± 0.1
|
| pondweed, flatstem (P. zosteriformis) |
0.8 ± 0.8
|
0.1 ± 0.1
|
6.7± 6.7
|
1.1 ± 1.1
|
1.0± 0.7
|
0.1 ± 0.1
|
| pondweed, leafy/small (P. foliosus/pusillus) |
2.3 ±1.3 |
0.2 ± 0.1
|
20.0 ± 10.7
|
2.2 ± 1.3
|
-
|
-
|
| pondweed, longleaf (P. nodosus) |
1.6 ± 1.1
|
0.2 ± 0.2
|
6.7 ± 6.7
|
1.1 ± 1.1
|
0.5 ± 0.5
|
0.1 ± 0.1
|
| pondweed, sago (P. pectinatus) |
10.1 ± 2.7
|
1.1 ± 0.3
|
46.7 ± 13.3
|
6.0 ± 2.1
|
9.8 ± 2.1
|
1.4 ± 0.3
|
| stargrass, water (Heteranthera dubia) |
-
|
-
|
-
|
-
|
-
|
-
|
| watermilfoil, Eurasian (Myriophyllum spicatum) |
1.6 ± 1.1
|
0.2 ± 0.1
|
6.7± 6.7
|
1.1 ± 1.1
|
1.5 ± 0.8
|
0.1 ± 0.1
|
| waternymph, nodding (Najas flexilis) |
-
|
-
|
13.3 ± 9.1
|
2.4 ± 1.8
|
-
|
-
|
| waternymph, southern (N. guadalupensis) |
3.9 ± 1.7
|
0.5 ± 0.2
|
20.0 ± 10.7
|
2.8 ± 1.5
|
-
|
-
|
| waterweed, Canadian (Elodea canadensis) |
-
|
-
|
20.0 ± 10.7
|
2.3 ± 1.5
|
0.5 ± 0.5
|
<0.1 ± <0.1
|
| wildcelery (Vallisneria americana) |
0.8 ± 0.8
|
0.1 ± 0.1
|
-
|
-
|
2.0 ± 1.0
|
0.2 ± 0.1
|
| all submersed species |
26.4 ±3.9
|
3.5 ± 0.6
|
73.3 ± 11.8
|
21.8 ± 6.1
|
11.8 ± 2.3
|
1.9 ± 0.4
|
|
Freq
|
Cover
|
Freq
|
Cover
|
Freq
|
Cover
|
|
| lotus, American (Nelumbo lutea) |
16.3 ± 3.3
|
3.0 ± 0.9
|
26.7 ± 11.8
|
6.7 ± 4.6
|
3.4 ± 1.3
|
0.5 ± 0.2
|
| pond-lily, yellow (Nuphar variegata) |
0.8 ± 0.8
|
0.1 ± 0.1
|
-
|
-
|
-
|
-
|
| waterlily, white (Nymphaea odorata) |
13.2 ± 3.0
|
4.0 ± 1.1
|
33.3 ± 12.6
|
7.3 ± 3.7
|
0.5 ± 0.5
|
0.1 ± 0.1 |
| all rooted floating–leaf species |
20.9 ± 3.6
|
8.4 ± 1.7
|
46.7 ± 13.3
|
14.0 ± 5.9
|
3.4 ± 1.3
|
0.7 ± 0.3
|
| Common
name (Scientific name) |
Main channel border n =139 |
Secondary channel n =77 |
Pool 11 n = 564 |
|||
|
Freq
|
AI
|
Freq
|
AI
|
Freq
|
AI
|
|
| chara (Chara spp.) |
-
|
-
|
-
|
-
|
0.3 ± 0.2
|
<0.1 ± <0.1
|
| coontail (Ceratophyllum demersum) |
1.4 ± 1.0
|
0.2 ± 0.1
|
7.8 ± 3.1
|
1.0 ± 0.4
|
9.1 ± 1.1
|
1.4 ± 0.2
|
| pondweed, curly (Potamogeton crispus) |
-
|
-
|
1.3 ± 1.3
|
0.1 ± 0.1
|
0.8 ± 0.3
|
0.1 ± <0.1
|
| pondweed, flatstem (P. zosteriformis) |
-
|
-
|
-
|
-
|
0.7 ± 0.3
|
0.1 ± <0.1
|
| pondweed, leafy/small (P. foliosus/pusillus) |
-
|
-
|
-
|
-
|
1.1 ± 0.4
|
0.1 ± <0.1
|
| pondweed, longleaf (P. nodosus) |
-
|
-
|
1.3 ± 1.3
|
0.1 ± 0.1
|
0.8 ± 0.4
|
0.1 ± 0.1
|
| pondweed, sago (P. pectinatus) |
7.9 ± 2.3 |
1.0 ± 0.3
|
-
|
-
|
9.3 ± 1.2
|
1.2 ± 0.2
|
| stargrass, water (Heteranthera dubia) |
2.2 ± 1.2
|
0.1 ± 0.1
|
-
|
-
|
0.7 ± 0.4
|
<0.1 ± <0.1
|
| watermilfoil, Eurasian (Myriophyllum spicatum) |
2.9 ± 1.4
|
0.3 ± 0.1
|
3.9 ± 2.2
|
0.3 ± 0.2
|
2.3 ± 0.7
|
0.2 ± 0.1
|
| waternymph, nodding (Najas flexilis) |
-
|
-
|
-
|
-
|
0.3 ± 0.2
|
0.1 ± <0.1
|
| waternymph, southern (N. guadalupensis) |
-
|
-
|
-
|
-
|
1.4 ± 0.5
|
0.2 ± 0.1
|
| waterweed, Canadian (Elodea canadensis) |
0.7 ± 0.7
|
0.1 ± 0.1
|
-
|
-
|
0.9 ± 0.4
|
0.1 ± 0.1
|
| wildcelery (Vallisneria americana) |
3.6 ± 1.6
|
0.5 ± 0.2
|
1.3 ± 1.3
|
0.1 ± 0.1
|
2.1 ± 0.6
|
0.2 ± 0.1
|
| all submersed species |
10.8 ± 2.6
|
1.3 ± 0.4
|
9.1 ± 3.3
|
1.2 ± 0.5
|
16.3 ± 1.5
|
2.5 ± 0.3
|
|
Freq
|
Cover
|
Freq
|
Cover
|
Freq
|
Cover
|
|
| lotus, American (Nelumbo lutea) |
-
|
-
|
1.3 ± 1.3
|
0.1 ± 0.1
|
5.8 ± 0.9
|
1.1 ± 0.3
|
| pond-lily, yellow (Nuphar variegata) |
-
|
-
|
-
|
-
|
0.2 ± 0.2
|
<0.1 ± <0.1
|
| waterlily, white (Nymphaea odorata) |
-
|
-
|
2.6 ± 1.8
|
1.3 ± 1.0
|
4.4 ± 0.8
|
1.3 ± 0.3
|
| all rooted floating–leaf species |
-
|
-
|
2.6 ± 1.8
|
1.3 ± 1.0
|
7.5 ± 1.0
|
2.7 ± 0.5
|
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.umesc.usgs.gov/reports_publications/ltrmp/veg/2001/tables/tables04pool11.html
Page Contact Information: Contacting the Upper Midwest Environmental Sciences Center
Page Last Modified:
October 2, 2007
