Upper Midwest Environmental Sciences Center
Table 3. Percent frequency, abundance index (AI), cover, and standard errors of submersed and rooted floating-leaf vegetation in Pool 8, Upper Mississippi River System, 2000.
| Common name (Scientific name) |
Contiguous backwater n = 175 |
Isolated backwater n = 30 |
Impounded
n = 225 |
|||
| Freq |
AI |
Freq |
AI |
Freq |
AI |
|
| bladderwort, common (Utricularia macrorhiza) | 4.0 ± 1.5 |
0.6 ± 0.2 |
33.3 ± 8.8 |
3.8 ± 1.1 |
- |
- |
| buttercup, longbeak (Ranunculus longirostris) | 1.7 ± 1.0 |
0.1 ± 0.1 |
- |
- |
- |
- |
| chara (Chara spp.) |
0.6 ± 0.6 |
0.1 ± 0.1 |
6.7 ± 4.6 |
1.0 ± 0.7 |
- |
- |
| coontail (Ceratophyllum demersum) |
52.6 ± 3.8 |
9.2 ± 0.8 |
83.3 ± 6.9 |
18.3 ± 2.4 |
7.1 ± 1.7 |
0.7 ± 0.2 |
| pondweed, curly (Potamogeton crispus) | 22.9 ± 3.2 |
3.0 ± 0.5 |
23.3 ± 7.9 |
2.9 ± 1.0 |
2.7 ± 1.1 |
0.2 ± 0.1 |
| pondweed, flatstem (P. zosteriformis) | 22.9 ± 3.2 |
2.6 ± 0.4 |
3.3 ± 3.3 |
0.2 ± 0.2 |
- |
- |
| pondweed, horned (Zannichellia palustris) | 0.6 ± 0.6 |
0.1 ± 0.1 |
- |
- |
0.4 ± 0.4 |
<0.1 ± <0.1 |
| pondweed, leafy/small (Potamogeton foliosus/pusillus) | 28.0
± 3.4 |
3.3
± 0.4 |
43.3
± 9.2 |
6.1
± 1.6 |
3.1
± 1.2 |
0.3
± 0.1 |
| pondweed, longleaf (P. nodosus) | 4.6 ± 1.6 |
0.5 ± 0.2 |
- |
- |
0.9 ± 0.6 |
0.1 ± 0.1 |
| pondweed, Richardson's (P. richardsonii) | -
|
-
|
-
|
-
|
-
|
-
|
| pondweed, sago (P. pectinatus) |
18.3 ± 2.9 |
1.9 ± 0.3 |
16.7 ± 6.9 |
2.0 ± 0.9 |
12.4 ± 2.2 |
1.4 ± 0.3 |
| stargrass, water (Heteranthera dubia) | 22.9
± 3.2 |
2.5
± 0.4 |
-
|
-
|
18.2
± 2.6 |
2.7
± 0.4 |
| watermilfoil, Eurasian (Myriophyllum spicatum) | 32.6 ± 3.6 |
4.1 ± 0.5 |
- |
- |
6.7 ± 1.7 |
0.7 ± 0.2 |
| waternymph, nodding (Najas flexilis) | 4.6
± 1.6 |
0.6
± 0.2 |
33.3
± 8.8 |
3.9
± 1.1 |
0.9
± 0.6 |
0.1
± 0.1 |
| waterweed, Canadian (Elodea canadensis) | 37.1 ± 3.7 |
6.2 ± 0.8 |
50.0 ± 9.3 |
10.6 ± 3.1 |
13.3 ± 2.3 |
1.7 ± 0.3 |
| wildcelery (Vallisneria americana) | 8.6
± 2.1 |
0.9
± 0.2 |
-
|
-
|
20.4
± 2.7 |
2.8
± 0.4 |
| all submersed species |
74.9 ± 3.3 |
14.4 ± 0.9 |
93.3 ± 4.6 |
23.2 ± 3.2 |
34.7 ± 3.2 |
5.3 ± 0.5 |
|
Freq |
Cover |
Freq |
Cover |
Freq |
Cover |
|
| lotus, American (Nelumbo lutea) |
14.3 ± 2.7 |
3.3 ± 0.9 |
3.3 ± 3.3 |
0.3 ± 0.3 |
2.2 ± 1.0 |
0.8 ± 0.5 |
| pond-lily, yellow (Nuphar variegata) | 2.3
± 1.1 |
0.3
± 0.2 |
-
|
-
|
-
|
-
|
| waterlily, white (Nymphaea odorata) | 26.9 ± 3.4 |
7.9 ± 1.4 |
66.7 ± 8.8 |
41.3 ± 7.6 |
0.9 ± 0.6 |
0.1 ± 0.1 |
| all rooted floating–leaf species |
36.6
± 3.7 |
11.5
± 1.7 |
66.7
± 8.8 |
41.3
± 7.6 |
2.2
± 0.5 |
0.8
± 0.5 |
Table 3. Continued.
|
Common name (Scientific name) |
Main channel border n = 99 |
Secondary channel n = 120 |
Pool 8 n = 649 |
|||
| Freq |
AI |
Freq |
AI |
Freq |
AI |
|
| bladderwort, common (Utricularia macrorhiza) | - |
- |
- |
- |
2.4 ± 0.5 |
0.3 ± 0.1 |
| buttercup, longbeak (Ranunculus longirostris) | -
|
-
|
-
|
-
|
0.5
± 0.3 |
<0.1
± <0.1 |
| chara (Chara spp.) |
- |
- |
- |
- |
0.4 ± 0.2 |
0.1 ± <0.1 |
| coontail (Ceratophyllum demersum) | 5.1
± 2.2 |
0.3
± 0.2 |
17.5
± 3.5 |
2.4
± 0.5 |
24.2
± 1.5 |
4.0
± 0.3 |
| pondweed, curly (Potamogeton crispus) | 1.0 ± 1.0 |
0.1 ± 0.1 |
3.3 ± 1.6 |
0.3 ± 0.1 |
9.2 ± 1.1 |
1.1 ± 0.1 |
| pondweed, flatstem (P. zosteriformis) | -
|
-
|
5.0
± 2.0 |
0.5
± 0.2 |
7.3
± 0.9 |
0.8
± 0.1 |
| pondweed, horned (Zannichellia palustris) | - |
- |
0.8 ± 0.8 |
0.1 ± 0.1 |
0.5 ± 0.3 |
<0.1 ± <0.1 |
| pondweed, leafy/small (Potamogeton foliosus/pusillus) | 1.0
± 1.0 |
0.1
± 0.1 |
10.8
± 2.8 |
1.2
± 0.4 |
12.7
± 1.2 |
1.5
± 0.2 |
| pondweed, longleaf (P. nodosus) |
- |
- |
0.8 ± 0.8 |
0.1 ± 0.1 |
1.8 ± 0.6 |
0.2 ± 0.1 |
| pondweed, Richardson's (P. richardsonii) | 1.0
± 1.0 |
0.1
± 0.1 |
-
|
-
|
<0.1
± <0.1 |
<0.1
± <0.1 |
| pondweed, sago (P. pectinatus) |
13.1 ± 3.4 |
1.4 ± 0.4 |
10.0 ± 2.8 |
1.2 ± 0.3 |
13.9 ± 1.5 |
1.5 ± 0.2 |
| stargrass, water (Heteranthera dubia) | 11.1
± 3.2 |
1.3
± 0.4 |
14.2
± 3.2 |
1.5
± 0.4 |
18.0
± 1.6 |
2.3
± 0.2 |
| watermilfoil, Eurasian (Myriophyllum spicatum) | 3.0 ± 1.7 |
0.3 ± 0.2 |
5.8 ± 2.1 |
0.5 ± 0.2 |
13.4 ± 1.3 |
1.6 ± 0.2 |
| waternymph, nodding (Najas flexilis) | -
|
-
|
-
|
-
|
3.0
± 0.6 |
0.4
± 0.1 |
| waterweed, Canadian (Elodea canadensis) | 11.1 ± 3.2 |
1.3 ± 0.4 |
10.8 ± 2.8 |
1.5 ± 0.4 |
21.0 ± 1.6 |
3.2 ± 0.3 |
| wildcelery (Vallisneria americana) |
17.2
± 3.8 |
2.2
± 0.5 |
6.7
± 2.3 |
0.7
± 0.2 |
14.3
± 1.5 |
1.8
± 0.2 |
| all submersed species |
30.3 ± 4.6 |
3.7 ± 0.6 |
32.5 ± 4.3 |
4.5 ± 0.6 |
47.7 ± 2.0 |
8.3 ± 0.4 |
|
Freq |
Cover |
Freq |
Cover |
Freq |
Cover |
|
| lotus, American (Nelumbo lutea) |
- |
- |
0.8 ± 0.8 |
0.4 ± 0.4 |
5.4 ± 0.9 |
1.4 ± 0.4 |
| pond-lily, yellow (Nuphar variegata) | -
|
-
|
-
|
-
|
0.6
± 0.3 |
0.1
± 0.1 |
| waterlily, white (Nymphaea odorata) | - |
- |
1.7 ± 1.2 |
0.3 ± 0.3 |
10.8 ± 1.8 |
3.9 ± 0.5 |
| all rooted floating–leaf species |
-
|
-
|
2.5
± 1.4 |
0.8
± 0.5 |
14.3
± 1.2 |
5.4
± 0.6 |
Page Last Modified: April 17, 2018