Table 5. Percent frequency, abundance index (AI), cover, and standard errors of submersed and rooted floating–leaf vegetation in Pool 13, Upper Mississippi River System, 2001.
|
Common name (Scientific name)
|
Contiguous backwater
n = 198 |
Isolated backwater
n = 59 |
Impounded
n = 209 |
|||
|
Freq
|
AI
|
Freq
|
AI
|
Freq
|
AI
|
|
| coontail (Ceratophyllum demersum) |
47.0 ± 3.6
|
9.4 ± 1.0
|
55.9 ± 6.5
|
9.5 ± 1.7
|
16.3 ± 2.6
|
3.2 ± 0.6
|
| pondweed, curly (Potamogeton crispus) |
11.1 ± 2.2
|
1.5 ± 0.3
|
-
|
-
|
2.4 ± 1.1
|
0.3 ± 0.1
|
| pondweed, flatstem (P. zosteriformis) |
0.5 ± 0.5
|
<0.1 ± <0.1
|
3.4 ± 2.4
|
0.3 ± 0.2
|
-
|
-
|
| pondweed, leafy/small (P. foliosus/pusillus) |
14.1 ± 2.5
|
1.4 ± 0.3
|
6.8 ± 3.3
|
0.6 ± 0.3
|
3.3 ± 1.2
|
0.5 ± 0.2
|
| pondweed, longleaf (P. nodosus) |
6.6 ± 1.8
|
0.6 ± 0.2
|
1.7 ± 1.7
|
0.4 ± 0.4
|
6.7 ± 1.7
|
0.9 ± 0.3
|
| pondweed, sago (P. pectinatus) |
35.9 ± 3.4
|
5.9 ± 0.7
|
32.2 ± 6.1
|
4.6 ± 0.9
|
13.4 ± 2.4
|
2.0 ± 0.4
|
| stargrass, water (Heteranthera dubia) |
9.6 ± 2.1
|
1.0 ± 0.2
|
-
|
-
|
13.4 ± 2.4
|
1.7 ± 0.4
|
| watermilfoil, Eurasian (Myriophyllum spicatum) |
11.1 ± 2.2
|
1.2 ± 0.3
|
-
|
-
|
11.0 ± 2.2
|
1.3 ± 0.3
|
| waternymph, nodding (Najas flexilis) |
18.2 ± 2.7
|
2.4 ± 0.4
|
-
|
-
|
1.0 ± 0.7
|
0.2 ± 0.1
|
| waternymph, southern (N. guadalupensis) |
0.5 ± 0.5
|
<0.1 ± <0.1
|
-
|
-
|
3.8 ± 1.3
|
0.4 ± 0.1
|
| waterweed, Canadian (Elodea canadensis) |
11.1 ± 2.2
|
1.2 ± 0.3
|
5.1 ± 2.9
|
0.7 ± 0.4
|
4.8 ± 1.5
|
0.5 ± 0.2
|
| wildcelery (Vallisneria americana) |
5.1 ± 1.6
|
0.5 ± 0.2
|
-
|
-
|
27.8 ± 3.1
|
6.0 ± 0.8
|
| all submersed species |
55.6 ± 3.5
|
12.2 ± 1.1
|
57.6 ± 6.5
|
11.1 ± 1.7
|
38.3 ± 3.4
|
9.4 ± 1.0
|
|
Freq
|
Cover
|
Freq
|
Cover
|
Freq
|
Cover
|
|
| lotus, American (Nelumbo lutea) |
37.9 ± 3.5
|
16.1 ± 2.1
|
11.9 ± 4.2
|
1.2 ± 0.4
|
15.8 ± 2.5
|
7.5 ± 1.5
|
| waterlily, white (Nymphaea odorata) |
9.6 ± 2.1
|
3.2 ± 0.9
|
5.1 ± 2.9
|
0.5 ± 0.3
|
7.7 ± 1.8
|
1.7 ± 0.6
|
| all rooted floating–leaf species |
39.9 ± 3.5
|
18.8 ± 2.3
|
15.3 ± 4.7
|
1.5 ± 0.5
|
17.2 ± 2.6
|
9.5 ± 1.8
|
Table 5. Continued.
|
Common name (Scientific name) |
Main channel border n = 70 |
Secondary channel n = 70 |
Pool 13 n = 606 |
|||
| Freq
|
AI
|
Freq
|
AI
|
Freq
|
AI
|
|
| coontail (Ceratophyllum demersum) | -
|
-
|
5.7
± 2.8 |
0.5
± 0.3 |
27.5
± 1.7 |
5.3
± 0.5 |
| pondweed, curly (Potamogeton crispus) | -
|
-
|
-
|
-
|
5.0
± 0.9 |
0.6
± 0.1 |
| pondweed, flatstem (P. zosteriformis) | -
|
-
|
-
|
-
|
0.4
± 0.2 |
<0.1
± <0.1 |
| pondweed, leafy/small (P. foliosus/pusillus) | -
|
-
|
-
|
-
|
6.9
± 1.1 |
0.7
± 0.1 |
| pondweed, longleaf (P. nodosus) | -
|
-
|
1.4
± 1.4 |
0.2
± 0.2 |
5.5
± 1.0 |
0.7
± 0.1 |
| pondweed, sago (P. pectinatus) | 7.1
± 3.1 |
1.0
± 0.5 |
8.6
± 3.4 |
0.8
± 0.3 |
21.7
± 1.7 |
3.4
± 0.3 |
| stargrass, water (Heteranthera dubia) | 1.4
± 1.4 |
0.1
± 0.1 |
1.4
± 1.4 |
0.1
± 0.1 |
9.5
± 1.3 |
1.1
± 0.2 |
| watermilfoil, Eurasian (Myriophyllum spicatum) | 2.9
± 2.0 |
0.3
± 0.2 |
-
|
-
|
9.0
± 1.2 |
1.0
± 0.2 |
| waternymph, nodding (Najas flexilis) | -
|
-
|
-
|
-
|
6.9
± 1.0 |
0.9
± 0.2 |
| waternymph, southern (N. guadalupensis) | -
|
-
|
-
|
-
|
1.9
± 0.6 |
0.2
± 0.1 |
| waterweed, Canadian (Elodea canadensis) | -
|
-
|
-
|
-
|
6.3
± 1.0 |
0.7
± 0.1 |
| wildcelery (Vallisneria americana) | 7.1
± 3.1 |
1.4
± 0.7 |
1.4
± 1.4 |
0.1
± 0.1 |
14.6
± 1.5 |
2.9
± 0.3 |
| all submersed species | 10.0
± 3.6 |
1.9
± 0.8 |
14.3
± 4.2 |
1.5
± 0.5 |
41.7
± 2.0 |
9.4
± 0.6 |
| Freq
|
Cover
|
Freq
|
Cover
|
Freq
|
Cover
|
|
| lotus, American (Nelumbo lutea) | -
|
-
|
1.4
± 1.4 |
0.4
± 0.4 |
21.2
± 1.7 |
9.1
± 1.0 |
| waterlily, white (Nymphaea odorata) | -
|
-
|
-
|
-
|
7.1
± 1.1 |
1.9
± 0.4 |
| all rooted floating–leaf species | -
|
-
|
1.4
± 1.4 |
0.4
± 0.4 |
22.7
± 1.7 |
11.0
± 1.1 |
Page Last Modified: April 17, 2018