Upper Midwest Environmental Sciences Center

Table 4.  Percent frequency, abundance index (AI), cover, and standard errors of submersed and rooted floating–leaf vegetation in Pool 4, Upper Mississippi River System, 1999.
Vegetation - Stratified Random Sampling 2000

Table 4.  Percent frequency,  abundance index (AI), cover, and standard errors of submersed and rooted floating–leaf vegetation in Pool 13, Upper Mississippi River System, 2000.

Common name
(Scientific name)
Contiguous
backwater
n = 198
Isolated
backwater
n = 30
Impounded
n = 210
Freq
AI
Freq
AI
Freq
AI
bladderwort, common (Utricularia macrorhiza)
0.5 ± 0.5
0.1 ± 0.1
6.7 ± 4.6
1.0 ± 0.7
-
-
chara
(Chara spp.)
-
-
3.3 ± 3.3
0.4 ± 0.4
-
-
coontail (Ceratophyllum demersum)
47.0 ± 3.6
8.4 ± 0.9
46.7 ± 9.3
8.6 ± 2.0
12.4 ± 2.3
1.8 ± 0.4
pondweed, curly (Potamogeton crispus)
12.6 ± 2.4
1.4 ± 0.3
33.3 ± 8.8
4.4 ± 1.3
6.7 ± 1.7
0.6 ± 0.2
pondweed, flatstem (P. zosteriformis)
1.0 ± 0.7
0.1 ± 0.1
-
-
-
-
pondweed, horned (Zannichellia palustris)
-
-
3.3 ± 3.3
0.2 ± 0.2
-
-
pondweed, leafy/small (Potamogeton foliosus/pusillus)
6.6 ± 1.8
0.6 ± 0.2
16.7 ± 6.9
2.4 ± 1.2
1.9 ± 0.9
0.2 ± 0.1
pondweed, longleaf (P. nodosus)
4.5 ± 1.5
0.5 ± 0.2
3.3 ± 3.3
0.2 ± 0.2
4.8 ± 1.5
0.8 ± 0.3
pondweed, sago
(P. pectinatus)
30.3 ± 3.3
3.7 ± 0.4
46.7 ± 9.3
8.2 ± 1.7
17.1 ± 2.6
2.4 ± 0.4
stargrass, water (Heteranthera dubia)
15.2 ± 2.6
1.8 ± 0.3
-
-
16.2 ± 2.5
2.2 ± 0.4
watermilfoil, Eurasian (Myriophyllum spicatum)
15.7 ± 2.6
1.8 ± 0.3
-
-
20.0 ± 2.8
2.5 ± 0.4
waternymph, nodding (Najas flexilis)
12.6 ± 2.4
1.7 ± 0.3
10.0 ± 5.6
1.3 ± 0.8
-
-
waternymph, southern (N. guadalupensis)
3.5 ± 1.3
0.3 ± 0.1
6.7 ± 4.6
0.5 ± 0.3
0.5 ± 0.5
<0.1 ± <0.1
waterweed, Canadian (Elodea canadensis)
10.6 ± 2.2
1.4 ± 0.3
10.0 ± 5.6
1.8 ± 1.1
1.4 ± 0.8
0.1 ± 0.1
wildcelery (Vallisneria americana)
4.5 ± 1.5
0.6 ± 0.2
-
-
31.4 ± 3.2
5.9 ± 0.6

all submersed species
58.1 ± 3.5
11.0 ± 0.9
53.3 ± 9.3
11.6 ± 2.4
40.5 ± 3.4
8.1 ± 0.7
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American
(Nelumbo lutea)
31.3 ± 3.3
14.8 ± 2.1
36.7 ± 8.9
3.7 ± 0.8
10.5 ± 2.1
4.0 ± 1.0
waterlily, white (Nymphaea odorata)
10.6 ± 2.2
3.5 ± 1.0
6.7 ± 4.6
0.7 ± 0.5
5.2 ± 1.5
1.5 ± 0.5

all rooted floating–leaf species
36.9 ± 3.4
18.8 ± 2.3
40.0 ± 9.1
4.0 ± 0.9
11.4 ± 2.2
5.7 ± 1.2

Table 4. Continued.

Common name
(Scientific name)
Main channel
border
n = 70
Secondary
channel
n = 70
Pool 13
n = 578
Freq
AI
Freq
AI
Freq
AI
bladderwort, common (Utricularia macrorhiza)
-
-
-
-
0.6 ± 0.3
0.1 ± 0.1
chara
(Chara spp.)
-
-
-
-
0.2 ± 0.2
<0.1 ± <0.1
coontail
(Ceratophyllum demersum)
-
-
1.4 ± 1.4
0.1 ± 0.1
25.0 ± 1.7
4.3 ± 0.4
pondweed, curly (Potamogeton crispus)
1.4 ± 1.4
0.1 ± 0.1
-
-
9.5 ± 1.3
1.1 ± 0.2
pondweed, flatstem (P. zosteriformis)
-
-
-
-
0.4 ± 0.3
<0.1 ± <0.1
pondweed, horned (Zannichellia palustris)
-
-
-
-
0.2 ± 0.2
<0.1 ± <0.1
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
-
-
4.2 ± 0.9
0.5 ± 0.1
pondweed, longleaf
(P. nodosus)
-
-
1.4 ± 1.4
0.1 ± 0.1
4.0 ± 0.9
0.5 ± 0.1
pondweed, sago
(P. pectinatus)
5.7 ± 2.8
0.8 ± 0.4
-
-
21.5 ± 1.7
2.9 ± 0.3
stargrass, water (Heteranthera dubia)
-
-
-
-
12.5 ± 1.4
1.6 ± 0.2
watermilfoil, Eurasian (Myriophyllum spicatum)
8.6 ± 3.4
1.0 ± 0.4
1.4 ± 1.4
0.1 ± 0.1
15.1 ± 1.5
1.8 ± 0.2
waternymph, nodding
(Najas flexilis)
-
-
-
-
5.1 ± 0.9
0.7 ± 0.1
waternymph, southern (N. guadalupensis)
-
-
-
-
1.9 ± 0.6
0.2 ± <0.1
waterweed, Canadian (Elodea canadensis)
-
-
-
-
5.0 ± 0.9
0.7 ± 0.1
wildcelery
(Vallisneria americana)
7.1 ± 3.1
1.4 ± 0.7
-
-
16.0 ± 1.5
2.9 ± 0.3

all submersed species
14.3 ± 4.2
2.3 ± 0.8
4.3 ± 2.4
0.3 ± 0.2
43.0 ± 2.1
8.3 ± 0.5
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American
(Nelumbo lutea)
-
-
2.9 ± 2.0
0.3 ± 0.2
18.1 ± 1.6
7.3 ± 0.9
waterlily, white
(Nymphaea odorata)
-
-
-
-
6.5 ± 1.1
1.9 ± 0.4

all rooted floating–leaf species
-
-
2.9 ± 2.0
0.3 ± 0.2
20.7 ± 1.6
9.4 ± 1.0

Page Last Modified: April 17, 2018