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 4, Upper Mississippi River System, 1999.
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Vegetation - Stratified Random Sampling 2000

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