Upper Midwest Environmental Sciences Center

Table 2. 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 2. Percent frequency, abundance index (AI), cover, and standard errors of submersed and rooted floating-leaf vegetation in Pool 4, Upper Mississippi River System, 2000.

Common name
(Scientific name)
Contiguous
backwater, upper
n = 100
Contiguous
backwater, lower
n = 179
Isolated
backwater
n = 32
Freq
AI
Freq
AI
Freq
AI
bladderwort, common (Utricularia macrorhiza)
-
-
0.6 ± 0.6
<0.1 ± <0.1
-
-
chara
(Chara spp.)
-
-
1.7 ± 1.0
0.2 ± 0.1
6.3 ± 4.3
0.9 ± 0.6
coontail (Ceratophyllum demersum)
4.0 ± 2.0
0.5 ± 0.3
30.2 ± 3.4
4.5 ± 0.7
65.6 ± 8.5
18.2 ± 4.6
pondweed, alpine (Potamogeton alpinus)
-
-
0.6 ± 0.6
0.1 ± 0.1
-
-
pondweed, curly (Potamogeton crispus)
1.0 ± 1.0
0.1 ± 0.1
7.8 ± 2.0
1.0 ± 0.3
28.1 ± 8.1
3.2 ± 1.0
pondweed, flatstem (P. zosteriformis)
-
-
7.3 ± 1.9
0.7 ± 0.2
3.1 ± 3.1
0.2 ± 0.2
pondweed, horned (Zannichellia palustris)
-
-
1.7 ± 1.0
0.2 ± 0.1
6.3 ± 4.3
0.7 ± 0.5
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
7.3 ± 1.9
0.7 ± 0.2
28.1 ± 8.1
3.2 ± 1.1
pondweed, longleaf
(P. nodosus)
2.0 ± 1.4
0.2 ± 0.2
1.7 ± 1.0
0.2 ± 0.1
9.4 ± 5.2
1.2 ± 0.7
pondweed, sago
(P. pectinatus)
15.0 ± 3.6
1.5 ± 0.4
8.9 ± 2.1
0.9 ± 0.2
43.8 ± 8.9
5.0 ± 1.1
stargrass, water (Heteranthera dubia)
-
-
32.4 ± 3.5
4.0 ± 0.5
6.3 ± 4.3
0.6 ± 0.5
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
23.5 ± 3.2
2.6 ± 0.4
15.6 ± 6.5
4.9 ± 2.4
waternymph, nodding (Najas flexilis)
-
-
4.5 ± 1.5
0.7 ± 0.2
-
-
waterweed, Canadian (Elodea canadensis)
-
-
23.5 ± 3.2
3.1 ± 0.5
31.3 ± 8.3
6.7 ± 2.5
wildcelery
(Vallisneria americana)
-
-
31.3 ± 3.5
4.4 ± 0.5
3.1 ± 3.1
0.2 ± 0.2

all submersed species
18.0 ± 3.9
2.0 ± 0.5
64.2 ± 3.6
10.7 ± 0.8
81.3 ± 7.0
26.7 ± 4.9
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American
(Nelumbo lutea)
-
-
3.4 ± 1.3
0.6 ± 0.3
-
-
pond-lily, yellow
(Nuphar variegata)
-
-
1.1 ± 0.8
0.1 ± 0.1
-
-
waterlily, white (Nymphaea odorata)
5.0 ± 2.2
3.7 ± 1.8
16.2 ± 2.8
1.8 ± 0.3
46.9 ± 9.0
14.1 ± 4.1

all rooted floating-leaf species
5.0 ± 2.2
3.7 ± 1.8
19.6 ± 3.0
2.4 ± 0.4
46.9 ± 9.0
14.1 ± 4.1

Table 2. Continued.

Common name
(Scientific name)
Lake Pepin,
upper
n = 75
Lake Pepin,
lower
n = 75
Main channel
border, upper
n = 30
Freq
AI
Freq
AI
Freq
AI
bladderwort, common (Utricularia macrorhiza)
-
-
-
-
-
-
chara
(Chara spp.)
-
-
-
-
-
-
coontail
(Ceratophyllum demersum)
-
-
2.7 ± 1.9
0.3 ± 0.2
-
-
pondweed, alpine (Potamogeton alpinus)
-
-
-
-
-
-
pondweed, curly (Potamogeton crispus)
-
-
-
-
-
-
pondweed, flatstem
(P. zosteriformis)
-
-
-
-
-
-
pondweed, horned (Zannichellia palustris)
-
-
-
-
-
-
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
10.7 ± 3.6
0.9 ± 0.3
-
-
pondweed, longleaf
(P. nodosus)
-
-
1.3 ± 1.3
0.2 ± 0.2
-
-
pondweed, sago
(P. pectinatus)
14.7 ± 4.1
1.3 ± 0.4
20.0 ± 4.6
2.6 ± 0.6
3.3 ± 3.3
0.2 ± 0.2
stargrass, water
(Heteranthera dubia)
-
-
5.3 ± 2.6
0.5 ± 0.3
-
-
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
2.7 ± 1.9
0.2 ± 0.2
-
-
waternymph, nodding
(Najas flexilis)
-
-
24.0 ± 5.0
3.5 ± 0.8
-
-
waterweed, Canadian (Elodea canadensis)
-
-
24.0 ± 5.0
3.1 ± 0.7
-
-
wildcelery
(Vallisneria americana)
-
-
4.0 ± 2.3
0.5 ± 0.3
-
-

all submersed species
14.7 ± 4.1
1.3 ± 0.4
46.7 ± 5.8
6.4 ± 0.9
3.3 ± 3.3
0.2 ± 0.2
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American
(Nelumbo lutea)
-
-
-
-
-
-
pond-lily, yellow
(Nuphar variegata)
-
-
-
-
-
-
waterlily, white
(Nymphaea odorata)
-
-
-
-
-
-

all rooted floating-leaf species
-
-
-
-
-
-

Table 2. Continued.

Common name
(Scientific name)
Main channel
border, lower
n = 40
Secondary
channel, upper
n = 40
Secondary
channel, lower
n = 60
Freq
AI
Freq
AI
Freq
AI
bladderwort, common (Utricularia macrorhiza)
-
-
-
-
-
-
chara
(Chara spp.)
-
-
-
-
-
-
coontail
(Ceratophyllum demersum)
2.5 ± 2.5
0.3 ± 0.3
-
-
16.7 ± 4.9
2.5 ± 0.8
pondweed, alpine
(Potamogeton alpinus)
-
-
-
-
1.7 ± 1.7
0.1 ± 0.1
pondweed, curly
(Potamogeton crispus)
7.5 ± 4.2
0.8 ± 0.5
-
-
18.3 ± 5.0
2.7 ± 0.8
pondweed, flatstem
(P. zosteriformis)
-
-
-
-
6.7 ± 3.2
0.5 ± 0.3
pondweed, horned
(Zannichellia palustris)
-
-
-
-
-
-
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
-
-
5.0 ± 2.8
0.6 ± 0.3
pondweed, longleaf
(P. nodosus)
2.5 ± 2.5
0.3 ± 0.3
-
-
11.7 ± 4.2
1.5 ± 0.6
pondweed, sago
(P. pectinatus)
5.0 ± 3.5
0.3 ± 0.2
-
-
15.0 ± 4.6
1.2 ± 0.4
stargrass, water
(Heteranthera dubia)
15.0 ± 5.7
1.1 ± 0.4
-
-
30.0 ± 6.0
3.8 ± 0.8
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
-
-
15.0 ± 4.6
1.6 ± 0.5
waternymph, nodding
(Najas flexilis)
-
-
-
-
-
-
waterweed, Canadian (Elodea canadensis)
5.0 ± 3.5
0.7 ± 0.5
-
-
21.7 ± 5.4
3.1 ± 0.9
wildcelery
(Vallisneria americana)
12.5 ± 5.3
1.5 ± 0.7
-
-
31.7 ± 6.1
4.0 ± 0.8

all submersed species
22.5 ± 6.7
2.4 ± 0.8
-
-
45.0 ± 6.5
7.2 ± 1.2
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American
(Nelumbo lutea)
-
-
-
-
-
-
pond-lily, yellow
(Nuphar variegata)
-
-
-
-
-
-
waterlily, white
(Nymphaea odorata)
-
-
-
-
5.0 ± 2.8
0.5 ± 0.3

all rooted floating-leaf species
-
-
-
-
5.0 ± 2.8
0.5 ± 0.3

Table 2. Continued.

Common name
(Scientific name)
Pool 4, upper
n = 245
Pool 4, lower
n = 354
Pool 4
n = 631
Freq
AI
Freq
AI
Freq
AI
bladderwort, common (Utricularia macrorhiza)
-
-
0.3 ± 0.3
<0.1 ± <0.1
0.2 ± 0.2
<0.1 ± <0.1
chara
(Chara spp.)
-
-
1.0 ± 0.6
0.1 ± 0.1
0.8 ± 0.4
0.1 ± <0.1
coontail (Ceratophyllum demersum)
1.1 ± 0.5
0.1 ± 0.1
21.4 ± 2.2
3.2 ± 0.4
14.8 ± 1.3
2.6 ± 0.3
pondweed, alpine (Potamogeton alpinus)
-
-
0.5 ± 0.4
0.1 ± 0.1
0.3 ± 0.2
<0.1 ± <0.1
pondweed, curly
(P. crispus)
0.3 ± 0.3
<0.1 ± <0.1
7.7 ± 1.4
1.0 ± 0.2
5.4 ± 0.9
0.7 ± 0.1
pondweed, flatstem (P. zosteriformis)
-
-
5.3 ± 1.3
0.5 ± 0.1
3.0 ± 0.7
0.3 ± 0.1
pondweed, horned (Zannichellia palustris)
-
-
1.0 ± 0.6
0.1 ± 0.1
0.8 ± 0.4
0.1 ± <0.1
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
7.0 ± 1.4
0.7 ± 0.2
5.0 ± 0.8
0.5 ± 0.1
pondweed, longleaf (P. nodosus)
0.5 ± 0.4
0.1 ± <0.1
2.9 ± 0.8
0.3 ± 0.1
2.2 ± 0.5
0.3 ± 0.1
pondweed, sago (P. pectinatus)
13.0. ± 2.7
1.2 ± 0.3
11.3 ± 1.7
1.2 ± 0.2
13.4 ± 1.5
1.4 ± 0.2
stargrass, water (Heteranthera dubia)
-
-
25.9 ± 2.4
3.1 ± 0.3
14.2 ± 1.3
1.7 ± 0.2
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
16.8 ± 2.1
1.8 ± 0.2
9.7 ± 1.2
1.2 ± 0.2
waternymph, nodding (Najas flexilis)
-
-
7.0 ± 1.0
1.0 ± 0.2
3.8 ± 0.7
0.5 ± 0.1
waterweed, Canadian (Elodea canadensis)
-
-
21.8 ± 2.3
2.9 ± 0.3
13.1 ± 1.3
1.8 ± 0.2
wildcelery (Vallisneria americana)
-
-
24.9 ± 2.4
3.4 ± 0.4
13.5 ± 1.3
1.9 ± 0.2

all submersed species
13.8 ± 2.7
1.3 ± 0.3
55.3 ± 2.6
8.8 ± 0.5
39.1 ± 1.8
6.5 ± 0.4
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American
(Nelumbo lutea)
-
-
2.1 ± 0.8
0.3 ± 0.2
1.1 ± 0.5
0.2 ± 0.1
pond-lily, yellow (Nuphar variegata)
-
-
0.7 ± 0.5
0.1 ± <0.1
0.4 ± 0.3
<0.1 ± <0.1
waterlily, white (Nymphaea odorata)
1.3 ± 0.6
1.0 ± 0.5
10.7 ± 1.8
1.2 ± 0.2
8.3 ± 1.0
1.7 ± 0.3

all rooted floating-leaf species
1.3 ± 0.6
1.0 ± 0.5
12.8 ± 1.9
1.6± 0.3
9.4 ± 1.1
1.9± 0.3

Page Last Modified: April 17, 2018