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 2001

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, 2001.

Common name
(Scientific name)		 Contiguous backwater, upper
n = 100 		Contiguous backwater, lower
n = 176 		Isolated  backwater
n = 50
Freq
AI
Freq
Al
Freq
Al
bladderwort, common (Utricularia macrorhiza)
-
-
-
-
2.0.± 2.0
0.1.± 0.1
buttercup, longbeak (Ranunculus longirostris)
-
-
-
-
2.0.± 2.0
0.1± 0.1
chara
(Chara spp.)
-
-
1.1 ± 0.8
0.1 ± 0.1
4.0 ± 2.8
0.3 ± 0.2
coontail 
(Ceratophyllum demersum)
 3.0.± 1.7
0.2 ± 0.1
43.2. ± 3.7
6.3 ± 0.7
64.0 ± 6.9
12.7 ± 1.8
pondweed, curly (Potamogeton crispus)
-
-
11.4 ± 2.4
1.0 ± 0.2
6.0 ± 3.4
0.4 ± 0.2
pondweed, flatstem (P. zosteriformis)
-
-
6.8 ± 1.9
0.7 ± 0.2
8.0 ± 3.9
0.8 ± 0.4
pondweed, horned (Zannichellia palustris)
-
-
1.7 ± 1.0
0.2 ± 0.1
-
-
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
16.5 ± 2.8
1.9 ± 0.4
24.0 ± 6.1
3.1 ± 0.8
pondweed, longleaf 
(P. nodosus)
-
-
4.5 ± 1.6
0.6 ± 0.2
18.0 ± 5.5
1.8 ± 0.6
pondweed, Richardson's (P. richardsonii)
-
-
-
-
-
-
pondweed, sago
(P. pectinatus)
11.0 ± 3.1
1.1 ± 0.3
15.3 ± 2.7
1.8 ± 0.4
52.0 ± 7.1
7.6 ± 1.1
stargrass, water (Heteranthera dubia)
-
-
37.5 ± 3.7
4.6 ± 0.5
10.0 ± 4.3
1.4 ± 0.6
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
23.9 ± 3.2
2.7 ± 0.4
2.0 ± 2.0
0.1 ± 0.1
waternymph, nodding
(Najas flexilis)
-
-
9.1 ± 2.2
0.9 ± 0.2
-
-
waterweed, Canadian (Elodea canadensis)
-
-
27.3 ± 3.4
3.2 ± 0.4
28.0 ± 6.4
3.6 ± 0.9
wildcelery
(Vallisneria americana)
-
-
30.1 ± 3.5
4.6 ± 0.6
4.0 ± 2.8
0.4 ± 0.3

all submersed species
14.0 ± 3.5
1.3 ± 0.4
71.0 ± 3.4
12.0 ± 0.7
76.0 ± 6.1
15.1 ± 1.7
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American (Nelumbo lutea)
-
-
3.4 ± 1.4
0.8 ± 0.4
-
-
waterlily, white
(Nymphaea odorata)
3.0 ± 1.7
0.3 ± 0.2
13.1 ± 2.5
2.6 ± 0.7
50.0 ± 7.1
5.0 ± 0.7

all rooted floating-leaf species
3.0 ± 1.7
0.3 ± 0.2
15.9 ± 2.8
3.3 ± 0.8
50.0 ± 7.1
5.0 ± 0.7

Table 2. Continued.

Common name
(Scientific name)
Lake Pepin, upper
n = 75
Lake Pepin, lower
n  = 75
Main channel border,
upper
n  = 30
Freq
Al
Freq
Al
Freq
Al
bladderwort, common (Utricularia macrorhiza)
-
-
-
-
-
-
buttercup, longbeak (Ranunculus longirostris)
-
-
-
-
-
-
chara
(Chara spp.)
-
-
-
-
-
-
coontail 
(Ceratophyllum demersum)
1.3 ± 1.3
0.1.± 0.1
-
-
3.3 ± 3.3
0.4 ± 0.4
pondweed, curly (Potamogeton crispus)
-
-
-
-
-
-
pondweed, flatstem (P. zosteriformis)
-
-
-
-
-
-
pondweed, horned (Zannichellia palustris)
-
-
-
-
-
-
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
2.7 ± 1.9
0.3 ± 0.3
-
-
pondweed, longleaf 
(P. nodosus)
-
-
-
-
-
-
pondweed, Richardson's (P. richardsonii)
-
-
1.3 ± 1.3
0.1.± 0.1
-
-
pondweed, sago
(P. pectinatus)
2.7 ± 1.9
0.2 ± 0.2
10.7 ± 3.6
1.2 ± 0.4
-
-
stargrass, water (Heteranthera dubia)
1.3 ± 1.3
0.1.± 0.1
17.3 ± 4.4
2.3 ± 0.6
-
-
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
-
-
-
-
waternymph, nodding
(Najas flexilis)
-
-
25.3 ± 5.1
4.0 ± 0.8
-
-
waterweed, Canadian (Elodea canadensis)
-
-
6.7 ± 2.9
0.7 ± 0.3
-
-
wildcelery
(Vallisneria americana)
-
-
12.0 ± 3.8
1.3 ± 0.5
-
-

all submersed species
5.3 ± 2.6
0.4 ± 0.2
41.3 ± 5.7
5.9 ± 0.9
3.3 ± 3.3
0.4 ± 0.4
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American
(Nelumbo lutea)
-
-
-
-
-
-
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)
-
-
-
-
-
-
buttercup, longbeak
(Ranunculus longirostris)
-
-
-
-
-
-
chara
(Chara spp.)
-
-
-
-
-
-
coontail 
(Ceratophyllum demersum)
5.0 ± 3.5
0.5 ± 0.4
-
-
20.0 ± 5.2
1.8 ± 0.5
pondweed, curly (Potamogeton crispus)
7.5 ± 4.2
0.7 ± 0.4
-
-
11.7 ± 4.2
1.6 ± 0.6
pondweed, flatstem (P. zosteriformis)
-
-
-
-
3.3 ± 2.3
0.2 ± 0.2
pondweed, horned (Zannichellia palustris)
-
-
-
-
-
-
pondweed, leafy/small (Potamogeton foliosus/pusillus)
5.0 ± 3.5
0.7 ± 0.5
-
-
1.7 ± 1.7
0.1 ± 0.1
pondweed, longleaf 
(P. nodosus)
-
-
-
-
-
-
pondweed, Richardson's (P. richardsonii)
2.5 ± 2.5
0.3 ± 0.3
-
-
-
-
pondweed, sago
(P. pectinatus)
10.0 ± 4.8
1.7 ± 1.0
-
-
11.7 ± 4.2
1.2 ± 0.5
stargrass, water (Heteranthera dubia)
17.5 ± 6.1
2.1 ± 0.8
-
-
26.7 ± 5.8
3.6 ± 0.9
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
-
-
5.0 ± 2.8
0.5 ± 0.3
waternymph, nodding
(Najas flexilis)
-
-
-
-
1.7 ± 1.7
0.1 ± 0.1
waterweed, Canadian (Elodea canadensis)
15.0 ± 5.7
1.5 ± 0.6
-
-
16.7 ± 4.9
2.2 ± 0.7
wildcelery
(Vallisneria americana)
20.0 ± 6.4
4.0 ± 1.4
-
-
25.0 ± 5.6
3.9 ± 0.9

all submersed species
22.5 ± 6.7
4.9 ± 1.5
-
-
31.7 ± 6.1
5.2 ± 1.1
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American
(Nelumbo lutea)
-
-
-
-
-
-
waterlily, white
(Nymphaea odorata)
-
-
-
-
1.7 ± 1.7
0.2 ± 0.2

all rooted floating-leaf species
-
-
-
-
1.7 ± 1.7
0.2 ± 0.2

Table 2.  Continued. 

Common name
(Scientific name) 		Pool 4, upper
n = 245 		Pool 4, lower
n = 351 		Pool 4
n = 646
Freq
Al
Freq
Al
Freq
Al
bladderwort, common (Utricularia macrorhiza)
-
-
-
-
0.1 ± 0.1
<0.1± <0.1
buttercup, longbeak (Ranunculus longirostris)
-
-
-
-
0.1 ± 0.1
<0.1± <0.1
chara
(Chara spp.)
-
-
0.7 ± 0.5
0.1 ± 0.1
0.6 ± 0.3
0.1 ± <0.1
coontail 
(Ceratophyllum demersum)
1.7 ± 0.9
0.1 ± 0.1
29.6 ± 2.4
4.1 ± 0.4
19.4 ± 1.4
2.8 ± 0.1
pondweed, curly (Potamogeton crispus)
-
-
9.1 ± 1.6
0.9 ± 0.2
5.1 ± 0.9
0.5 ± 0.1
pondweed, flatstem (P. zosteriformis)
-
-
4.6 ± 1.2
0.5 ± 0.1
2.8 ± 0.7
0.3 ± 0.1
pondweed, horned (Zannichellia palustris)
-
-
1.1 ± 0.6
0.1 ± 0.1
0.6 ± 0.3
0.1 ± <0.1
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
11.3 ± 1.8
1.3 ± 0.2
7.1 ± 1.0
0.9 ± 0.1
pondweed, longleaf 
(P. nodosus)
-
-
2.8 ± 1.0
0.4 ± 0.1
2.3 ± 0.6
0.3 ± 0.1
pondweed, Richardson's (P. richardsonii)
-
-
0.4 ± 0.3
<0.1 ± <0.1
0.2 ± 0.2
<0.1± <0.1
pondweed, sago
(P. pectinatus)
4.5.± 1.4
0.4 ± 0.1
13.6 ± 1.9
1.6 ± 0.3
11.5 ± 1.2
1.4 ± 0.2
stargrass, water (Heteranthera dubia)
0.8 ± 0.8
0.1 ± 0.1
31.0 ± 2.5
3.9 ± 0.4
17.4 ± 1.4
2.2 ± 0.2
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
15.4 ± 2.0
1.8 ± 0.3
8.4 ± 1.2
1.0 ± 0.1
waternymph, nodding
(Najas flexilis)
-
-
10.3 ± 1.6
1.2 ± 0.2
5.5 ± 0.9
0.7 ± 0.1
waterweed, Canadian (Elodea canadensis)
-
-
21.4 ± 2.3
2.5 ± 0.3
12.7 ± 1.3
1.5 ± 0.2
wildcelery
(Vallisneria americana)
-
-
25.5 ± 2.4
3.9 ± 0.4
13.9 ± 1.3
2.1 ± 0.2

all submersed species
7.0 ± 1.8
0.6 ± 0.2
57.1 ± 2.5
9.6 ± 0.5
36.9 ± 1.6
6.0 ± 0.3
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American
(Nelumbo lutea)
-
-
2.1 ± 0.9
0.5 ± 0.3
1.1 ± 0.1
0.3 ± 0.1
waterlily, white
(Nymphaea odorata)
0.8 ± 0.6
0.1 ± <0.1
8.3 ± 1.6
1.6 ± 0.4
7.0 ± 0.9
1.1 ± 0.2

all rooted floating-leaf species
0.8 ± 0.6
0.1 ± <0.1
10.1 ± 1.7
2.1 ± 0.5
7.9 ± 1.0
1.3 ± 0.3

Page Last Modified: April 17, 2018