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, 2002.
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Vegetation - Stratified Random Sampling 2002

 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, 2002.

Common name
(Scientific name)		 Contiguous 
backwater, upper
n = 100		 Contiguous 
backwater, lower
n = 180		 Isolated  backwater
n = 30
Freq 
AI
Freq 
Al
Freq 
Al
 bladderwort, common 
(Utricularia macrorhiza) 
-
-
-
-
6.7 ± 4.6
1.1 ± 0.8
 buttercup, longbeak 
(Ranunculus longirostris) 
-
-
-
-
3.3 ± 3.3
0.4 ± 0.4
 chara 
(Chara spp.) 
-
-
0.6 ± 0.6
0.1 ± 0.1
-
-
 coontail 
(Ceratophyllum demersum) 
7.0 ± 2.6
0.9 ± 0.3
 33.9 ± 3.5 
4.4 ± 0.5
 73.3 ± 8.2 
14.0 ± 2.3
 pondweed, curly 
(Potamogeton crispus) 
-
-
13.9 ± 2.6
1.3 ± 0.3
26.7 ± 8.2
3.0 ± 1.0
 pondweed, flatstem 
(P. zosteriformis) 
-
-
11.1 ± 2.3
1.3 ± 0.3
10.0 ± 5.6
1.0 ± 0.7
 pondweed, horned 
(Zannichellia palustris) 
-
-
0.6 ± 0.6
0.1 ± 0.1
-
-
 pondweed, leafy/small 
(Potamogeton foliosus/pusillus) 
2.0 ± 1.4
0.2 ± 0.2
16.7 ± 2.8
1.9 ± 0.3
40.0 ± 9.1
5.9 ± 1.4
 pondweed, longleaf 
(P. nodosus) 
1.0 ± 1.0
0.2 ± 0.2
5.6 ± 1.7
0.6 ± 0.2
23.3 ± 7.9
2.4 ± 0.9
 pondweed, sago 
(P. pectinatus) 
 14.0 ± 3.5 
1.6 ± 0.4
8.9 ± 2.1
0.9 ± 0.2
63.3 ± 8.9
9.2 ± 1.4
 stargrass, water 
(Heteranthera dubia)
-
-
30.6 ± 3.4
3.6 ± 0.5
20.0 ± 7.4
1.5 ± 0.6
 watermilfoil, Eurasian 
(Myriophyllum spicatum)
-
-
28.9 ± 3.4
3.6 ± 0.5
-
-
 watermilfoil, northern
(Myriophyllum sibiricum)
-
-
0.6 ± 0.6
0.1 ± 0.1
3.3 ± 3.3 
0.9 ± 0.9
 waternymph, nodding 
(Najas flexilis) 
1.0 ± 1.0
0.1 ± 0.1
2.2 ± 1.1
0.2 ± 0.1
16.7 ± 6.9
1.9 ± 0.9
 waterweed, Canadian 
(Elodea canadensis) 
2.0 ± 1.4
0.3 ± 0.2
30.0 ± 3.4
3.8 ± 0.5
33.3 ± 8.8
4.0 ± 1.2
 wildcelery
(Vallisneria americana) 
-
-
37.8 ± 3.6
5.3 ± 0.6
-
-

 all submersed species 
16.0 ± 3.7
2.1 ± 0.5
67.2 ± 3.5
10.2 ± 0.6
83.3 ± 6.9
17.5 ± 2.1
 
Freq 
Cover 
Freq 
Cover 
Freq 
Cover 
 lotus, American 
(Nelumbo lutea) 
-
-
5.0 ± 1.6
0.5 ± 0.2
-
-
 pond-lily, yellow 
(Nuphar variegata)
-
-
0.6 ± 0.6
0.1 ± 0.1
-
-
 waterlily, white 
(Nymphaea odorata) 
5.0 ± 2.2
0.7 ± 0.4
19.4 ± 3.0
2.6 ± 0.6
46.7 ± 9.3
5.3 ± 1.2

 all rooted floating-leaf species 
5.0 ± 2.2
0.7 ± 0.4
21.7 ± 3.1
2.8 ± 0.6
46.7 ± 9.3
5.3 ± 1.2

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) 
-
-
4.0 ± 2.3
0.3 ± 0.2
  3.3 ± 3.3  
 0.6 ± 0.6 
 pondweed, curly 
(Potamogeton crispus) 
-
 -
1.3 ± 1.3
0.1 ± 0.1
-
-
 pondweed, flatstem 
(P. zosteriformis) 
-
-
-
-
-
-
 pondweed, horned 
(Zannichellia palustris) 
-
-
-
-
-
-
 pondweed, leafy/small 
(Potamogeton foliosus/pusillus) 
-
-
9.3 ± 3.4
0.8 ± 0.3
-
-
 pondweed, longleaf 
(P. nodosus) 
-
-
-
-
-
-
 pondweed, sago 
(P. pectinatus) 
   8.0 ± 3.2   
0.7 ± 0.3
6.7 ± 2.9
0.7 ± 0.3
-
-
 stargrass, water 
(Heteranthera dubia)
-
-
 14.7 ± 4.1 
1.4 ± 0.4
-
-
 watermilfoil, Eurasian 
(Myriophyllum spicatum)
-
-
-
-
-
-
 watermilfoil, northern
(Myriophyllum sibiricum)
-
-
-
-
-
-
 waternymph, nodding
(Najas flexilis) 
-
-
16.0 ± 4.3
2.2 ± 0.6
-
-
 waterweed, Canadian 
(Elodea canadensis) 
-
-
6.7 ± 2.9
0.5 ± 0.2
-
-
 wildcelery
(Vallisneria americana) 		 April 14, 2006 -
-
10.7 ± 3.6
1.6 ± 0.6
-
-

 all submersed species 
8.0 ± 3.2
0.7 ± 0.3
25.3 ± 5.1
4.0 ± 0.8
3.3 ± 3.3
0.6 ± 0.6
 
    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
Al
Freq 
Al
Freq 
Al
 bladderwort, common 
(Utricularia macrorhiza) 
-
-
-
-
-
-
 buttercup, longbeak 
(Ranunculus longirostris) 
-
-
-
-
-
-
 chara 
(Chara spp.) 
-
-
-
-
-
-
 coontail 
(Ceratophyllum demersum) 
5.0 ± 3.5
0.3 ± 0.2
-
-
18.3 ± 5.0
1.7 ± 0.5
 pondweed, curly 
(Potamogeton crispus) 
7.5 ± 4.2
 0.7 ± 0.5
-
-
8.3 ± 3.6
1.3 ± 0.6
 pondweed, flatstem 
(P. zosteriformis) 
-
-
-
-
3.3 ± 2.3
0.2 ± 0.2
 pondweed, horned 
(Zannichellia palustris) 
-
-
-
-
-
-
 pondweed, leafy/small 
(Potamogeton foliosus/pusillus) 
-
-
-
-
8.3 ± 3.6
0.8 ± 0.4
 pondweed, longleaf 
(P. nodosus) 
-
-
-
-
1.7 ± 1.7
0.2 ± 0.2
 pondweed, sago 
(P. pectinatus) 
 15.0 ± 5.7 
1.7 ± 0.7
  5.0 ± 3.5  
0.5 ± 0.4
5.0 ± 2.8
0.6 ± 0.4
 stargrass, water 
(Heteranthera dubia)
10.0 ± 4.8
0.9 ± 0.4
-
-
 13.3 ± 4.4 
1.7± 0.6
 watermilfoil, Eurasian 
(Myriophyllum spicatum)
2.5 ± 2.5
0.3 ± 0.3
-
-
8.3 ± 3.6
1.1 ± 0.5
 watermilfoil, northern
(Myriophyllum sibiricum)
-
-
-
-
-
-
 waternymph, nodding 
(Najas flexilis) 
-
-
-
-
-
-
 waterweed, Canadian 
(Elodea canadensis) 
7.5 ± 4.2
 0.5 ± 0.3
-
-
10.0 ± 3.9
1.5 ± 0.6
 wildcelery
(Vallisneria americana) 
15.0 ± 5.7
2.1 ± 0.8
-
-
16.7 ± 4.9
2.3 ± 0.7

 all submersed species 
20.0 ± 6.4
2.8 ± 1.0
5.0 ± 3.5
0.5 ± 0.4
25.0 ± 5.6
3.7 ± 0.9
 
    Freq 
  Cover 
    Freq 
  Cover 
    Freq 
  Cover 
 lotus, American 
(Nelumbo lutea) 
-
-
-
-
-
-
 pond-lily, yellow
(Nuphar variegata)
-
-
-
-
-
-
 waterlily, white 
(Nymphaea odorata) 
-
-
-
-
3.3 ± 2.3
0.3 ± 0.2

 all rooted floating-leaf species 
-
-
-
-
3.3 ± 2.3
0.3 ± 0.2

Table 2.  Continued. 

Common name
(Scientific name) 
Pool 4, upper
n = 245
Pool 4, lower
n  = 355
Pool 4
n  = 630
Freq
Al
Freq 
Al
Freq 
Al
 bladderwort, common 
(Utricularia macrorhiza) 
-
-
-
-
0.3 ± 0.2
<0.1 ± <0.1
 buttercup, longbeak 
(Ranunculus longirostris) 
-
-
-
-
0.1 ± 0.1
<0.1 ± <0.1
 chara 
(Chara spp.) 
-
-
0.3 ± 0.3
<0.1 ± <0.1
0.2 ± 0.2
<0.1 ± <0.1
 coontail 
(Ceratophyllum demersum) 
1.9 ± 0.7
0.2 ± 0.1
 24.4 ± 2.3 
3.0 ± 0.3
 17.1 ± 1.3 
2.3 ± 0.2
 pondweed, curly 
(Potamogeton crispus) 
-
 -
10.5 ± 1.7
1.1 ± 0.2
6.8 ± 1.0
0.7± 0.1
 pondweed, flatstem 
(P. zosteriformis) 
-
-
7.3 ± 1.5
0.8 ± 0.2
4.4 ± 0.8
0.5 ± 0.1
 pondweed, horned 
(Zannichellia palustris)
-
-
0.3 ± 0.3
<0.1 ± <0.1
0.2 ± 0.2
<0.1 ± <0.1
 pondweed, leafy/small 
(Potamogeton foliosus/pusillus) 
0.5 ± 0.4
0.1 ± 0.1
13.0 ± 1.9
1.4 ± 0.2
8.9 ± 1.1
1.1 ± 0.1
 pondweed, longleaf 
(P. nodosus) 
0.3 ± 0.3
<0.1 ± <0.1
3.7 ± 1.1
0.4 ± 0.1
3.1 ± 0.7
0.4 ± 0.1
 pondweed, sago 
(P. pectinatus) 
  9.1 ± 2.2  
0.9 ± 0.2
8.6 ± 1.5
0.9 ± 0.2
11.2 ± 1.3
1.3 ± 0.1
 stargrass, water 
(Heteranthera dubia)
-
-
24.0 ± 2.4
2.7 ± 0.3
13.8 ± 1.3
1.5 ± 0.2
 watermilfoil, Eurasian 
(Myriophyllum spicatum)
-
-
19.2 ± 2.2
2.4 ± 0.3
10.3 ± 1.2
1.3 ± 0.2
 watermilfoil, northern
(Myriophyllum sibiricum)
-
-
0.3 ± 0.3
0.1 ± 0.1
0.3 ± 0.2
0.1 ± <0.1
 waternymph, nodding 
(Najas flexilis) 
0.3 ± 0.3
<0.1 ± <0.1
4.2 ± 1.0
0.5 ± 0.1
3.1 ± 0.6
0.3 ± 0.1
 waterweed, Canadian 
(Elodea canadensis) 
0.5 ± 0.4
0.1 ± 0.1
21.6 ± 2.3
2.7 ± 0.3
13.3 ± 1.3
1.6 ± 0.2
 wildcelery
(Vallisneria americana) 
-
-
28.6 ± 2.5
4.1 ± 0.4
15.4 ± 1.3
2.2 ± 0.2

 all submersed species 
9.7 ± 2.2
1.1 ± 0.2
50.9 ± 2.5
7.7± 0.4
35.0 ± 1.7
5.4 ± 0.3
 
    Freq 
  Cover 
    Freq 
  Cover 
    Freq 
  Cover 
 lotus, American 
(Nelumbo lutea) 
-
-
3.1 ± 1.0
0.3 ± 0.1
1.7 ± 0.5
0.2 ± 0.1
 pond-lily, yellow
(Nuphar variegata)
-
-
0.3 ± 0.3
<0.1 ± <0.1
0.2 ± 0.2
<0.1 ± <0.1
 waterlily, white 
(Nymphaea odorata) 
1.3 ± 0.6
0.2 ± 0.1
12.5 ± 1.9
1.6 ± 0.4
9.3 ± 1.1
1.2 ± 0.2

 all rooted floating-leaf species 
1.3 ± 0.6
0.2 ± 0.1
13.9 ± 1.9
1.8 ± 0.4
10.0 ± 1.1
1.3 ± 0.2

Page Last Modified: April 17, 2018