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.
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