Upper Midwest Environmental Sciences Center

Table 4.  Percent frequency, abundance index (AI), cover, and standard errors of submersed and rooted floating–leaf vegetation in Pool 7, Upper Mississippi River System, 2002
Vegetation - Stratified Random Sampling 2002

Table 4.  Percent frequency, abundance index (AI), cover, and standard errors of submersed and rooted floating-leaf vegetation in Pool 7, Upper Mississippi River System, 2002.

Common name
(Scientific name)
 Contiguous 
backwater
n = 102		 Impounded
n = 171
Freq
AI
Freq
AI
 bladderwort, common (Utricularia macrorhiza)
3.9 ± 1.9
0.3 ± 0.2
-
-
 buttercup 
(Ranunculus spp.)
-
-
0.6 ± 0.6
<0.1 ± <0.1
 chara 
(Chara spp.) 
 10.8 ± 3.1 
1.2 ± 0.4
2.3 ± 1.2
0.3 ± 0.2
 coontail
(Ceratophyllum demersum) 
86.3 ± 3.4
15.8 ± 0.9
 26.3 ± 3.4 
4.0 ± 0.6
 pondweed, curly
(Potamogeton crispus) 
10.8 ± 3.1
0.9 ± 0.3
2.3 ± 1.2
0.2 ± 0.1 
 pondweed, flatstem
(P. zosteriformis) 
54.9 ± 5.0 
7.6 ± 0.8
14.0 ± 2.7
1.3 ± 0.3
 pondweed, leafy/small  (Potamogeton foliosus/pusillus) 
 30.4 ± 4.6
3.1 ± 0.5
10.5 ± 2.4
1.1 ± 0.3
 pondweed, longleaf
(P. nodosus) 
9.8 ± 3.0
1.0 ± 0.3
1.2 ± 0.8
0.1 ± 0.1
 pondweed, Richardson's 
(P. richardsonii) 
3.9 ± 1.9
0.3 ± 0.2
11.7 ± 2.5
1.0 ± 0.2
 pondweed, sago 
(P. pectinatus) 
3.9 ± 1.9
0.5 ± 0.2
8.2 ± 2.1
0.7 ± 0.2
 stargrass, water 
(Heteranthera dubia) 
28.4 ± 4.5
3.0 ± 0.5
28.1 ± 3.4
3.5 ± 0.5
 watermilfoil, Eurasian 
(Myriophyllum spicatum) 
43.1 ± 4.9
5.6 ± 0.7
20.5 ± 3.1
2.4 ± 0.4
 waternymph, nodding
(Najas flexilis) 
12.7 ± 3.3
1.2 ± 0.3
5.3 ± 1.7
0.5 ± 0.2
 waterweed, Canadian
(Elodea canadensis) 
76.5 ± 4.2
12.0 ± 0.8
26.9 ± 3.4
3.5 ± 0.5
 wildcelery 
(Vallisneria americana) 
33.3 ± 4.7
3.8 ± 0.6
53.8 ± 3.8
11.3 ± 0.9
 
all submersed species 
90.2 ± 3.0
18.9 ± 0.9
60.2 ± 3.8
13.3 ± 0.9
 
Freq 
Cover 
Freq 
Cover 
 lotus, American
(Nelumbo lutea) 
18.6 ± 3.9
4.6 ± 1.4
7.0 ± 2.0
1.9 ± 0.7
 pond-lily, yellow 
(Nuphar variegata) 
1.0 ± 1.0
0.1 ± 0.1
-
-
 waterlily, white 
(Nymphaea odorata) 
23.5 ± 4.2
5.1 ± 1.3
8.2 ± 2.1
1.4 ± 0.5
 
all rooted floating-leaf species 
37.3 ± 4.8
9.2 ± 1.8
12.3 ± 2.5
3.0 ± 0.9

Table 4. Continued.
Common name
(Scientific name)		 Main channel 
border
n = 71		 Secondary 
channel
n = 48		 Pool 7 
n = 392
Freq 
AI 
Freq 
AI 
Freq 
AI 
 bladderwort, common 
(Utricularia macrorhiza)
-
-
-
-
0.6 ± 0.3
0.1 ± <0.1
 buttercup
(Ranunculus spp.)
-
-
-
-
0.4 ± 0.4
<0.1 ± <0.1
 chara 
(Chara spp.)
-
-
-
-
3.2 ± 0.9
0.4 ± 0.1
 coontail 
(Ceratophyllum demersum) 
1.4 ± 1.4
0.1 ± 0.1
 16.7 ± 5.4 
2.5 ± 0.9
 32.4 ± 2.4 
5.3 ± 0.4
 pondweed, curly 
(Potamogeton crispus) 
-
-
-
-
3.2 ± 0.9
0.3 ± 0.1
 pondweed, flatstem 
(P. zosteriformis)
-
-
12.5 ± 4.8
1.8 ± 0.7
19.0 ± 2.0
2.2 ± 0.2
 pondweed, leafy/small 
(Potamogeton foliosus/pusillus) 
-
-
-
-
11.6 ± 1.7
1.2 ± 0.2
 pondweed, longleaf 
(P. nodosus) 
-
-
2.1 ± 2.1
0.2 ± 0.2
2.5 ± 0.7
0.2 ± 0.1
 pondweed, Richardson's 
(P. richardsonii) 
-
-
-
-
8.5 ± 1.7
0.8 ± 0.2
 pondweed, sago 
(P. pectinatus) 
-
-
2.1 ± 2.1
0.1 ± 0.1
6.4 ± 1.5
0.6 ± 0.1
 stargrass, water 
(Heteranthera dubia) 
  4.2 ± 2.4  
0.4 ± 0.3
12.5 ± 4.8
2.2 ± 0.9
24.9 ± 2.5
3.1 ± 0.4
 watermilfoil, Eurasian 
(Myriophyllum spicatum) 
1.4 ± 1.4
0.1 ± 0.1
6.3 ± 3.5
0.7 ± 0.4
21.0 ± 2.3
2.5 ± 0.3
 waternymph, nodding 
(Najas flexilis) 
-
-
-
-
5.4 ± 1.3
0.5 ± 0.1
 waterweed, Canadian 
(Elodea canadensis) 
-
-
18.8 ± 5.7
2.6 ± 0.9
31.6 ± 2.5
4.4 ± 0.4
 wildcelery 
(Vallisneria americana) 
5.6 ± 2.8
0.8 ± 0.4
14.6 ± 5.1
2.0 ± 0.8
43.5 ± 2.8
8.5 ± 0.6

 all submersed species 
7.0 ± 3.1
0.9 ± 0.4
25.0 ± 6.3
4.7 ± 1.3
57.4 ± 2.7
12.4 ± 0.7
 
Freq 
Cover
Freq 
Cover 
Freq 
Cover 
 lotus, American 
(Nelumbo lutea) 
-
-
4.2 ± 2.9
3.8 ± 2.6
8.0 ± 1.5
2.4 ± 0.6
 pond-lily, yellow 
(Nuphar variegata) 
-
-
-
-
0.1 ± 0.1
<0.1 ± <0.1
 waterlily, white 
(Nymphaea odorata) 
-
-
2.1 ± 2.1
1.9 ± 1.9
9.2 ± 1.6
1.9 ± 0.4

 all rooted floating-leaf species 
-
-
6.3 ± 3.5
5.6 ± 3.2
14.4 ± 1.9
4.0 ± 0.7

Page Last Modified: April 17, 2018