Upper Midwest Environmental Sciences Center

Table 7.  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 7.  Percent frequency,  abundance index (AI), cover, and standard errors of submersed and rooted floating–leaf vegetation in Pool 13, Upper Mississippi River System, 2002.

Common name
(Scientific name)		 Contiguous 
backwater
n =200		 Isolated 
backwater
n = 30		 Impounded
n = 209
Freq 
AI 
Freq 
AI 
Freq 
AI 
 chara 
(Chara spp.) 
  1.0 ± 0.7 
0.1 ± 0.1
-
-
0.5 ± 0.5
0.1 ± 0.1
 coontail 
(Ceratophyllum demersum) 
42.0 ± 3.5
8.5 ± 0.8
50.0 ± 9.3
7.3 ± 1.6
 14.4 ± 2.4 
2.4 ± 0.6
 pondweed, curly 
(Potamogeton crispus) 
17.5 ± 2.7
2.5 ± 0.5
16.7 ± 6.9
1.9 ± 0.9
4.3 ± 1.4
0.6 ± 0.2
 pondweed, flatstem 
(P. zosteriformis) 
1.5 ± 0.9
 0.1 ± 0.1
-
-
-
-
 pondweed, horned 
(Zannichellia palustris) 
2.0 ± 1.0
0.3 ± 0.2
-
-
-
-
 pondweed, leafy/small 
(Potamogeton foliosus/pusillus) 
20.0 ± 2.8
2.6 ± 0.4
13.3 ± 6.3
1.2 ± 0.6
1.9 ± 1.0
0.2 ± 0.1
 pondweed, longleaf 
(P. nodosus) 
7.0 ± 1.8
0.8 ± 0.2
-
-
3.8 ± 1.3
0.3 ± 0.1
 pondweed, sago 
(P. pectinatus) 
31.0 ± 3.3
4.4 ± 0.5
50.0 ± 9.3
7.4 ± 1.4
18.2 ± 2.7
2.6 ± 0.4
 stargrass, water 
(Heteranthera dubia) 
10.0 ± 2.1
1.0 ± 0.2
-
-
13.4 ± 2.4
1.5 ± 0.3
 watermilfoil, Eurasian 
(Myriophyllum spicatum) 
23.0 ± 3.0
2.9 ± 0.4
3.3 ± 3.3
0.2 ± 0.2
12.9 ± 2.3
1.8 ± 0.4
 waternymph, nodding 
(Najas flexilis) 
16.5 ± 2.6
2.6 ± 0.5
-
-
1.0 ± 0.7
0.1 ± 0.1
 waternymph, southern
(N. guadalupensis)
3.0 ± 1.2
0.3 ± 0.1
3.3 ± 3.3
0.2 ± 0.2
1.9 ± 1.0
0.3 ± 0.2
 waterweed, Canadian 
(Elodea canadensis) 
12.5 ± 2.3
2.0 ± 0.5
6.7 ± 4.6
0.6 ± 0.4
5.7 ± 1.6
0.9 ± 0.3
 wildcelery 
(Vallisneria americana) 
3.5 ± 1.3
0.6 ± 0.3
-
-
33.5 ± 3.3
9.4 ± 1.1

 all submersed species
51.5 ± 3.5
12.0 ± 1.1
66.7 ± 8.8
11.6 ± 1.7
44.5 ± 3.4
12.7 ± 1.2
 
 Freq
Cover
Freq
 Cover 
 Freq 
 Cover 
 lotus, American 
(Nelumbo lutea) 
40.0 ± 3.5
11.3 ± 1.6
26.7 ± 8.2 
2.7 ± 0.8
12.4 ± 2.3
5.5 ± 1.3
 waterlily, white 
(Nymphaea odorata) 
7.5 ± 1.9
1.4 ± 0.5
10.0 ± 5.6
1.0 ± 0.6
5.3 ± 1.5
1.3 ± 0.5

 all rooted floating-leaf species 
42.0 ± 3.5
12.3 ± 1.6
33.3 ± 8.8
3.3 ± 0.9
14.8 ± 2.5
6.5 ± 1.4

Table 7. Continued.
Common name
(Scientific name)		 Main channel 
border
n = 70		 Secondary 
channel
n = 70		 Pool 13 
n = 579
Freq 
AI 
Freq 
AI 
Freq 
AI 
 chara 
(Chara spp.) 
-
-
-
-
0.6 ± 0.3
0.1 ± <0.1
 coontail 
(Ceratophyllum demersum) 
-
-
4.3 ± 2.4
0.4 ± 0.2
 24.5 ± 1.7 
4.5 ± 0.4
 pondweed, curly 
(Potamogeton crispus)
-
-
-
-
9.1 ± 1.2
1.2 ± 0.2
  pondweed, flatstem 
(P. zosteriformis) 
-
-
-
-
0.5 ± 0.3
0.1 ± <0.1
 pondweed, horned 
(Zannichellia palustris) 
-
-
-
-
0.7 ± 0.4
0.1 ± 0.1
 pondweed, leafy/small 
(Potamogeton foliosus/pusillus) 
-
-
-
-
8.7 ± 1.2
1.1 ± 0.2
 pondweed, longleaf 
(P. nodosus)
-
-
2.9 ± 2.0
0.4 ± 0.3
4.4 ± 0.9
0.4 ± 0.1
  pondweed, sago 
(P. pectinatus)
  7.1 ± 3.1 
1.0 ± 0.5
  4.3 ± 2.4 
0.6 ± 0.3
22.8 ± 1.8
3.2 ± 0.3
 stargrass, water 
(Heteranthera dubia)
1.4 ± 1.4
0.1 ± 0.1
-
-
9.5 ± 1.3
1.0 ± 0.2
  watermilfoil, Eurasian 
(Myriophyllum spicatum) 
1.4 ± 1.4
0.2 ± 0.2
-
-
14.1 ± 1.5
1.8 ± 0.2
  waternymph, nodding 
(Najas flexilis) 
-
-
-
-
6.3 ± 1.0
1.0 ± 0.2
 waternymph, southern
(N. guadalupensis)
-
-
-
-
2.1 ± 0.6
0.3 ± 0.1
 waterweed, Canadian 
(Elodea canadensis) 
1.4 ± 1.4
0.1 ± 0.1
-
-
7.5 ± 1.1
1.2 ± 0.2
 wildcelery 
(Vallisneria americana) 
1.4 ± 1.4
0.2 ± 0.2
1.4 ± 1.4
0.1 ± 0.1
16.2 ± 1.5
4.4 ± 0.5

 all submersed species 
7.1 ± 3.1
1.0 ± 0.5
10.0 ± 3.6
1.1 ± 0.4
43.0 ± 2.1
10.7 ± 0.7
 
Freq 
Cover
Freq 
Cover 
Freq 
Cover 
 lotus, American 
(Nelumbo lutea) 
-
-
1.4 ± 1.4
1.0 ± 1.0
21.3 ± 1.7
6.6 ± 0.8
 waterlily, white 
(Nymphaea odorata) 
-
-
-
-
5.6 ± 1.0
1.1 ± 0.3

 all rooted floating-leaf species 
-
-
1.4 ± 1.4
1.0 ± 1.0
23.5 ± 1.7
7.5 ± 0.8

Page Last Modified: April 17, 2018