Upper Midwest Environmental Sciences Center

Table 6.  Percent frequency, abundance index (AI), cover, and standard errors of submersed and rooted floating–leaf vegetation in Pool 8, Upper Mississippi River System, 2002.
Vegetation - Stratified Random Sampling 2002

Table 6.  Percent frequency, abundance index (AI), cover, and standard errors of submersed and rooted floating-leaf vegetation in Pool 12, Upper Mississippi River System, 2002.

Common name 
(Scientific name)		 Contiguous
backwater
n = 120		 Impounded
n = 81
Freq
AI
Freq
AI
 coontail  
(Ceratophyllum demersum) 
  25.8 ± 4.0 
3.2 ± 0.6
 14.8 ± 4.0 
1.4 ± 0.4
 pondweed, curly 
(Potamogeton crispus) 
0.8 ± 0.8
0.1 ± 0.1
2.5 ± 1.7
0.3 ± 0.2
 pondweed, leafy/small 
(Potamogeton foliosus/pusillus) 
0.8 ± 0.8
0.1 ± 0.1
3.7 ± 2.1
0.3 ± 0.1
 pondweed, longleaf 
(P. nodosus) 
6.7 ± 2.3
0.7 ± 0.3
14.8 ± 4.0
2.1 ± 0.7
 pondweed, sago 
(P. pectinatus) 
10.8 ± 2.8
1.1 ± 0.3
11.1 ± 3.5
1.4 ± 0.5
 stargrass, water 
(Heteranthera dubia) 
5.0 ± 2.0
0.4 ± 0.2
16.0 ± 4.1
2.3 ± 0.7
 watermilfoil, Eurasian 
(Myriophyllum spicatum) 
5.0 ± 2.0
0.5 ± 0.2
8.6 ± 3.1
1.1 ± 0.4
 waternymph, nodding 
(Najas flexilis) 
0.8 ± 0.8
0.2 ± 0.2
-
-
 waterweed, Canadian 
(Elodea canadensis) 
0.8 ± 0.8
0.1 ± 0.1
2.5 ± 1.7
0.2 ± 0.1
 wildcelery 
(Vallisneria americana) 
-
-
7.4 ± 2.9
1.5 ± 0.6
 
all submersed species 
33.3 ± 4.3
4.6 ± 0.7
27.2 ± 5.0
5.2 ± 1.2
 
Freq
Cover
Freq
Cover
 lotus, American 
(Nelumbo lutea) 
30.0 ± 4.2
17.2 ± 2.9
29.6 ± 5.1
22.2 ± 4.1
 waterlily, white 
(Nymphaea odorata) 
10.8 ± 2.8
3.3 ± 1.2
2.5 ± 1.7
0.5 ± 0.4
 
all rooted floating-leaf species 
35.0 ± 4.4
20.5 ± 3.2
30.9 ± 5.2
22.8 ± 4.1

Table 6. Continued.
Common name
(Scientific name)		 Main channel 
border
n = 153		 Secondary 
channel
n = 50		 Pool 12
n = 404
Freq 
AI 
Freq 
AI 
Freq 
AI 
 coontail 
(Ceratophyllum demersum) 
   0.7 ± 0.7 
<0.1 ± <0.1
   2.0 ± 2.0 
0.1 ± 0.1
   9.2 ± 1.3 
1.0 ± 0.2
 pondweed, curly 
(Potamogeton crispus) 
-
-
-
-
0.6 ± 0.3
0.1 ± <0.1
 pondweed, leafy/small 
(Potamogeton foliosus/pusillus) 
-
-
-
-
0.8 ± 0.4
0.1 ± <0.1
 pondweed, longleaf 
(P. nodosus) 
-
-
-
-
3.9 ± 0.8
0.4 ± 0.1
 pondweed, sago 
(P. pectinatus) 
2.6 ± 1.3
0.2 ± 0.1
6.0 ± 3.4
0.5 ± 0.3
6.7 ± 1.3
0.7 ± 0.1
 stargrass, water 
(Heteranthera dubia) 
2.0 ± 1.1
0.2 ± 0.1
-
-
4.4 ± 0.9
0.5 ± 0.1
 watermilfoil, Eurasian 
(Myriophyllum spicatum) 
0.7 ± 0.7
0.1 ± 0.1
-
-
2.8 ± 0.7
0.3 ± 0.1
 waternymph, nodding 
(Najas flexilis) 
-
-
-
-
0.2 ± 0.2
<0.1 ± <0.1
 waterweed, Canadian 
(Elodea canadensis) 
-
-
2.0 ± 2.0
0.1 ± 0.1
1.1 ± 0.6
0.1 ± <0.1
 wildcelery 
(Vallisneria americana) 
1.3 ± 0.9
0.2 ± 0.1
-
-
1.7 ± 0.6
0.3 ± 0.1

 all submersed species 
3.3 ± 1.4
0.5 ± 0.2
8.0 ± 3.9
0.6 ± 0.3
15.2 ± 1.7
2.2 ± 0.3
 
Freq 
Cover
Freq 
Cover 
Freq 
Cover 
 lotus, American 
(Nelumbo lutea) 
-
-
-
-
11.8 ± 1.3
7.6 ± 0.9
 waterlily, white 
(Nymphaea odorata) 
-
-
-
-
3.0 ± 0.7
0.8 ± 0.3

 all rooted floating-leaf species 
-
-
-
-
13.1 ± 1.3
8.4 ± 1.0

Page Last Modified: April 17, 2018