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Vegetation - Stratified Random Sampling 2002

Table 3.  Percent frequency, abundance index (AI), cover, and standard errors of submersed and rooted floating-leaf vegetation in Pool 5, Upper Mississippi River System, 2002.

Common name
(Scientific name)
 Contiguous 
backwater
n = 110		 Impounded
n = 173
Freq 
AI 
Freq 
AI 
 chara 
(Chara spp.) 
0.9 ± 0.9
0.1 ± 0.1
-
-
 coontail
(Ceratophyllum demersum) 
36.4 ± 4.6
5.6 ± 0.8
3.5 ± 1.4
0.2 ± 0.1
 pondweed, curly 
(Potamogeton crispus) 
8.2 ± 2.6
0.6 ± 0.2
2.3 ± 1.1
0.2 ± 0.1
 pondweed, flatstem 
(P. zosteriformis) 
10.9 ± 3.0
1.1 ± 0.3
-
-
 pondweed, horned 
(Zannichellia palustris) 
-
-
0.6 ± 0.6
0.1 ± 0.1
 pondweed, leafy/small  (Potamogeton foliosus/pusillus) 
 18.2 ± 3.7 
2.2 ± 0.5
1.7 ± 1.0
0.2 ± 0.1
 pondweed, longleaf 
(P. nodosus) 
10.0 ± 2.9
1.1 ± 0.3
0.6 ± 0.6
0.1 ± 0.1
 pondweed, Richardson's 
(P. richardsonii) 
0.9 ± 0.9
0.1 ± 0.1
-
-
 pondweed, sago 
(P. pectinatus) 
6.4 ± 2.3
0.8 ± 0.3
13.3 ± 2.6
1.4 ± 0.3
 stargrass, water 
(Heteranthera dubia) 
10.9 ± 3.0
1.2 ± 0.4
 10.4 ± 2.3 
1.0 ± 0.3
 watermilfoil, Eurasian 
(Myriophyllum spicatum) 
28.2 ± 4.3
3.2 ± 0.5
5.2 ± 1.7
0.5 ± 0.2
 waternymph, nodding 
(Najas flexilis) 
1.8 ± 1.3
0.2 ± 0.2
-
-
 waterweed, Canadian
(Elodea canadensis) 
26.4 ± 4.2
3.1 ± 0.5
6.9 ± 1.9
0.7 ± 0.2
 wildcelery 
(Vallisneria americana) 
10.0 ± 2.9
1.1 ± 0.3
9.8 ± 2.3
1.7 ± 0.4
 
all submersed species 
51.8 ± 4.8
8.6 ± 0.9
27.2 ± 3.4
3.6 ± 0.5
 
Freq 
Cover 
Freq 
Cover 
 lotus, American 
(Nelumbo lutea) 
10.0 ± 2.9
2.8 ± 1.2
3.5 ± 1.4
0.9 ± 0.6
 pond-lily, yellow 
(Nuphar variegata) 
1.8 ± 1.3
0.4 ± 0.3
-
-
 waterlily, white 
(Nymphaea odorata) 
32.7 ± 4.5
7.6 ± 1.7
2.9 ± 1.3
0.9 ± 0.5
 
all rooted floating-leaf species 
40.0 ± 4.7
10.7 ± 2.0
5.2 ± 1.7
1.7 ± 0.7

Table 3. Continued.
Common name
(Scientific name)		 Main channel 
border
n = 71		 Secondary 
channel
n = 50		 Pool 5
n = 404
Freq 
AI 
Freq 
AI 
Freq 
AI 
chara 
(Chara spp.) 
-
-
-
-
0.2 ± 0.2
<0.1 ± <0.1
 coontail 
(Ceratophyllum demersum) 
  2.8 ± 2.0 
0.2 ± 0.1
 12.0 ± 4.6 
1.0 ± 0.4
12.0± 1.5
1.6 ± 0.2
 pondweed, curly 
(Potamogeton crispus) 
1.4 ± 1.4
0.1 ± 0.1
2.0 ± 2.0
0.1 ± 0.1
3.7 ± 1.0
0.3 ± 0.1
 pondweed, flatstem 
(P. zosteriformis) 
-
-
-
-
2.7 ± 0.7
0.3 ± 0.1
 pondweed, horned 
(Zannichellia palustris) 
-
-
-
-
0.4 ± 0.4
0.1 ± 0.1
 pondweed, leafy/small 
(Potamogeton foliosus/pusillus) 
1.4 ± 1.4
0.1 ± 0.1
2.0 ± 2.0
0.2 ± 0.2
5.7 ± 1.1
0.7 ± 0.1
 pondweed, longleaf 
(P. nodosus) 
-
-
-
-
2.8 ± 0.8
0.3 ± 0.1
 pondweed, Richardson's 
(P. richardsonii) 
-
-
-
-
0.2 ± 0.2
<0.1 ± <0.1
 pondweed, sago 
(P. pectinatus) 
4.2 ± 2.4
0.5 ± 0.3
2.0 ± 2.0
0.1 ± 0.1
 10.3 ± 1.7 
1.1 ± 0.2
 stargrass, water 
(Heteranthera dubia) 
5.6 ± 2.8
0.4 ± 0.2
4.0 ± 2.8
0.4 ± 0.3
9.8 ± 1.6
1.0 ± 0.2
 watermilfoil, Eurasian 
(Myriophyllum spicatum) 
-
-
6.0 ± 3.4
0.7 ± 0.4
10.5 ± 1.5
1.1 ± 0.2
 waternymph, nodding 
(Najas flexilis) 
-
-
-
-
0.4 ± 0.3
0.1 ± <0.1
 waterweed, Canadian 
(Elodea canadensis) 
7.0 ± 3.1
0.5 ± 0.2
2.0 ± 2.0
0.1 ± 0.1
11.4 ± 1.6
1.2 ± 0.2
 wildcelery 
(Vallisneria americana) 
5.6 ± 2.8
0.7 ± 0.4
2.0 ± 2.0
0.2 ± 0.2
9.1 ± 1.6
1.4 ± 0.3

 all submersed species 
15.5 ± 4.3
1.7 ± 0.5
14.0 ± 5.0
1.7 ± 0.6
31.6 ± 2.5
4.6 ± 0.4
 
Freq 
Cover
Freq 
Cover 
Freq 
Cover 
 lotus, American 
(Nelumbo lutea) 
-
-
-
-
4.6 ± 1.1
1.3 ± 0.5
 pond-lily, yellow 
(Nuphar variegata) 
-
-
-
-
0.4 ± 0.3
0.1 ± 0.1
 waterlily, white 
(Nymphaea odorata) 
-
-
4.0 ± 2.8
0.4 ± 0.3
10.0 ± 1.4
2.4 ± 0.5

 all rooted floating-leaf species 
-
-
4.0 ± 2.8
0.4 ± 0.3
13.2 ± 1.6
3.7 ± 0.7

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