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, 1999.

Vegetation - Stratified Random Sampling
1999 Results

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, 1999.

Common name
(Scientific name)
 Contiguous
backwater, upper
n = 75 		Contiguous
backwater, lower
n = 160 		Isolated
backwater
n = 32
Freq
AI
Freq
AI
Freq
AI
bladderwort, common (Utricularia macrorhiza)
-
-
0.6 � 0.6
<0.1 � <0.1
-
-
buttercup, longbeak (Ranunculus longirostris)
-
-
-
-
3.1 � 3.1
0.4 � 0.4
coontail
(Ceratophyllum demersum)
4.0 � 2.3
0.6 � 0.3
38.8 � 3.9
5.2 � 0.6
68.8 � 8.3
14.0 � 2.5
pondweed, curly (Potamogeton crispus)
1.3 � 1.3
0.1 � 0.1
15.6 � 2.9
1.8 � 0.4
12.5 � 5.9
1.2 � 0.6
pondweed, flatstem (P. zosteriformis)
-
-
10.0 � 2.4
1.0 � 0.2
12.5 � 5.9
1.7 � 0.9
pondweed, horned (Zannichellia palustris)
-
-
1.3 � 0.9
0.2 � 0.1
-
-
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
16.9 � 3.0
1.9 � 0.4
46.9 � 9.0
6.4 � 1.3
pondweed, longleaf (P. nodosus)
1.3 � 1.3
0.2 � 0.2
7.5 � 2.1
0.9 � 0.3
9.4 � 5.2
1.0 � 0.6
pondweed, ribbonleaf (P. epihydrus)
-
-
-
-
-
-
pondweed, sago (P. pectinatus)
26.7 � 5.1
3.2 � 0.7
10.0 � 2.4
1.4 � 0.4
75.0 � 7.8
11.0 � 1.4
stargrass, water (Heteranthera dubia)
-
-
32.5 � 3.7
3.9 � 0.5
3.1 � 3.1
0.2 � 0.2
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
26.3 � 3.5
3.0 � 0.4
-
-
waternymph, nodding (Najas flexilis)
-
-
4.4 � 1.6
0.5 � 0.2
15.6 � 6.5
1.7 � 0.8
waterweed, Canadian (Elodea canadensis)
1.3 � 1.3
0.1 � 0.1
40.0 � 3.9
5.3 � 0.6
21.9 � 7.4
2.8 � 1.0
wildcelery (Vallisneria americana)
-
-
30.6 � 3.7
4.1 � 0.5
-
-
all submersed species
29.3 � 5.3
3.3 � 0.6
66.3 � 3.8
10.8 � 0.7
81.3 � 7.0
16.8 � 2.3
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American (Nelumbo lutea)
-
-
5.6 � 1.8
0.9 � 0.4
-
-
waterlily, white (Nymphaea odorata)
5.3 � 2.6
1.1 � 0.6
18.8 � 3.1
3.8 � 0.9
34.4 � 8.5
4.1 � 1.2
all rooted floating-leaf species
5.3 � 2.6
1.1 � 0.6
21.9 � 3.3
4.4 � 1.0
34.4 � 8.5
4.1 � 1.2

Table 2. Continued.

Common name
(Scientific name)
Lake Pepin,
upper
n = 65
Lake Pepin, lower
n = 35
Main channel border,
upper
n = 12
Freq
AI
Freq
AI
Freq
AI
bladderwort, common (Utricularia macrorhiza)
-
-
-
-
-
-
buttercup, longbeak (Ranunculus longirostris)
-
-
-
-
-
-
coontail (Ceratophyllum demersum)
-
-
2.9 � 2.9
0.3 � 0.3
-
-
pondweed, curly (Potamogeton crispus)
-
-
-
-
-
-
pondweed, flatstem (P. zosteriformis)
-
-
-
-
-
-
pondweed, horned (Zannichellia palustris)
-
-
-
-
-
-
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
8.6 � 4.8
0.6 � 0.3
-
-
pondweed, longleaf (P. nodosus)
-
-
-
-
-
-
pondweed, ribbonleaf (P. epihydrus)
-
-
-
-
-
-
pondweed, sago (P. pectinatus)
16.9 � 4.7
2.3 � 0.7
2.9 � 2.9
0.3 � 0.3
16.7 � 11.2
1.1 � 0.8
stargrass, water (Heteranthera dubia)
-
-
2.9 � 2.9
0.2 � 0.2
-
-
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
-
-
-
-
waternymph, nodding (Najas flexilis)
-
-
8.6 � 4.8
1.5 � 0.8
-
-
waterweed, Canadian (Elodea canadensis)
-
-
8.6 � 4.8
1.2 � 0.7
-
-
wildcelery (Vallisneria americana)
-
-
5.7 � 4.0
0.7 � 0.5
-
-
all submersed species
16.9 � 4.7
2.2 � 0.6
8.6 � 4.8
1.6 � 0.9
16.7 � 11.2
1.0 � 0.7
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American (Nelumbo lutea)
-
-
-
-
-
-
waterlily, white (Nymphaea odorata)
-
-
-
-
-
-
all rooted floating-leaf species
-
-
-
-
-
-

Table 2. Continued.

Common name
(Scientific name)
Main channel border, lower
n = 48
Secondary
channel, upper
n = 61
Secondary
channel, lower
n = 59
Freq
AI
Freq
AI
Freq
AI
bladderwort, common
(Utricularia macrorhiza)
-
-
-
-
-
-
buttercup, longbeak (Ranunculus longirostris)
-
-
-
-
-
-
coontail (Ceratophyllum demersum)
2.1 � 2.1
0.1 � 0.1
-
-
20.3 � 5.3
1.6 � 0.4
pondweed, curly (Potamogeton crispus)
2.1 � 2.1
0.1 � 0.1
-
-
11.9 � 4.2
1.4 � 0.5
pondweed, flatstem (P. zosteriformis)
-
-
-
-
-
-
pondweed, horned (Zannichellia palustris)
6.3 � 3.5
0.7 � 0.4
-
-
1.7 � 1.7
0.3 � 0.3
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
-
-
5.1 � 2.9
0.3 � 0.2
pondweed, longleaf (P. nodosus)
-
-
-
-
8.5 � 3.7
1.2 � 0.6
pondweed, ribbonleaf (P. epihydrus)
-
-
-
-
1.7 � 1.7
0.2 � 0.2
pondweed, sago (P. pectinatus)
10.4 � 4.5
1.4 � 0.7
-
-
18.6 � 5.1
2.4 � 0.7
stargrass, water (Heteranthera dubia)
10.4 � 4.5
0.9 � 0.4
-
-
10.2 � 4.0
1.1 � 0.5
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
-
-
8.5 � 3.7
0.8 � 0.4
waternymph, nodding (Najas flexilis)
-
-
-
-
-
-
waterweed, Canadian (Elodea canadensis)
4.2 � 2.9
0.3 � 0.2
-
-
18.6 � 5.1
2.0 � 0.6
wildcelery (Vallisneria americana)
10.4 � 4.5
1.3 � 0.6
-
-
20.3 � 5.3
2.8 � 0.8
all submersed species
20.8 � 5.9
2.4 � 0.8
-
-
37.3 � 6.3
5.2 � 1.0
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American (Nelumbo lutea)
-
-
-
-
-
-
waterlily, white (Nymphaea odorata)
-
-
-
-
1.7 � 1.7
0.8 � 0.8
all rooted floating-leaf species
-
-
-
-
1.7 � 1.7
0.8 � 0.8

Table 2. Continued.

Common name
(Scientific name)
Pool 4, upper
n = 213
Pool 4, lower
n = 302
Pool 4
n = 547
Freq
AI
Freq
AI
Freq
AI
bladderwort, common
(Utricularia macrorhiza)
-
-
0.4 � 0.6
<0.1 � <0.1
0.2 � 0.5
<0.1 � <0.1
buttercup, longbeak (Ranunculus longirostris)
-
-
-
-
0.1 � 0.3
<0.1 � <0.1
coontail (Ceratophyllum demersum)
1.1 � 0.9
0.1 � 0.1
27.2 � 3.8
3.5 � 0.6
18.0 � 3.1
2.6 � 0.5
pondweed, curly (Potamogeton crispus)
0.4 � 0.5
<0.1 � 0.1
11.3 � 2.8
1.3 � 0.4
6.8 � 2.3
0.8 � 0.3
pondweed, flatstem (P. zosteriformis)
-
-
6.2 � 2.2
0.6 � 0.2
3.9 � 1.8
0.4 � 0.2
pondweed, horned (Zannichellia palustris)
-
-
1.5 � 1.0
0.2 � 0.1
0.8 � 0.8
0.1 � 0.1
pondweed, leafy/small (Potamogeton foliosus/pusillus)
-
-
12.6 � 3.1
1.3 � 0.4
8.8 � 2.6
1.0 � 0.3
pondweed, longleaf (P. nodosus)
0.4 � 0.5
0.1 � 0.1
5.7 � 2.1
0.7 � 0.3
3.6 � 1.7
0.4 � 0.2
pondweed, ribbonleaf (P. epihydrus)
-
-
0.2 � 0.3
<0.1 � <0.1
0.1 � 0.2
<0.1 � <0.1
pondweed, sago (P. pectinatus)
17.8 � 4.7
2.3 � 0.7
9.8 � 2.6
1.3 � 0.4
16.0 � 3.6
2.1 � 0.5
stargrass, water (Heteranthera dubia)
-
-
22.8 � 3.7
2.7 � 0.5
12.4 � 2.9
1.5 � 0.4
watermilfoil, Eurasian (Myriophyllum spicatum)
-
-
17.3 � 3.3
1.9 � 0.4
9.3 � 2.6
1.0 � 0.3
waternymph, nodding (Najas flexilis)
-
-
4.2 � 2.0
0.5 � 0.3
2.9 � 1.7
0.4 � 0.2
waterweed, Canadian (Elodea canadensis)
0.4 � 0.5
<0.1 � <0.1
28.9 � 4.0
3.7 � 0.6
16.6 � 3.2
2.1 � 0.5
wildcelery (Vallisneria americana)
-
-
23.3 � 3.8
3.1 � 0.6
12.5 � 2.9
1.7 � 0.4
all submersed species
18.5 � 4.8
2.2 � 0.6
48.9 � 4.0
7.8 � 0.8
37.6 � 4.3
5.8 � 0.7
 
Freq
Cover
Freq
Cover
Freq
Cover
lotus, American
(Nelumbo lutea)
-
-
3.5 � 1.7
0.6 � 0.4
1.9 � 1.3
0.3 � 0.3
waterlily, white
(Nymphaea odorata)
1.4 � 1.0
0.3 � 0.2
11.9 � 2.9
2.4 � 0.9
8.5 � 2.5
1.6 � 0.7
all rooted floating-leaf species
1.4 � 1.0
0.3 � 0.2
13.8 � 3.1
2.9 � 0.9
9.5 � 2.6
1.8 � 0.8

 

May 28, 2002
Page Last Modified: April 17, 2018