Upper Midwest Environmental Sciences Center

Table 1. Sample sites
Vegetation Update Title Page
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Table 1.  Number of random sites sampled for aquatic vegetation by study reach and aquatic strata. A dash (–) indicates the stratum was not sampled.

Study reach
Year
Contiguous backwater, upper
Contiguous backwater, lower
Isolated backwater
Lake Pepin, upper
Lake Pepin, lower
Main channel border, upper
Pool 4
1998
74
157
31
57
29
9
 
1999
75
160
34
65
35
12
 
2000
100
179
32
75
75
30
 
2001
100
176
50
75
75
30
 
2002
100
180
30
75
75
30
 
2003a
92
165
–
–
–
26
2004
102
181
32
77
77
31
2005
90
108
20
59
50
20
2006
90
110
11
60
50
20
2007
88
110
10
60
50
20
2008
90
110
20
60
50
20
  2009 89 110 20 60 50 20
  2010 90 109 19 60 50 20
  2011 90 110 19 60 50 20
  2012 90 110 20 60 50 20
  2013 90 110 20 59 50 20
  2014 89 109 19 60 50 20
aData were provided by the U.S. Fish and Wildlife Service and the Division of Fisheries, Minnesota Department of Natural Resources.

 

Study reach
Year
Main channel border, lower
Secondary channel, upper
Secondary channel, lower
Total
Pool 4, upper
Total Pool 4, lower
Total
Pool 4
Pool 4
1998
37
47
65
187
288
506
 
1999
48
61
59
213
302
549
 
2000
40
40
60
245
354
631
 
2001
40
40
60
245
351
646
 
2002
40
40
60
245
355
630
 
2003a
23
39
53
157
241
398
2004
41
41
61
251
360
643
2005
30
30
39
199
227
446
2006
30
30
40
200
230
441
2007
30
30
40
198
230
438
2008
30
30
40
200
230
450
  2009 30 30 40 199 230 449
  2010 30 30 40 200 229 448
  2011 30 30 40 200 230 449
  2012 30 30 40 200 230 450
  2013 30 30 40 199 230 449
  2014 30 30 40 199 229 447
aData were provided by the U.S. Fish and Wildlife Service and the Division of Fisheries, Minnesota Department of Natural Resources.

 

Study reach
Year
Contiguous backwater
Isolated backwater
Impounded
Main channel border
Secondary channel
Total
Pool 8
1998
172
28
170
53
93
516
 
1999
172
28
225
70
100
595
 
2000
175
30
225
99
120
649
 
2001
175
50
225
100
120
670
 
2002
174
26
224
100
120
644
 
2003
174
30
225
100
120
649
2004
175
29
225
100
120
649
2005
110
20
185
70
65
450
2006
108
16
185
70
65
444
2007
108
20
185
70
65
448
2008
110
17
185
70
65
447
  2009 110 18 184 70 65 447
  2010 108 19 182 70 65 444
  2011 110 19 183 70 65 447
  2012 110 20 185 70 65 450
  2013 110 20 185 70 65 450
  2014 110 19 185 69 65 448

 

Study reach
Year
Contiguous backwater
Isolated backwater
Impounded
Main channel border
Secondary channel
Total
Pool 13
1998
 169 27 209 62 62
529
 
1999
 170 29 210 70 70
549
 
2000
 198 27 210 70 70
575
 
2001
 198 52 209 70 70
599
 
2002
 200 29 209 70 70
578
 
2003
 200 29 210 70 70
579
2004
 219 31 236 79 79
644
2005
 118 24 175 80 50
447
2006 119 23 175 80 50
447
2007
 118 22 172 80 50
442
2008
 115 23 175 80 50
443
  2009 119 24 175 77 48
443
  2010 120 23 175 80 50
448
  2011 120 25 175 80 50
450
  2012 120 23 175 80 50
448
  2013 120 25 175 79 48 447
  2014 120 24 175 80 50 449

 

Study reach
Year
Contiguous backwater
Isolated backwater, Illinois River
Isolated backwater, Mississippi River
Impounded
Main channel border, Illinois River
Pool 26
1998
50
160
30
27
47
 
1999
80
160
50
80
50
 
2000
79
95
42
39
40
 
2001
80
94
60
40
40
 
2002
80
100
57
40
40
 
2003a
80
100
60
40
40
 
2004
110
132
58
56
56
aData were provided by the Illinois Natural History Survey based on a grant from the National Great Rivers Research and Education Center.

 

Study reach
Year
Main channel border, Mississippi River
Secondary channel
Total
Pool 26, Mississippi River
Total lower Alton Pool, Illinois River
Total Pool 26 and Alton Pool combined
Pool 26
1998
121
84
312
207
519
 
1999
137
90
437
210
647
 
2000
47
50
257
135
392
 
2001
49
50
279
134
413
 
2002
50
50
277
140
417
 
2003a
50
50
280
140
420
 
2004
69
69
362
188
550
aData were provided by the Illinois Natural History Survey based on a grant from the National Great Rivers Research and Education Center.

 

Study reach
Year
Contiguous backwater
Isolated backwater
Lakesa
Main channel border
Secondary channel
Total
La Grange Pool

1998

173

179

–

83

29

464
 
1999
190
188
–
120
40
538
 
2000
100
138
57
80
50
425
 
2001
100
129
57
78
50
414
 
2002
100
139
59
80
50
428
 
2003a
100
117
60
80
50
407
 
2004
128
175
74
103
65
545
aThe lakes stratum was added to the sampling in 2000.
bData were provided by the Illinois Natural History Survey based on a grant from the Illinois Department of Natural Resources.


 

Content manager: Danelle Larson


Page Last Modified: April 17, 2018