Upper Midwest Environmental Sciences Center
Tables
Table 2. Percent frequency of occurrence and abundance index or percent cover of submersed, rooted, floating–leaf, and emergent vegetation by year and study reach, weighted by the areas of the aquatic strata (n = number of sites, Frq = percent frequency of occurrence, SE = standard error, AI = abundance index, Cov = percent cover). In 1998, sites were selected from depths less than or equal to 3 m. After 1998, the criteria was changed to less than or equal to 2.5 m; therefore, any sites between 2.5 and 3 m were dropped from the 1998 analysis for comparison purposes.
Pool 4 |
Year |
Submersed aquatic vegetation |
Rooted, floating-leaf vegetation |
Emergent vegetation |
|||||||||
n |
Frq |
± SE |
AI |
± SE |
Frq |
± SE |
Cov |
± SE |
Frq |
± SE |
Cov |
± SE |
|
506 |
1998 |
39.3 |
2.2 |
7.6 |
0.6 |
16.2 |
1.6 |
5.9 | 0.8 | 10.5 |
1.4 |
3.4 | 0.6 |
549 |
1999 |
37.3 |
2.1 |
5.9 |
0.4 |
12.1 |
1.4 |
2.2 | 0.4 | 8.3 |
1.2 |
2.6 | 0.5 |
631 |
2000 |
39.1 |
2.0 |
6.5 |
0.4 |
11.8 |
1.3 |
2.1 | 0.4 | 8.4 |
1.1 |
2.7 | 0.5 |
646 |
2001 |
36.9 |
1.9 |
6.0 |
0.4 |
9.7 |
1.2 |
1.5 | 0.3 | 8.7 |
1.1 |
2.9 | 0.5 |
630 |
2002 |
35.0 |
1.9 |
5.4 |
0.3 |
12.2 |
1.3 |
1.5 | 0.2 | 10.1 |
1.2 |
3.7 | 0.6 |
– |
2003a |
– |
– |
– |
– |
– |
– |
– | – | – |
– |
– | – |
643 |
2004 |
30.9 |
1.8 |
5.3 |
0.4 |
12.0 |
1.3 |
2.2 | 0.4 | 12.1 |
1.3 |
6.0 | 0.8 |
446 |
2005 |
37.3 |
2.3 |
10.1 |
0.8 |
16.1 |
1.8 |
3.6 | 0.6 | 8.9 |
1.4 |
3.5 | 0.7 |
441 |
2006 |
43.7 |
2.4 |
10.0 |
0.7 |
17.4 |
1.8 |
5.7 | 0.8 | 13.9 |
1.7 |
7.0 | 1.0 |
438 |
2007 |
46.5 |
2.4 |
8.6 |
0.5 |
16.4 |
1.8 |
4.6 | 0.8 | 15.6 |
1.8 |
7.5 | 1.1 |
450 |
2008 |
52.2 |
2.4 |
10.9 |
0.6 |
18.1 |
1.8 |
3.4 | 0.5 | 15.7 |
1.7 |
6.1 | 0.9 |
| 449 | 2009 | 59.0 | 2.3 | 13.7 | 0.8 | 22.3 | 2.0 | 4.3 | 0.6 | 16.9 | 1.8 | 7.7 | 1.1 |
| 448 | 2010 | 62.5 | 2.3 | 13.0 | 0.7 | 21.4 | 1.9 | 3.6 | 0.5 | 17.2 | 1.8 | 6.1 | 0.9 |
| 449 | 2011 | 56.1 | 2.4 | 10.3 | 0.5 | 16.3 | 1.8 | 2.7 | 0.4 | 20.7 | 1.9 | 6.1 | 0.8 |
| 450 | 2012 | 43.8 | 2.4 | 9.2 | 0.6 | 16.5 | 1.8 | 2.7 | 0.4 | 20.1 | 1.9 | 4.7 | 0.7 |
| 449 | 2013 | 46.8 | 2.4 | 8.5 | 0.5 | 12.0 | 1.5 | 1.6 | 0.3 | 16.9 | 1.8 | 3.4 | 0.6 |
| 447 | 2014 | 48.7 | 2.4 | 8.9 | 0.6 | 16.4 | 1.8 | 1.9 | 0.2 | 17.8 | 1.8 | 4.0 | 0.6 |
|
aPoolwide
analysis was not calculated because no data were collected for the
isolated backwater and Lake Pepin strata. |
|||||||||||||
Upper Pool 4a |
Year |
Submersed aquatic vegetation |
Rooted, floating-leaf vegetation |
Emergent vegetation |
|||||||||
n |
Frq |
± SE |
AI |
± SE |
Frq |
± SE |
Cov |
± SE |
Frq |
± SE |
Cov |
± SE |
|
| 130 | 1998 |
23.0 | 3.7 | 3.0 | 0.5 | 2.7 | 1.4 | 2.5 | 1.3 | 5.8 | 2.1 | 2.4 | 1.0 |
| 148 | 1999 |
21.0 | 3.4 | 2.5 | 0.4 | 4.0 | 1.6 | 0.8 | 0.3 | 12.0 | 2.7 | 3.7 | 1.3 |
| 170 | 2000 |
12.4 | 2.5 | 1.3 | 0.3 | 3.4 | 1.4 | 2.5 | 1.1 | 7.8 | 2.1 | 3.0 | 1.1 |
| 170 | 2001 |
9.7 | 2.3 | 0.9 | 0.2 | 2.0 | 1.1 | 0.2 | 0.1 | 9.4 | 2.3 | 2.0 | 0.7 |
| 170 | 2002 |
12.3 | 2.5 | 1.6 | 0.4 | 4.1 | 1.5 | 0.5 | 0.2 | 6.8 | 1.9 | 4.5 | 1.5 |
| – | 2003b |
– |
– |
– |
– |
– |
– |
– | – | – |
– |
– | – |
| 174 | 2004 |
6.0 | 1.8 | 0.6 | 0.2 | 2.7 | 1.2 | 0.5 | 0.3 | 5.2 | 1.7 | 1.2 | 0.6 |
| 140 | 2005 |
9.8 | 2.5 | 1.5 | 0.4 | 4.5 | 1.8 | 0.5 | 0.2 | 3.8 | 1.6 | 1.0 | 0.5 |
| 140 | 2006 |
8.7 | 2.4 | 2.5 | 1.0 | 2.3 | 1.3 | 1.0 | 0.6 | 7.6 | 2.3 | 3.4 | 1.3 |
| 138 | 2007 |
21.3 | 3.5 | 3.0 | 0.6 | 3.8 | 1.6 | 2.7 | 1.2 | 15.8 | 3.1 | 6.6 | 1.7 |
| 140 | 2008 |
27.7 | 3.8 | 4.8 | 0.9 | 4.5 | 1.8 | 0.5 | 0.2 | 18.3 | 3.3 | 5.6 | 1.5 |
| 139 | 2009 | 37.4 | 4.1 | 5.8 | 0.8 | 2.3 | 1.3 | 0.5 | 0.3 | 16.7 | 3.2 | 9.2 | 2.2 |
| 140 | 2010 | 39.2 | 4.2 | 5.8 | 0.7 | 1.5 | 1.0 | 0.2 | 0.1 | 18.8 | 3.3 | 8.3 | 2.0 |
| 140 | 2011 | 44.0 | 4.2 | 6.6 | 0.8 | 1.5 | 1.0 | 0.2 | 0.1 | 11.7 | 2.7 | 1.3 | 0.3 |
| 140 | 2012 | 22.6 | 3.6 | 3.2 | 0.6 | 4.5 | 1.8 | 0.5 | 0.2 | 8.4 | 2.4 | 1.6 | 0.6 |
| 140 | 2013 | 25.9 | 3.7 | 3.2 | 0.5 | 3.4 | 1.5 | 0.3 | 0.2 | 10.0 | 2.6 | 2.0 | 0.8 |
| 139 | 2014 | 25.6 | 3.7 | 3.4 | 0.5 | 2.3 | 1.3 | 0.2 | 0.1 | 8.1 | 2.3 | 2.0 | 0.8 |
|
aDoes not include Lake Pepin bAnalysis was not completed because no data were collected for the isolated backwater and Lake Pepin strata. |
|||||||||||||
Lower Pool 4a |
Year |
Submersed aquatic vegetation |
Rooted, floating-leaf vegetation |
Emergent vegetation |
|||||||||
n |
Frq |
± SE |
AI |
± SE |
Frq |
± SE |
Cov |
± SE |
Frq |
± SE |
Cov |
± SE |
|
| 259 | 1998 |
58.1 | 3.1 | 11.9 | 0.9 | 30.2 | 2.9 | 10.6 | 1.5 | 18.0 | 2.4 | 6.2 | 1.2 |
| 267 | 1999 |
57.4 | 3.0 | 9.1 | 0.5 | 21.7 | 2.5 | 4.2 | 0.7 | 13.2 | 2.1 | 4.3 | 1.0 |
| 279 | 2000 |
57.2 | 3.0 | 9.3 | 0.6 | 20.8 | 2.4 | 2.4 | 0.3 | 13.8 | 2.1 | 4.4 | 0.9 |
| 276 | 2001 |
60.4 | 3.0 | 10.3 | 0.6 | 16.8 | 2.3 | 3.0 | 0.6 | 14.5 | 2.1 | 5.4 | 1.0 |
| 280 | 2002 |
56.3 | 3.0 | 8.5 | 0.5 | 21.1 | 2.4 | 2.6 | 0.4 | 15.2 | 2.2 | 5.4 | 1.0 |
| – | 2003b |
– |
– |
– |
– |
– |
– |
– | – | – |
– |
– | – |
| 283 | 2004 |
54.3 | 3.0 | 9.5 | 0.6 | 20.8 | 2.4 | 4.0 | 0.7 | 20.8 | 2.4 | 11.7 | 1.6 |
| 177 | 2005 |
68.0 | 3.5 | 20.5 | 1.6 | 30.8 | 3.5 | 7.2 | 1.3 | 14.4 | 2.7 | 6.9 | 1.7 |
| 180 | 2006 |
73.3 | 3.3 | 17.5 | 1.2 | 34.0 | 3.5 | 10.3 | 1.5 | 23.1 | 3.2 | 13.1 | 2.2 |
| 180 | 2007 |
76.1 | 3.2 | 15.3 | 0.8 | 31.6 | 3.5 | 8.2 | 1.5 | 21.7 | 3.1 | 10.5 | 1.9 |
| 180 | 2008 |
80.9 | 3.0 | 18.8 | 1.0 | 35.3 | 3.6 | 6.8 | 1.1 | 22.7 | 3.1 | 10.4 | 1.9 |
| 180 | 2009 | 83.7 | 2.8 | 23.4 | 1.4 | 44.0 | 3.7 | 8.4 | 1.1 | 27.5 | 3.3 | 11.9 | 2.0 |
| 179 | 2010 | 81.9 | 2.9 | 20.4 | 1.1 | 42.6 | 3.7 | 6.2 | 0.9 | 26.7 | 3.3 | 9.0 | 1.5 |
| 180 | 2011 | 77.4 | 3.1 | 15.6 | 0.8 | 30.6 | 3.4 | 5.1 | 0.8 | 36.8 | 3.6 | 12.4 | 1.9 |
| 180 | 2012 | 72.3 | 3.4 | 16.9 | 1.1 | 33.6 | 3.5 | 5.6 | 1.0 | 39.9 | 3.7 | 9.5 | 1.5 |
| 180 | 2013 | 71.2 | 3.4 | 14.5 | 0.8 | 22.3 | 3.1 | 3.1 | 0.7 | 32.0 | 3.5 | 6.8 | 1.3 |
| 179 | 2014 | 74.5 | 3.3 | 15.2 | 1.0 | 31.5 | 3.5 | 3.7 | 0.5 | 35.0 | 3.6 | 8.1 | 1.4 |
aDoes not include Lake Pepin
b Analysis was not completed because no data were collected for the isolated backwater and Lake Pepin strata. |
|||||||||||||
Lake Pepin |
Year |
Submersed aquatic vegetation |
Rooted, floating-leaf vegetation |
Emergent vegetation |
|||||||||
n |
Frq |
± SE |
AI |
± SE |
Frq |
± SE |
Cov |
± SE |
Frq |
± SE |
Cov |
± SE |
|
| 86 | 1998 |
17.2 | 4.1 | 2.0 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 100 | 1999 |
14.7 | 3.6 | 2.1 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 150 | 2000 |
23.3 | 3.5 | 2.7 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 150 | 2001 |
15.1 | 2.9 | 1.9 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 150 | 2002 |
12.7 | 2.7 | 1.6 | 0.4 | 1.2 | 1.1 | 0.1 | 0.1 | 1.3 | 0.9 | 0.1 | |
| – | 2003a |
– |
– |
– |
– |
– |
– |
– | – | – |
– |
– | – |
| 154 | 2004 |
8.1 | 2.2 | 1.1 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.9 | 0.8 | 0.1 | 0.1 |
| 109 | 2005 |
9.6 | 2.8 | 1.0 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 2.5 | 1.5 | 0.2 | 0.2 |
| 110 | 2006 |
17.7 | 3.7 | 2.3 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 1.2 | 1.1 | 0.1 | 0.1 |
| 110 | 2007 |
18.0 | 3.7 | 2.0 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 3.5 | 1.8 | 2.1 | 1.2 |
| 110 | 2008 |
22.4 | 4.0 | 2.7 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 1.2 | 1.1 | 0.1 | 0.1 |
| 110 | 2009 | 34.5 | 4.6 | 4.4 | 0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.5 | 0.7 | 0.4 | 0.5 |
| 110 | 2010 | 46.2 | 4.8 | 6.7 | 0.8 | 0.0 | 0.0 | 0.0 | 0.0 | 1.2 | 1.1 | 0.4 | 0.3 |
| 110 | 2011 | 29.9 | 4.4 | 4.2 | 0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 110 | 2012 | 12.4 | 3.2 | 1.5 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 109 | 2013 | 20.4 | 3.9 | 2.1 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| 110 | 2014 | 20.9 | 3.9 | 2.4 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
a Analysis
was not completed because no data were collected for the isolated
backwater and Lake Pepin strata.
|
|||||||||||||
Pool 8 |
Year |
Submersed aquatic vegetation |
Rooted, floating-leaf vegetation |
Emergent vegetation |
|||||||||
n |
Frq |
± SE |
AI |
± SE |
Frq |
± SE |
Cov |
± SE |
Frq |
± SE |
Cov |
± SE |
|
516 |
1998 |
49.3 |
2.2 |
10.2 |
0.6 |
18.0 |
1.7 |
8.6 | 1.0 | 11.2 | 1.4 | 4.4 | 0.7 |
595 |
1999 |
58.1 |
2.0 |
10.5 |
0.5 |
19.0 |
1.6 |
7.9 | 0.9 | 15.0 | 1.5 | 7.0 | 0.8 |
649 |
2000 |
47.7 |
2.0 |
8.3 |
0.4 |
18.9 |
1.5 |
5.8 | 0.7 | 11.5 | 1.3 | 3.8 | 0.6 |
670 |
2001 |
47.5 |
1.9 |
7.8 |
0.4 |
18.1 |
1.5 |
4.9 | 0.6 | 9.9 | 1.2 | 2.7 | 0.4 |
644 |
2002 |
53.4 |
2.0 |
10.5 |
0.5 |
20.7 |
1.6 |
6.4 | 0.7 | 16.4 | 1.5 | 5.8 | 0.7 |
649 |
2003 |
55.2 |
2.0 |
9.9 |
0.4 |
21.4 |
1.6 |
8.4 | 0.9 | 17.7 | 1.5 | 8.3 | 0.9 |
649 |
2004 |
58.9 |
1.9 |
11.6 |
0.5 |
23.2 |
1.7 |
8.0 | 0.8 | 16.5 | 1.5 | 6.3 | 0.7 |
450 |
2005 |
70.6 |
2.2 |
16.7 |
0.6 |
29.1 |
2.2 |
8.0 | 0.9 | 20.0 | 1.9 | 7.3 | 0.9 |
444 |
2006 |
71.4 |
2.2 |
16.8 |
0.6 |
31.1 |
2.2 |
11.9 | 1.2 | 19.6 | 1.9 | 8.7 | 1.1 |
448 |
2007 |
70.9 |
2.2 |
17.0 |
0.7 |
38.8 |
2.3 |
14.0 | 1.3 | 24.0 | 2.0 | 13.8 | 1.4 |
447 |
2008 |
74.8 |
2.1 |
13.9 |
0.5 |
33.9 |
2.2 |
8.2 | 0.9 | 20.1 | 1.9 | 7.2 | 0.9 |
| 447 | 2009 | 80.4 | 1.9 | 17.0 | 0.6 | 39.4 | 2.3 | 9.8 | 0.9 | 26.8 | 2.1 | 11.9 | 1.2 |
| 444 | 2010 | 88.6 | 1.5 | 25.6 | 0.8 | 36.6 | 2.3 | 9.1 | 0.9 | 28.1 | 2.1 | 9.8 | 1.0 |
| 447 | 2011 | 77.6 | 2.0 | 14.8 | 0.5 | 26.8 | 2.1 | 6.2 | 0.8 | 18.6 | 1.8 | 4.2 | 0.6 |
| 450 | 2012 | 73.0 | 2.1 | 18.7 | 0.7 | 21.1 | 1.9 | 5.7 | 0.8 | 22.9 | 2.0 | 6.5 | 0.8 |
| 450 | 2013 | 70.2 | 2.2 | 14.4 | 0.6 | 27.3 | 2.1 | 5.5 | 0.7 | 27.8 | 2.1 | 6.3 | 0.7 |
| 449 | 2014 | 73.3 | 2.1 | 13.6 | 0.4 | 29.5 | 2.2 | 5.4 | 0.6 | 32.9 | 2.2 | 8.7 | 0.9 |
Pool 13 |
Year |
Submersed aquatic vegetation |
Rooted, floating-leaf vegetation |
Emergent vegetation |
|||||||||
n |
Frq |
± SE |
AI |
± SE |
Frq |
± SE |
Cov |
± SE |
Frq |
± SE |
Cov |
± SE |
|
531 |
1998 |
43.2 | 2.2 | 7.9 | 0.5 | 18.4 | 1.7 | 9.0 | 1.1 | 3.4 | 0.8 | 1.9 | 0.5 |
550 |
1999 |
42.1 | 2.1 | 8.0 | 0.5 | 20.4 | 1.7 | 10.0 | 1.1 | 4.8 | 0.9 | 1.5 | 0.4 |
578 |
2000 |
43.3 | 2.1 | 8.4 | 0.5 | 22.3 | 1.7 | 9.6 | 1.0 | 4.7 | 0.9 | 2.8 | 0.6 |
606 |
2001 |
42.0 | 2.0 | 9.4 | 0.6 | 23.9 | 1.7 | 11.1 | 1.1 | 5.8 | 1.0 | 3.1 | 0.6 |
579 |
2002 |
43.2 | 2.1 | 10.7 | 0.6 | 25.1 | 1.8 | 7.5 | 0.8 | 5.0 | 0.9 | 3.1 | 0.6 |
580 |
2003 |
40.6 | 2.0 | 9.9 | 0.6 | 27.5 | 1.9 | 9.7 | 1.0 | 7.2 | 1.1 | 4.1 | 0.7 |
648 |
2004 |
46.9 | 2.0 | 10.2 | 0.6 | 27.7 | 1.8 | 8.4 | 0.8 | 6.9 | 1.0 | 3.5 | 0.6 |
450 |
2005 |
56.9 | 2.4 | 13.8 | 0.7 | 29.2 | 2.2 | 9.9 | 1.1 | 6.0 | 1.1 | 2.8 | 0.6 |
450 |
2006 |
61.4 | 2.3 | 12.9 | 0.6 | 32.2 | 2.2 | 16.0 | 1.4 | 10.1 | 1.4 | 5.1 | 0.9 |
444 |
2007 |
59.6 | 2.3 | 15.4 | 0.8 | 30.5 | 2.2 | 16.0 | 1.5 | 11.4 | 1.5 | 5.5 | 0.9 |
448 |
2008 |
61.4 | 2.3 | 10.9 | 0.5 | 26.7 | 2.1 | 5.7 | 0.7 | 7.5 | 1.3 | 2.0 | 0.5 |
| 443 | 2009 | 63.5 | 2.3 | 16.1 | 0.8 | 34.6 | 2.3 | 13.9 | 1.3 | 10.0 | 1.4 | 6.0 | 1.0 |
| 448 | 2010 | 62.9 | 2.3 | 15.5 | 0.7 | 29.8 | 2.2 | 13.3 | 1.3 | 11.6 | 1.5 | 6.2 | 1.0 |
| 450 | 2011 | 57.6 | 2.3 | 12.1 | 0.6 | 25.4 | 2.1 | 5.8 | 0.8 | 11.2 | 1.5 | 3.3 | 0.6 |
| 448 | 2012 | 54.8 | 2.4 | 15.8 | 0.9 | 22.8 | 2.0 | 8.7 | 1.1 | 7.7 | 1.3 | 3.4 | 0.7 |
| 447 | 2013 | 53.2 | 2.4 | 11.7 | 0.7 | 30.0 | 2.2 | 6.6 | 0.8 | 9.2 | 1.4 | 3.1 | 0.6 |
| 449 | 2014 | 50.9 | 2.4 | 10.7 | 0.6 | 28.2 | 2.1 | 8.8 | 0.9 | 10.4 | 1.4 | 3.0 | 0.6 |
Pool 26 - alla |
Year |
Submersed aquatic vegetation |
Rooted, floating-leaf vegetation |
Emergent vegetation |
|||||||||
n |
Frq |
± SE |
AI |
± SE |
Frq |
± SE |
Cov |
± SE |
Frq |
± SE |
Cov |
± SE |
|
519 |
1998 |
6.1 | 1.1 | 1.6 | 0.3 | 5.2 | 1.0 | 1.0 | 0.3 | 4.4 |
0.9 |
1.1 | 0.3 |
647 |
1999 |
0.6 | 0.3 | 0.0 | 0.0 | 1.5 | 0.5 | 0.6 | 0.2 | 4.1 |
0.8 |
2.6 | 0.6 |
397 |
2000 |
5.7 | 1.2 | 1.3 | 0.3 | 4.3 | 1.0 | 0.5 | 0.1 | 5.7 |
1.2 |
2.0 | 0.5 |
413 |
2001 |
2.4 | 0.8 | 0.3 | 0.1 | 4.8 | 1.1 | 1.7 | 0.5 | 7.8 |
1.3 |
2.4 | 0.6 |
417 |
2002 |
2.3 | 0.7 | 0.4 | 0.1 | 4.0 | 1.0 | 1.3 | 0.5 | 10.1 |
1.5 |
5.3 | 1.0 |
420 |
2003b |
9.4 | 1.4 | 3.3 | 0.6 | 6.9 | 1.2 | 1.5 | 0.4 | 17.5 |
1.9 |
9.8 | 1.3 |
550 |
2004 |
0.6 | 0.3 | 0.1 | 0.0 | 2.1 | 0.6 | 0.4 | 0.2 | 9.8 |
1.3 |
3.7 | 0.7 |
| aAnalysis includes
Pool 26 of the Mississippi River and lower Alton Pool of the Illinois
River. bData were provided by the Illinois Natural History Survey based on a grant from the National Great Rivers Research and Education Center. |
|||||||||||||
Pool 26, MRa |
Year |
Submersed aquatic vegetation |
Rooted, floating-leaf vegetation |
Emergent vegetation |
|||||||||
n |
Frq |
± SE |
AI |
± SE |
Frq |
± SE |
Cov |
± SE |
Frq |
± SE |
Cov |
± SE |
|
312 |
1998 |
0.5 | 0.4 | 0.1 | 0.1 | 1.2 | 0.6 | 0.3 | 0.2 | 4.6 | 1.2 | 1.2 | 0.4 |
437 |
1999 |
0.1 | 0.1 | 0.0 | 0.0 | 1.1 | 0.5 | 0.2 | 0.1 | 7.3 | 1.3 | 4.6 | 0.9 |
257 |
2000 |
0.2 | 0.3 | 0.0 | 0.0 | 2.7 | 1.0 | 0.3 | 0.1 | 7.5 | 1.7 | 3.2 | 0.9 |
279 |
2001 |
0.0 | 0.0 | 0.0 | 0.0 | 0.8 | 0.5 | 0.1 | 0.1 | 1.6 | 0.8 | 0.4 | 0.3 |
277 |
2002 |
0.2 | 0.3 | 0.0 | 0.0 | 2.5 | 0.9 | 0.6 | 0.3 | 7.4 | 1.6 | 4.2 | 1.1 |
280 |
2003b |
0.0 | 0.0 | 0.0 | 0.0 | 1.5 | 0.7 | 0.3 | 0.2 | 6.9 | 1.5 | 3.7 | 1.0 |
362 |
2004 |
0.0 | 0.0 | 0.0 | 0.0 | 2.8 | 0.9 | 0.6 | 0.3 | 10.9 | 1.6 | 5.0 | 1.0 |
| aPool 26, Mississippi
River bData were provided by the Illinois Natural History Survey based on a grant from the National Great Rivers Research and Education Center. |
|||||||||||||
Pool 26 - ILa |
Year |
Submersed aquatic vegetation |
Rooted, floating-leaf vegetation |
Emergent vegetation |
|||||||||
n |
Frq |
± SE |
AI |
± SE |
Frq |
± SE |
Cov |
± SE |
Frq |
± SE |
Cov |
± SE |
|
207 |
1998 |
14.1 | 2.4 | 3.9 | 0.8 | 10.9 | 2.2 | 2.0 | 0.6 | 4.2 | 1.4 | 0.9 | 0.5 |
210 |
1999 |
1.4 | 0.8 | 0.1 | 0.1 | 2.1 | 1.0 | 1.0 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 |
135 |
2000 |
12.4 | 2.8 | 2.9 | 0.8 | 6.2 | 2.1 | 0.8 | 0.3 | 3.5 | 1.6 | 0.5 | 0.3 |
134 |
2001 |
5.4 | 2.0 | 0.7 | 0.3 | 9.8 | 2.6 | 3.7 | 1.2 | 15.6 | 3.2 | 4.8 | 1.4 |
140 |
2002 |
5.0 | 1.9 | 0.8 | 0.3 | 5.9 | 2.0 | 2.3 | 1.1 | 13.4 | 2.9 | 6.7 | 1.8 |
140 |
2003b |
21.0 | 3.5 | 7.4 | 1.6 | 13.4 | 2.9 | 3.0 | 1.1 | 30.6 | 3.9 | 17.5 | 2.8 |
188 |
2004 |
1.3 | 0.8 | 0.2 | 0.1 | 1.3 | 0.8 | 0.1 | 0.1 | 8.5 | 2.0 | 2.2 | 0.8 |
| aLower
Alton Pool, Illinois River bData were provided by the Illinois Natural History Survey based on a grant from the National Great Rivers Research and Education Center. |
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La Grange Poola |
Year |
Submersed aquatic vegetation |
Rooted, floating-leaf vegetation |
Emergent vegetation |
|||||||||
n |
Frq |
± SE |
AI |
± SE |
Frq |
± SE |
Cov |
± SE |
Frq |
± SE |
Cov |
± SE |
|
464 |
1998 |
0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 0.3 | 0.0 | 0.0 | 2.6 | 0.7 | 0.9 | 0.3 |
538 |
1999 |
0.0 | 0.0 | 0.0 | 0.0 | 0.5 | 0.3 | 0.1 | 0.1 | 3.1 | 0.8 | 2.8 | 0.7 |
368 |
2000 |
0.0 | 0.0 | 0.0 | 0.0 | 6.0 | 1.2 | 0.7 | 0.1 | 1.3 | 0.6 | 0.6 | 0.3 |
357 |
2001 |
0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 0.3 | 0.1 | 0.1 | 0.9 | 0.5 | 0.8 | 0.5 |
369 |
2002 |
0.0 | 0.0 | 0.0 | 0.0 | 2.2 | 0.8 | 0.3 | 0.1 | 2.6 | 0.8 | 1.9 | 0.6 |
347 |
2003b |
0.0 | 0.0 | 0.0 | 0.0 | 1.3 | 0.6 | 0.2 | 0.1 | 2.6 | 0.9 | 1.4 | 0.5 |
471 |
2004 |
0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 0.5 | 0.2 | 0.1 | 0.3 | 0.3 | 0.2 | 0.1 |
| aLakes are
not influenced by the Illinois River; therefore, the lakes stratum
was not included in the poolwide analysis. bData were provided by the Illinois Natural History Survey based on a grant from the Illinois Department of Natural Resources. |
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Content manager: Danelle Larson
Page Last Modified: April 17, 2018