Upper Midwest Environmental Sciences Center

UMESC - LTRMP Reports - Macroinvertebrate - Table 5. Mean number of fingernail clams per square meter by study reach and aquatic area
Macroinvertebrate Update Title Page
 Tables

Table 4.

Mean number of fingernail clams per square meter by study reach and aquatic strata. For sample sizes, refer to Table 1. The wash frame sieve size was changed from a U.S. Standard Sieve no. 30 (0.595 µm), used in 1992, to a U.S. Standard Sieve no. 16 (1.18 mm) in 1993. SE=standard error.

Study reach
Year
Backwater
contiguous
±
1 SE
Impoundeda
±
1 SE
Side channel
±
1 SE
Main channel
border
±
1 SE
Pool 4
1992
24
6
58
23
7
3
15
9
 
1993
13
3
94
13
2
2
2
2
 
1994
23
6
111
15
2
2
0
0
 
1995
8
3
79
16
12
10
7
4
 
1996
13
5
51
9
3
2
0
0
 
1997
5
2
103
11
2
2
5
5
 
1998
24
7
94
12
0
0
9
9
 
1999
21
6
185
27
0
0
0
0
 
2000
30
5
156
18
2
2
0
0
 
2001
18
4
138
18
6
6
0
0
 
2002
19
5
104
 12
0
0
0
0
 
2003b
—
—
—
—
—
—
—
—
 
2004
81
11
84
12
48
29
8
8
a Impounded area for Pool 4 is Lake Pepin, a Tributary Delta Lake
bSampling not conducted in 2003 because of budget constraints.

Study reach
Year
Backwater
contiguous
±
1 SE
Impounded
±
1 SE
Side channel
±
1 SE
Main channel
border
±
1 SE
Pool 8
1992
11
4
18
15
1
1
1
1
 
1993
41
31
21
4
7
4
4
3
 
1994
14
8
12
4
10
5
0
0
 
1995
10
6
7
2
0
0
4
4
 
1996
2
1
3
1
1
1
0
0
 
1997
10
2
4
1
17
8
13
9
 
1998
23
6
34
8
18
10
13
13
 
1999
75
27
864
206
321
202
131
129
 
2000
58
26
496
85
83
35
17
8
2001
79
22
276
48
59
36
81
44
  2002
58
15
378
38
194
78
31
20
2003
81
30
371
54
167
67
40
22
  2004
181
47
1089
105
510
170
12
12


Study reach
Year
Backwater
contiguous
±
1 SE
Impounded
±
1 SE
Side channel
±
1 SE
Main channel
border
±
1 SE
Pool 13
1992
114
32
82
16
81
43
10
5
 
1993
87
31
5856
1067
110
50
176
129
 
1994
176
39
1270
338
44
21
3
2
 
1995
117
29
525
164
47
25
59
37
 
1996
98
21
413
90
92
27
88
73
 
1997
102
21
111
29
33
20
23
10
 
1998
178
45
194
30
37
21
35
26
 
1999
95
27
260
52
15
10
10
9
 
2000
170
63
139
22
85
52
10
8
 
2001
93
34
591
152
25
19
342
320
  2002
194
45
609
84
87
57
238
218
2003
100
36
468
84
66
52
19
10
  2004
90
34
529
127
41
36
8
8


Study reach
Year
Backwater
contiguous
±
1 SE
Impounded
±
1 SE
Side channel
±
1 SE
Main channel
border
±
1 SE
Pool 26
1992
3
2
95
39
1
1
17
12
 
1993
8
3
22
9
0
0
0
0
 
1994
14
7
41
23
0
0
4
3
 
1995
1
1
1
1
—a
—
—a
—
 
1996
2
1
3
1
0
0
0
0
 
1997
5
3
7
4
1
1
0
0
 
1998
3
3
11
10
1
1
5
5
 
1999
2
2
6
3
1
1
1
1
 
2000
0
0
4
2
0
0
0
0
 
2001
4
2
9
4
3
3
0
0
 
2002
8
3
24
7
0
0
0
0
 
2003b
—
—
—
—
—
—
—
—
 
2004
26
13
36
13
1
1
0
0
aSampling not completed because of high water.
bSampling not conducted in 2003 because of budget constraints.

 

Study reach
Year
Side channel
±
1 SE
Main channel
border
±
1 SE
Open River Reach
1992
14
7
4
3
 
1993a
—
—
—
—
 
1994
0
0
1
1
 
1995
0
0
0
0
 
1996
0
0
0
0
 
1997a
—
—
—
—
 
1998
0
0
0
0
 
1999
0
0
0
0
 
2000
0
0
0
0
 
2001b
—
—
—
—
aSampling not conducted in 1993 or 1997 because of high water.
bSampling discontinued in 2001.



Study reach
Year
Backwater
contiguous
±
1 SE
Side channel
±
1 SE
Main channel
border
±
1 SE
La Grange Pool
1992
4
3
11
6
3
2
 
1993
14
8
49
28
17
9
 
1994
40
14
62
11
59
12
 
1995
6
3
33
12
20
12
 
1996
9
5
3
1
3
2
 
1997
22
12
11
4
3
2
 
1998
8
3
34
10
25
16
 
1999
18
7
32
9
9
4
 
2000
21
18
4
2
6
4
 
2001
17
6
17
7
5
2
 
2002
43
24
74
20
25
9
 
2003a
—
—
—
—
—
—
 
2004
18
9
9
4
3
2
aSampling not conducted in 2003 because of budget constraints.

Content manager: Jennie Sauer


Page Last Modified: April 17, 2018