Table 2. Numbers of amphibians found in the wetted channel in 10, 2-m lengths searched in and below each unit (except where noted).

Timber Sale
Unit
Tailed Frog4

Ascaphus truei
Pacific Giant Salamander5

Dicamptodon tenebrosus
Cascade Torrent Salamander6

Rhyacotriton cascadae
Grand Total

 

 

1998

1999

1998

1999

1998

1999

1998

1999

Total
Blue River Face No Buffer (5DE)1
0
0
12
9
0
0
12
9
21
  Buffer (5B)
0
0
15
8
0
0
15
8
23
  Control
0
0
8
6
0
0
8
6
14
  Total
0
0
35
23
0
0
35
23
58
North Fork Quartz No Buffer (2B) 
0
0
17
10
6
1
23
11
34
  Buffer (2E) 
6
3
0
0
38
29
44
32
76
  Control 
0
0
23
4
10
7
33
11
44
  Total 
6
3
40
14
54
37
100
54
154
Wolf-Mann 20A2 
-
0
-
0
-
0
-
0
0
  20B2 
-
0
-
0
-
0
-
0
0
  20AB2 
-
0
-
2
-
0
-
2
2
  20C 
-
0
-
7
-
0
-
7
7
  Control3 
-
0
ннннн -
0
ннннн -
0
ннннн -
0
0
  Total 
-
0
ннннн -
9
ннннн -
0
ннннн -
9
9
  Grand Total
6
3
75
46
54
37
135
86
221
        1Only 5 areas searched, all within unit, because stream channel disappeared below unit.
        2Streams A and B joined below the road to form stream AB, thus 5 areas searched on A, 5 on B, and 5 on AB.
        3Only 5 areas searched because of shortness of segment.
        4Metamorphosed individuals only.
        5Larval individuals only.
        6Larval and metamorphosed individuals.

         

Table 3. Area-weighted average densities (numbers per m2) of amphibians found in the wetted channel in 10, 2-m lengths searched in and below each unit (except where noted).

  
Timber Sale
    Unit

Tailed Frog4

Ascaphus truei
 Pacific Giant Salamander5

Dicamptodon tenebrosus
Cascade Torrent Salamander6

Rhyacotriton cascadae
Grand Total/Average
 
 
1998
1999
1998
1999
1998
1999
1998
1999
Average
Blue River Face
No Buffer (5DE)1 
0
0
1.67
1.36
0
0
1.67
1.36
1.52
 
Buffer (5B) 
0
0
0.99
0.43
0
0
0.99
0.43
0.68
 
Control 
0
0
0.52
0.40
0
0
0.52
0.4
0.46
 
Average 
0
0
0.93
0.57
0
0
0.93
0.57
0.74
North Fork Quartz
No Buffer (2B) 
0
0
1.18
0.76
0.42
0.08
1.60
0.84
1.24
 
Buffer (2E) 
0.49
0.41
0
0
3.11
3.92
3.61
4.32
3.88
 
Control 
0
0
1.52
0.39
0.66
0.68
2.25
1.07
1.77
 
Average 
0.14
0.10
0.96
0.45
1.29
1.20
2.42
1.75
2.14
Wolf-Mann
20A2 
-
0
-
0
-
0
-
0
-
 
20B2 
-
0
-
0
-
0
-
0
-
 
20AB2 
-
0
-
0.50
-
0
-
0.50
-
 
20C 
-
0
-
0.88
-
0
-
0.88
-
 
Control3 
-
0
-
0
-
0
-
0
-
 
Average 
-
0
-
0.37
-
0
-
0.37
-
 
Grand Average
0.08
0.03
0.94
0.48
0.68
0.39
1.71
0.90
-
            1Only 5 areas searched, all within unit, because stream channel disappeared below unit.
            2Streams A and B joined below the road to form stream AB, thus 5 areas searched on A, 5 on B, and 5 on AB.
            3Only 5 areas searched because of shortness of segment.
            4Metamorphosed individuals only.
            5Larval individuals only.
            6Larval and metamorphosed individuals.

             

Table 4. Percent occupancy by amphibians of 10, 2-m lengths of wetted channel, searched in and below each unit (except where noted).

Timber Sale
     Unit
Tailed Frog4

Ascaphus truei

Pacific Giant Salamander5

Dicamptodon tenebrosus
Cascade Torrent Salamander6

Rhyacotriton cascadae
Grand Total/Average
 
  
1998
1999
1998
1999
1998
1999
1998
1999
Average
Blue River Face
 No Buffer (5DE)1 
0
0
80
80
0
0
80
80
80
 
 Buffer (5B) 
0
0
70
70
0
0
70
70
70
 
 Control 
0
0
50
50
0
0
50
80
65
 
 Average 
0
0
64
64
0
0
64
64
64
North Fork Quartz
 No Buffer (2B) 
0
0
70
60
40
10
100
70
85
 
 Buffer (2E) 
60
30
0
0
100
80
100
80
90
 
 Control 
0
0
70
40
40
20
80
50
65
 
 Average 
20
10
47
33
60
37
93
67
80
Wolf-Mann
 A2 
-
0
-
0
-
0
-
0
-
 
 B2 
-
0
-
0
-
0
-
0
-
 
 20AB2 
-
0
-
40
-
0
-
40
-
 
 20C 
-
0
-
50
-
0
-
50
-
 
 Control3 
-
0
-
0
-
0
-
0
-
 
 Average 
-
0
-
23
-
0
-
23
-
 
 Grand Average
11
4
55
39
33
13
80
51
62
          1Only 5 areas searched, all within unit, because stream channel disappeared below unit.
          2Streams A and B joined below the road to form stream AB, thus 5 areas searched on A, 5 on B, and 5 on AB.
          3Only 5 areas searched because of shortness of segment.
          4Metamorphosed individuals only.
          5Larval individuals only.
          6Larval and metamorphosed individuals.

           

           

Table 5. Channel, wood, and step characteristics over consecutive 5-m reaches (population standard deviation is given in parentheses for some measurements).

Timber Sale Unit
Transect Length (# 5-m sections)
Ave.Active Channel Width (10-cm Class1)
Ave.Active Channel Depth (10-cm Class1)
Ave.Slope(%)
Ave.Active Channel Bedrock(%)
# steps 2/100 m
% steps 2Wood
   
 
 
 
 
 
 
 
Blue River Face No Buffer (5DE) 
44
10(5) 
2(2)
16(9)
0(0)
7.0
93
  Buffer (5B) 
38
14(8) 
3(1)
10(6)
0(0)
2.2
100
  Control 
22
14(2) 
3(1)
17(6)
0(0)
11.4
83
  Total/Average 
104
12
3
14
0
6.2
93
North Fork Quartz No Buffer (2B) 
36
13(4) 
3(2)
36(9)
33(36)
11.4
70
  Buffer (2E) 
14 
16(3) 
3(1)
38(5)
0(0)
18.5
75
  Control 
39
19(8) 
6(2)
39(10)
2(10)
16.3
68
  Total/Average 
89
16
4
38
14
14.7
70
Wolf-Mann 20A 
42
9(3) 
3(1)
36(13)
1(5)
12.2
88
  20B 
43
7(4) 
3(2)
36(9)
0(0)
2.9
100
  20C 
43
15(5) 
3(1)
43(11)
18(33)
7.6
88
  Control 
41
8(5) 
3(2)
37(18)
0(3)
1.5
100
  Total/Average 
169
10
3
38
5
6.1
94
  Grand Total/Average
362
12
3
31
6
8.2
88
1 0=2-<10 cm, 1=10-<20 cm, 2=20-<30 cm, etc.

2 Steps >=30 cm in height which have a wood piece as the key piece in the step structure, or which have a combination of wood and rock key pieces

 

 

Table 6. Step heights and diameters of key wood pieces involved in formation of the step. Tallies for steps with only wood key pieces are listed to the left of the forward slash, and tallies for steps with a combination of wood and rock key pieces are listed to the right of the slash. Rock steps, in which wood did not contribute a key piece, are listed separately.

Wood Diameter (10-cm Classes1)
Channel Step Height (10-cm Classes1)
 
3
4
5
6
7
8
9
10
11
12
14
16
Total
0
13/0
15/1
3/2
5/0
3/1
1/0
1/0
0/1
-
0/1
-
0/1
41/7
1
4/0
5/0
2/1
2/1
3/0
-
-
-
-
-
-
-
16/2
2
2/0
3/2
8/0
2/1
3/0
5/1
1/0
0/1
-
0/1
-
- 
24/6
3
1/0
1/0
2/0
3/0
-
-
1/0
1/0
1/0
- 
-
- 
10/0
4
-
-
1/0
1/0
-
1/0
0/1
-
-
-
-
- 
3/1
5
-
1/0
1/0
-
-
1/0
-
-
1/0
-
-
- 
4/0
6
-
-
-
1/0
1/0
-
-
-
-
-
-
- 
2/0
Total Wood/Wood-Rock Steps
20/0
25/3
17/3
14/2
10/1
8/1
3/1
1/2
2/0
0/2
-
0/1
100/16
Rock Steps
1
7
7
3
4
1
1
1
 
 
1
 
26
Total
21
35
27
19
15
10
5
4
2
2
1
1
142

1 0=2-<10 cm, 1=10-<20 cm, 2=20-<30 cm, etc.

Table 7. Tallies of wood diameter classes over and within active channels, and contributions to step structures >=30 cm in height.

Wood 10-cm Diameter Class
Over the Active Channel
Within the Active Channel
Grand Total
Wood as Key Piece in Steps
Percent of in channel wood as key pieces in steps
0
819
1926
2745
48
2
1
102
217
319
18
8
2
99
192
291
30
16
3
82
119
201
10
8
4
31
64
95
4
6
5
16
33
49
4
12
6
10
17
27
2
12
7
8
4
12
0
0
8
5
6
11
0
0
9
4
9
13
0
0
10
4
8
12
0
0
Grand Total
1180
2595
3775
115
4