Geoscience Reference
In-Depth Information
Table 7.3
Sampling Intensities Needed to Detect Overall Population Changes of 50%, 25%, and 10% over 10 Years of Annual
Monitoring of Animal Populations
50%
25%
10%
Group
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
Mammals, large
10
10
10
10
10
10
10
10
10
10
10
10
10
20
40
Grasses and sedges
10
10
10
10
10
10
10
10
10
20
20
20
30
40
70
Herbs, Compositae
10
10
10
10
10
10
10
10
10
20
20
20
30
40
80
Herbs, non-Compositae
10
10
10
10
10
10
10
10
10
20
20
30
30
50
80
Turtles
10
10
10
10
10
10
10
20
20
40
40
50
70
90
170
Terrestrial salamanders
10
10
10
10
10
10
20
20
20
40
50
50
70
110
190
Large-bodied birds
10
10
10
10
10
10
10
20
20
40
50
60
70
110
210
Lizards
10
10
10
10
20
20
20
20
30
50
60
70
100
150
280
Fishes, salmonids
10
10
10
10
20
20
20
30
40
70
80
90
120
180
370
Caddis flies
10
10
10
20
20
20
20
30
40
70
80
100
120
200
380
Snakes
10
10
10
20
30
20
20
30
50
80
90
120
150
220
460
Dragonflies
10
10
10
20
30
20
30
30
50
80
100
130
170
230
470
