Table 1. Example of a case data table of a species from multiple surveys. Such data can be used to induce an initial network structure or to refine probabilities of relations in an existing network. Column headings refer to case number, and input and output nodes in the model for the rare fungus Bridgeoporus nobilissimus (B. nob.; Fig. 3a). * = missing data. (Data sources: T. O’Dell and T. Dreisbach, personal communication).


 Input nodes
 Output node
Case number
 Node X: Abies procera boles, cm dbh
 Node Y: Abies procera snags, cm dbh
 Node Z: Abies procera stumps, cm dbh
 Node B: Other bold conks
 Node C: Mesic indicator plants
 Node J2: Vegetative cover, %
 Node A: B. nob. presence
1
 0
 0
 130
 rare to absent
 sparse
 85
 present
2
 0
 0
 110
 present
 abundant
 85
 present
3
 0
 0
 130
 present
 abundant
 80
 present
4
 100
 100
 0
 present
 abundant
 85
 present
5
 90
 0
 100
 present
 abundant
 45
 absent
6
 *
 *
 *
 *
 abundant
 95
 absent
7
 100
 *
 *
 *
 abundant
 100
 absent
8
 75
 *
 *
 *
 sparse
 100
 absent
9
 75
 50
 75
 *
 sparse
 100
 absent
10
 75
 *
 *
 *
 absent
 70
 absent
11
 150
 150
 150
 *
 abundant
 100
 absent
12
 150
 *
 *
 *
 sparse
 100
 absent
13
 150
 *
 *
 *
 abundant
 100
 absent
14
 100
 100
 100
 *
 absent
 *
 absent
15
 75
 50
 *
 *
 abundant
 100
 absent
16
 100
 0
 0
 *
 absent
 80
 absent
17
 75
 75
 75
 *
 sparse
 50
 absent
18
 80
 50
 50
 *
 abundant
 100
 absent
19
 *
 *
 *
 *
 abundant
 80
 present
20
 *
 *
 107
 *
 abundant
 100
 present
21
 *
 *
 *
 *
 abundant
 100
 present
22
 *
 *
 122
 *
 abundant
 *
 present
23
 *
 *
 *
 *
 abundant
 *
 present
24
 50
 100
 0
 present
 sparse
 90
 present
25
 100
 100
 0
 present
 abundant
 75
 present
26
 0
 0
 100
 rare to absent
 sparse
 75
 present
27
 100
 0
 100
 present
 sparse
 70
 present
28
 100
 0
 100
 present
 abundant
 90
 present
29
 0
 0
 100
 rare to absent
 abundant
 93
 present
30
 100
 100
 0
 rare to absent
 abundant
 85
 present
31
 0
 0
 100
 rare to absent
 abundant
 95
 present
32
 100
 0
 100
 rare to absent
 sparse
 70
 present
33
 100
 100
 *
 present
 sparse
 90
 present
34
 100
 0
 100
 present
 sparse
 90
 present
35
 0
 0
 100
 present
 abundant
 95
 present
36
 100
 0
 100
 rare to absent
 abundant
 95
 present
37
 100
 30
 0
 rare to absent
 abundant
 80
 present
38
 30
 30
 100
 present
 abundant
 80
 present
39
 30
 0
 100
 present
 sparse
 44
 present
40
 100
 10
 100
 rare to absent
 sparse
 85
 present
41
 100
 0
 100
 present
 sparse
 95
 present
42
 100
 30
 100
 present
 abundant
 85
 present
43
 10
 0
 100
 present
 abundant
 75
 present
44
 30
 0
 100
 rare to absent
 abundant
 70
 present
45
 100
 0
 100
 present
 sparse
 58
 present