TABLE 6.
Number of publications reporting sampling strategies, use of statistical analyses to test hypotheses concerning microbial biodiversity, and replicated tests of hypotheses for the themes Effect, Dynamics, and Source
| Themea | No. of publications analyzed
|
|||
|---|---|---|---|---|
| Totalb | Samplingc | Statisticsd | Replicatione | |
| Effect of a defined factor | ||||
| Habitat | ||||
| Aquatic | 11 | 4 | 0 | 0 |
| Soil | 60 | 51 | 27 | 4 |
| Rhizosphere | 69 | 57 | 29 | 7 |
| Mycorrhizae | 48 | 44 | 35 | 2 |
| Fungal/plant pathosystems | 16 | 14 | 11 | 6 |
| Bacterial/plant systems | 12 | 6 | 4 | 1 |
| Food | 6 | 5 | 2 | 0 |
| Food factories | 1 | 0 | 0 | 0 |
| All systems | 223 | 181 | 108 | 20 |
| Spatial or temporal dynamics | ||||
| Habitat | ||||
| Aquatic | 41 | 10 | 0 | 0 |
| Soil | 37 | 29 | 14 | 2 |
| Rhizosphere | 31 | 24 | 9 | 5 |
| Mycorrhizae | 13 | 12 | 9 | 1 |
| Fungal/plant pathosystems | 30 | 26 | 19 | 5 |
| Bacterial/plant systems | 21 | 5 | 1 | 0 |
| Food | 19 | 12 | 2 | 0 |
| Food factories | 8 | 0 | 2 | 0 |
| All systems | 200 | 118 | 56 | 13 |
| Sources of contamination | ||||
| Habitat | ||||
| Aquatic | 0 | 0 | 0 | 0 |
| Soil | 1 | 0 | 0 | 0 |
| Rhizosphere | 0 | 0 | 0 | 0 |
| Mycorrhizae | 1 | 1 | 0 | 0 |
| Fungal/plant pathosystems | 4 | 3 | 2 | 1 |
| Bacterial/plant systems | 7 | 2 | 0 | 0 |
| Food | 4 | 4 | 0 | 0 |
| Food factories | 31 | 5 | 2 | 0 |
| All systems | 48 | 15 | 4 | 1 |
a
Themes are described in Table 2.
b
Total number of publications analyzed for a given habitat within each theme.
c
Number of publications in which the sampling strategy (the time and space within which samples were collected) was clearly defined.
d
Number of publications describing sampling strategies and employing statistical tests to evaluate the principal hypotheses concerning microbial biodiversity.
e
Number of publications reporting replicated or multiple independent tests of the principal hypotheses concerning microbial biodiversity.