Volume 15, Number 7—July 2009
Research
Increased Host Species Diversity and Decreased Prevalence of Sin Nombre Virus
Laurie J. Dizney
and Luis A. Ruedas
and Luis A. Ruedas
Table 1
Vegetative factors measured within each site and their transformations, Portland, Oregon, USA, October 2002−September 2005
| Habitat | Description | Transformation |
|---|---|---|
| Tree cover | % Plot covered with trees | log10 +1 |
| Shrub cover | % Plot covered with shrubs | Square root |
| Bryophyte | % Plot covered with bryophytes | Square root |
| Bare ground | % Plot that is bare ground | log10 +1 |
| Bare ground and litter | % Plot that is bare ground and bare ground covered with litter | Square root |
| Ground cover | % Ground of plot that has any cover, including plants, logs, litter | None |
| Plant ground cover | % Plot that has only plant ground cover | None |
| Coarse woody debris | % Plot that is logs, stumps, snags | log10 +1 |
| Trees | No. all trees | log10 +1 |
| Large trees | No. trees >25 cm circumference | log10 +1 |
| Maximum tree height | Tallest tree in plot | None |
| Total shrubs | No. all shrubs | log10 +1 |
| Small shrubs | No. shrubs <99 cm tall | Omitted |
| Large shrubs | No. shrubs >100 cm tall | Omitted |
| Plant species | No. plant species | None |
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