Table 1 Ratio of M. vaginatus over M. steenstrupii attained in enrichment cultures after 1 to 2 months of incubation as a function of temperature and inoculum source.

Original ratios have their basis in data for the sites (shown in Fig. 1).

Inoculum sourceRatio
OriginalAfter enrichment
at 4°Cat 15°Cat 30°C
Site 7 (Colorado Plateau)6.0027110.20
Site 3 (Colorado Plateau)1.5548350.16
Site 15 (Sonoran Desert)0.19920.03
Site 20 (Mojave Desert)0.07*200.17

*Insufficient biomass development for counts