Disturbance Promotes Non-Indigenous Bacterial Invasion in Soil Microcosms: Analysis of the Roles of Resource Availability and Community Structure
Figure 5
Heating decreased flagellate numbers.
We studied survival of cultivable heterotrophic flagellates in soil microcosms exposed to different heating intensities (15°C, 60°C, 75°C or 90°C) for 24 h. After heating we washed the microcosms to remove soluble carbon, and to each heating treatment we subsequently amended soluble carbon corresponding to that produced from the four heating treatments to separate the effects of heating on community structure and on release of soluble carbon. Heating to 75°C or 90°C permanently eliminated heterotrophic flagellates, whereas they recovered at 60°C heating. Carbon amendment had no significant effect on the heterotrophic flagellates. P-values refer to two-way ANOVA's performed on the two different situations: data were log transformed to equalize variances; all P-values shown.