They also note that, in this study, the temperature at which P. The researchers say their findings suggest that many forms of microbe-microbe killing not traditionally associated with predation - the consumption of a killed organism by its killer - may in fact result in it. xanthus, the production of which appears to be influenced by temperature. They homed in on a non-protein substance released by P. The researchers conducted further experiments to better understand the mechanism by which growth at chillier temperatures may have reversed the predator-prey roles. ![]() fluorescens killing and obtaining nutrients from M. fluorescens was grown at 22 degrees Celsius, the predator-prey relationship switched, with P. xanthus acted as the predator and extensively killed P. fluorescens was grown in a dish at 32 degrees Celsius and then exposed to M. Building on that knowledge, Vasse and colleagues conducted several laboratory experiments to test how temperature might influence the predator-prey relationship between the bacterial species Myxococcus xanthus and Pseudomonas fluorescens. Some bacteria prey on others, and ecological context can influence predation efficiency. However, there are few other known examples of such switching in response to non-biological ecological changes. In addition, predator-prey relationships can sometimes switch, as is the case for two crustacean species that mutually prey on each other, where a change in surrounding salinity reverses which species dominates. For instance, similarity or contrast between background color and coloration of a prey species can influence how easily it is detected by predators. Prior research has shown that ecological context can influence predator-prey relationships.
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