Bacterial Multifunctionality in Biofilms
Author Information
Author(s): Peter Hannes, Ylla Irene, Gudasz Cristian, Romaní Anna M., Sabater Sergi, Tranvik Lars J.
Primary Institution: Uppsala University
Hypothesis
Individual ecosystem functions are affected by the loss of diversity.
Conclusion
Reduced diversity impairs multifunctionality to a much larger extent than it diminishes individual functions.
Supporting Evidence
- High diversity treatments showed greater likelihood of sustaining multifunctionality.
- Old biofilms had a reduced likelihood of all enzymes being active, especially when diversity was low.
- Bioreactors fed with labile carbon were less affected by the loss of diversity.
Takeaway
This study shows that having a lot of different bacteria helps them do many jobs better, like breaking down food in water. If there are fewer types of bacteria, they can't work as well together.
Methodology
The study manipulated the diversity of bacterial biofilms in bioreactors and measured the activity of extracellular enzymes and the degradation of dissolved organic carbon.
Potential Biases
The dilution-to-extinction approach may lead to non-stochastic removal of rare organisms.
Limitations
The molecular fingerprinting technique used may not reveal all community members, focusing only on the most abundant.
Participant Demographics
Bacterial communities collected from a stream in Sweden.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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