Impact of Urbanization on Stream Bacterial Communities
Author Information
Author(s): Wang Si-Yi, Sudduth Elizabeth B., Wallenstein Matthew D., Wright Justin P., Bernhardt Emily S.
Primary Institution: Duke University
Hypothesis
How does watershed urbanization affect the composition and function of stream microbial communities?
Conclusion
Watershed urbanization significantly alters the composition of stream bacterial communities, which may impact ecosystem functions like denitrification.
Supporting Evidence
- Bacterial community composition was significantly affected by watershed urbanization.
- Denitrification potentials varied widely but were not significantly associated with substrate supply.
- The study captured 45% of the variation in denitrification potential using community composition data.
Takeaway
When cities grow, the tiny bacteria in nearby streams change, which can affect how well those streams clean up pollution.
Methodology
The study involved sampling sediments from eight streams over two years to analyze bacterial community composition and denitrification potentials.
Potential Biases
Potential biases may arise from the sampling methods and the limited number of study sites.
Limitations
The study was limited by unmeasured covariates that could confound the results.
Participant Demographics
Streams were selected based on varying degrees of watershed urbanization in central North Carolina.
Statistical Information
P-Value
<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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