Evidence details
miller.jesse.n@epa.gov on 02 Oct 2021
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Study
- Citation
- Hitt, N., & Chambers, D. (2014). Temporal changes in taxonomic and functional diversity of fish assemblages downstream from mountaintop mining. Freshwater Science.
- Study description
- This study examined the effects of mountain top mining on fish assemblage structure and function via sampling in the Guyandotte River basin of West Virginia.
Response
- Cause term/trajectory
-
Effluent - mining
(Increase)
- Cause description
- Connection of the mining effluent to the river, which is enumerated by conductivity and dissolved Se.
- Effect term/trajectory
-
Fish - richness
(Decrease)
- Effect description
- Measures of taxonomic diversity (species richness, abundance, Shannon diversity) and functional diversity (functional richness, functional evenness, functional divergence)
- Response measure type
- Other
- Response measure value
- -1.72
- Response measure error type
- Other
- Response measure description
- We assessed significance from the proportion of the simulated assemblage comparisons that were more extreme than the observed differences (i.e., type I error rate).
Design
- Source data
- Field
- Study type
- Observation
- Study design
- Control/reference vs. treatment/impact (no before)
- Number of independent control or reference sampling units
- 1
- Number of indendent impact or treatment sampling units
- 1 control, 1 impact, or 2 control, 2 impact (depending on analysis)
- Sample size used in analysis
- 1?
- Design description
- We blocknetted reaches and collected fishes with 3-pass electrofishing with 2 backpacks at the exposure site and 1 at the reference site.
Context
- Climate
- Temperate
- Country
- United States
- Habitat
- Stream/river
- Spatial extent
- Drainage basin
- Temporal extent
- Other
- Context description
- Temporal extent was snapshot or years (depending on analysis)