CSEMP assessment of phenanthrene in biota at New Brighton (Mersey)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 26.00 | 30.50 | -10.00 | 20.00 | |||
linear | 2 | 27.80 | 38.47 | -9.90 | 19.80 | 0.199 | 1 | 0.6559 |
smooth (df = 2) | 3 | 25.41 | 50.41 | -7.70 | 15.41 | 4.397 | 1 | 0.0360 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2002 | 2018 | 0.9996 | 1.3299 | 0.3303 | 0.7381 | 0.447 | 0.6733 |
last 20 years | 2002 | 2018 | 0.9996 | 1.3299 | 0.3303 | 0.7381 | 0.447 | 0.6733 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 3.78 | 1.79 | -0.746 | 0.430 | -1.734 | 0.9283 |
EAC | 3.78 | 277.10 | 4.294 | 0.430 | 9.982 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (parent) data
PAH (parent) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(parent) in biota
- Accessment criteria for pah_(parent) in biota
Media : Biota (Blue mussel soft body)
Station : IrishSea_Mersey_sh01, New Brighton (Mersey)
Determinand : Phenanthrene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_Mersey_sh01, New Brighton (Mersey)
Determinand : Phenanthrene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020