CSEMP assessment of phenanthrene in biota at Crosby (Mersey Channel)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 27.81 | 32.31 | -10.90 | 21.81 | |||
linear | 2 | 29.80 | 40.47 | -10.90 | 21.80 | 0.010 | 1 | 0.9198 |
smooth (df = 2) | 3 | 29.81 | 54.81 | -9.90 | 19.81 | 1.989 | 1 | 0.1585 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2002 | 2018 | 0.9661 | 1.0290 | 0.0629 | 0.6255 | 0.101 | 0.9238 |
last 20 years | 2002 | 2018 | 0.9661 | 1.0290 | 0.0629 | 0.6255 | 0.101 | 0.9238 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 2.80 | 1.79 | -0.445 | 0.363 | -1.227 | 0.8627 |
EAC | 2.80 | 277.10 | 4.595 | 0.363 | 12.665 | <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_LiverpoolBay_sh01, Crosby (Mersey Channel)
Determinand : Phenanthrene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_LiverpoolBay_sh01, Crosby (Mersey Channel)
Determinand : Phenanthrene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020