CSEMP assessment of benzo[a]pyrene 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 | 25.96 | 30.46 | -9.98 | 19.96 | |||
linear | 2 | 27.63 | 38.29 | -9.81 | 19.63 | 0.338 | 1 | 0.5608 |
smooth (df = 2) | 3 | 26.26 | 51.26 | -8.13 | 16.26 | 3.371 | 1 | 0.0664 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2002 | 2018 | 2.1446 | 1.4913 | -0.6533 | 1.1071 | -0.590 | 0.5808 |
last 20 years | 2002 | 2018 | 2.1446 | 1.4913 | -0.6533 | 1.1071 | -0.590 | 0.5808 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 4.44 | 0.23 | -2.9688 | 0.6319 | -4.698 | 0.9973 |
EAC | 4.44 | 97.80 | 3.0916 | 0.6319 | 4.892 | 0.0023 |
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 : Benzo[a]pyrene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_LiverpoolBay_sh01, Crosby (Mersey Channel)
Determinand : Benzo[a]pyrene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020