CSEMP assessment of benzo[a]anthracene 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 | 26.47 | 30.97 | -10.23 | 20.47 | |||
linear | 2 | 27.67 | 38.33 | -9.83 | 19.67 | 0.801 | 1 | 0.3706 |
smooth (df = 2) | 3 | 25.12 | 50.12 | -7.56 | 15.12 | 4.546 | 1 | 0.0330 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2002 | 2018 | 2.1642 | 1.2089 | -0.9553 | 1.0336 | -0.924 | 0.3977 |
last 20 years | 2002 | 2018 | 2.1642 | 1.2089 | -0.9553 | 1.0336 | -0.924 | 0.3977 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 3.350 | 0.408 | -2.1066 | 0.6099 | -3.454 | 0.9909 |
EAC | 3.350 | 13.040 | 1.3591 | 0.6099 | 2.229 | 0.0381 |
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]anthracene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_LiverpoolBay_sh01, Crosby (Mersey Channel)
Determinand : Benzo[a]anthracene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020