CSEMP assessment of benzo[a]anthracene in biota at Mostyn Bank (Dee)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 62.06 | 65.66 | -28.03 | 56.06 | |||
linear | 2 | 55.52 | 63.52 | -23.76 | 47.52 | 8.541 | 1 | 0.0035 |
smooth (df = 2) | 3 | 56.07 | 72.74 | -23.04 | 46.07 | 1.449 | 1 | 0.2287 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2003 | 2018 | 0.8908 | -1.0352 | -1.9260 | 0.5076 | -3.794 | 0.0090 |
last 20 years | 2003 | 2018 | 0.8908 | -1.0352 | -1.9260 | 0.5076 | -3.794 | 0.0090 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.355 | 0.408 | 0.137 | 0.334 | 0.412 | 0.3474 |
EAC | 0.355 | 13.040 | 3.603 | 0.334 | 10.795 | <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_DeeNWales_sh01, Mostyn Bank (Dee)
Determinand : Benzo[a]anthracene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_DeeNWales_sh01, Mostyn Bank (Dee)
Determinand : Benzo[a]anthracene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020