CSEMP assessment of chrysene 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 | 54.76 | 58.36 | -24.38 | 48.76 | |||
linear | 2 | 50.72 | 58.72 | -21.36 | 42.72 | 6.049 | 1 | 0.0139 |
smooth (df = 2) | 3 | 51.15 | 67.82 | -20.58 | 41.15 | 1.564 | 1 | 0.2110 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2018 | 2.0429 | -0.4729 | -2.5158 | 0.8479 | -2.967 | 0.0251 |
last 20 years | 1999 | 2018 | 2.0429 | -0.4729 | -2.5158 | 0.8479 | -2.967 | 0.0251 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.6232 | 1.3203 | 0.7507 | 0.4889 | 1.536 | 0.0878 |
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 : Chrysene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_DeeNWales_sh01, Mostyn Bank (Dee)
Determinand : Chrysene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020