CSEMP assessment of benzo[a]pyrene in sediment at Fladen Ground
Statistical analysis
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 48.86 | 51.43 | -21.43 | 42.86 | |||
| linear | 2 | 49.61 | 54.94 | -20.81 | 41.61 | 1.249 | 1 | 0.2637 |
| smooth (df = 2) | 3 | 51.13 | 61.13 | -20.56 | 41.13 | 0.481 | 1 | 0.4879 |
| smooth (df = 3) | 4 | 52.71 | 70.71 | -20.36 | 40.71 | 0.417 | 1 | 0.5186 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2005 | 2018 | 1.9839 | 2.5818 | 0.5979 | 0.5185 | 1.153 | 0.2822 |
| last 20 years | 2005 | 2018 | 1.9839 | 2.5818 | 0.5979 | 0.5185 | 1.153 | 0.2822 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 13.2 | 30.0 | 0.819 | 0.359 | 2.285 | 0.0258 |
| ERL | 13.2 | 430.0 | 3.482 | 0.359 | 9.712 | <0.0001 |
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for in sediment
- Accessment criteria for in sediment
Media : Sediment (unsieved)
Station : Fladen_FlaOpenSea_se02 (Fladen Ground)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Fladen_FlaOpenSea_se02 (Fladen Ground)
Determinand : Benzo[a]pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020