CSEMP assessment of CB153 in sediment at middle (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 66.68 | 68.48 | -30.34 | 60.68 | |||
| linear | 2 | 62.01 | 65.57 | -27.01 | 54.01 | 6.674 | 1 | 0.0098 |
| smooth (df = 2) | 3 | 56.13 | 62.38 | -23.07 | 46.13 | 7.878 | 1 | 0.0050 |
| smooth (df = 3) | 4 | 57.93 | 68.22 | -22.96 | 45.93 | 0.203 | 1 | 0.6525 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2006 | 2018 | -0.8182 | -0.1850 | 0.6331 | 0.1699 | 3.726 | 0.0039 |
| last 20 years | 2006 | 2018 | -0.8182 | -0.1850 | 0.6331 | 0.1699 | 3.726 | 0.0039 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 0.83 | 0.19 | -1.476 | 0.132 | -11.164 | 1.0000 |
| EAC | 0.83 | 40.00 | 3.874 | 0.132 | 29.307 | <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 : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : CB153
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : CB153
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020