CSEMP assessment of cadmium in biota at New Brighton (Mersey)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 3.02 | 5.60 | 1.49 | -2.98 | | | |
| linear | 2 | -8.14 | -2.81 | 8.07 | -16.14 | 13.165 | 1 | 0.0003 |
| smooth (df = 2) | 3 | -6.33 | 3.67 | 8.17 | -16.33 | 0.193 | 1 | 0.6603 |
| smooth (df = 3) | 4 | -14.16 | 3.84 | 13.08 | -26.16 | 9.830 | 1 | 0.0017 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2002 | 2018 | 5.958 | 5.413 | -0.5453 | 0.1036 | -5.262 | 0.0008 |
| last 20 years | 2002 | 2018 | 5.958 | 5.413 | -0.5453 | 0.1036 | -5.262 | 0.0008 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 224.3 | 156.5 | -0.3602 | 0.0592 | -6.087 | 0.9999 |
| EC | 224.3 | 1000.0 | 1.4947 | 0.0592 | 25.259 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Metals data
Metals assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for metals in biota
- Accessment criteria for metals in biota
