CSEMP assessment of cadmium in biota at Crosby (Mersey Channel)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -22.98 | -20.73 | 14.49 | -28.98 | | | |
| linear | 2 | -22.41 | -17.84 | 15.20 | -30.41 | 1.424 | 1 | 0.2328 |
| smooth (df = 2) | 3 | -22.25 | -13.91 | 16.12 | -32.25 | 1.838 | 1 | 0.1752 |
| smooth (df = 3) | 4 | -23.48 | -9.08 | 17.74 | -35.48 | 3.235 | 1 | 0.0721 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 6.184 | 5.942 | -0.24175 | 0.19709 | -1.227 | 0.2511 |
| last 20 years | 2000 | 2017 | 6.184 | 5.942 | -0.24175 | 0.19709 | -1.227 | 0.2511 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 380.6 | 156.5 | -0.8888 | 0.1161 | -7.653 | 1.0000 |
| EC | 380.6 | 1000.0 | 0.9660 | 0.1161 | 8.317 | <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
