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 | 5.53 | 8.53 | 0.24 | -0.47 | | | |
| linear | 2 | -4.70 | 1.70 | 6.35 | -12.70 | 12.231 | 1 | 0.0005 |
| smooth (df = 2) | 3 | -3.88 | 8.62 | 6.94 | -13.88 | 1.178 | 1 | 0.2777 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2002 | 2017 | 5.972 | 5.414 | -0.5574 | 0.1036 | -5.381 | 0.0010 |
| last 20 years | 2002 | 2017 | 5.972 | 5.414 | -0.5574 | 0.1036 | -5.381 | 0.0010 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 224.6 | 156.5 | -0.3615 | 0.0607 | -5.958 | 0.9997 |
| EC | 224.6 | 1000.0 | 1.4933 | 0.0607 | 24.610 | <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
