CSEMP assessment of copper 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 | 0.70 | 3.70 | 2.65 | -5.30 | | | |
| linear | 2 | 0.69 | 7.09 | 3.65 | -7.31 | 2.006 | 1 | 0.1566 |
| smooth (df = 2) | 3 | 0.67 | 13.17 | 4.66 | -9.33 | 2.021 | 1 | 0.1551 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2002 | 2017 | 7.107 | 7.684 | 0.5776 | 0.3851 | 1.500 | 0.1774 |
| last 20 years | 2002 | 2017 | 7.107 | 7.684 | 0.5776 | 0.3851 | 1.500 | 0.1774 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 2174.1 | 978.0 | -0.7989 | 0.2259 | -3.537 | 0.9952 |
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
