CSEMP assessment of zinc 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 | -3.90 | -1.33 | 4.95 | -9.90 | | | |
| linear | 2 | -3.05 | 2.28 | 5.53 | -11.05 | 1.149 | 1 | 0.2838 |
| smooth (df = 2) | 3 | -4.17 | 5.83 | 7.08 | -14.17 | 3.116 | 1 | 0.0775 |
| smooth (df = 3) | 4 | -6.53 | 11.47 | 9.26 | -18.53 | 4.359 | 1 | 0.0368 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2002 | 2018 | 10.187 | 10.039 | -0.14831 | 0.13499 | -1.099 | 0.3039 |
| last 20 years | 2002 | 2018 | 10.187 | 10.039 | -0.14831 | 0.13499 | -1.099 | 0.3039 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 22893 | 10269 | -0.8017 | 0.0767 | -10.455 | 1.0000 |
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
