CSEMP assessment of zinc 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 | -8.54 | -6.54 | 7.27 | -14.54 | | | |
| linear | 2 | -6.71 | -2.71 | 7.35 | -14.71 | 0.168 | 1 | 0.6821 |
| smooth (df = 2) | 3 | -14.52 | -7.38 | 12.26 | -24.52 | 9.812 | 1 | 0.0017 |
| smooth (df = 3) | 4 | -19.37 | -7.37 | 15.68 | -31.37 | 6.848 | 1 | 0.0089 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 10.770 | 10.606 | -0.16354 | 0.15230 | -1.074 | 0.3109 |
| last 20 years | 2000 | 2018 | 10.770 | 10.606 | -0.16354 | 0.15230 | -1.074 | 0.3109 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 40390 | 10269 | -1.3694 | 0.1085 | -12.620 | 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
