CSEMP assessment of zinc in biota at Roa Island (Morecambe Bay)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -6.82 | -5.02 | 6.41 | -12.82 | | | |
| linear | 2 | -4.98 | -1.42 | 6.49 | -12.98 | 0.154 | 1 | 0.6952 |
| smooth (df = 2) | 3 | -3.50 | 2.75 | 6.75 | -13.50 | 0.526 | 1 | 0.4682 |
| smooth (df = 3) | 4 | -1.54 | 8.75 | 6.77 | -13.54 | 0.034 | 1 | 0.8540 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2015 | 9.661 | 9.739 | 0.07744 | 0.19708 | 0.393 | 0.7019 |
| last 20 years | 1999 | 2015 | 9.661 | 9.739 | 0.07744 | 0.19708 | 0.393 | 0.7019 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 16965 | 10269 | -0.5020 | 0.1291 | -3.889 | 0.9987 |
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
