CSEMP assessment of cadmium 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 | 25.84 | 27.64 | -9.92 | 19.84 | | | |
| linear | 2 | 25.27 | 28.83 | -8.64 | 17.27 | 2.568 | 1 | 0.1090 |
| smooth (df = 2) | 3 | 26.92 | 33.17 | -8.46 | 16.92 | 0.357 | 1 | 0.5501 |
| smooth (df = 3) | 4 | 28.26 | 38.55 | -8.13 | 16.26 | 0.653 | 1 | 0.4192 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2015 | 5.646 | 5.226 | -0.4206 | 0.2497 | -1.684 | 0.1203 |
| last 20 years | 1999 | 2015 | 5.646 | 5.226 | -0.4206 | 0.2497 | -1.684 | 0.1203 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 186.0 | 156.5 | -0.1730 | 0.1623 | -1.066 | 0.8453 |
| EC | 186.0 | 1000.0 | 1.6819 | 0.1623 | 10.364 | <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
