CSEMP assessment of cadmium in sediment at Lough Foyle
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 23.37 | 25.62 | -8.69 | 17.37 | | | |
| linear | 2 | 22.69 | 27.26 | -7.34 | 14.69 | 2.686 | 1 | 0.1013 |
| smooth (df = 2) | 3 | 24.66 | 32.99 | -7.33 | 14.66 | 0.028 | 1 | 0.8674 |
| smooth (df = 3) | 4 | 26.54 | 40.94 | -7.27 | 14.54 | 0.121 | 1 | 0.7277 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2003 | 2018 | -1.3180 | -1.9168 | -0.5987 | 0.3436 | -1.743 | 0.1154 |
| last 20 years | 2003 | 2018 | -1.3180 | -1.9168 | -0.5987 | 0.3436 | -1.743 | 0.1154 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.1471 | 0.3100 | 0.7456 | 0.1835 | 4.063 | 0.0014 |
| ERL | 0.1471 | 1.2000 | 2.0991 | 0.1835 | 11.438 | <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 sediment
- Accessment criteria for metals in sediment
