CSEMP assessment of mercury 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 | 73.49 | 76.49 | -33.74 | 67.49 | | | |
| linear | 2 | 74.82 | 81.22 | -33.41 | 66.82 | 0.663 | 1 | 0.4155 |
| smooth (df = 2) | 3 | 76.75 | 89.25 | -33.38 | 66.75 | 0.069 | 1 | 0.7922 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2007 | 2017 | -2.857 | -3.256 | -0.3994 | 0.4816 | -0.829 | 0.4344 |
| last 20 years | 2007 | 2017 | -2.857 | -3.256 | -0.3994 | 0.4816 | -0.829 | 0.4344 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.03853 | 0.07000 | 0.5970 | 0.3112 | 1.918 | 0.0483 |
| ERL | 0.03853 | 0.15000 | 1.3591 | 0.3112 | 4.367 | 0.0016 |
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
