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 | 79.44 | 82.02 | -36.72 | 73.44 | | | |
| linear | 2 | 78.79 | 84.12 | -35.40 | 70.79 | 2.654 | 1 | 0.1033 |
| smooth (df = 2) | 3 | 80.64 | 90.64 | -35.32 | 70.64 | 0.153 | 1 | 0.6959 |
| smooth (df = 3) | 4 | 82.03 | 100.03 | -35.02 | 70.03 | 0.603 | 1 | 0.4373 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2007 | 2018 | -2.774 | -3.523 | -0.7497 | 0.4304 | -1.742 | 0.1197 |
| last 20 years | 2007 | 2018 | -2.774 | -3.523 | -0.7497 | 0.4304 | -1.742 | 0.1197 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.0295 | 0.0700 | 0.8641 | 0.2732 | 3.163 | 0.0067 |
| ERL | 0.0295 | 0.1500 | 1.6263 | 0.2732 | 5.953 | 0.0002 |
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
