CSEMP assessment of mercury in sediment at Bann Estuary
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 38.20 | 40.77 | -16.10 | 32.20 | | | |
| linear | 2 | 38.29 | 43.62 | -15.15 | 30.29 | 1.911 | 1 | 0.1669 |
| smooth (df = 2) | 3 | 40.18 | 50.18 | -15.09 | 30.18 | 0.109 | 1 | 0.7416 |
| smooth (df = 3) | 4 | 42.12 | 60.12 | -15.06 | 30.12 | 0.060 | 1 | 0.8062 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2017 | -2.928 | -3.348 | -0.4205 | 0.2890 | -1.455 | 0.1837 |
| last 20 years | 2006 | 2017 | -2.928 | -3.348 | -0.4205 | 0.2890 | -1.455 | 0.1837 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.03515 | 0.07000 | 0.6888 | 0.1841 | 3.742 | 0.0028 |
| ERL | 0.03515 | 0.15000 | 1.4510 | 0.1841 | 7.882 | <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
