CSEMP assessment of mercury in sediment at Forth Estuary
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 95.84 | 97.04 | -44.92 | 89.84 | | | |
| linear | 2 | 95.83 | 98.12 | -43.92 | 87.83 | 2.006 | 1 | 0.1567 |
| smooth (df = 2) | 3 | 96.98 | 100.83 | -43.49 | 86.98 | 0.850 | 1 | 0.3565 |
| smooth (df = 3) | 4 | 98.58 | 104.58 | -43.29 | 86.58 | 0.399 | 1 | 0.5275 |
| smooth (df = 4) | 5 | 99.69 | 108.59 | -42.84 | 85.69 | 0.898 | 1 | 0.3432 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | -0.2139 | -0.6779 | -0.4640 | 0.3142 | -1.477 | 0.1591 |
| last 20 years | 2000 | 2017 | -0.2139 | -0.6779 | -0.4640 | 0.3142 | -1.477 | 0.1591 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.5077 | 0.0700 | -1.9813 | 0.1851 | -10.703 | 1.0000 |
| ERL | 0.5077 | 0.1500 | -1.2192 | 0.1851 | -6.586 | 1.0000 |
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
