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 | 37.99 | 40.24 | -15.99 | 31.99 | | | |
| linear | 2 | 37.88 | 42.46 | -14.94 | 29.88 | 2.105 | 1 | 0.1468 |
| smooth (df = 2) | 3 | 39.60 | 47.93 | -14.80 | 29.60 | 0.289 | 1 | 0.5910 |
| smooth (df = 3) | 4 | 41.55 | 55.95 | -14.78 | 29.55 | 0.040 | 1 | 0.8409 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2018 | -2.949 | -3.330 | -0.3814 | 0.2496 | -1.528 | 0.1610 |
| last 20 years | 2006 | 2018 | -2.949 | -3.330 | -0.3814 | 0.2496 | -1.528 | 0.1610 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.03578 | 0.07000 | 0.6711 | 0.1564 | 4.291 | 0.0010 |
| ERL | 0.03578 | 0.15000 | 1.4332 | 0.1564 | 9.164 | <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
