CSEMP assessment of nickel 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 | -1.05 | 0.95 | 3.53 | -7.05 | | | |
| linear | 2 | -2.94 | 1.06 | 5.47 | -10.94 | 3.886 | 1 | 0.0487 |
| smooth (df = 2) | 3 | -1.83 | 5.31 | 5.92 | -11.83 | 0.893 | 1 | 0.3446 |
| smooth (df = 3) | 4 | -0.01 | 11.99 | 6.00 | -12.01 | 0.174 | 1 | 0.6769 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2003 | 2018 | 3.650 | 3.119 | -0.5310 | 0.2486 | -2.136 | 0.0584 |
| last 20 years | 2003 | 2018 | 3.650 | 3.119 | -0.5310 | 0.2486 | -2.136 | 0.0584 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 22.63 | 36.00 | 0.4641 | 0.1358 | 3.418 | 0.0033 |
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
