CSEMP assessment of copper in sediment at Sea of Hebrides
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -12.46 | -10.21 | 9.23 | -18.46 | | | |
| linear | 2 | -10.93 | -6.36 | 9.47 | -18.93 | 0.473 | 1 | 0.4918 |
| smooth (df = 2) | 3 | -12.40 | -4.07 | 11.20 | -22.40 | 3.468 | 1 | 0.0626 |
| smooth (df = 3) | 4 | -11.32 | 3.08 | 11.66 | -23.32 | 0.921 | 1 | 0.3373 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2016 | 2.8625 | 2.7245 | -0.13800 | 0.19874 | -0.694 | 0.5050 |
| last 20 years | 2006 | 2016 | 2.8625 | 2.7245 | -0.13800 | 0.19874 | -0.694 | 0.5050 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 15.25 | 27.00 | 0.5713 | 0.1158 | 4.935 | 0.0004 |
| ERL | 15.25 | 34.00 | 0.8019 | 0.1158 | 6.927 | <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
