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 | -15.11 | -13.11 | 10.55 | -21.11 | | | |
| linear | 2 | -13.12 | -9.12 | 10.56 | -21.12 | 0.007 | 1 | 0.9316 |
| smooth (df = 2) | 3 | -11.53 | -4.39 | 10.77 | -21.53 | 0.417 | 1 | 0.5187 |
| smooth (df = 3) | 4 | -14.07 | -2.07 | 13.04 | -26.07 | 4.537 | 1 | 0.0332 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2017 | 2.8204 | 2.8036 | -0.01681 | 0.19558 | -0.086 | 0.9332 |
| last 20 years | 2006 | 2017 | 2.8204 | 2.8036 | -0.01681 | 0.19558 | -0.086 | 0.9332 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 16.5 | 27.0 | 0.4922 | 0.1137 | 4.329 | 0.0007 |
| ERL | 16.5 | 34.0 | 0.7228 | 0.1137 | 6.356 | <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
