CSEMP assessment of cadmium in sediment at Solway Firth
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 80.36 | 82.61 | -37.18 | 74.36 | | | |
| linear | 2 | 82.31 | 86.88 | -37.16 | 74.31 | 0.051 | 1 | 0.8211 |
| smooth (df = 2) | 3 | 75.04 | 83.37 | -32.52 | 65.04 | 9.271 | 1 | 0.0023 |
| smooth (df = 3) | 4 | 75.64 | 90.04 | -31.82 | 63.64 | 1.401 | 1 | 0.2365 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2003 | 2017 | -1.9421 | -2.0360 | -0.0939 | 0.4106 | -0.229 | 0.8241 |
| last 20 years | 2003 | 2017 | -1.9421 | -2.0360 | -0.0939 | 0.4106 | -0.229 | 0.8241 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.1305 | 0.3100 | 0.8648 | 0.2360 | 3.665 | 0.0026 |
| ERL | 0.1305 | 1.2000 | 2.2183 | 0.2360 | 9.401 | <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
