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 | 70.34 | 72.91 | -32.17 | 64.34 | | | |
| linear | 2 | 71.78 | 77.11 | -31.89 | 63.78 | 0.559 | 1 | 0.4547 |
| smooth (df = 2) | 3 | 66.41 | 76.41 | -28.20 | 56.41 | 7.371 | 1 | 0.0066 |
| smooth (df = 3) | 4 | 66.84 | 84.84 | -27.42 | 54.84 | 1.566 | 1 | 0.2108 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2003 | 2016 | -1.8622 | -2.1699 | -0.3076 | 0.4020 | -0.765 | 0.4661 |
| last 20 years | 2003 | 2016 | -1.8622 | -2.1699 | -0.3076 | 0.4020 | -0.765 | 0.4661 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.1142 | 0.3100 | 0.9987 | 0.2310 | 4.324 | 0.0013 |
| ERL | 0.1142 | 1.2000 | 2.3522 | 0.2310 | 10.184 | <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
