CSEMP assessment of lead in biota at MiddleBankM
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 0.73 | 3.13 | 1.63 | -3.27 | | | |
| linear | 2 | -0.97 | 5.03 | 3.48 | -6.97 | 3.703 | 1 | 0.0543 |
| smooth (df = 2) | 3 | -1.08 | 12.25 | 4.54 | -9.08 | 2.110 | 1 | 0.1463 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2011 | 2018 | 6.684 | 6.317 | -0.3669 | 0.1691 | -2.170 | 0.0731 |
| last 20 years | 2011 | 2018 | 6.684 | 6.317 | -0.3669 | 0.1691 | -2.170 | 0.0731 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 553.9 | 211.9 | -0.9608 | 0.1011 | -9.508 | 1.0000 |
| EC | 553.9 | 1500.0 | 0.9963 | 0.1011 | 9.859 | <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 biota
- Accessment criteria for metals in biota
