CSEMP assessment of lead in biota at Mostyn Bank (Dee)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 14.17 | 16.42 | -4.09 | 8.17 | | | |
| linear | 2 | 12.45 | 17.02 | -2.23 | 4.45 | 3.723 | 1 | 0.0537 |
| smooth (df = 2) | 3 | 14.45 | 22.78 | -2.22 | 4.45 | 0.005 | 1 | 0.9425 |
| smooth (df = 3) | 4 | 15.86 | 30.26 | -1.93 | 3.86 | 0.587 | 1 | 0.4434 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2015 | 7.235 | 6.614 | -0.6213 | 0.2946 | -2.109 | 0.0642 |
| last 20 years | 1999 | 2015 | 7.235 | 6.614 | -0.6213 | 0.2946 | -2.109 | 0.0642 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 745.1 | 211.9 | -1.2575 | 0.1841 | -6.831 | 1.0000 |
| EC | 745.1 | 1500.0 | 0.6997 | 0.1841 | 3.801 | 0.0021 |
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
