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 | 56.20 | 58.20 | -25.10 | 50.20 | | | |
| linear | 2 | 57.01 | 61.01 | -24.51 | 49.01 | 1.194 | 1 | 0.2745 |
| smooth (df = 2) | 3 | 57.43 | 64.58 | -23.72 | 47.43 | 1.575 | 1 | 0.2094 |
| smooth (df = 3) | 4 | 57.81 | 69.81 | -22.91 | 45.81 | 1.621 | 1 | 0.2029 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2018 | 7.151 | 6.756 | -0.3953 | 0.3524 | -1.122 | 0.2881 |
| last 20 years | 1999 | 2018 | 7.151 | 6.756 | -0.3953 | 0.3524 | -1.122 | 0.2881 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 858.9 | 211.9 | -1.3995 | 0.2180 | -6.420 | 1.0000 |
| EC | 858.9 | 1500.0 | 0.5576 | 0.2180 | 2.558 | 0.0142 |
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
