CSEMP assessment of lead in biota at Conwy Sands (Conwy Bay)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | -8.49 | 0.51 | 7.25 | -14.49 | |||
linear | 2 | -6.92 | 25.08 | 7.46 | -14.92 | 0.422 | 1 | 0.5162 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2012 | 2018 | 6.083 | 6.011 | -0.07136 | 0.10895 | -0.655 | 0.5592 |
last 20 years | 2012 | 2018 | 6.083 | 6.011 | -0.07136 | 0.10895 | -0.655 | 0.5592 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 408.0 | 211.9 | -0.6551 | 0.0742 | -8.828 | 0.9985 |
EC | 408.0 | 1500.0 | 1.3020 | 0.0742 | 17.545 | 0.0002 |
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
Media : Biota (Blue mussel soft body)
Station : IrishSea_Conwy_sh02, Conwy Sands (Conwy Bay)
Determinand : Lead
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_Conwy_sh02, Conwy Sands (Conwy Bay)
Determinand : Lead
Units : μg kg-1 wet weight
Data extraction : 30 April 2020