CSEMP assessment of cadmium in biota at Roa Island (Morecambe Bay)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 25.84 | 27.64 | -9.92 | 19.84 | |||
linear | 2 | 25.27 | 28.83 | -8.64 | 17.27 | 2.568 | 1 | 0.1090 |
smooth (df = 2) | 3 | 26.92 | 33.17 | -8.46 | 16.92 | 0.357 | 1 | 0.5501 |
smooth (df = 3) | 4 | 28.26 | 38.55 | -8.13 | 16.26 | 0.653 | 1 | 0.4192 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2015 | 5.646 | 5.226 | -0.4206 | 0.2497 | -1.684 | 0.1203 |
last 20 years | 1999 | 2015 | 5.646 | 5.226 | -0.4206 | 0.2497 | -1.684 | 0.1203 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 186.0 | 156.5 | -0.1730 | 0.1623 | -1.066 | 0.8453 |
EC | 186.0 | 1000.0 | 1.6819 | 0.1623 | 10.364 | <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
Media : Biota (Blue mussel soft body)
Station : IrishSea_MorecambeBay_sh01, Roa Island (Morecambe Bay)
Determinand : Cadmium
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_MorecambeBay_sh01, Roa Island (Morecambe Bay)
Determinand : Cadmium
Units : μg kg-1 wet weight
Data extraction : 30 April 2020