CSEMP assessment of zinc 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 | -6.82 | -5.02 | 6.41 | -12.82 | |||
linear | 2 | -4.98 | -1.42 | 6.49 | -12.98 | 0.154 | 1 | 0.6952 |
smooth (df = 2) | 3 | -3.50 | 2.75 | 6.75 | -13.50 | 0.526 | 1 | 0.4682 |
smooth (df = 3) | 4 | -1.54 | 8.75 | 6.77 | -13.54 | 0.034 | 1 | 0.8540 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2015 | 9.661 | 9.739 | 0.07744 | 0.19708 | 0.393 | 0.7019 |
last 20 years | 1999 | 2015 | 9.661 | 9.739 | 0.07744 | 0.19708 | 0.393 | 0.7019 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 16965 | 10269 | -0.5020 | 0.1291 | -3.889 | 0.9987 |
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 : Zinc
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_MorecambeBay_sh01, Roa Island (Morecambe Bay)
Determinand : Zinc
Units : μg kg-1 wet weight
Data extraction : 30 April 2020