CSEMP assessment of pyrene 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 | 18.76 | 23.26 | -6.38 | 12.76 | |||
linear | 2 | 19.59 | 30.26 | -5.80 | 11.59 | 1.166 | 1 | 0.2803 |
smooth (df = 2) | 3 | 21.36 | 46.36 | -5.68 | 11.36 | 0.232 | 1 | 0.6300 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2002 | 2015 | 1.8695 | 1.3644 | -0.5051 | 0.4514 | -1.119 | 0.3140 |
last 20 years | 2002 | 2015 | 1.8695 | 1.3644 | -0.5051 | 0.4514 | -1.119 | 0.3140 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 3.913 | 1.467 | -0.9812 | 0.3377 | -2.906 | 0.9832 |
EAC | 3.913 | 16.300 | 1.4268 | 0.3377 | 4.225 | 0.0041 |
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (parent) data
PAH (parent) assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for pah_(parent) in biota
- Accessment criteria for pah_(parent) in biota
Media : Biota (Blue mussel soft body)
Station : IrishSea_MorecambeBay_sh01, Roa Island (Morecambe Bay)
Determinand : Pyrene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020
Station : IrishSea_MorecambeBay_sh01, Roa Island (Morecambe Bay)
Determinand : Pyrene
Units : μg kg-1 wet weight
Data extraction : 30 April 2020