CSEMP assessment of BDE99 in sediment at Hunterston (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 132.88 | 135.45 | -63.44 | 126.88 | |||
linear | 2 | 126.33 | 131.66 | -59.16 | 118.33 | 8.553 | 1 | 0.0034 |
smooth (df = 2) | 3 | 128.25 | 138.25 | -59.12 | 118.25 | 0.080 | 1 | 0.7767 |
smooth (df = 3) | 4 | 130.12 | 148.12 | -59.06 | 118.12 | 0.128 | 1 | 0.7207 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2009 | 2018 | 0.5944 | -1.1073 | -1.7017 | 0.4849 | -3.510 | 0.0080 |
last 20 years | 2009 | 2018 | 0.5944 | -1.1073 | -1.7017 | 0.4849 | -3.510 | 0.0080 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.3305 | 0.0500 | -1.8884 | 0.2673 | -7.065 | 0.9999 |
FEQG | 0.3305 | 1.0000 | 1.1073 | 0.2673 | 4.142 | 0.0016 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for organo-bromines in sediment
- Accessment criteria for organo-bromines in sediment
Media : Sediment (unsieved)
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : BDE99
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : BDE99
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020