CSEMP assessment of BD153 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 | 111.18 | 113.43 | -52.59 | 105.18 | |||
linear | 2 | 109.61 | 114.18 | -50.80 | 101.61 | 3.569 | 1 | 0.0589 |
smooth (df = 2) | 3 | 111.61 | 119.94 | -50.80 | 101.61 | 0.001 | 1 | 0.9756 |
smooth (df = 3) | 4 | 113.59 | 127.99 | -50.79 | 101.59 | 0.021 | 1 | 0.8846 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2008 | 2018 | -1.1716 | -1.9625 | -0.7909 | 0.3993 | -1.981 | 0.0789 |
last 20 years | 2008 | 2018 | -1.1716 | -1.9625 | -0.7909 | 0.3993 | -1.981 | 0.0789 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.1 | 0.0 | -1.033 | 0.215 | -4.808 | 0.9995 |
FEQG | 0.1 | 1100.0 | 8.966 | 0.215 | 41.718 | <0.0001 |
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 : BD153
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : BD153
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020