CSEMP assessment of BDE99 in sediment at middle (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 50.20 | 54.70 | -22.10 | 44.20 | |||
linear | 2 | 52.18 | 62.85 | -22.09 | 44.18 | 0.014 | 1 | 0.9045 |
smooth (df = 2) | 3 | 54.18 | 79.18 | -22.09 | 44.18 | 0.002 | 1 | 0.9638 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2009 | 2018 | -1.5512 | -1.5199 | 0.03132 | 0.26070 | 0.120 | 0.9090 |
last 20 years | 2009 | 2018 | -1.5512 | -1.5199 | 0.03132 | 0.26070 | 0.120 | 0.9090 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.2187 | 0.0500 | -1.4759 | 0.1500 | -9.838 | 0.9999 |
FEQG | 0.2187 | 1.0000 | 1.5199 | 0.1500 | 10.131 | <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 : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : BDE99
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : BDE99
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020