CSEMP assessment of BD153 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 | 60.61 | 65.11 | -27.31 | 54.61 | |||
linear | 2 | 62.49 | 73.16 | -27.25 | 54.49 | 0.119 | 1 | 0.7300 |
smooth (df = 2) | 3 | 62.04 | 87.04 | -26.02 | 52.04 | 2.450 | 1 | 0.1175 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2009 | 2018 | -2.7786 | -2.5964 | 0.1822 | 0.5138 | 0.355 | 0.7374 |
last 20 years | 2009 | 2018 | -2.7786 | -2.5964 | 0.1822 | 0.5138 | 0.355 | 0.7374 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.1 | 0.0 | -0.399 | 0.287 | -1.393 | 0.8888 |
FEQG | 0.1 | 1100.0 | 9.599 | 0.287 | 33.489 | <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 : BD153
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 : BD153
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020