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 |
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for in sediment
- Accessment criteria for 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