CSEMP assessment of pyrene in sediment at Lough Foyle
Statistical analysis
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 122.90 | 124.90 | -58.45 | 116.90 | |||
| linear | 2 | 118.39 | 122.39 | -55.19 | 110.39 | 6.514 | 1 | 0.0107 |
| smooth (df = 2) | 3 | 109.48 | 116.62 | -49.74 | 99.48 | 10.907 | 1 | 0.0010 |
| smooth (df = 3) | 4 | 110.96 | 122.96 | -49.48 | 98.96 | 0.519 | 1 | 0.4714 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2000 | 2018 | 6.002 | 4.257 | -1.7454 | 0.3915 | -4.458 | 0.0016 |
| last 20 years | 2000 | 2018 | 6.002 | 4.257 | -1.7454 | 0.3915 | -4.458 | 0.0016 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 70.6 | 24.0 | -1.0788 | 0.2845 | -3.792 | 0.9979 |
| ERL | 70.6 | 665.0 | 2.2429 | 0.2845 | 7.884 | <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 (< 63 micron fraction)
Station : MinchMalin_FoyleFaughanE_se01 (Lough Foyle)
Determinand : Pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : MinchMalin_FoyleFaughanE_se01 (Lough Foyle)
Determinand : Pyrene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020