CSEMP assessment of zinc in sediment at inner (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 38.40 | 39.68 | -16.20 | 32.40 | |||
| linear | 2 | 37.67 | 40.14 | -14.84 | 29.67 | 2.723 | 1 | 0.0989 |
| smooth (df = 2) | 3 | 34.67 | 38.84 | -12.33 | 24.67 | 5.005 | 1 | 0.0253 |
| smooth (df = 3) | 4 | 32.35 | 38.90 | -10.18 | 20.35 | 4.318 | 1 | 0.0377 |
| smooth (df = 4) | 5 | 34.02 | 43.82 | -10.01 | 20.02 | 0.331 | 1 | 0.5651 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 1999 | 2016 | 5.144 | 5.353 | 0.20915 | 0.10816 | 1.934 | 0.0736 |
| last 20 years | 1999 | 2016 | 5.144 | 5.353 | 0.20915 | 0.10816 | 1.934 | 0.0736 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 211.29 | 122.00 | -0.5492 | 0.0895 | -6.134 | 1.0000 |
| ERL | 211.29 | 150.00 | -0.3426 | 0.0895 | -3.826 | 0.9991 |
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 : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Zinc
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Zinc
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020