CSEMP assessment of copper in sediment at outer (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 23.06 | 24.44 | -8.53 | 17.06 | |||
linear | 2 | 8.67 | 11.34 | -0.34 | 0.67 | 16.385 | 1 | <0.0001 |
smooth (df = 2) | 3 | 3.45 | 8.00 | 3.28 | -6.55 | 7.223 | 1 | 0.0072 |
smooth (df = 3) | 4 | 4.28 | 11.48 | 3.86 | -7.72 | 1.166 | 1 | 0.2803 |
smooth (df = 4) | 5 | 5.70 | 16.59 | 4.15 | -8.30 | 0.583 | 1 | 0.4452 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2016 | 3.857 | 2.687 | -1.1695 | 0.1857 | -6.297 | <0.0001 |
last 20 years | 2000 | 2016 | 3.857 | 2.687 | -1.1695 | 0.1857 | -6.297 | <0.0001 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 14.69 | 27.00 | 0.6084 | 0.1573 | 3.867 | 0.0010 |
ERL | 14.69 | 34.00 | 0.8389 | 0.1573 | 5.333 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Metals data
Metals assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for metals in sediment
- Accessment criteria for metals in sediment
Media : Sediment (unsieved)
Station : Firth_of_Clyde_(outer)_seSF, outer (Firth of Clyde)
Determinand : Copper
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(outer)_seSF, outer (Firth of Clyde)
Determinand : Copper
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020