CSEMP assessment of cadmium 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 | 79.17 | 80.67 | -36.58 | 73.17 | |||
linear | 2 | 80.79 | 83.70 | -36.40 | 72.79 | 0.377 | 1 | 0.5391 |
smooth (df = 2) | 3 | 79.54 | 84.54 | -34.77 | 69.54 | 3.256 | 1 | 0.0711 |
smooth (df = 3) | 4 | 74.55 | 82.55 | -31.28 | 62.55 | 6.984 | 1 | 0.0082 |
smooth (df = 4) | 5 | 74.79 | 87.04 | -30.40 | 60.79 | 1.759 | 1 | 0.1848 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2016 | -1.7611 | -1.5754 | 0.18565 | 0.30244 | 0.614 | 0.5499 |
last 20 years | 2000 | 2016 | -1.7611 | -1.5754 | 0.18565 | 0.30244 | 0.614 | 0.5499 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.2069 | 0.3100 | 0.4043 | 0.1710 | 2.364 | 0.0172 |
ERL | 0.2069 | 1.2000 | 1.7578 | 0.1710 | 10.279 | <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 (< 63 micron fraction)
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Cadmium
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 : Cadmium
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020