CSEMP assessment of nickel in sediment at inner (Firth of Forth)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | -41.79 | -40.59 | 23.89 | -47.79 | |||
linear | 2 | -39.80 | -37.52 | 23.90 | -47.80 | 0.014 | 1 | 0.9061 |
smooth (df = 2) | 3 | -38.55 | -34.71 | 24.28 | -48.55 | 0.754 | 1 | 0.3852 |
smooth (df = 3) | 4 | -41.87 | -35.87 | 26.93 | -53.87 | 5.312 | 1 | 0.0212 |
smooth (df = 4) | 5 | -39.95 | -31.04 | 26.97 | -53.95 | 0.080 | 1 | 0.7770 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2016 | 3.458 | 3.473 | 0.01471 | 0.12353 | 0.119 | 0.9067 |
last 20 years | 1999 | 2016 | 3.458 | 3.473 | 0.01471 | 0.12353 | 0.119 | 0.9067 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 32.24 | 36.00 | 0.11036 | 0.06578 | 1.678 | 0.0564 |
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_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : Nickel
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020
Station : Firth_of_Forth_(inner)_seSF, inner (Firth of Forth)
Determinand : Nickel
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020