CSEMP assessment of mercury 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 | 123.65 | 124.85 | -58.83 | 117.65 | |||
linear | 2 | 121.67 | 123.96 | -56.84 | 113.67 | 3.981 | 1 | 0.0460 |
smooth (df = 2) | 3 | 123.64 | 127.49 | -56.82 | 113.64 | 0.031 | 1 | 0.8603 |
smooth (df = 3) | 4 | 124.90 | 130.90 | -56.45 | 112.90 | 0.738 | 1 | 0.3904 |
smooth (df = 4) | 5 | 123.72 | 132.63 | -54.86 | 109.72 | 3.184 | 1 | 0.0743 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 1999 | 2016 | -0.9886 | -1.4468 | -0.4582 | 0.2160 | -2.121 | 0.0499 |
last 20 years | 1999 | 2016 | -0.9886 | -1.4468 | -0.4582 | 0.2160 | -2.121 | 0.0499 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.23532 | 0.07000 | -1.2125 | 0.1249 | -9.705 | 1.0000 |
ERL | 0.23532 | 0.15000 | -0.4503 | 0.1249 | -3.604 | 0.9988 |
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 : Mercury
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 : Mercury
Units : mg kg -1 dry weight normalised to 5% aluminium
Data extraction : 30 April 2020