CSEMP assessment of zinc in sediment at Sea of Hebrides
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -38.52 | -36.27 | 22.26 | -44.52 | | | |
| linear | 2 | -36.92 | -32.35 | 22.46 | -44.92 | 0.401 | 1 | 0.5265 |
| smooth (df = 2) | 3 | -39.08 | -30.74 | 24.54 | -49.08 | 4.159 | 1 | 0.0414 |
| smooth (df = 3) | 4 | -37.57 | -23.17 | 24.79 | -49.57 | 0.495 | 1 | 0.4816 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2016 | 4.610 | 4.493 | -0.11662 | 0.18238 | -0.639 | 0.5385 |
| last 20 years | 2006 | 2016 | 4.610 | 4.493 | -0.11662 | 0.18238 | -0.639 | 0.5385 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 89.39 | 122.00 | 0.3110 | 0.1057 | 2.942 | 0.0082 |
| ERL | 89.39 | 150.00 | 0.5176 | 0.1057 | 4.897 | 0.0004 |
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
