CSEMP assessment of zinc in biota at Crosby (Mersey Channel)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -10.74 | -8.49 | 8.37 | -16.74 | | | |
| linear | 2 | -9.56 | -4.98 | 8.78 | -17.56 | 0.820 | 1 | 0.3651 |
| smooth (df = 2) | 3 | -14.74 | -6.40 | 12.37 | -24.74 | 7.180 | 1 | 0.0074 |
| smooth (df = 3) | 4 | -21.62 | -7.22 | 16.81 | -33.62 | 8.880 | 1 | 0.0029 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 10.481 | 10.254 | -0.22664 | 0.24625 | -0.920 | 0.3814 |
| last 20 years | 2000 | 2017 | 10.481 | 10.254 | -0.22664 | 0.24625 | -0.920 | 0.3814 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 28401 | 10269 | -1.0173 | 0.1460 | -6.966 | 1.0000 |
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 biota
- Accessment criteria for metals in biota
