CSEMP assessment of lead in biota at Camarthen Bay
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 66.69 | 69.26 | -30.34 | 60.69 | | | |
| linear | 2 | 68.53 | 73.86 | -30.27 | 60.53 | 0.157 | 1 | 0.6923 |
| smooth (df = 2) | 3 | 66.98 | 76.98 | -28.49 | 56.98 | 3.551 | 1 | 0.0595 |
| smooth (df = 3) | 4 | 68.93 | 86.93 | -28.46 | 56.93 | 0.051 | 1 | 0.8213 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2003 | 2018 | 4.870 | 5.001 | 0.1308 | 0.3296 | 0.397 | 0.7019 |
| last 20 years | 2003 | 2018 | 4.870 | 5.001 | 0.1308 | 0.3296 | 0.397 | 0.7019 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 148.6 | 26.0 | -1.7429 | 0.2218 | -7.857 | 1.0000 |
| EC | 148.6 | 1500.0 | 2.3122 | 0.2218 | 10.424 | <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 biota
- Accessment criteria for metals in biota
