CSEMP assessment of DDE (p,p') in biota at Roa Island (Morecambe Bay)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | -0.58 | 3.92 | 3.29 | -6.58 | | | |
| linear | 2 | -3.04 | 7.63 | 5.52 | -11.04 | 4.457 | 1 | 0.0347 |
| smooth (df = 2) | 3 | -1.57 | 23.43 | 5.78 | -11.57 | 0.529 | 1 | 0.4671 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2015 | 0.0203 | -0.4283 | -0.4486 | 0.2036 | -2.204 | 0.0787 |
| last 20 years | 1999 | 2015 | 0.0203 | -0.4283 | -0.4486 | 0.2036 | -2.204 | 0.0787 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.6516 | 0.1027 | -1.8477 | 0.1626 | -11.365 | 1.0000 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Pesticides data
Pesticides assessment
Related pages
