CSEMP assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 48.82 | 50.21 | -21.41 | 42.82 | | | |
| linear | 2 | 46.26 | 48.92 | -19.13 | 38.26 | 4.566 | 1 | 0.0326 |
| smooth (df = 2) | 3 | 46.58 | 51.12 | -18.29 | 36.58 | 1.678 | 1 | 0.1952 |
| smooth (df = 3) | 4 | 48.03 | 55.23 | -18.02 | 36.03 | 0.545 | 1 | 0.4603 |
| smooth (df = 4) | 5 | 48.07 | 58.96 | -17.03 | 34.07 | 1.963 | 1 | 0.1612 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 6.361 | 5.663 | -0.6988 | 0.3053 | -2.289 | 0.0381 |
| last 20 years | 2000 | 2018 | 6.361 | 5.663 | -0.6988 | 0.3053 | -2.289 | 0.0381 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 287.9 | 30.0 | -2.2614 | 0.2045 | -11.056 | 1.0000 |
| ERL | 287.9 | 430.0 | 0.4012 | 0.2045 | 1.962 | 0.0350 |
Raw data with supporting information
![Raw data with supporting information for assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcn_06_sdmn_bap_au.jpg "Raw data with supporting information for assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)")
Raw data with assessment
![Raw data with assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcn_06_sdmn_bap_da.jpg "Raw data with assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)")
Assessment plot
![Assessment plot for benzo[a]pyrene in sediment at Holy Loch (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcn_06_sdmn_bap_as.jpg "Assessment plot for benzo[a]pyrene in sediment at Holy Loch (Clyde)")
PAH (parent) data
![PAH (parent) data for assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcn_06_sdmn_p(p)da.jpg "PAH (parent) data for assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)")
PAH (parent) assessment
![PAH (parent) assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)](/projects/data_management/uk/merman/assessments_and_data_access/csemp/assessments/images/sediment_clyd_frthcn_06_sdmn_p(p)as.jpg "PAH (parent) assessment of benzo[a]pyrene in sediment at Holy Loch (Clyde)")
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