Projects

CSEMP assessment of lead in biota at Crosby (Mersey Channel)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean1 6.24 8.81-0.12 0.24
linear2 6.8212.16 0.59 -1.181.414 10.2344
smooth (df = 2)3 4.4014.40 2.80 -5.604.421 10.0355
smooth (df = 3)4-1.6716.33 6.83-13.678.070 10.0045

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200020177.3506.927-0.4231 0.3450-1.2270.2548
last 20 years200020177.3506.927-0.4231 0.3450-1.2270.2548

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC1019.7 211.9-1.5712 0.1943-8.0841.0000
EC1019.71500.0 0.3859 0.1943 1.9860.0412

 


Raw data with supporting information

Raw data with supporting information for assessment of  lead in biota at Crosby (Mersey Channel)


Raw data with assessment

Raw data with assessment of  lead in biota at Crosby (Mersey Channel)


Assessment plot

Assessment plot for  lead in biota at Crosby (Mersey Channel)


Metals data

Metals data for assessment of  lead in biota at Crosby (Mersey Channel)


Metals assessment

Metals assessment of  lead in biota at Crosby (Mersey Channel)


Related pages

  • Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
  • Assessment methodology for metals in biota
  • Accessment criteria for metals in biota