Projects

CSEMP assessment of lead in biota at Canvey Island (Thames)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean145.2547.05-19.6239.25
linear235.6239.18-13.8127.6211.623 10.0007
smooth (df = 2)337.6243.87-13.8127.62 0.000 10.9996
smooth (df = 3)432.0942.37-10.0420.09 7.537 10.0060

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall199920176.9375.962-0.9758 0.2251-4.3350.0012
last 20 years199920176.9375.962-0.9758 0.2251-4.3350.0012

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 388.2 211.9-0.6055 0.1405-4.3080.9994
EC 388.21500.0 1.3516 0.1405 9.617<0.0001

 


Raw data with supporting information

Raw data with supporting information for assessment of  lead in biota at Canvey Island (Thames)


Raw data with assessment

Raw data with assessment of  lead in biota at Canvey Island (Thames)


Assessment plot

Assessment plot for  lead in biota at Canvey Island (Thames)


Metals data

Metals data for assessment of  lead in biota at Canvey Island (Thames)


Metals assessment

Metals assessment of  lead in biota at Canvey Island (Thames)


Related pages

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