DATA ANALYSI S Integrate data, calculate sums Calculate summary - PowerPoint PPT Presentation

DATA ANALYSI S • Integrate data, calculate sums • Calculate summary statistics (baywide and by region) • Focusing on detects • Plot data (box and whiskers and maps) SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) SEPTEMBER 14, 2016

DATA ANALYSI S Silver in Sediment 1991 2001 2011 • Integrate data, calculate sums 1 0.9 • Calculate summary statistics (baywide Cumulative Frequency 0.8 and by region) 0.7 0.6 • Focusing on detects 0.5 0.4 • Plot data (box and whiskers and maps) 0.3 0.2 • Exploratory analysis (identify data issues) 0.1 0 0 2 4 6 8 Silver (mg/kg) SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) SEPTEMBER 14, 2016

DATA ANALYSI S • Integrate data, calculate sums • Calculate summary statistics (baywide and by region) • Focusing on detects • Plot data (box and whiskers and maps) • Exploratory analysis (identify data issues) • Comparison to screening values Adverse effects in aquatic organisms (invertebrates and fish) Effects Range Low ( ERL) : Concentration at which effects rarely observed Effects Range Median ( ERM) : Concentration above which effects are frequently observed SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) SEPTEMBER 14, 2016

DATA ANALYSI S • Integrate data, calculate sums • Calculate summary statistics (baywide and by region) • Focusing on detects • Plot data (box and whiskers and maps) • Exploratory analysis (identify data issues) • Comparison to screening values • Statistical analysis (by region and time) • Geospatial analysis to illustrate notable trends SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) SEPTEMBER 14, 2016

DATA ANALYSI S • Integrate data, calculate sums • Calculate summary statistics (baywide and by region) • Focusing on detects • Plot data (box and whiskers and maps) • Exploratory analysis (identify data issues) • Comparison to screening values • Statistical analysis (by region and time) • Geospatial analysis to illustrate notable trends • Comparison to rest of Gulf of Maine SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) SEPTEMBER 14, 2016

RESULTS: 2 0 1 0 -2 0 1 1 DATA BOX PLOTS “Outliers” or extreme values 75 th percentile (3/ 4ths of data fall Whiskers show the Concentration below this line) full range of the data, w/ o outliers Half of the data fall within this range 25 th percentile (1/ 4ths of data fall Median (half the data below this line) below and half above) SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) SEPTEMBER 14, 2016

RESULTS: 2 0 1 0 -2 0 1 1 DATA SEDI MENT GRAI N SI ZE SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) SEPTEMBER 14, 2016

RESULTS: 2 0 1 0 -2 0 1 1 DATA EXAMPLE METALS * * * * * * SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) * : statistically significant differences SEPTEMBER 14, 2016 between regions

RESULTS: 2 0 1 0 -2 0 1 1 DATA SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) SEPTEMBER 14, 2016

RESULTS: 2 0 1 0 -2 0 1 1 DATA PAHS * * * SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) * : statistically significant differences SEPTEMBER 14, 2016 between regions

SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) SEPTEMBER 14, 2016 RESULTS: 1 9 9 1 -2 0 1 1 CASCO BAY

RESULTS: 1 9 9 1 -2 0 1 1 CASCO BAY METALS * * * * SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) * : statistically significant trend in SEPTEMBER 14, 2016 concentration by time

SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) SEPTEMBER 14, 2016 LEAD I N CASCO BAY, 1 9 9 1 -2 0 1 1

SEDIMENT ASSESSMENT OF CASCO BAY (1991-2011) SEPTEMBER 14, 2016 LEAD I N CASCO BAY, 1 9 9 1 -2 0 1 1