Farah Abi-Akar (MDE) - Maryland Department of Natural Resources ...

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Attributable Risk • The portion of samples with poor to very poor biological conditions as a result of the stressor The % of cases that are the stressor’s “fault” AR Proportion cases - Proportion controls AR a a c b b d
Attributable Risk • ARs are also combined by category: Stressors • Sediment • Habitat • Water Chemistry Sources • Acid sources • Land use – Agriculture • Land use – Anthropogenic • Land use – Urban
Page 1 and 2: Biological Stressor Identification
Page 3 and 4: Background
Page 5 and 6: Background • MD Water Quality Sta
Page 7 and 8: Background • WQS not met Watersh
Page 9 and 10: How the BSID works
Page 11 and 12: Data • DNR’s Maryland Biologica
Page 13 and 14: Goal: Compare Bio to Stressors •
Page 15 and 16: Goal: Compare Bio to Stressors Cont
Page 17 and 18: Goal: Compare Bio to Stressors 2. S
Page 19 and 20: Goal: Compare Bio to Stressors Stre
Page 21 and 22: Goal: Compare Bio to Stressors Stre
Page 23 and 24: 1. Do these overlap Yes they are n
Page 25 and 26: Goal: Compare Bio to Stressors
Page 27 and 28: Goal: Compare Bio to Stressors •
Page 29: Thanks to odds ratios, probable str
Page 33 and 34: Stressor above Cases 6 Controls 9 E
Page 35 and 36: Group Stressor AR Sources - Agr Hig
Page 37 and 38: # Watersheds Impacted per Stressor
Page 39 and 40: BSID Output • Watershed-specific
Page 41 and 42: What’s next • Analysis of resul

Farah Abi-Akar (MDE) - Maryland Department of Natural Resources ...

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