2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
6/06/2017 | 2:30 PM - 2:45 PM | EVALUATING MACROINVERTEBRATE COMMUNITY RESPONSES TO IMPERVIOUS COVER IN CALIFORNIA WITH THRESHOLD INDICATOR TAXA ANALYSIS | 302A
EVALUATING MACROINVERTEBRATE COMMUNITY RESPONSES TO IMPERVIOUS COVER IN CALIFORNIA WITH THRESHOLD INDICATOR TAXA ANALYSIS
Since 2010, new construction in California is required to include stormwater detention and infiltration that is designed to capture rainfall from the 85th percentile of storm events in the region, preferably through green infrastructure. This study used recent macroinvertebrate community monitoring data to determine the ecological threshold for percent impervious cover prior to large scale adoption of green infrastructure using Threshold Indicator Taxa Analysis (TITAN). TITAN uses an environmental gradient and biological community data to determine individual taxa change points with respect to changes in taxa abundance and frequency across that gradient. Individual taxa change points are then aggregated to calculate the ecological threshold. This study used impervious cover data from National Land Cover Datasets and macroinvertebrate community data from California Environmental Data Exchange Network and Southern California Coastal Water Research Project. Preliminary TITAN runs for California’s Chaparral region indicated that both increasing and decreasing taxa had ecological thresholds of <1% watershed impervious cover. Next, TITAN will be used to determine shifts in the ecological threshold after the implementation of green infrastructure on a large scale.
- C27 Landuse and Non-Point source Impacts
- C17 Bioassessment
- C08 Urban Ecology
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Presenters/Authors
Stephanie Figary
(), ORISE Research Participant at the USEPA EPA/ORD/NHEERL Atlantic Ecology Division, figary.stephanie@epa.gov;
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Naomi Detenbeck
(), U.S. EPA/ORD/NHEERL Atlantic Ecology Division, Detenbeck.Naomi@epa.gov;
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