2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/24/2018 | 10:15 AM - 10:30 AM | USING A TRAITS APPROACH TO HELP DISENTANGLE THE DIRECT AND INDIRECT EFFECTS OF ANTHROPOGENIC FACTORS ON INVERTEBRATE RESPONSE TO STREAM FLOW ALTERATION | 330 B
USING A TRAITS APPROACH TO HELP DISENTANGLE THE DIRECT AND INDIRECT EFFECTS OF ANTHROPOGENIC FACTORS ON INVERTEBRATE RESPONSE TO STREAM FLOW ALTERATION
Prior work in the Delaware River Basin (DRB) indicated that modeling basin-scale responses of invertebrates to hydrologic alteration using assemblage metrics (e.g., EPT richness) was challenging because the effects of hydrologic alteration were intertwined with natural and anthropogenic factors (e.g., land use and ecoregion). Understanding the role of hydrologic alteration in structuring assemblages requires disentangling these responses when developing flow-ecology response models and(or) using different indicators of invertebrate responses. Functional species traits may represent a suitable alternative to assemblage metrics as they provide more mechanistic insights into an organism’s response to environmental conditions. Monitoring data from 1,488 DRB sites from 9 different agencies were used to develop invertebrate trait metrics and regression tree analysis was used to identify significant streamflow variables and model their relations with invertebrate traits (e.g., life-history, habitat preference, and reproductive strategy). Measures of flow frequency and magnitude appeared to be the most important predictors of trait response to flow alteration. These results are being incorporated into Bayesian and Path models to facilitate a more rigorous understanding of flow-biology relations and landscape effects on flow characteristics.
- Functional Ecology
- Hydrology
- Landscape
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Presenters/Authors
Jonathan Kennen
(), U.S. Geological Survey, New Jersey Water Science Center, 3450 Princeton Pike, Suite 110, Lawrenceville, NJ 08648, jgkennen@usgs.gov;
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Thomas Cuffney
(), U.S. Geological Survey, South Atlantic Water Science Center, 3916 Sunset Ridge Rd., Raleigh, NC 27607, tcuffney@usgs.gov;
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