2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/20/2019 | 2:15 PM - 2:30 PM | BEYOND BIOASSESSMENT: SETTING MANAGEMENT GOALS FOR FLOW AND EUTROPHICATION TO PROTECT BIOLOGICAL INTEGRITY IN CALIFORNIA WADEABLE STREAMS | 250 CF

BEYOND BIOASSESSMENT: SETTING MANAGEMENT GOALS FOR FLOW AND EUTROPHICATION TO PROTECT BIOLOGICAL INTEGRITY IN CALIFORNIA WADEABLE STREAMS

Although California is among the few remaining US states without a statewide biological objective, it nonetheless relies on bioassessment data to set management goals, such as identifying limits for hydrologic alteration, or evaluate thresholds to reduce eutrophication stress. Bioassessment indices for benthic macroinvertebrates and algae are used in stressor-response models to evaluate a variety of management activities. These models can then be used to evaluate management scenarios for their impacts on biological integrity. For example, flow-response models have been used to evaluate the impacts of increased water re-use or selecting between different BMPs. Similarly, eutrophication-response models may be used to identify potential targets to manage biostimulatory conditions and explore the impacts of tradeoffs between nutrient management and restoration. Using examples from southern California, we demonstrate how managers use bioassessment indices and stressor relationships to protect biological integrity. The central role of biological indicators in measuring environmental health make them an ideal focus for management, both within and apart from regulatory programs based on biological objectives.

Bioindicators
Environmental Regulation
Eutrophication

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Presenters/Authors

Raphael Mazor (), Southern California Coastal Water Research Project, raphaelm@sccwrp.org;