2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/25/2021 | 8:30 AM - 10:30 AM | ANTECEDENT CONDITIONS AND LOCAL CLIMATE SHAPE STREAM INVERTEBRATE COMMUNITY RESPONSES TO A MAJOR STORM DISTURBANCE | Virtual Platform

ANTECEDENT CONDITIONS AND LOCAL CLIMATE SHAPE STREAM INVERTEBRATE COMMUNITY RESPONSES TO A MAJOR STORM DISTURBANCE

Major disturbances such as hurricanes can alter dynamics of biological systems. However, responses of ecological communities to a major disturbance vary due to differences in storm characteristics and variation in the antecedent conditions prior to the disturbance. Our goal was to determine the role of rainfall regime on the resistance and resilience of stream invertebrate communities to Hurricane Harvey in 2017. As expected, we observed that there was a positive relationship between storm rainfall, flood magnitude, and flood duration. Flood duration was positively related to the time it took for communities to return to baseline and flood magnitude was positively related to the size of the invertebrate response. However, mesic (wetter) streams had a dampened flood magnitude, but longer flood duration per unit storm rainfall. The invertebrate response, per unit flood magnitude, was also lower in mesic sites, potentially due to differences in species identity or eco-evolutionary adaptations. This indicates that changes in precipitation regime have the potential to alter the resistance and resilience of stream ecosystems and underscores the important influence of climate on ecosystem stability.

Ecological dynamics
Flow regime
Global change

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Presenters/Authors

Bradley Strickland (), Virginia Institute of Marine Science, bastrickland273@gmail.com;