EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021

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6/07/2017  |   10:15 AM - 10:30 AM   |  INFLUENCE OF FISHES ON INSECT EMERGENCE FROM PRAIRIE STREAM PERMANENT WATER REFUGIA   |  302C

INFLUENCE OF FISHES ON INSECT EMERGENCE FROM PRAIRIE STREAM PERMANENT WATER REFUGIA

Hydrology is a major structuring force of macroinvertebrate communities in prairie streams, with permanent reaches serving as refugia during hydrologic disturbances. Macroinvertebrate densities decrease dramatically in response to hydrologic extremes, making downstream drift from perennial reaches and adult oviposition important for recolonization. Fishes might interact with hydrologic extremes if they are concentrated in permanent reaches and influence whether insects survive to emerge as adults. We examined community structure of fishes and emerging insects from permanent waters of streams at Konza Prairie Biological Station during summer 2016. Fish communities varied across permanent water sites. Total fish biomass was not correlated with total insect emergence, but orangethroat darter (Etheostoma spectabile) biomass was negatively correlated with emerging Chironomidae biomass (r²=0.43, p=0.047) and individual body size (r²=0.61, p=0.014). Predatory fish biomass and a date interaction appeared in top linear models, indicating fish may also delay insect emergence. Few studies have investigated the effects of benthic feeding fish, such as darters, on insect emergence. Understanding how fishes in prairie streams affect ecosystem structure and function will inform conservation and management of remaining grassland streams.

• C03 Invertebrates
• C02 Fish and Other Aquatic Vertebrates
• C11 Community Ecology

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Presenters/Authors

Sophia Bonjour (), Southern Illinois University , sbonjour29@gmail.com;

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Matt Whiles (), University of Florida, mwhiles@ufl.edu;

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Keith Gido (), Kansas State University, kgido@ksu.edu;

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