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Funk

Ecotoxicity Study for Mayflies Exposed to Elevated Concentrations of Chloride at Different Temperatures

 800 532 Stroud Water Research Center

Chloride concentrations in surface waters have been increasing over the last several decades at multiple locations throughout the United States. At times, it appears that ambient chloride concentrations now reach…

Thermal Limitation in Aquatic Insects: Implications for Freshwater Biodiversity in a Warming World

 800 532 Stroud Water Research Center

This project tests the hypothesis that temperature limits the distributions of aquatic insects through its effect on resource allocation, and that warming decreases reproduction by shunting energy away from egg…

A female mayfly with a ball of eggs attached to the underside of her abdomen.

The Magic of Mayflies

 720 524 Stroud Water Research Center

Without any mouth parts, fully mature adult mayflies, called spinners, cannot eat, and so most live but a single day.

The Bug Whisperer: Dave Funk Decodes Mysteries of Mayflies and Other Clean-Water Lovers

 800 450 Stroud Water Research Center

Funk’s insatiable curiousity has served him well during 45 years as a instrumental player on landmark freshwater studies at the Stroud Center.

Cloeon dipterum, female imago (adult).

Oxygen Not Behind Threat To Mayflies When Temps Rise

 800 450 Stroud Water Research Center

When stream temperatures rise, often as a result of climate change or thermal pollution or a lack of tree shade, mayflies display poorer growth.

Publication title with image of a mayfly

Transcriptomic and life history responses of the mayfly Neocloeon triangulifer to chronic diel thermal challenge

 350 210 Stroud Water Research Center

Hsuan C., D.D. Jima, D.H. Funk, J.K. Jackson, B.W. Sweeney, and D.B. Buchwalter. 2020. Nature Scientific Reports 10:19119.

Video still from the Hidden World of Stream Insects webinar.

The Hidden World of Stream Insects

 800 450 Stroud Water Research Center

Entomologist David Funk presents an hour-long dive into the natural histories of some of the most fascinating stream insects he has photographed.

Watch Mayfly Nymphs Hatch Instantly

 800 450 Stroud Water Research Center

This video by Stroud Center Entomologist David Funk captured the moment an ovoviviparous mayfly laid a brood of eggs that hatched immediately into hundreds of nymphs.

Photo of the mayfly, Neocloeon triangulifer, by DH Funk

Modeling Mayflies to Understand the Challenges of a Warming Planet

 800 450 Stroud Water Research Center

There are some questions too complicated for lab experiments to answer.