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Funk

Isopoda (aquatic sowbugs)

Test Your Skills With the #MysteryMacro Quiz

400 400 Stroud Water Research Center

Want a fun way to learn about freshwater macroinvertebrates? Check out the Pennsylvania Fish and Boat Commission #MysteryMacro quiz featuring photos by Dave Funk.

Publication title with image of a mayfly

The good, the bad and the lethal: gene expression and metabolomics reveal physiological mechanisms underlying chronic thermal effects in mayfly larvae (Neocloeon triangulifer)

350 210 Stroud Water Research Center

Chou, H., W. Pathmasiri, J. Deese-Spruill, S.J. Sumner, D. Jima, D. Funk, J. Jackson, B. Sweeney, and D. Buchwalter. 2018. Frontiers in Ecology and Evolution 6:27.

Parthenogenesis (Virgin Reproduction), Hybridization, and Life History Plasticity in Mayflies

800 532 Stroud Water Research Center

Scientists are studying a number of mayfly species in White Clay Creek as well as in streams throughout eastern North America to better understand virgin reproduction and hybridization in mayflies,…

Integration of Physiological, Life-History, and Macro-Ecological Approaches for Understanding Thermal Limitation in Aquatic Insects: Implications for Freshwater Biodiversity in a Warming World

800 532 Stroud Water Research Center

In this project, we test 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…

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…

Mayfly Eggs Hatching a Minute After Being Laid

719 403 Stroud Water Research Center

This ovoviviparous mayfly holds her eggs internally until embryonic development is complete after which she lays them in water and they hatch immediately.

Monitoring the Health of the Susquehanna

900 506 Stroud Water Research Center

Stroud™ Water Research Center’s annual sampling of the Susquehanna River near Mehoopany, Pennsylvania, was chronicled in an article in an area newspaper. Stroud Center studies have shown that the health…

Mystery Midge with “Kite Tail” Eggs

714 400 Stroud Water Research Center

Stroud Center entomologist David Funk documented the unusual behavior of an orthoclad midge species at Lake Umbagog on the Maine/New Hampshire border: Adult females fly over the lake and extrude…

Join the Clean Water Paddle Push!

When: August 1–16
Where: A body of water near you!

Grab your paddleboard, canoe, kayak, or inner tube and hit a body of water near you during our two-week celebration of water, the earth’s most vital natural resource.

Get all the details