Collaborators: Jerry Warmbold (USD M.S. student))

Freshwater habitats are among the most altered in the world. Nearly 40% of all freshwater fish in the United States are threatened or endangered. Losses of freshwater fish can drastically alter the functioning of freshwater ecosystems, but these effects may not be limited to the water.

We study how fish regulate links between water and land by reducing the emergence of aquatic insects. We do this experimentally by combining different kinds of fish in ponds and streams and measuring how ecosystems respond. See pic below for an example, along with some relevant publications.

Cages in Bow Creek backwaterGOOD

  • Wesner, JS. 2013. Fish predation alters benthic, but not emerging, insects across whole pools of an intermittent stream.¬†Freshwater Science 32: 438-449. (pdf)
  • Wesner, JS. 2012. Predator diversity effects cascade across an ecosystem boundary. Oikos 121: 53-60. (abstract)
  • Wesner, JS. 2010. Aquatic predation alters a terrestrial prey subsidy. Ecology 91: 1435-1444. (pdf)