This article was originally published on Phys.org
“”Changes in Indiana’s climate are going to affect the timing of water flows, the quality of water and water temperatures. All of these things have major implications for the wide variety of animals and plants that live in aquatic ecosystems,” said Jeff Dukes, director of the Purdue Climate Change Research Center. “Climate change is an additional stressor to Indiana’s native fish population. We already have invasive fish in many of our water bodies, and we have added a wide variety of pollutants and nutrients to our streams. How well some of our native populations will be able to deal with this accumulation of stresses piling up on them is still unclear.”
Rising water temperatures will likely shift stratification – the layering of water at different depths in lakes. That may improve or increase habitat for the state’s warm water fish. However, those rising temperatures and increasing spring rain totals will send more nutrients from farm fields into nearby waters. That combination is problematic for many coldwater species, such as cisco, a native fish that used to exist in about 50 of the state’s lakes but has already suffered from rising temperatures.
“Because many of our lakes are very nutrient-rich, they experience large algal blooms in late spring and summer, which may grow larger with warmer temperatures and more spring runoff. Dead algae later settle to the lake’s bottom, are decomposed by bacteria depleting the water’s oxygen,” said Tomas Höök, Purdue professor of fisheries and aquatic sciences, director of Illinois-Indiana Sea Grant and lead author of the report…”
Read on at: Phys.org