Anthropogenic activities such as the burning of fossil fuels result in increased atmospheric carbon dioxide (CO2) concentration. High levels of atmospheric CO2 cause chemical shifts in the carbon cycle. Changes in the carbon cycle due to increased CO2 levels lead to ocean and freshwater acidification. Freshwater acidification is problematic for species that synthesize their own shells as well as species that use olfaction for decision-making. Rusty crayfish (Faxonius rusticus) were subject to simulated freshwater acidification and fed two types of macrophyte, Chara (Chara braunii) and Myriopyllum (Myriophyllum sibiricum). A series of programming language of R (R Core Team, 2019) indicated that simulated freshwater acidification alters the abundance of macrophytes consumed by rusty crayfish. This study demonstrates that freshwater acidification due to atmospheric levels of CO2 leads to foraging changes in crayfish.
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Tucker, Lauren; Moore, Paul Dr.; and Jones, Jay Mr., "Too Little pH: How Freshwater Acidification Impacts the Abundance of Macrophytes Consumed by Rusty Crayfish" (2021). Honors Projects. 594.