The main impact of climate change on freshwater ecosystems is a shift in water temperature and flow patterns, which can lead to habitat degradation. Increased temperatures can exacerbate problems like algal blooms, reducing oxygen levels and affecting aquatic life. Changes in precipitation patterns may result in more frequent flooding or droughts, altering the natural hydrology and disrupting the balance of these ecosystems. Additionally, invasive species may thrive under new conditions, further threatening native biodiversity. Overall, the integrity of freshwater systems is compromised, impacting the species that rely on them for survival.