Acidic lakes are bodies of water with a low pH, typically below 7. This acidity can result from natural processes, such as the presence of sulfuric acid from volcanic activity or the leaching of minerals from surrounding rocks. Human activities, like acid rain caused by pollution, can also contribute to the acidity of these lakes. The high acidity in these lakes can harm aquatic life, making it difficult for organisms like fish and invertebrates to survive. Acidic conditions can lead to a decrease in biodiversity and disrupt the ecosystem, affecting food chains and overall water quality.