Climate change is generally expected to have negative impacts on river and lake ecosystems, including increased water temperature, changes in precipitation patterns, and reduced biodiversity. Improved water quality is not a likely outcome of climate change in these ecosystems.

The effect of increased water temperature on aquatic organisms can vary depending on the species and its adaptation to temperature changes. Some organisms may experience increased metabolism and growth rate, while others may experience decreased metabolism and growth rate. Some organisms may be more tolerant of temperature changes than others.

Changes in precipitation patterns due to climate change can lead to flooding, droughts, and increased erosion, which can negatively impact river and lake ecosystems. Improved water quality is not a likely consequence of changes in precipitation patterns.

Reduced biodiversity in river and lake ecosystems can decrease the ecosystem's resilience to environmental changes, such as climate change. A more diverse ecosystem is generally more resilient and able to adapt to changes in environmental conditions.

Implementing water conservation measures, restoring degraded riparian areas, and reducing pollution inputs are all potential adaptation strategies that can help mitigate the impacts of climate change on river and lake ecosystems in India.