The risk of species extinction increases with every degree of warming. In the ocean, rising temperatures increase the risk of irreversible loss of marine and coastal ecosystems. Live coral reefs, for instance, have nearly halved in the past 150 years, and further warming threatens to destroy almost all remaining reefs.

A major impact of climate change on biodiversity is the increase in the intensity and frequency of fires, storms or periods of drought.

Climate change boosts the salinity increase in the fresh water rivers and other fresh water ecosystems. All the fresh water living entities are threatened due to salinity increase. Agricultural biodiversity is also hampered due to excess salinity. In a ward, aquatic ecosystem, agricultural biodiversity and human activities are completely disturbed only for saline water in absence of fresh water supply. Thus a normal and natural biosystem is replaced which is the consequence of altered climate. Besides, excessive dryness, intensity and frequency of cyclonic storm, sudden and strong downfall etc are altogether detrimental to the extinction of existing living bodies. Destructive forest fires is the experience of long time heat and dryness; and shifting of previous weather situation brings about this fatal catastrophe. And massive biodiversity loss is only the final attainment of this phenomenon.

Climate change's impact on biodiversity manifests in the modification of habitats. As the temperature surges, numerous species must relocate to cooler regions to survive. This can bring about alterations in the dispersion of species and modifications in the timing of seasonal occurrences such as migration and breeding. Furthermore, the escalation of sea levels resulting from the thawing of glaciers and ice caps can result in the disappearance of coastal habitats, which are fundamental for many species. Climate change influences biodiversity through the amplified occurrence and severity of extreme weather events such as hurricanes, floods, and wildfires. These events can cause extensive ecosystem destruction and disrupt the intricate balance of species interdependence. For instance, wildfires can obliterate habitats and displace wildlife, while floods can rinse away entire flora and fauna populations.