In this chapter, Thomas E. Lovejoy reports on the documented impacts of climate change on biotas. Massive releases of greenhouse gasses by humans have altered the climate. Rapid global warming is responsible for abiotic changes such as receding of glaciers and increase in wildfires. Increased CO2 concentrations in the atmosphere have acidified the oceans. Populations, species, and ecosystems are responding to these climatic conditions. Urgent actions are needed to reverse the climatic changes.
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