<human>:  How are climate change and global warming affecting the Arctic ecosystem?
<bot>: Climate change and global warming are leading to dramatic changes in the Arctic ecosystem, including melting sea ice, warmer ocean and air temperatures, ocean acidification, and thawing permafrost. This is causing several species to migrate, shift their range, or even become extinct in the Arctic. Additionally, these environmental changes are also causing changes in the food web, leading to an increased risk of starvation for some species. Overall, the consequences of climate change and global warming in the Arctic will have far-reaching impacts on the health and productivity of the entire region.