Marine Iguana Feeding on Algae -- Galapagos Islands

The photograph showing a marine iguana feeding on algae in the Galapagos Islands (Ecuador) illustrates at least two aspects of nature's delicate balance which can be affected by climate change: 1)  Marine iguanas have uniquely evolved to fill a small niche in the local ecosystem, and since they are cold-blooded animals, their metabolism is completely controlled by the temperature of the ocean where they feed; 2) Marine iguanas feed exclusively on a certain type of algae which only grows in certain parts of the Galapagos Archapelago, and algae growth is determined by sunlight intensity and water temperature.