ScienceDaily: By using satellites, biologists are now able to map which areas are most sensitive to climate variability on a global scale. A new metric, Vegetation Sensitivity Index (VSI), allows a more quantifiable response to climate change challenges and how sensitive different ecosystems are to short-term climate anomalies. Ecologically sensitive regions are the Arctic tundra, parts of the boreal forest belt, the tropical rainforests, alpine regions worldwide, steppe and prairie regions of central Asia and...