Found most frequently in sandy and gravelly soils. Mosses, gather in colonies which make them possible to collect and retain more water. They also lose less by evaporation and show a marked ability to use water rapidly whenever it becomes available. Mosses have also become well adapted to the almost continuous light during the long days of a polar summer. Short Moss turf produces more energy by photosynthesis in low light at 5°C than it does at 15°C, or higher. Photosynthesis can start within a few hours of thawing after a prolonged period of freezing, and almost immediately following short periods.
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