| impacts of long-term enhanced uv-b radiation on bryophytes in two sub-arctic heathland sites of contrasting water availability. | background and aims anthropogenic depletion of stratospheric ozone in arctic latitudes has resulted in an increase of ultraviolet-b radiation (uv-b) reaching the biosphere. uv-b exposure is known to reduce above-ground biomass and plant height, to increase dna damage and cause accumulation of uv-absorbing compounds in polar plants. however, many studies on arctic mosses tended to be inconclusive. the importance of different water availability in influencing uv-b impacts on lower plants in the ar ... | 2011 | 21803739 |