Science Alert: A leading international forest scientist has warned the wholesale relocation of the world’s temperate forest tree species may take place under climate change. However, today’s trees may have to migrate a lot faster that the 100 metres a year which forests achieved naturally as the earth’s climate warmed towards the end of the last Ice Age – if they are to keep up with currently changing conditions, says Professor Sally Aitken of the University of British Columbia’s Centre for Forest …