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In northern forests, which are the forests most vulnerable to climate change, two-thirds of the currently forested area may undergo a change in vegetation type. Mountaintop species and isolated populations are particularly vulnerable. Over the next century, the ideal range for some North American forest species will shift by as much as 300 miles to the north, exceeding the ability of many species to migrate. In some instances, a change in vegetation type will result in a loss of forest area as the land converts to grassland or shrub land, while in other areas forest cover may increase. In the United States, western conifer forests could decrease in area and be replaced by broadleaf forests; eastern hardwood forests may be replaced by grasslands along their western boundary because of mid-continental drying. Forest damage from fire and diebacks driven by drought, insects and disease could increase." Please document these statements. A26. Chapter 1 of the document Climate Change 1995 - Impacts, Adaptations and Mitigation of Climate Change: Scientific-Technical Analyses summarizes the IPCC's most recent conclusions on climate change impacts on forests. Forests are highly sensitive to climate change, which has been documented via past observations, experimental studies, and modeling. Sustained temperature increases of as little as 1°C can be sufficient to cause changes in the growth and regeneration capacity of many tree species. Suitable habitats are likely to shift faster than the maximum natural rate at which many species can migrate. A copy of this chapter of the document is attached. 1 Climate Change Impacts on Forests MIKO U.F. KIRSCHBAUM, AUSTRALIA; ANDREAS FISCHLIN, SWITZERLAND Lead Authors: M.G.R. Cannell, UK; R.V.O. Cruz, Philippines; W. Galinski, Poland; W.P. Cramer, Germany Contributing Authors: A. Alvarez, Cuba; M.P. Austin, Australia; H.K.M. Bugmann, Germany; T.H. Booth, A. Markham, WWF; R.E. McMurtrie, Australia; R.P. Neilson, USA; R.J. Norby, |