Figure 4.4 from Chapter 4 of Working Group (WG) II of the IPCC AR4 report illustrates some of the risks to various ecosystems in a warmer world

Figure 4.4 from Chapter 4 of Working Group (WG) II of the IPCC AR4 report illustrates some of the risks to various ecosystems in a warmer world (click here for a larger version):

Compendium of projected risks due to critical climate change impacts on ecosystems for different levels of global mean annual temperature rise, ΔT, relative to pre-industrial climate.