The impact of anthropogenic climate change on terrestrial organisms is often expected to increase with latitude, as the greatest increases in temperature are expected to happen at high latitudes. however, the biological impact of rising temperatures also depends on the physiological sensitivity of organisms to temperature variation. rescarchers calculated fitness curves as a function of environmental temperature for representative invertebrate taxa from (a) temperate and (b) tropical locations, and then (c) modelled the predicted change in fitness in response to climate warming by the year 2100 for all species studied, as a function of latitude the critical thermal minimum (ct, optimal environmental temperature (tss), and critical thermal maximum (ctmx) are indicated on both temperature performance curves (a and b). 0.3 0.2 01 0.0 0.9a 0.6 0.3 1ct at 10 0 10 20 30 40 0.9 0.6 0.31 ct -0.2 10 0 10 20 30 40 temperature (â°c) 0.3 60s 40s 20s 0 20n 40n 60n latitude b. based on these results, which group of invertebrates (temperate or tropical) is best physiologically suited to high temperatures under current conditions? explain.