According to the report, some of the small mammals have recently acquired new parasites,
indicating poleward shifts of sub-Arctic faunas and increases in biodiversity.
Recent meta - analyses
indicate that on average, examined terrestrial species have been moving
poleward about 1.76 km / yr (reported as 17.6 + 2.9 km / decade), apparently keeping pace with regional temperature change, although species range
shifts to higher elevations have on average lagged behind climate (Chen et al., 2011).