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Figure 20: The number of immigrants and emigrants shown as a proportion of
the original species richness. Left: ‘Immigrants’– the number of species
projected to have suitable climate space in 2085 (median) where they were
absent in 1990, shown as a proportion of the number of species occurring in
1990. Right: ‘Emigrants’ – the number of species projected to have lost suitable
climate space in 2085 (median) where they were present in 1990, shown as a
proportion of the number of species occurring in 1990.
Similar patterns, with varying magnitudes, are shown when we break the analysis down
into each of the four taxonomic groups (Figure 21). Immigration was projected to occur
mostly in the south and east of the continent, but the far south corner of south-west
Western Australia was also projected to have species climate space move into this
area, particularly for mammals and reptiles. Emigrating species were projected to be
the highest in the north for amphibians, west for birds, and the north and west for
mammals and reptiles.
34 Climate change refugia for terrestrial biodiversity