3.4 Changes in the suitable areas of T. chinense under
future climatic conditions
Figure S2 and S3 showed the spatial distribution pattern and area change
of suitable areas at each level of the complete ecological niche ofT. chinense under future climate conditions. In China, the
suitable areas will still be mainly distributed in the eastern and
southern of China under future climatic conditions. As climate warming
intensifies (increase of year and carbon emissions), the suitable areas
will gradually expand to the northern part of the current suitable range
and Tibet, and only slightly decrease in the southern part of the
suitable areas (Figure 5A). Under future climate change, it is expected
that T. chinense will move towards higher altitude and higher
latitude areas in China (Figure 5B). Compared with the current
distribution of suitable areas, the total area of suitable areas ofT. chinense in China will increase year by year with the increase
of carbon emissions, and the total area of T. chinense will
expand to the maximum (557.82 * 104 km2) under the climate scenario of
2050s-SSP3-7.0 (Figure 6). In all levels of suitable areas, the areas of
high suitable areas show a decreasing trend, while the areas of low
suitable areas and medium suitable areas show an increasing trend.
Moreover, the degree of change is gradually obvious with the increase of
year and carbon emissions. In the 2090s-SSP5-8.5, the area of high
suitable areas is reduced to the smallest, which decreases by 36.76%
compared with the current situation. Under the 2090s-SSP5-8.5 scenario,
the area of low suitable areas expands to the largest, about 159.95 *
104 km2.