3.5. Ecological characteristics of distribution areas
The relationship between main environmental factors and potential
distribution areas is shown in Table 5. Under the three climate
scenarios of ssp126, ssp245, and ssp585, the suitability of L.
japonicus in the 2050s and 2090s was lower than that in the current
period, and the decrease was greater than 0.1. Under the ssp585
scenario, the decrease in the 2090s was 0.25. In the ssp126 climate
scenario, the suitability of 2090s was increased compared with the
2050s, and the growth rate was 0.01.
The minimum temperature of the coldest month and the precipitation of
the wettest month of the 489 distribution points of L. japonicuswere opposite to the changes in habitat suitability of L.
japonicus. In the two periods of 2050s and 2090s, the three scenarios
of ssp126, ssp245, and ssp585 showed increasing trends.
The maximum temperature of the hottest month in 489 distribution sites
increased by 8.9%, 8.5%, and 10.8% in the 2050s under ssp126, ssp245,
and ssp585, respectively. The warmest month maximum temperatures in the
2090s under ssp245 and ssp585 scenarios increased by 3.5% and 8.8%,
respectively, compared to those in the 2050s.
The driest month precipitation of 489 Leonurus artemisiadistribution points showed a downward trend in the 2050s and 2090s under
the three scenarios of ssp126, ssp245, and ssp585.
Table 5 Results of the analysis of major environmental variables