ORIGINAL RESEARCH
Prediction of Potential Geographic Distribution
of Endangered Relict Tree Species
Dipteronia sinensis in China Based
on MaxEnt and GIS
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1
Ecological Security and Protection Key Laboratory of Sichuan Province, Mianyang Normal University,
Mianyang 621000, Sichuan, China
2
Sichuan Academy of Environmental policy and planning, Chengdu 610093, Sichuan, China
3
School of Economics and Management, Southwest University of Science and Technology,
Mianyang 621010, Sichuan, China
Submission date: 2021-11-02
Final revision date: 2022-01-24
Acceptance date: 2022-02-24
Online publication date: 2022-05-05
Publication date: 2022-07-12
Pol. J. Environ. Stud. 2022;31(4):3597-3609
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ABSTRACT
Dipteronia sinensis is an endangered relict tree species in the endemic north temperate flora of
China, which has important reference values for studying paleoclimate and species variation as well
as geographic zonation changes. Based on 96 occurrence points of D. sinensis and 9 environmental
factors, the potential geographic distribution of D. sinensis in China under climate change was predicted
using MaxEnt model and ArcGIS software, the Jackknife test was used to assess the important
factors governing its potential geographic distribution. In addition, response curves were selected to
determine the suitable values of environmental factors and further quantitatively predicted the potential
geographic distribution of D. sinensis under the climate changet. The results showed that: (1) the
prediction accuracy of the MaxEnt model was extremely high, with an area under receiver operating
characteristic curve (AUC training value) of 0.959. The potential suitable habitat area of D. sinensis
under current climate condition was 103.9 × 104 km2, mainly located in the central and northwestern
regions of China; (2) the main environmental factors affecting the potential geographic distribution of
D. sinensis were the temperature factor (min temperature of coldest month) and the precipitation factor
(annual precipitation); (3) the area of low, high and total suitable habitats showed a decreasing trend
under SSP1-2.6 and SSP5-8.5 scenarios in 2070s, and the area of moderately suitable habitats showed an
increasing trend under the three scenarios in 2050s and 2070s, and the center of gravity of the potential
suitable habitats of D. sinensis would shift to the northwest. Our results can provide a theoretical basis
for the scientific management and resource conservation of D. sinensis.