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Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (29): 120-130.doi: 10.11924/j.issn.1000-6850.casb2024-0088

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Study on Ecological Niche Evolution and Invasion Potential During Invasion Process of Alien Plant Aegilops tauschii Coss.

ZHANG Chunling1(), YANG Yizhe2, CHEN Lili2, CHEN Yu1, WANG Jia1, LI Xindi1, ZHANG Xianrui1, SHI Yan1, XIE Jun1, WU Yifan1, LIU Gang1,3()   

  1. 1 College of life Sciences, Research Center for UAV Remote Sensing, Shaanxi Normal University, Xi'an 710119
    2 Farmland Quality and Agricultural Environment Protection Workstation of Shaanxi Province, Xi'an 710003
    3 Teaching Research Base of Ecology, Shaanxi Normal University, Xi'an 710119
  • Received:2024-02-06 Revised:2024-05-28 Online:2024-10-15 Published:2024-10-14

Abstract:

In order to strengthen China's ecological security barrier and protect biodiversity, and to prevent the ecological threats posed by the large-scale invasion and spread of Aegilops tauschii Coss., it is necessary to implement comprehensive control measures and dynamically monitor its invasion and spread trends. Based on the issues of prevention and management of A. tauschii in China, this study took A. tauschii as the research subject and utilized the Maximum Entropy (MaxEnt) model to analyze its potential suitable habitat range in China. Furthermore, the study employed Principal Component Analysis (PCA) to examine the climatic ecological niche changes of A. tauschii during its invasion process into China. By using ecological niche modeling, this study analyzed the current status and potential distribution of A. tauschii, identified the regions in China with the highest risk of invasion by this species, such as central China, southern Fujian, Zhanjiang in Guangdong, Hainan, the southwest and Tacheng regions of Xinjiang, and the western and southeastern parts of Tibet. The main ecological factors influencing its distribution are the precipitation of the driest month (Bio14) and the mean temperature of the warmest quarter (Bio10). High ecological niche stability indicates that A. tauschii is in an ecologically conservative state during the invasion process. The difference between the climatic ecological niche of A. tauschii in China and its native ecological niche is due to the unfilled niche, where the climatic ecological niche of the invasive population is merely a subset of the native ecological niche.

Key words: ecological niche modeling, niche shift, niche conservatism, invasive species, invasion stage, Aegilops tauschii Coss., potential suitable region, invasion risk