Assessment of the geographical distribution pattern and the Red List of Castanea in China
To protect and utilize the wild resources of Castanea,the geographical distribution pattern should be studied.Based on Flora,China Digital Herbarium(CVH)and Global Biodiversity Information Network(GBIF),the number of Cas-tanea species was counted corresponding to each province in China,and the latest research published papers and mono-graphs was applied to complete the geographical distribution map of existing chestnut species in China.The distribution cen-ter of Castanea species in China is in the central and southern parts of China,with more species distributed in Sichuan,Guizhou,Hunan,Hubei,Jiangxi and Zhejiang provinces.The distribution area of C.henryi covers 15 provinces including Sichuan and Yunnan,especially concentrated in Sichuan,Hunan,and Jiangxi;the distribution area of C.seguinii covers 17 provinces(municipalities)including Gansu,Sichuan,and Yunnan,especially concentrated in Zhejiang and Jiangxi;C.mollissima distribution areas covers Tibet,Gansu,Sichuan,totally 27 provinces(municipalities),concentrated in 5 prov-inces of Sichuan,Shanxi,Hubei,Chongqing and Guizhou;the introduced C.sativa and C.crenata are distributed in rela-tively few areas.C.crenata is distributed in 2 provinces(municipalities),i.e.Sichuan and Shanghai.C.sativa is cultivated in 8 provinces,including Yunnan,Guangxi and Shandong,with the largest distribution in Shandong.Data were filtered ac-cording to spatial scale requirements,and Red List assessment of Chinese Castanea species was conducted through Geo-CAT,in order to provide important data for the diversity research of Chinese Castanea.The results show that Castanea plants are concentrated in Southwest,Central and East China,less and sporadically distributed in South and North China,and almost non-existent in the Northwest and Northeast regions.The assessment results of the species of Castanea in China are non-threatened(LC),meaning no threatened species present.
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