3 RESULTS

3.1 Species distribution records

On the basis of the selection criteria in section 2.1, we finally identified 25 rare, endangered and/or national protected species with high simulation accuracy, belonging to 23 genera and 19 families (Table 2). We had organized the collected species distribution data and obtained a total of 314 distribution records of species, and further understood the distribution status of each species in Northwest Yunnan. The result suggested that there were at least four distribution records for each species, as a result, detailed distribution records were shown in Table 2. Among them, Dipentodon sinicus and Psammosilene tunicoides had more occurrence records, with a total of 59 and 41, respectively. They were mainly distributed in the vicinity of the Gaoligong Mountain National Nature Reserve and several PNRs (i.e., Napahai, Bitahai, Haba Snow Mountain and Yulong Snow Mountain). However, Anisodus tanguticus , Camellia reticulata and Paris rugosa owned few distribution records, with four for each. They were scattered in the vicinity of Gaoligong Mountain, Baima Snow Mountain and Cangshan Erhai NNRs.
TABLE 2  The checklist of species used in this study was according to IUCN Red List criteria and The National Key Protected Wild Plants List, specifically: 1) Threat level: referenced IUCN Red List criteria, Vulnerable (VU), Endangered (EN), Critically Endangered (CR); 2) Protection level: 1 represents The National Key Protected Wild Plants List (the first), 2 represents The National Key Protected Wild Plants List (the second), I denotes national first-level protected species, II denotes national second-level protected species. Samples: the distribution records of the 25 rare, endangered and/or national protected species as the input of the MaxEnt modelling