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Bulletin of Botanical Research ›› 2023, Vol. 43 ›› Issue (2): 169-178.doi: 10.7525/j.issn.1673-5102.2023.02.002

• Systematic and Evolutionary • Previous Articles     Next Articles

Study on Endangered Degree and Priority Conservation Sequence of Orchids in the Lower Reaches of Yarlung Zangbo River

Xinxin YANG1,2,3,4, Wenqian GU1,2,3,4, Shujun ZHANG1,2,3,4, Meng XING5, Xingle QU1,2,3,4, Jian LUO1,2,3,4()   

  1. 1.Institute of Plateau Ecology,Tibet Agricultural and Animal Husbandry University,Nyingchi 860000
    2.Key Laboratory of Tibet Plateau Forest Ecology of Ministry of Education&National,Nyingchi 860000
    3.Field Scientific Observation and Research Station of Tibet Nyingchi Mountane Forest Ecosystem,Nyingchi 860000
    4.Key Laboratory of Alpine Vegetation Ecological Security of Husbandry University,Nyingchi 860000
    5.College of Resources and Environment,Tibet Agricultural and Animal Husbandry University,Nyingchi 860000
  • Received:2022-09-29 Online:2023-03-20 Published:2023-03-07
  • Contact: Jian LUO E-mail:luojian@xza.edu.cn
  • About author:YANG Xinxin(1998—),male,postgraduate student,mainly engaged in flora and biodiversity research.
  • Supported by:
    National Natural Science Foundation of China(31560054);Second Tibetan Plateau Scientific Expedition and Research(STEP) Program(2019QZKK05020110);National Ecological Security Barrier Linzhi Ecological Monitoring Station 2022 Annual Monitoring Project


Based on the survey of orchid resources in the lower Yarlung Zangbo River region, the priority protection value of each endangered plant was quantitatively calculated using multiple evaluation indexes to determine the endangerment level and priority protection sequence of rare and endangered orchids in the region by combining data collection and specimen review. The endangerment level of 156 species of endangered orchids in 60 genera in the lower Yarlung Zangbo River region was evaluated, among which 15 species were in critically endangered(CR) status, 46 species in endangered(EN) status, 78 species in vulnerable(VU) status and 17 species in near threatened(NT) status; the priority protection range value was 0.853 9-0.416 8, among which 45 species were classified as Class Ⅰ protected plants, 72 species as Class Ⅱ protected plants, and 39 species as Class Ⅲ protected plants.The results of this study differ greatly from the endangered degree and priority protection level of various protected plant lists, and most of the orchids are under enhanced threat in this region, which is consistent with the real survival status of these orchids in the lower Yarlung Zangbo River area, and the protection of orchids in this region is urgent and should be given sufficient attention.

Key words: lower reaches of the Yarlung Zangbo River, Orchidaceae, evaluate, degree of endangered, priority protection sequence

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