Habitat characteristics, population structure, distribution, and regeneration status of Taxus wallichiana in South Vietnam




Abstract. Hop NV, Xiong CC, Quy NV, Luong NT. 2023. Habitat characteristics, population structure, distribution, and regeneration status of Taxus wallichiana in South Vietnam. Nusantara Bioscience 15: 179-188. Taxus wallichiana Zucc. is an endangered plant species with high economic value, making it threatened to extinction. Biological information about this species is therefore essential for its conservation. This study is aimed to assess the habitat characteristics, population structure, distribution, and regeneration status of T. wallichiana in South Vietnam. Vegetation surveys were conducted from 2016 to 2021 in three regions in Lam Dong Province. The study revealed that it was distributed in regions with monsoon climate with a total extent of ??379.57 ha, with habitats located on the hillside, narrow shelves, dissected terrain, high slope, on feralite soil with light brown to yellow, red, the soil layer thickness over 0.3 m and in clusters or streaks. The study recorded 634 trees with a diameter at breast height (DBH)?25 cm and 137 trees with 6 cm ?DBH<25 cm. The trees were found primarily at 1401-1500 m above sea level in a mixed broadleaved-coniferous forest. The growth indicators of DBH and overall height (Hvn) developed strongly, but the stand volume was low owing to low tree density. The exponential function was the most suitable for simulating the relationship between Hvn and DBH. Seven thousand six hundred and seventy-three regenerating young individuals were recorded with low density. The density of the regenerating trees decreased as the tree height increased. The finding of this study suggests that T. wallichiana faces the danger of extinction, so solutions are required to conserve and develop this threatened species.



Ban NT, Ly TD, Khoi NK. 2007. Vietnam Red Data Book, Part II-Plants. Natural Science and Technology Publishing, Hanoi, Vietnam. [Vietnamese]
Bhardwaj V. 2023. Taxus wallichiana Zucc. (Himalayan yew): A medicinal plant exhibiting antibacterial properties. Adv Exp Med Biol 1370: 145-153. DOI: 10.1007/5584_2023_772.
Brum K. 2019. Study the Silvicultural Characteristics of T. wallichiana in the Subtropical Moist Forest Vegetation Status in Bidoup - Nui Ba National Park, Lam Dong Province. [Master's Thesis]. Forestry University-Dong Nai Campus, Dong Nai, Vietnam. [Vietnamese]
Dissanayake I, Jaye K, Eladwy RAM, Farrukh S, Yasmin S, Bhuyan DJ, and Pandohee J. 2023. Taxus wallichiana Zucc.: The Himalayan Yew. Springer, Singapore. DOI: 10.1007/978-981-19-9501-9_22.
Gajurel JP, Shrestha KK, Werth S, Scheidegger C. 2014a. Taxus wallichiana (Himalayan yew) for the livelihood of local people in some protected areas of Nepal. J Nat Hist Mus 28: 1-8. DOI: 10.3126/jnhm.v28i0.14162.
Gajurel JP, Werth S, Shrestha KK, Scheidegger C. 2014b. Species distribution modeling of Taxus wallichiana (Himalayan yew) in Nepal Himalaya. Asian J Conserv Biol 3 (2): 127-134. DOI: 10.3126/jnhm.v28i0.14162.
Government of Vietnam. 2021. Decree No. 84/2021/ND-CP. The Amendments and Supplements to Several Articles of Decree No. 06/2019/ND-CP of the Government on the Management of Forest Plant and Forest Animals, Endangered, Precious, Rare, And Public Execution Estimated International Trade of Endangered Wild Animals and Plants. Hanoi, Vietnam.
Haq SM, Khan I, Malik ZA, Singh B. 2022. Plant diversity and species distribution pattern across the Pir Panjal Mountain forest range in the Western Himalayas. In: Öztürk M, Khan SM, Altay V, Efe R, Egamberdieva D, Khassanov FO. (eds). In: Biodiversity, Conservation and Sustainability in Asia. Springer, Cham. DOI: 10.1007/978-3-030-73943-0_5.
Ho PH. 1999. Cay Co Viet Nam: An Illustrated Flora of Vietnam: Vol. 1 Tu Khuyetthucvat Loatu Hoa-Canh-Roi Den Ho Dau. Nha Xuat Ban Tre, Ho Chi Minh.
Hung VC, Nghia NH. 2011. Study some silvicultural characteristics of T. wallichiana in Lam Dong. J For Sci 2011 (1): 1710-1715. [Vietnamese]
Iqbal J, Meilan R, Khan B. 2020. Assessment of risk, extinction, and threats to Himalayan yew in Pakistan. Saudi J Biol Sci 27 (2): 762-767. DOI: 10.1016/j.sjbs.2019.12.033.
Juyal D, Thawani V, Thaledi S, Joshi M. 2014. Ethnomedical properties of T. wallichiana (Himalayan Yew). J Tradit Complement Med 4 (3): 159-161. DOI: 10.4103/2225-4110.136544.
Khanh DC. 1996. Study Some Structural Features of Evergreen Broadleaf Forest in Huong Son, Ha Tinh, as a Basis for Proposing Silvicultural Technical Measures for Forest Exploitation and Maintenance. Vietnam Academy of Forestry Science, Hanoi.
Luong NT, Hop NV, Quy NV, Hoan VM. 2023. Diversity of plant species for food coloring in Vietnam. Nusantara Biosci 15 (1): 95-105. DOI: 10.13057/nusbiosci/n150112.
Nazir N, Kamili AN, Zargar MY, Shah D. 2020. Field unactment of Taxus wallichiana Zucc. (Himalayan yew) stem cuttings inoculated with selected and beneficial bio-inoculants under nursery conditions. For Res 9: 235. DOI: 10. 35248/2168-9776.20.9.235.
Nimasow G, Nimasow OD, Rawat JS, Tsering G, Litin T. 2016. Remote sensing and GIS-based suitability modeling of medicinal plant (Taxus baccata Linn.) in Tawang District, Arunachal Pradesh, India. Curr Sci 110 (2): 219-227. DOI: 10.18520/cs/v110/i2/219-227.
Pant S, Samant SS. 2008. Population ecology of the endangered Himalayan yew in Khokhan wildlife sanctuary of Northwestern Himalaya for conservation management. J Mt Sci 5: 257-264. DOI: 10.1007/s11629-008-0078-z.
Paul A, Bharali S, Khan ML, and Tripathi OP. 2013. Anthropogenic disturbances led to risk of extinction of Taxus wallichiana Zuccarini, an endangered medicinal tree in Arunachal Himalaya. Nat Areas J 33 (4): 447-454. DOI: 10.3375/043.033.0408.
Plants of the World Online. 2023. https://powo.science.kew.org/
Samant SS. 1999. Diversity, nativity, and endemism of vascular plants in a part of Nanda Devi Biosphere Reserve in West Himalaya I. Himal Biosph Reserves 1 (1&2): 1-28.
Shreshta D. 2018. Population Structure and Microhabitat Preferences of the Himalayan Yew (Taxus wallichiana Zucc.) in Panchase Protected Forest in Central Nepal. [Thesis]. Amrit Campus Tribhuvan University, Kathmandu, Nepal.
Singh JS, Singh SP. 1992. Forest of Himalaya: Structure, Functioning and Impact of Man. Gyanodaya Prakashan, Nainital India.
Sinha D. 2020. Ethnobotanical and pharmacological importance of Taxus wallichiana Zucc. Plant Sci Today 7 (1): 122-134. DOI: 10.14719/pst.2020.7.1.636.
The IUCN Red List of Threatened Species. 2023. www.iucnredlist.org
Trung HN. 2014. Study Some Biological Characteristics of T. wallichiana. As a Basis for Conserving and Developing Precious and Rare Plant Genetic Resources in Phia Oac - Phia Den Natural Reserve - Nguyen Binh District - Cao Bang Province. [Thesis]. Thai Nguyen University of Agriculture and Forestry, Thai Nguyen. [Vietnamese].
Trung TV. 1978. Forest Vegetation of Vietnam. Science and Technology Publishing House, Hanoi, Vietnam.
Trung TV. 1999. Forest Ecosystems in Vietnam. Science and Technology Publishing House, Hanoi, Vietnam.
Uniyal SK. 2013. Bark removal and population structure of T. wallichiana in a temperate mixed conifer forest of Western Himalaya. Environ Monit Assess 185 (4): 2921-2928. DOI: 10.1007/s10661-012-2760-4.
Yousaf A, Hadi R, Khan R, Ibrahim F, Moin H, Rahim S, Hussain M. 2022. Identification of suitable habitat for Taxus wallichiana and Abies pindrow in moist temperate forest using maxent modelling technique. Saudi J Biol Sci 29 (12): 103459. DOI: 10.1016/j.sjbs.2022.103459.