Distribution and conservation status ofMagnolia ovoidea(Magnoliaceae): a Critically Endangered species in Yunnan, China

被引：3
作者：
Han, Chunyan [1 ,2 ,3 ]
Tao, Lidan [1 ,2 ,4 ]
Weibang, Sun [1 ,2 ]
机构：
[1] Chinese Acad Sci, Kunming Inst Bot, Kunming Bot Garden, Kunming 650201, Yunnan, Peoples R China
[2] Chinese Acad Sci, Kunming Inst Bot, Yunnan Key Lab Integrat Conservat Plant Species E, Kunming 650201, Yunnan, Peoples R China
[3] Guizhou Univ Tradit Chinese Med, Guiyang, Guizhou, Peoples R China
[4] Univ Chinese Acad Sci, Beijing, Peoples R China
来源：
ORYX | 2020年 / 54卷 / 04期
关键词：
China; Critically Endangered; endemic; Magnolia ovoidea; Magnoliaceae; Plant Species with an Extremely Small Population; Red List; size structure; POPULATION;
D O I：
10.1017/S0030605318000704
中图分类号：
X176 [生物多样性保护];
学科分类号：
090705 ;
摘要：
Magnolia ovoideais a narrowly endemic, Critically Endangered tree with a fragmented distribution in south-west Yunnan, China. We examined the size structure of this species, documented threats and assessed its extinction risk. We found the species in six locations, all in unprotected areas, in Maguan County. The largest subpopulations are in Donggua Lin and Youfang Po, with 17 and 50 living individuals, respectively. The distribution of the diameter at breast height of theM. ovoideapopulation has an inverse J-shape, indicating a stable size structure. However, the distribution of the height of seedlings is L-shaped, suggesting inhibited regeneration. The natural vegetation is severely fragmented in all six locations, surrounded by roads, farmlands, andAlnus nepalensisorCunninghamia lanceolataplantations. We recommend thatM. ovoideashould be categorized on the IUCN Red List as Critically Endangered based on criteria B2ab(iii) + C2a(i).
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收藏
页码：466 / 469
页数：4
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