青藏高原特有禾本科植物三蕊草受威胁等级评估

doi:10.3724/SP.J.1003.2012.05016

摘要/Abstract

摘要：

青藏高原特有的禾本科单种属植物三蕊草(Sinochasea trigyna)是国家II级重点保护野生植物。由于研究材料较难获得, 一直以来缺乏该单种属植物的各项研究资料。本文在野外调查的基础上, 根据IUCN红色名录的国际评估标准, 评估该物种的受威胁等级为易危(Vulnerable, VU), 评估结果为VU B2ab(iii)。本文还初次报道了该种植物的染色体为小型染色体, 数目为2n = 2x = 22。

关键词: 青藏高原, Sinochasea trigyna, 细胞学, 濒危

Abstract

Sinochasea trigyna Keng (Family Poaceae) is endemic to the Qinghai-Tibet Plateau, and is listed as a second class national protected wild plant. The data about this monotypic genus is very scanty since its material difficult to acquire. According to the criterion of IUCN, the endangered level of S. trigyna is evaluated as VU B2ab(iii) based on the data from field investigations, herbarium records and the published literature. In this paper, we also reported the chromosome number (i.e. 2n = 22) and the type microchromosome of S. trigyna, which are both novel findings.

Key words: Qinghai-Tibet Plateau, Sinochasea trigyna, cytology, endangered

李伟伟, 张慧, 赵莉娜, 包颖, 陈文俐 (2012) 青藏高原特有禾本科植物三蕊草受威胁等级评估. 生物多样性, 20, 769-773. DOI: 10.3724/SP.J.1003.2012.05016.

Weiwei Li, Hui Zhang, Lina Zhao, Ying Bao, Wenli Chen (2012) An evaluation of the endangerment status of Sinochasea trigyna (Poac- eae) endemic to the Qinghai-Tibet Plateau. Biodiversity Science, 20, 769-773. DOI: 10.3724/SP.J.1003.2012.05016.

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链接本文: https://www.biodiversity-science.net/CN/10.3724/SP.J.1003.2012.05016

https://www.biodiversity-science.net/CN/Y2012/V20/I6/769

图/表 4

参考文献 16

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居群编号 Population	地点 Locality	生境 Habitat	海拔 Altitude (m)	分布面积 Population area (m²)	居群大小(株) Population size (individual)	凭证标本 Voucher	染色体数目 Chromosome number
S1	四川稻城 Daocheng, Sichuan	杜鹃灌丛草甸的多石地带 Stony land among Rhododendron shrub meadow	4,430	1,000	~10,000	陈文俐, 张慧208 Chen Wenli, Zhang Hui 208	2n = 22
S2	西藏定日 Tingri, Tibet	山坡冲积沟, 多石, 锦鸡儿灌丛草甸 Stony land, diluvial ditches among Caragana shrub meadow	4,881	100	~500	陈文俐, 张慧372 Chen Wenli, Zhang Hui 372	2n = 22
S3	西藏申扎 Xainza, Tibet	雪山下, 阳坡, 多石 Stony land of sunny slope of jokul	4,729	1,000	~300	陈文俐, 张慧410 Chen Wenli, Zhang Hui 410	2n = 22
S4	西藏察隅 Zayü,Tibet	山顶草甸、杜鹃灌丛 Rhododendron shrub meadow	4,803	200	~100	陈文俐, 张慧103 Chen Wenli, Zhang Hui 103
S5	西藏左贡 Zogong, Tibet	圆柏灌丛间, 小溪旁, 砾石间 Stony land along the stream among Sabina shrub meadow	4,900	80	~300	陈文俐, 张慧115 Chen Wenli, Zhang Hui 115
S6	西藏南木林 Namling, Tibet	阳坡草甸、冲积沟多石处 Stony land along the diluvial ditches of sunny slope meadow	5,135	10,000	~300	陈文俐, 张慧411 Chen Wenli, Zhang Hui 411
S7	西藏浪卡子 Nagarzê, Tibet	阳坡草地、溪旁、石缝间、冲积沟 Rock crevices and stony land along the diluvial ditches and stream of sunny grass slope	5,006	1,600	~150	陈文俐, 张慧417 Chen Wenli, Zhang Hui 417
居群平均值 Average				1,997	~1,660

居群编号 Population	地点 Locality	生境 Habitat	海拔 Altitude (m)	分布面积 Population area (m²)	居群大小(株) Population size (individual)	凭证标本 Voucher	染色体数目 Chromosome number
S1	四川稻城 Daocheng, Sichuan	杜鹃灌丛草甸的多石地带 Stony land among Rhododendron shrub meadow	4,430	1,000	~10,000	陈文俐, 张慧208 Chen Wenli, Zhang Hui 208	2n = 22
S2	西藏定日 Tingri, Tibet	山坡冲积沟, 多石, 锦鸡儿灌丛草甸 Stony land, diluvial ditches among Caragana shrub meadow	4,881	100	~500	陈文俐, 张慧372 Chen Wenli, Zhang Hui 372	2n = 22
S3	西藏申扎 Xainza, Tibet	雪山下, 阳坡, 多石 Stony land of sunny slope of jokul	4,729	1,000	~300	陈文俐, 张慧410 Chen Wenli, Zhang Hui 410	2n = 22
S4	西藏察隅 Zayü,Tibet	山顶草甸、杜鹃灌丛 Rhododendron shrub meadow	4,803	200	~100	陈文俐, 张慧103 Chen Wenli, Zhang Hui 103
S5	西藏左贡 Zogong, Tibet	圆柏灌丛间, 小溪旁, 砾石间 Stony land along the stream among Sabina shrub meadow	4,900	80	~300	陈文俐, 张慧115 Chen Wenli, Zhang Hui 115
S6	西藏南木林 Namling, Tibet	阳坡草甸、冲积沟多石处 Stony land along the diluvial ditches of sunny slope meadow	5,135	10,000	~300	陈文俐, 张慧411 Chen Wenli, Zhang Hui 411
S7	西藏浪卡子 Nagarzê, Tibet	阳坡草地、溪旁、石缝间、冲积沟 Rock crevices and stony land along the diluvial ditches and stream of sunny grass slope	5,006	1,600	~150	陈文俐, 张慧417 Chen Wenli, Zhang Hui 417
居群平均值 Average				1,997	~1,660