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农学学报 ›› 2019, Vol. 9 ›› Issue (4): 66-73.doi: 10.11923/j.issn.2095-4050.cjas19030018

• 土壤肥料 资源环境 生态 • 上一篇    下一篇

青藏高原高寒草地物种多样性的海拔梯度格局及其对模拟增温的响应

温静, 张世雄, 杨晓艳, 秦瑞敏, 徐满厚   

  1. 太原师范学院地理科学学院
  • 收稿日期:2019-03-14 修回日期:2019-02-15 接受日期:2019-03-14 出版日期:2019-04-19 发布日期:2019-04-19
  • 通讯作者: 徐满厚 E-mail:xumanhou@163.com
  • 基金资助:
    国家自然科学基金青年科学基金项目“气候变暖背景下青藏高原高寒草地根系生物量的迁移变化研究”(41501219),太原师范学院研究生教育改革研究课题“《学术论文撰写课》优化模式探讨”(SYYJSJG-1707)

Species Diversity in Alpine Meadow of the Qinghai-Tibet Plateau: Altitudinal Gradient Pattern and Its Response to Simulated Warming

  • Received:2019-03-14 Revised:2019-02-15 Accepted:2019-03-14 Online:2019-04-19 Published:2019-04-19

摘要: 为了研究青藏高原高寒植被的空间分布格局及其对全球变暖的响应,以青藏高原高寒草地为研究对象,选取8个不同海拔梯度的典型试验区,每个试验区采取对照和增温2种处理。结果表明:(1)海拔梯度<4000 m的高寒草地禾本科为主要优势科,海拔梯度>4000 m的高寒草地莎草科为主要优势科;(2)中等海拔地区的高寒草地物种多样性相对较高,低海拔地区的高寒草地物种多样性高于高海拔地区;(3)主动增温和被动增温对青藏高原高寒草地物种多样性产生不同影响,但整体上均降低了物种多样性,且群落中优势科(禾本科和莎草科)对增温的响应更为敏感。因此,增温和海拔梯度对青藏高原高寒草地物种多样性产生重要影响,两者都降低了物种多样性。

关键词: 高油高产, 高油高产, 大豆品种, 合农72, 选育

Abstract: To study the spatial distribution pattern of alpine vegetation ecosystem in the Qinghai-Tibet Plateau (QTP) and its responses to global climate change, we took alpine meadows in the QTP as the research object, and selected 8 typical experimental areas at different elevations, with each area setting both contrast samples and warming samples. The results show that: (1) Gramineae is the main dominant family in the experimental areas lower than 4000 m, but Cyperaceae is the main dominant family in the areas higher than 4000 m; (2) the species diversity is relatively high in the middle elevation in the experimental areas, and the species diversity in the low elevation area is higher than that in the high elevation; (3) active warming and passive warming have different effects on the species diversity of alpine meadows in the QTP, but warming reduces the species diversity in general, and the dominant families in the community (Gramineae and Cyperaceae ) are more sensitive to warming. Therefore, both warming and elevations have important effects on the species diversity of alpine meadows in the QTP and reduce the species diversity of alpine meadow