Knowledge Management System of Northwest Institute of Plateau Biology, CAS
| Response of Polygonum viviparum species and community level to long-term livestock grazing in alpine shrub meadow in Qinghai-Tibet Plateau | |
| Zhu, Zhi-Hong1; Lundholm, Jeremy2; Li, Yingnian3; Wang, Xiaoan1 | |
| 2008-06-01 | |
| 发表期刊 | JOURNAL OF INTEGRATIVE PLANT BIOLOGY
 |
| 卷号 | 50期号:6页码:659-672 |
| 文章类型 | Article |
| 摘要 | Grazing by domestic herbivores is generally recognized as a major ecological factor and an important evolutionary force in grasslands. Grazing has both extensive and profound effects on individual plants and communities. We investigated the response patterns of Polygonum viviparum species and the species diversity of an alpine shrub meadow in response to long-term livestock grazing by a field manipulative experiment controlling livestock numbers on the Qinghai-Tibet Plateau in China. Here, we hypothesize that within a range of grazing pressure, grazing can alter relative allocation to different plant parts without changing total biomass for some plant species if there is life history trade-offs between plant traits. The same type of communities exposed to different grazing pressures may only alter relative species' abundances or species composition and not vary species diversity because plant species differ in resistant capability to herbivory. The results show that plant height and biomass of different organs differed among grazing treatments but total biomass remained constant. Biomass allocation and absolute investments to both reproduction and growth decreased and to belowground storage increased with increased grazing pressure, indicating the increasing in storage function was attained at a cost of reducing reproduction of bulbils and represented an optimal allocation and an adaptive response of the species to long-term aboveground damage. Moreover, our results showed multiform response types for either species groups or single species along the gradient of grazing intensity. Heavy grazing caused a 13.2% increase in species richness. There was difference in species composition of about 18%-20% among grazing treatment. Shannon-Wiener (H') diversity index and species evenness (E) index did not differ among grazing treatments. These results support our hypothesis.; Grazing by domestic herbivores is generally recognized as a major ecological factor and an important evolutionary force in grasslands. Grazing has both extensive and profound effects on individual plants and communities. We investigated the response patterns of Polygonum viviparum species and the species diversity of an alpine shrub meadow in response to long-term livestock grazing by a field manipulative experiment controlling livestock numbers on the Qinghai-Tibet Plateau in China. Here, we hypothesize that within a range of grazing pressure, grazing can alter relative allocation to different plant parts without changing total biomass for some plant species if there is life history trade-offs between plant traits. The same type of communities exposed to different grazing pressures may only alter relative species' abundances or species composition and not vary species diversity because plant species differ in resistant capability to herbivory. The results show that plant height and biomass of different organs differed among grazing treatments but total biomass remained constant. Biomass allocation and absolute investments to both reproduction and growth decreased and to belowground storage increased with increased grazing pressure, indicating the increasing in storage function was attained at a cost of reducing reproduction of bulbils and represented an optimal allocation and an adaptive response of the species to long-term aboveground damage. Moreover, our results showed multiform response types for either species groups or single species along the gradient of grazing intensity. Heavy grazing caused a 13.2% increase in species richness. There was difference in species composition of about 18%-20% among grazing treatment. Shannon-Wiener (H') diversity index and species evenness (E) index did not differ among grazing treatments. These results support our hypothesis. |
| 关键词 | Alpine Shrub Meadow Biomass Allocation Grazing Response Relative Species' Abundances Species Diversity |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 学科领域 | 生物化学 ; 分子生物学 |
| 关键词[WOS] | MAMMALIAN HERBIVORY ; PLANT-RESPONSES ; OVERCOMPENSATION ; ACCUMULATION ; ENVIRONMENTS ; REPRODUCTION ; DEFOLIATION ; COMPETITION ; MANAGEMENT ; TOLERANCE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Biochemistry & Molecular Biology ; Plant Sciences |
| WOS类目 | Biochemistry & Molecular Biology ; Plant Sciences |
| WOS记录号 | WOS:000256532500004 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://210.75.249.4/handle/363003/1212 |
| 专题 | 中国科学院西北高原生物研究所 |
| 作者单位 | 1.Shaanxi Normal Univ, Coll Life Sci, Xian 710062, Peoples R China 2.St Marys Univ, Dept Biol, Environm Studies Program, Halifax, NS B3H 3C3, Canada 3.Chinese Acad Sci, NW Inst Plateau Biol, Xining 810008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Zhi-Hong,Lundholm, Jeremy,Li, Yingnian,et al. Response of Polygonum viviparum species and community level to long-term livestock grazing in alpine shrub meadow in Qinghai-Tibet Plateau[J]. JOURNAL OF INTEGRATIVE PLANT BIOLOGY,2008,50(6):659-672. |
| APA | Zhu, Zhi-Hong,Lundholm, Jeremy,Li, Yingnian,&Wang, Xiaoan.(2008).Response of Polygonum viviparum species and community level to long-term livestock grazing in alpine shrub meadow in Qinghai-Tibet Plateau.JOURNAL OF INTEGRATIVE PLANT BIOLOGY,50(6),659-672. |
| MLA | Zhu, Zhi-Hong,et al."Response of Polygonum viviparum species and community level to long-term livestock grazing in alpine shrub meadow in Qinghai-Tibet Plateau".JOURNAL OF INTEGRATIVE PLANT BIOLOGY 50.6(2008):659-672. |
| 条目包含的文件 | 下载所有文件 | |||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Response of Polygonu（179KB） | 开放获取 | 使用许可 | 浏览 下载 | |||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论