首 页 网络介绍 CERN新闻 规章制度 在研项目 论文与出版物 学术动态 生态知识 人员招聘 人员组成 English

    CERN新闻
   综合新闻
   科研新闻
   国际前沿
   友好往来
   大事记
   中国生态大讲堂
   CERN科技贡献奖
   CERN综合评估
   国际长期生态学会议资料
   生态系统研究与管理简报
   IUCN生态系统管理简报

 中国生态大讲堂
鄂尔多斯生态站人员在草地植物共存机制方面的研究被Journal of Vegetation Science接收发表
关键字:草地,植物共存,沙埋,降水,气候波动   时间: 2016-10-26  点击率: 78099
  摘 要: 叶学华等. 2016. 植物对沙埋、降水增强和气候波动响应的种间差异促进了植物共存. Journal of Vegetation Science. doi:10.1111/jvs.12464. Ye XH et al. 2016. differential plant species responses to interactions of sand burial, precipitation enhancement and climatic variation promote co-existence in Chinese stepe vegetation. 沙埋和降水对干旱风沙区植被的建成具有重要的作用。二者在时空异质性非常高,而不同的植物种对沙埋和降水变化有着不同的适应能力,从而在群落中占据不同的生态位,因此,我们假设在干旱风沙区沙埋和降水变化是植物群落物种共存的一种促进机制。在鄂尔多斯生态站开展的一个2年的野外控制实验结果表明,物种、沙埋和降水增强对植物群落优势种的盖度具有多种交互作用,同时这几个因子的作用也存在着显著的年内或年际间的变化。这意味着干旱风沙区植物群落中植物种的共存可以通过它们对沙埋和降水及气候波动的不同适应能力或者说是它们占据的不同生态们来解释。 Aims: Sand burial and precipitation play important roles in vegetation of inland deserts and desertified areas, and both are under strong influence of climate and land-use change. Sand deposition and precipitation both vary greatly in space and time, and different plant species, with diverse adaptations, occupy different niches along spatial gradients in the combination of sand and water availability dynamics.We hypothesized that species specificity in spatial and temporal niche occupation along such gradients is a mechanism for their co-existence and, thereby, a driver and stabilizer of biodiversity in dry, sandy areas.  Location: Ordos Plateau, China.  Methods: We conducted a 2-yr field experiment with factorial treatments of precipitation (control, slight enhancement, strong enhancement) and sand addition (control, medium addition, large addition). Plant cover of the six dominant species was followed over different seasons, as we expected different species to benefit from different treatments in different seasons and years with different weather regimes.  Results: Sand burial alone significantly affected plant cover of all six dominant species, while precipitation enhancement had no significant effect. Effects of sand burial on plant cover changed overall during the two hydrologically contrasting years. Our key finding was that thereweremultiple significant two- and three-way interactions between species, sand burial and precipitation enhancement on plant cover, while there were also multiple two- and three-way interactions involving species, sand burial or precipitation treatment with year and/or season.  Conclusion: Our results supported our hypothesis, i.e. the co-existence of species in a semi-arid sand dune can be explained from the different niches they occupy in terms of seasonal and year-to-year variation in precipitation in combination with sand deposition regime. The interactions of these drivers on plant coverwith experimental enhancement of precipitation, mimicking a realistic scenario for this region, suggest that shifts in species composition are to be expected this century.More generally, our findings advance our understanding of what drives species co-existence and thereby biodiversity, nowand in the future.
相关文章:
中国草学会草地资源与管理专业委员会学术交流暨换届大会圆满召开
中国西部年降水量出现普遍增加趋势
中国草学会草地资源与利用专业委员会2006年第5次全国学术研讨会正式通知
中德研究结果:20世纪青藏高原东北部创千年来降水最高纪录
长江流域8月份降水量创历史新低
鄂尔多斯生态站人员在草地植物共存机制方面的研究被Journal of Vegetation Science接收发表
荷兰阿姆斯特丹自由大学Cornelissen教授访问鄂尔多斯站
蒙古国基础实验生物学研究所Tuvshingtogtokh Indree 教授一行访问鄂尔多斯生态站
鄂尔多斯生态站人员在沙埋和降水对植物和土壤碳的影响方面的研究被Science of the Total Environment接受发表
蒙古国科研人员访问鄂尔多斯生态站
相关文章分页:  共 1 页 10 条记录 9 3[1]4 :

[关闭窗口]
中国生态系统研究网络 版权所有
| 网络介绍 | 联系方式 | 网站地图 |