Long-term vegetation dynamics driven by climatic variations in the Inner Mongolia grassland: findings from 30-year monitoring
Long-term vegetation dynamics driven by climatic variations in the Inner Mongolia grassland: findings from 30-year monitoring
复制标题
内蒙古草原气候变化驱动的长期植被动态：30年监测结果
DOI：
10.1007/s10980-014-0068-1
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发表时间：
2015-11-01
影响因子：
5.2
通讯作者：
Wang, Lixin
中科院分区：
文献类型：
--
作者：
Li, Zhiyong;Ma, Wenhong;Wang, Lixin
对植物群落组成和生产力的长期监测为生态系统如何应对气候变化提供了证据。研究了1981-2011年内蒙古温带草原禁牧后植物物种丰富度和群落组成的长期动态。在这30年中，SR在1981 - 1991年间增加，然后在1992 - 2011年间下降，主要是由于降雨减少和温度升高导致的C-3杂类草的损失。植物功能群的相对丰度（以相对生物量（RB）衡量）也表现出类似的时间模式。优势种和功能群的RB都发生了变化。在过去20年的研究期间，随着气温的升高和降雨量的减少，C-3杂类草的丰度下降，而C-4草增加。然而，灌木物种并没有表现出任何显着的模式，在他们的动态。植被指数分析表明，内蒙古草原的物种组成和植物相对多度受降水和温度的共同影响。我们的研究结果有助于我们更好地了解草原生态系统如何应对蒙古高原未来的气候变化，预计未来几十年气候将变得更加干燥和炎热。
Long-term monitoring of plant community composition and productivity provides evidence of how ecosystems respond to climate change. This study investigated the long-term (1981-2011) dynamics of plant species richness (SR) and community composition of a temperate grassland in Inner Mongolia, China, after the exclusion of livestock grazing. During the 30 years, SR increased between 1981 and 1991, and then declined from 1992 to 2011 mainly because of the loss of C-3 forbs as a result of decreasing rainfall and increasing temperature. The relative abundance, measured as relative biomass (RB), of plant functional groups also showed a similar temporal pattern. There was a shift in the RB of both dominant species and functional groups. As temperature increased with decreasing rainfall during the last 20 years of the study period, the abundance of C-3 forbs decreased, while C-4 grasses increased. However, shrub species did not show any significant pattern in their dynamics. Redundancy analysis indicated that the species composition and plant relative abundance of the Inner Mongolian grassland were affected by both precipitation and temperature. Our findings help us better understand how grassland ecosystems respond to future climate change on the Mongolian Plateau where the climate is projected to be drier and hotter in the upcoming decades.