Primary production and rain use efficiency across a precipitation gradient on the Mongolia Plateau

Ecology
Yongfei BaiXingguo Han

Abstract

Understanding how the aboveground net primary production (ANPP) of arid and semiarid ecosystems of the world responds to variations in precipitation is crucial for assessing the impacts of climate change on terrestrial ecosystems. Rain-use efficiency (RUE) is an important measure for acquiring this understanding. However, little is known about the response pattern of RUE for the largest contiguous natural grassland region of the world, the Eurasian Steppe. Here we investigated the spatial and temporal patterns of ANPP and RUE and their key driving factors based on a long-term data set from 21 natural arid and semiarid ecosystem sites across the Inner Mongolia steppe region in northern China. Our results showed that, with increasing mean annual precipitation (MAP), (1) ANPP increased while the interannual variability of ANPP declined, (2) plant species richness increased and the relative abundance of key functional groups shifted predictably, and (3) RUE increased in space across different ecosystems but decreased with increasing annual precipitation within a given ecosystem. These results clearly indicate that the patterns of both ANPP and RUE are scale dependent, and the seemingly conflicting patterns of RUE in space vs. time ...Continue Reading

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Citations

Oct 10, 2012·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Osvaldo E SalaDebra Peters
Oct 10, 2012·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Zhichun Lan, Yongfei Bai
Feb 9, 2013·Journal of Environmental Management·Lin HuangJunbang Wang
Aug 11, 2010·Science China. Life Sciences·JingYun FangHaiHua Shen
Aug 11, 2010·Science China. Life Sciences·WenHong MaAnwar Mohammat
Feb 5, 2010·The Science of the Total Environment·Yugang WangXinping Wang
Jan 23, 2015·Global Change Biology·Mengtian HuangYingping Wang
Oct 19, 2016·Ecological Applications : a Publication of the Ecological Society of America·J Gonzalo N IrisarriKevin E Mueller
Sep 14, 2016·The Science of the Total Environment·Dailiang PengYanhong Wu
Nov 22, 2016·Scientific Reports·Juanjuan HanShiqiang Wan

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