Sensitive Indicators of Zonal Stipa Species to Changing Temperature and Precipitation in Inner Mongolia Grassland, China

Frontiers in Plant Science
Xiaomin LvXiliang Song

Abstract

Climate change often induces shifts in plant functional traits. However, knowledge related to sensitivity of different functional traits and sensitive indicator representing plant growth under hydrothermal change remains unclear. Inner Mongolia grassland is predicted to be one of the terrestrial ecosystems which are most vulnerable to climate change. In this study, we analyzed the response of four zonal Stipa species (S. baicalensis, S. grandis, S. breviflora, and S. bungeana) from Inner Mongolia grassland to changing temperature (control, increased 1.5, 2, 4, and 6°C), precipitation (decreased 30 and 15%, control, increased 15 and 30%) and their combined effects via climate control chambers. The relative change of functional traits in the unit of temperature and precipitation change was regarded as sensitivity coefficient and sensitive indicators were examined by pathway analysis. We found that sensitivity of the four Stipa species to changing temperature and precipitation could be ranked as follows: S. bungeana > S. grandis > S. breviflora > S. baicalensis. In particular, changes in leaf area, specific leaf area and root/shoot ratio could account for 86% of the changes in plant biomass in the four Stipa species. Also these th...Continue Reading

References

Feb 24, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Le KangOsbert Jianxin Sun
Jan 5, 2011·Trends in Ecology & Evolution·Lisa A DonovanHans de Kroon
Feb 15, 2012·Proceedings of the National Academy of Sciences of the United States of America·Joseph M CraineNathaniel A Brunsell
Nov 10, 2013·Frontiers in Plant Science·Louise H ComasDavid A Dierig
Apr 26, 2014·Science·Stephen R PalumbiRachael A Bay

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