title: Patterns of plant biomass allocation in temperate grasslands across a 2500-km transect in northern China.
abstract: Plant biomass allocation between below- and above-ground parts can actively adapt to the ambient growth conditions and is a key parameter for estimating terrestrial ecosystem carbon (C) stocks. To investigate how climatic variations affect patterns of plant biomass allocation, we sampled 548 plants belonging to four dominant genera (Stipa spp., Cleistogenes spp., Agropyron spp., and Leymus spp.) along a large-scale (2500 km) climatic gradient across the temperate grasslands from west to east in northern China. Our results showed that Leymus spp. had the lowest root/shoot ratios among the each genus. Root/shoot ratios of each genera were positively correlated with mean annual temperature (MAT), and negatively correlated with mean annual precipitation (MAP) across the transect. Temperature contributed more to the variation of root/shoot ratios than precipitation for Cleistogenes spp. (C4 plants), whereas precipitation exerted a stronger influence than temperature on their variations for the other three genera (C3 plants). From east to west, investment of C into the belowground parts increased as precipitation decreased while temperature increased. Such changes in biomass allocation patterns in response to climatic factors may alter the competition regimes among co-existing plants, resulting in changes in community composition, structure and ecosystem functions. Our results suggested that future climate change would have great impact on C allocation and storage, as well as C turnover in the grassland ecosystems in northern China.
authors: State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China ; Graduate University of Chinese Academy of Sciences, Beijing, China.
authors: Wentao
authors: W
authors: Luo
authors: Yong
authors: Y
authors: Jiang
authors: Xiaotao
authors: X
authors: Lü
authors: Xue
authors: X
authors: Wang
authors: Mai-He
authors: MH
authors: Li
authors: Edith
authors: E
authors: Bai
authors: Xingguo
authors: X
authors: Han
authors: Zhuwen
authors: Z
authors: Xu
mesh_terms: D018533:Biomass; D002681:China; D002980:Climate; D055864:Droughts; D017753:Ecosystem; D005843:Geography; D016014:Linear Models; D063245:Plant Development; D018517:Plant Roots / Q000254:growth & development; D018520:Plant Shoots / Q000254:growth & development; D018526:Plant Transpiration / Q000502:physiology; D006109:Poaceae / Q000254:growth & development*; D011891:Rain; D013696:Temperature
references: Philos Trans R Soc Lond B Biol Sci. 2007 Jun 29;362(1482):997-1008
references: 17317645
references: Oecologia. 1996 Nov;108(3):389-411
references: 28307854
references: Oecologia. 1997 Oct;112(3):285-299
references: 28307475
references: Science. 2002 Jun 14;296(5575):1923
references: 12065803
references: Am J Bot. 2002 Oct;89(10):1609-15
references: 21665588
references: Science. 2002 Feb 22;295(5559):1517-20
references: 11859193
references: Oecologia. 2012 Jun;169(2):341-52
references: 22139428
references: Planta. 2006 Oct;224(5):1080-90
references: 16685524
references: New Phytol. 2006;171(1):27-40
references: 16771980
references: Sci China Life Sci. 2010 Jul;53(7):851-7
references: 20697874
references: Oecologia. 2012 Feb;168(2):301-10
references: 21826456
references: New Phytol. 2012 Jan;193(1):30-50
references: 22085245
references: Photosynth Res. 2003;77(2-3):209-25
references: 16228377
references: Proc Natl Acad Sci U S A. 2004 Jul 27;101(30):11001-6
references: 15213326
references: Glob Chang Biol. 2013 Jan;19(1):184-96
references: 23504730
references: Plant Cell Environ. 2007 Sep;30(9):1086-106
references: 17661749
references: PLoS One. 2012;7(3):e33996
references: 22470506