Aboveground Biomass Dynamics in the Low-Mountain Dry Grasslands of the Tianshan Mountains
International Journal of Environmental Monitoring and Analysis
Volume 7, Issue 1, February 2019, Pages: 22-26
Received: Mar. 19, 2019;
Published: May 23, 2019
Views 515 Downloads 88
Xiaotao Huang, Key Laboratory of Restoration Ecology for Cold Regions in Qinghai, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China; University of the Chinese Academy of Sciences, Beijing, China
Geping Luo, University of the Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
Hao Wang, University of the Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
Jean Baptiste Nsengiyumva, University of the Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
Follow on us
Identifying the dynamics of aboveground biomass (AB) is vital for effective grassland management, yet knowledge on this phenomenon remains limited in the low-mountain dry grasslands (LMDG) of the Tianshan Mountains. In this study, systematic observations were conducted from 2014 to 2017 to determine AB dynamics in the LMDG of the Tianshan Mountains. To accomplish this, a cutting experiment, an HL20 Bowen ratio system, and TDR300 and WatchDog1400 systems were used. AB dynamics had unique characteristics, because of the influence of the unique environment of this region. AB increased rapidly in spring (April – May), and then increased slowly in summer (June – August) and autumn (September – October). Plants entered dormancy in summer (primarily August). In autumn, plants continued to grow after dormancy, except in years with low precipitation which limited plant growth. Plants generally suffered from water stress in this region. However, in spring, the limiting factor for plant growth was heat, not water. Heat might also be the limiting factor for plant growth in autumn. The results are expected to enhance the understanding of AB dynamics in the LMDG of the Tianshan Mountains, providing data to support local grassland management.
Aboveground Biomass, Low-Mountain Dry Grassland, Water Stress, Soil Volumetric Water Content
To cite this article
Jean Baptiste Nsengiyumva,
Aboveground Biomass Dynamics in the Low-Mountain Dry Grasslands of the Tianshan Mountains, International Journal of Environmental Monitoring and Analysis.
Vol. 7, No. 1,
2019, pp. 22-26.
Liang W, Lu Y, Zhang W, Li S, Jin Z, Ciais P, et al. Grassland gross carbon dioxide uptake based on an improved model tree ensemble approach considering human interventions: global estimation and covariation with climate. Glob. Change Biol. 2017; 23: 2720-2742. doi: 10.1111/gcb.13592.
Deqing H, Lan YU, Yaosheng Z, Xinquan Z. Above-ground biomass and its relationship to soil moisture of natural grassland in the northern slopes of the Qilian Mountains. Acta Pratacult. Sinica 2011; 20: 20-27.
Li F, Zeng Y, Luo J, Ma R, Wu B. Modelling grassland aboveground biomass using a pure vegetation index. Ecol. Indic. 2016; 62: 279-288. doi: 10.1016/j.ecolind.2015.11.005.
Luo G, Han Q, Zhou D, Li L, Chen X, Li Y, et al. Moderate grazing can promote aboveground primary production of grassland under water stress. Ecol. Complex 2012; 11: 126-136. doi: 10.1016/j.ecocom.2012.04.004.
Xi N, Zhang C, Bloor JMG. Species richness alters spatial nutrient heterogeneity effects on above-ground plant biomass. Biol. Lett. 2017; 13. doi: 10.1098/rsbl.2017.0510.
Zhang W, Zhang F, Qi J, Hou F. Modelling impacts of climate change and grazing effects on plant biomass and soil organic carbon in the Qinghai-Tibetan grasslands. Biogeosciences 2017; 14: 5455-5470. doi: 10.5194/bg-14-5455-2017.
Huang X, Luo G, He H, Wang X, Amuti T. Ecological effects of grazing in the Northern Tianshan Mountains. Water 2017; 9: 932-950. doi: 10.3390/w9120932.
Zhao WY, Li JL, Qi JG. Changes in vegetation diversity and structure in response to heavy grazing pressure in the northern Tianshan Mountains, China. J. Arid Environ. 2007; 68: 465-479. doi: 10.1016/j.jaridenv.2006.06.007.
Wang K, Dickinson RE. A review of global terrestrial evapotranspiration: Observation, modelling, climatology, and climatic variability. Rev. Geophys. 2012; 50. doi: 10.1029/2011rg000373.
Huang X, Luo G, Wang X. Land-atmosphere exchange of water and heat in the arid mountainous grasslands of Central Asia during the growing season. Water 2017; 9: 727. doi: 10.3390/w9100727.
Zhu J, Zhang Y, Wang W. Interactions between warming and soil moisture increase overlap in reproductive phenology among species in an alpine meadow. Biol. Lett. 2016; 12. doi: 10.1098/rsbl.2015.0749.
Balachowski JA, Bristiel PM, Volaire FA. Summer dormancy, drought survival andfunctional resource acquisition strategies in California perennial grasses. Annals Bot. 2016; 118: 357-368. doi: 10.1093/aob/mcw109.
Dlamini P, Chivenge P, Manson A, Chaplot V. Land degradation impact on soil organic carbon and nitrogen stocks of sub-tropical humid grasslands in South Africa. Geoderma 2014; 235: 372-381. doi: 10.1016/j.geoderma.2014.07.016.
Arora VK, Chiew FHS, Grayson RB. Effect of sub-grid-scale variability of soil moisture and precipitation intensity on surface runoff and streamflow. J. Geophys. Res.-Atmos. 2001; 106: 17073-17091. doi: 10.1029/2001jd9000371.
Singh A, Khurana P. Molecular and functional characterization of a wheat B2 protein imparting adverse temperature tolerance and influencing plant growth. Frontiers Plant Sci. 2016; 7: 642-661. doi: 10.3389/fpls.2016.00642.