Effects of precipitation changes on the precipitation use efficiency and aboveground productivity of alpine steppe-meadow on northern Tibetan Plateau, China.

doi:10.13287/j.1001-9332.201806.009

Abstract

Abstract: Total amount, distribution pattern and occurrence time of precipitation determine the water condition of alpine vegetation growth on the Tibetan Plateau, China. Precipitation use efficiency (the ratio of aboveground productivity to precipitation, PUE) is an effective indicator for the relationship between precipitation and vegetation productivity. In this study, we calculated aboveground net primary productivity (ANPP) of an alpine steppe-meadow in northern Tibetan Plateau from 2000 to 2016 based on the correlation model between long-term monitoring biomass data and enhanced vegetation index (EVI) in Damxung. Meteorological data during the same period was also analyzed. Growing season precipitation (GSP) represented the amount of precipitation, improved precipitation concentrated index (PCI) indicated their distribution pattern in the growing season, and precipitation centroid (PC) represented the time of precipitation occurrence. Structural equation model was used to explore the effects of climatic factors on PUE and ANPP, with the consideration of growing season temperature (GST). Results showed that ANPP of this alpine steppe-meadow was mainly controlled by precipitation during the growing season. GSP and ANPP showed significantly positive correlation, whereas the correlation of GST with PUE and ANPP was not significant. PCI and PUE showed significantly positive correlation, which indicated that concentrated distribution of precipitation was beneficial to the increase of PUE. Indirect coefficient between PCI and ANPP was greater than direct coefficient, indicating that PCI influenced ANPP through PUE. Changes of precipitation concentrated time did not show significant effect on PUE and ANPP. Our results suggested that under the rapid climate warming on the Tibetan Plateau, future changes of precipitation and their concentration would have important impacts on aboveground productivity of the alpine grassland.

WANG Zhi-peng, ZHANG Xian-zhou, HE Yong-tao, SHI Pei-li, ZU Jia-xing, NIU Ben, LI Meng. Effects of precipitation changes on the precipitation use efficiency and aboveground productivity of alpine steppe-meadow on northern Tibetan Plateau, China.[J]. Chinese Journal of Applied Ecology, 2018, 29(6): 1822-1828.

References

[1] Keeling CD, Chin JFS, Whorf TP. Increased activity of northern vegetation inferred from atmospheric CO₂ mea-surements. Nature, 1996, 382: 146-149
[2] Sun H-L (孙鸿烈), Zheng D (郑度), Yao T-D (姚檀栋), et al. Protection and construction of the national ecological security shelter zone on Tibetan Plateau. Acta Geographica Sinica (地理学报), 2012, 67(1): 3-12 (in Chinese)
[3] Yao TD, Thompson LG, Mosbrugger V, et al. Third Pole environment (TPE). Environmental Development, 2012, 3: 52-64
[4] Li D-M (李东明), Guo Z-G (郭正刚), An L-Z (安黎哲), et al. Assessment on vegetation capacity of several grassland ecosystems under destroyed disturbance in permafrost regions of Qinghai-Tibet Plateau. Chinese Journal of Applied Ecology (应用生态学报), 2008, 19(10): 2182-2188 (in Chinese)
[5] Yu G (于格), Lu C-X (鲁春霞), Xie G-D (谢高地). Seasonal dynamics of ecosystem services of grassland in Qinhai-Tibetan Plateau. Chinese Journal of Applied Ecology (应用生态学报), 2007, 18(1): 47-51 (in Chinese)
[6] IPCC. Climate Change 2013: The Scientific Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge, UK: Cambridge University Press, 2013
[7] Piao SL, Cui MD, Chen AP, et al. Altitude and temperature dependence of change in the spring vegetation green-up date from 1982 to 2006 in the Qinghai-Xizang Plateau. Agricultural and Forest Meteorology, 2011, 151: 1599-1608
[8] Rangwala I, Miller JR, Xu M. Warming in the Tibetan Plateau: Possible influences of the changes in surface water vapor. Geophysical Research Letters, 2009, 36: 295-311
[9] Shen MG, Piao SL, Jeong SJ, et al. Evaporative cooling over the Tibetan Plateau induced by vegetation growth. Proceedings of the National Academy of Sciences of the United States of America, 2015, 112: 9299-9304
[10] Li F, Zhao W, Liu H. Productivity responses of desert vegetation to precipitation patterns across a rainfall gradient. Journal of Plant Research, 2015, 128: 283-294
[11] Hao YB, Wang YF, Mei XR, et al. The response of ecosystem CO₂ exchange to small precipitation pulses over a temperate steppe. Plant Ecology, 2010, 209: 335-347
[12] Bai Y-F (白永飞). Influence of seasonal distribution of precipitation on primary productivity of Stipa krylovii community. Chinese Journal of Plant Ecology (植物生态学报), 1999, 23(2): 155-160 (in Chinese)
[13] Zhou R (周睿), Yang Y-H (杨元合), Fang J-Y (方精云). Responses of vegetation activity to precipitation variation on the Tibetan Plateau. Acta Scientiarum Naturalium Universitatis Pekinensis (北京大学学报), 2007, 43(6): 771-775 (in Chinese)
[14] Liu X-D (刘晓东), Cheng Z-G (程志刚), Zhang R (张冉). The A1B scenario projection for climate change over the Tibetan Plateau in the next 30-50 years. Plateau Meteorology (高原气象), 2008, 28(3): 475-484 (in Chinese)
[15] Wang J-J (王纪军), Pei T-F (裴铁璠), Gu W-L (顾万龙), et al. Non-uniformity index of annual precipitation distribution. Chinese Journal of Ecology (生态学杂志), 2007, 26(9): 1364-1368 (in Chinese)
[16] Ding M-J (丁明军), Zhang Y-L (张镱锂), Liu L-S (刘林山), et al. Seasonal time lag response of NDVI to temperature and precipitation change and its spatial characteristics in Tibetan Plateau. Progress in Geography (地理科学进展), 2010, 29(4): 507-512 (in Chinese)
[17] Lu Q (陆晴), Wu S-H (吴绍洪), Zhao D-S (赵东升). Variations in alpine grassland cover and its correlation with climate variables on the Qinghai-Tibet Plateau in 1982-2013. Scientia Geographica Sinica (地理科学), 2017, 37(2): 292-300 (in Chinese)
[18] Paruelo JM, Lauenroth WK, Burke IC, et al. Grassland precipitation-use efficiency varies across a resource gradient. Ecosystems, 1999, 2: 64-68
[19] Hu ZM, Yu GR, Fu YL, et al. Effects of vegetation control on ecosystem water use efficiency within and among four grassland ecosystems in China. Global Change Biology, 2008, 14: 1609-1619
[20] Huxman TE, Smith MD, Fay PA, et al. Convergence across biomes to a common rain-use efficiency. Nature, 2004, 429: 651-654
[21] Mi Z-R (米兆荣), Chen L-T (陈立同), Zhang Z-H (张振华), et al. Alpine grassland water use efficiency based on annual precipitation, growing season precipitation and growing season evapotranspiration. Chinese Journal of Plant Ecology (植物生态学报), 2015, 39(7): 649-660 (in Chinese)
[22] Hu ZM, Yu GR, Fan JW, et al. Precipitation-use efficiency along a 4500-km grassland transect. Global Ecology and Biogeography, 2010, 19: 842-851
[23] Yang YH, Fang JY, Fay PA, et al. Rain use efficiency across a precipitation gradient on the Tibetan Plateau. Geophysical Research Letters, 2010, 37: 78-82
[24] Ye H (叶辉), Wang J-B (王军邦), Huang M (黄玫), et al. Spatial pattern of vegetation precipitation use efficiency and its response to precipitation and temperature on the Qinghai-Xizang Plateau of China. Chinese Journal of Plant Ecology (植物生态学报), 2013, 36(12): 1237-1247 (in Chinese)
[25] Guo Q (郭群), Hu Z-M (胡中民), Li X-R (李轩然), et al. Effects of precipitation timing on aboveground net primary productivity in Inner Mongolia temperate steppe. Acta Ecologica Sinica (生态学报), 2013, 33(15): 4808-4817 (in Chinese)
[26] Zong N (宗宁), Chai X (柴曦), Shi P-L (石培礼), et al. Responses of plant community structure and species composition to warming and N addition in an alpine meadow, Northern Tibetan Plateau, China. Chinese Journal of Applied Ecology (应用生态学报), 2016, 27(12): 3739-3748 (in Chinese)
[27] Li X (李翔), Wang Z (王忠), Zhao J-X (赵景学), et al. Altitudinal variations in the sensitivity of alpine meadow productivity to temperature and precipitation changes along the southern slope of Nyainqentanglha Mountains. Acta Ecologica Sinica (生态学报), 2017, 37(17): 5591-5601 (in Chinese)
[28] Shi PL, Sun XM, Xu LL, et al. Net ecosystem CO₂ exchange and controlling factors in a steppe: Kobresia meadow on the Tibetan Plateau. Science in China Series D: Earth Sciences, 2006, 151: 207-218
[29] Zhao GS, Shi PL, Zong N, et al. Declining precipitation enhances the effect of warming on phenological variation in a semiarid Tibetan meadow steppe. Journal of Resources and Ecology, 2017, 8: 50-56
[30] Mi Z-R (米兆荣), Zhang Y-S (张耀生), Zhao X-Q (赵新全), et al. Comparison NDVI with EVI in the herbage fresh weight estimation and vegetation dynamics for alpine grassland. Pratacultural Science (草业科学), 2010, 27(6): 13-19 (in Chinese)
[31] Shi Y, Wang Y, Ma Y, et al. Field-based observations of regional-scale, temporal variation in net primary production in Tibetan alpine grasslands. Biogeosciences, 2014, 11: 16843-16878
[32] Longobardi A, Buttafuoco G, Caloiero T, et al. Spatial and temporal distribution of precipitation in a Mediterranean area (southern Italy). Environmental Earth Sciences, 2016, 75: 324-331
[33] Huang J, Liu F, Xue Y, et al. The spatial and temporal analysis of precipitation concentration and dry spell in Qinghai, northwest China. Stochastic Environmental Research and Risk Assessment, 2015, 29: 1403-1411
[34] Huang X-Z (黄兴召), Xu C-H (许崇华), Xu J (徐俊), et al. Structural equation model analysis of the relationship between environmental and stand factors and net primary productivity in Cunninghamia lanceolata forests. Acta Ecologica Sinica (生态学报), 2017, 37(7): 2274-2281 (in Chinese)
[35] Guo Q, Hu Z, Li S, et al. Contrasting responses of gross primary productivity to precipitation events in a water-limited and a temperature-limited grassland ecosystem. Agricultural and Forest Meteorology, 2015, s214-215: 169-177
[36] Zhu JT, Zhang YJ, Jiang L. Experimental warming drives a seasonal shift of ecosystem carbon exchange in Tibetan alpine meadow. Agricultural and Forest Meteoro-logy, 2017, 233: 242-249
[37] Jia X, Zha T, Gong J, et al. Carbon and water exchange over a temperate semi-arid shrubland during three years of contrasting precipitation and soil moisture patterns. Agricultural and Forest Meteorology, 2016, s228-229: 120-129
[38] Wang Z-P (王志鹏), Zhang X-Z (张宪洲), He Y-T (何永涛), et al. Responses of NDVI to precipitation changes on the grassland of Tibetan Plateau from 2000 to 2015. Chinese Journal of Applied Ecology (应用生态学报), 2017, 29(1): 75-83 (in Chinese)