青藏高原草地植被覆盖变化及其与气候因子的关系

doi:10.17521/cjpe.2006.0001

摘要/Abstract

摘要：

为揭示气候变化对青藏高原草地生态系统的影响及其生态适应机制,利用1982~1999年间的NOAA/AVHRR NDVI数据和对应的气候资料,研究了近20年来青藏高原草地植被覆盖变化及其与气候因子的关系。结果表明,18年来研究区生长季NDVI显著增加(p=0.015),其增加率和增加量分别为0.41% a^-1和0.001 0 a^-1。生长季提前和生长季生长加速是青藏高原草地植被生长季NDVI增加的主要原因。春季为NDVI增加率和增加量最大的季节,其增加率和增加量分别为0.92% a^-1和0.001 4 a^-1;夏季NDVI的增加对生长季NDVI增加的贡献相对较小,其增加率和增加量分别为0.37% a^-1和0.001 0 a^-1。3种草地(高寒草甸、高寒草原、温性草原)春季NDVI均显著增加(p<0.01;p=0.001; p=0.002); 高寒草甸夏季NDVI显著增加(p=0.027),而高寒草原和温性草原夏季NDVI呈增加趋势,但都不显著(p=0.106; p=0.087);3种草地秋季NDVI则没有明显的变化趋势(p=0.585; p=0.461; p=0.143)。3种草地春季NDVI的增加是由春季温度上升所致。高寒草地(高寒草甸和高寒草原)夏季NDVI的增加是夏季温度和春季降水共同作用的结果。温性草原夏季NDVI变化与气候因子并没有表现出显著的相关关系。高寒草地植被生长对气候变化的响应存在滞后效应。

关键词: 青藏高原, 高寒草甸, 高寒草原, 温性草原, NDVI, 气候因子

Abstract:

To advance our understanding of the effects of climate change on grassland ecosystems, we used a time series (1982-1999) data set of the Normalized Difference Vegetation Index (NDVI) together with historical climate data to analyze interannual variations in grassland vegetation cover and explore the relationships between NDVI and climatic factors on the grasslands of the Tibetan Plateau. The NDVI increased significantly by a ratio of 0.41% a^-1 and a magnitude of 0.001 0 a^-1 during the growing season (p=0.015). An increase in NDVI during the growing season resulted from both the advanced growing season and accelerated vegetation activity. The largest NDVI increase was in the spring with a ratio of 0.92% a^-1 and a magnitude of 0.001 4 a^-1. The NDVI increase in the summer was a secondary contributor to the NDVI increase during the growing season with a ratio of 0.37% a^-1 and a magnitude of 0.001 0 a^-1. In the spring, the NDVI increased significantly in the alpine grasslands (alpine meadow and alpine steppe) and temperate steppe (p<0.01;p=0.001; p=0.002). During the summer, a significant NDVI increase was found in alpine meadows (p=0.027). However, the NDVI increase in alpine and temperate steppe was not significant (p=0.106; p=0.087). In the autumn, no significant increase was found in the three grasslands (p=0.585; p=0.461; p=0.143). In the spring, the NDVI increase in three grasslands was corresponded to an increase in temperature. In the summer, the NDVI was related to temperature and sensitive to precipitation in the spring in the alpine grasslands (alpine meadow and alpine steppe). However, no significant statistical relationship was found between NDVI and climatic factors in temperate steppe. Significant lagged correlations between precipitation and NDVI were found for alpine grasslands (alpine meadow, alpine steppe).

Key words: Tibetan Plateau, Alpine meadow, Alpine steppe, Temperate steppe, NDVI, Climatic factors

杨元合, 朴世龙. 青藏高原草地植被覆盖变化及其与气候因子的关系. 植物生态学报, 2006, 30(1): 1-8. DOI: 10.17521/cjpe.2006.0001

YANG Yuan-He, PIAO Shi-Long. VARIATIONS IN GRASSLAND VEGETATION COVER IN RELATION TO CLIMATIC FACTORS ON THE TIBETAN PLATEAU. Chinese Journal of Plant Ecology, 2006, 30(1): 1-8. DOI: 10.17521/cjpe.2006.0001

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2006.0001

https://www.plant-ecology.com/CN/Y2006/V30/I1/1

图/表 5

图1 青海-西藏高原草地分布图

Fig.1 Distribution of grasslands on the Qinghai-Xizang Plateau

图2 1982~1999年青藏高原草地生长季平均NDVI、平均温度和降水量的年际变化

Fig.2 Interannual variations in growing season's mean NDVI, mean temperature, and precipitation of grasslands on the Tibetan Plateau over the period of 1982-1999

图3 1982~1999年高寒草甸(a)、温性草原(b)和高寒草原(c)生长季平均NDVI的年际变化

Fig.3 Interannual variations in growing season's mean NDVI over the period of 1982-1999 for alpine meadow (a), temperate steppe (b), and alpine steppe (c)

图4 1982~1999年整个研究区(a)、高寒草甸(b)、高寒草原(c)和温性草原(d)不同季节平均NDVI的变化

Fig.4 Interannual variations in seasonal mean NDVI over the period of 1982-1999 for study area (a), alpine meadow (b), alpine steppe (c), and temperate steppe (d)

表1 1982~1999年间不同季节NDVI的变化量和变化率

Table 1 NDVI changing magnitude and changing ratio in different season during 1982-1999

	NDVI变化量 NDVI changing magnitude (a^-1)						NDVI变化率 NDVI changing ratio (a^-1)
	生长季 Growing season	春季 Spring	夏季 Summer		秋季 Autumn		生长季 (%) Growing season	春季 (%) Spring	夏季 (%) Summer	秋季 (%) Autumn
研究区域Study area	0.001 0	0.001 4		0.001 0		0.000 4	0.41	0.92	0.37	0.15
高寒草甸Alpine meadow	0.001 3	0.001 9		0.001 5		0.000 4	0.39	1.10	0.41	0.11
高寒草原Alpine steppe	0.000 7	0.000 9		0.000 7		0.000 4	0.41	0.72	0.39	0.22
温性草原Temperate steppe	0.001 0	0.001 5		0.000 9		0.000 8	0.42	0.92	0.35	0.31

参考文献 36

[1]	Academician of Chinese Academy of Sciences (中国科学院中国植被图编辑委员会) (2001). Vegetation Atlas of China (中国植被图集). Science Press, Beijing. (in Chinese)
[2]	Braswell BH, Schimel DS, Linder E, Moore B (1997). The response of global terrestrial ecosystems to interannual temperature variability. Science, 238,870-872.
[3]	Cao MK, Zhang QF, Shugart HH (2001). Dynamic responses of African ecosystem carbon cycling to climate change. Climate Research, 17,183-193.
[4]	DeFries R, Field C, Fung I, Justice CO, Los S, Matson PA, Matthews E, Mooney HA, Potter CS, Prentice K, Sellers PJ, Townshend JRG, Tucker CJ, Ustin SL, Vitousek PM (1995). Mapping the land-surface for global atmosphere-biosphere models, toward continuous distributions of vegetations functional properties. Journal of Geophysical Research, 100,20867-20882.
[5]	Dijkstra P, Hymus G, Colavito D, Vieglais DA, Cundari CM, Johnson DP, Hungate BA, Hinkle CR, Drake BG (2002). Elevated atmospheric CO ₂ stimulates aboveground biomass in a fire-regenerated scrub-oak ecosystem. Global Change Biology, 8,90-103.
[6]	Hicke JA, Asner GP, Randerson JT, Tucker C, Los S, Birdsey R, Jenkins JC, Field C (2002). Trends in North American net primary productivity derived from satellite observations,1982-1998. Global Biogeochemical Cycles, 16,doi: 10.1029/2001GB001550.
[7]	Holben BN (1986). Characteristics of maximum-value composite images for temporal AVHRR data. International Journal of Remote Sensing, 7,1435-1445.
[8]	IPCC (2001). Climate Change 2001, Impact, Adaptation, and Vulnerability. Cambridge University Press, Cambridge.
[9]	Jenkins JP, Braswell BH, Frolking SE, Aber JD (2002). Detecting and predicting spatial and interannual patterns of temperate forest springtime phenology in the eastern US. Geophysical Research Letters, 29,doi: 10.1029/2001GL014008.
[10]	Jobbagy EG, Sala OE, Paruelo JM (2002). Patterns and controls of primary production in the Patagonian steppe: a remote sensing approach. Ecology, 83,307-319.
[11]	Keeling CD, Chin JFS, Whorf TP (1996). Increased activity of northern vegetation inferred from atmospheric CO ₂ measurements. Nature, 382,146-149.
[12]	Li WH (李文华), Zhou XM (周兴民) (1998). Ecosystems of Qinghai-Xizang(Tibetan) Plateau and Approach for Their Sustainable Management (青藏高原生态系统及优化利用模式). Guangdong Science & Technology Press, Guangzhou. (in Chinese)
[13]	Li XB (李晓兵), Shi PJ (史培军) (2000). Sensitivity analysis of variation in NDVI, temperature and precipitation in typical vegetation types across China. Acta Phytoecologica Sinica (植物生态学报), 24,379-382. (in Chinese with English abstract)
[14]	Li Z, Kafatos M (2000). Interannual variability of vegetation in the United States and its relation to EI Nino/Southern Oscillation. Remote Sensing of Environment, 71,239-247.
[15]	Magill AH, Aber JD, Currie WS, Nadelhoffer KJ, Martin ME, McDowell WH, Melillo JM, Steudler P (2004). Ecosystem response to 15 years of chronic nitrogen additions at the Harvard Forest LTER, Massachusetts, USA. Forest Ecology and Management, 196,7-28.
[16]	Myneni RB, Dong J, Tucker CJ, Kaufmann RK, Kauppi PE, Liski J, Zhou L, Alexeyev V, Hughes MK (2001). A large carbon sink in the woody biomass of Northern forests. Proceedings of the National Academy of Sciences of the United States of America, 98,14784-14789. URL PMID
[17]	Myneni RB, Keeling CD, Tucker CJ, Asrar G, Nemani RR (1997). Increased plant growth in the northern high latitudes from 1981 to 1991. Nature, 386,698-702.
[18]	Nan ZT (南卓铜), Gao ZS (高泽深), Li SX (李述训), Wu TH (吴通华) (2003). Permafrost changes in the northern limit of permafrost on the Qinghai-Tibet Plateau in the last 30 years. Acta Geographica Sinica (地理学报), 58,817-823. (in Chinese with English abstract)
[19]	Ni J (2000). A simulation of biomes on the Tibetan Plateau and their responses to global climate change. Mountain Research and Development, 20,80-89.
[20]	Piao SL, Fang JY, Zhou LM, Guo QH, Henderson M, Ji W, Li Y, Tao S (2003). Interannual variations of monthly and seasonal normalized difference vegetation index (NDVI) in China from 1982 to 1999. Journal of Geophysical Research, 108,doi: 10.1029/2002JD002848. URL PMID
[21]	Piao SL, Fang JY, Ji W, Guo QH, Ke JH, Tao S (2004). Variation in a satellite-based vegetation index in relation to climate in China. Journal of Vegetation Science, 15,219-226.
[22]	Potter CS, Brooks V (1998). Global analysis of empirical relations between annual climate and seasonality of NDVI. International Journal of Remote Sensing, 19,2921-2948.
[23]	Schultz PA, Halpert MS (1995). Global analysis of the relationships among a vegetation index, precipitation and land-surface temperature. International Journal of Remote Sensing, 16,2755-2777.
[24]	Sun HL (孙鸿烈), Zheng D (郑度) (1998). Formation, Evolution and Development of Tibetan Plateau (青藏高原形成演化与发展). Guangdong Science & Technology Press, Guangzhou. (in Chinese)
[25]	Tang MC (汤懋苍), Li CQ (李存强) (1992). An analysis on the Qinghai-Xizang Plateau as "a disturbing source region" for climatic changes. In: China Society of the Qinghai-Xizang Plateau Research(中国青藏高原研究会) ed. Proceedings of the First Symposium on the Qinghai-Xizang Plateau (中国青藏高原研究会第一届学术讨论会论文选). Science Press, Beijing. (in Chinese)
[26]	Tucker CJ, Slayback DA, Pinzon JE, Los SO, Myneni RB, Taylor MG (2001). Higher northern latitude NDVI and growing season trends from 1982 to 1999. International Journal of Biometeorology, 45,184-190. URL PMID
[27]	Wang J, Price KP, Rich PM (2001). Spatial patterns of NDVI in response to precipitation and temperature in the central Great Plains. International Journal of Remote Sensing, 22,3827-3844.
[28]	Wang J, Rich PM, Price KP (2003). Temporal responses of NDVI to precipitation and temperature in the central Great Plains, USA. International Journal of Remote Sensing, 24,2345-2364.
[29]	Weltzin JF, Loik ME, Schwinning S, Williams DG, Fay PA, Haddad BM, Harte J, Huxman TE, Knapp AK, Lin GH, Pockman WT, Shaw MR, Small EE, Smith MD, Smith SD, Tissue DT, Zak JC (2003). Assessing the response of terrestrial ecosystems to potential changes in precipitation. BioScience, 53,941-952.
[30]	Yao TD (姚檀栋), Liu XD (刘晓东), Wang NL (王宁练) (2000). The range of climatic change on the Tibetan Plateau. Chinese Science Bulletin (科学通报), 45,98-106. (in Chinese)
[31]	Zavaleta ES, Shaw MR, Chiariello NR, Mooney HA, Field CB (2003a). Additive effects of simulated climate changes, elevated CO ₂, and nitrogen deposition on grassland diversity. Proceedings of the National Academy of Sciences of the United States of America, 100,7650-7654. URL PMID
[32]	Zavaleta ES, Shaw MR, Chiariello NR, Thomas BD, Cleland EE, Field CB, Mooney HA (2003b). Grassland responses to three years of elevated temperature, CO ₂, precipitation, and N deposition. Ecological Monographs, 73,585-604.
[33]	Zhang XS, Yang DA, Zhou GS, Liu CY, Zhang J (1996). Model expectation of impacts of global climate change on biomes of the Tibetan Plateau. In: Omasa K, Kai K, Taoda H, Uchijima Z, Yoshino M eds. Climate Change and Plants in East Asia. Springer-Verlag, Tokyo.
[34]	Zhou LM, Tucker CJ, Kaufmann RK, Slayback D, Shabanov NV, Myneni RB (2001). Variations in northern vegetation activity inferred from satellite data of vegetation index during 1981 to 1999. Journal of Geophysical Research, 106,20069-20083.
[35]	Zhou LM, Kaufmann RK, Tian Y, Myneni RB, Tucker CJ (2003). Relation between interannual variations in satellite measures of northern forest greenness and climate between 1982 and 1999. Journal of Geophysical Research, 108,doi: 10.1029/2002JD002510. DOI URL PMID
[36]	Zhou XM (周兴民) (2001). Kobresia Meadow of China (中国嵩草草甸). Science Press, Beijing. (in Chinese)