Analysis on the Changing Trend of Vegetation EVI and Its Influencing Factors in Qinghai Province from 2000 to 2015

doi:10.13466/j.cnki.lyzygl.2017.06.014

Abstract

Abstract:

Based on the MODIS EVI data of Qinghai Province from 2000 to 2015,this paper analyzed the spatial-temporal change pattern of vegetation EVI in Qinghai Province,and revealed the correlation between climatic factors and vegetation EVI and discussed the effect of human activities on vegetation growth and development.The results showed that the EVI of Qinghai Province increased from 2000 to 2015 (0.0180/10a),which could be divided into rapid growth period (2000-2004),fluctuation period (2005-2012) and slight decline period (2013-2015);EVI showed a significant increase in the area ratio of 51.58%,showing a significant reduction in the region accounted for 20.64%,27.78% of the regional EVI did not significantly change or basically unchanged,of which the increase rate of vegetation EVI and the area of vegetation improvement in Haixi area were the largest.There was a positive correlation between temperature and precipitation and EVI,and the proportion of positive correlation was 60.67% and 69.50% respectively.The effect of precipitation on vegetation growth and development was slightly higher than that of temperature.The reduction of carrying capacity and the increase of ecological engineering area have promoted the growth and development of vegetation to a certain extent,but it is limited and preliminary compared with climate change.

Key words: Qinghai Province, EVI, vegetation changes

CLC Number:

S718.5
Q948

MA Hao. Analysis on the Changing Trend of Vegetation EVI and Its Influencing Factors in Qinghai Province from 2000 to 2015[J]. FOREST RESOURCES WANAGEMENT, 2017, 0(6): 77-83.

Figures/Tables 8

Tab.1

Fig.1

Fig.2

Tab.2

Fig.3

Fig.4

Fig.5

Fig.6

References 25

[1]	封建民, 王涛, 谢昌卫, 等. 黄河源区生态环境退化研究[J]. 地理科学进展, 2004,23(6):56-62. doi: 10.11820/dlkxjz.2004.06.007
[2]	孙鸿烈, 郑度, 姚檀栋, 等. 青藏高原国家生态安全屏障保护与建设[J]. 地理学报, 2012,67(1):3-12. doi: 10.11821/xb201201001
[3]	秦大河. 三江源区生态保护与可持续发展[M]. 北京: 科学出版社, 2014: 1-5.
[4]	Wang S L, Jin H J, Li S X, et al. Permafrost degradation on the Qinghai-Tibet Plateau and its environmental impacts.[J]. Permafrost & Periglacial Processes, 2000,11(1):43-53.
[5]	Wu T, Zhao L, Li R, Wang Q, et al. Recent ground surface warming and its effects on permafrost on the central Qinghai-Tibet Plateau[J]. International Journal of Climatology, 2013,33:920-930.
[6]	Yang M, Nelson F E, Shiklomanov N I, et al. Permafrost degradation and its environmental effects on the Tibetan Plateau:A review of recent research[J]. Earth-Science Reviews, 2010,103(1):31-44.
[7]	姜永见, 李世杰, 沈德福, 等. 青藏高原近40年来气候变化特征及湖泊环境响应[J]. 地理科学, 2012,32(12):1503-1512.
[8]	李红军, 郑力, 雷玉平, 等. 基于EOS/MODIS数据的NDVI与EVI比较研究[J]. 地理科学进展, 2007,26(1):26-32.
[9]	霍艾迪, 王国梁, 李倩, 等. 基于MODIS影像数据的陕北黄土高原植被区划研究[J]. 西北林学院学报, 2009,24(4):32-36.
[10]	王正兴, 刘闯, HUETE Alfredo. 植被指数研究进展:从AVHRR-NDVI到MODIS-EVI[J]. 生态学报, 2003,23(5):979-987.
[11]	王虎威, 张福平, 燕玉超, 等. 山西省不同生态分区增强型植被指数(EVI)对气候因子的响应[J]. 干旱地区农业研究, 2016,34(6):266-273.
[12]	陈燕丽, 罗永明, 莫伟华, 等. MODIS NDVI与MODIS EVI对气候因子响应差异[J]. 自然资源学报, 2014(10):1802-1812.
[13]	杨嘉, 郭铌, 贾建华. 西北地区MODIS/NDVI与MODIS/EVI对比分析[J]. 干旱气象, 2007,25(1):38-43.
[14]	李文梅, 覃志豪, 李文娟, 等. MODIS NDVI与MODIS EVI的比较分析[J]. 遥感信息, 2010(6):73-78.
[15]	左丽君, 张增祥, 董婷婷, 等. MODIS/NDVI和MODIS/EVI在耕地信息提取中的应用及对比分析[J]. 农业工程学报, 2008,24(3):167-172.
[16]	叶琦, 赵萍, 孙静. 基于MODIS/NDVI与EVI的皖江流域植被覆盖比较分析[J]. 长江流域资源与环境, 2012,21(3):361-368.
[17]	刘建军, 赵鹏祥, 强建华. 青海省湿地资源现状调查及评价研究[J]. 西北林学院学报, 2006,21(6):77-80.
[18]	王莉雯, 卫亚星, 牛铮. 基于遥感的青海省植被覆盖时空变化定量分析[J]. 环境科学, 2008,29(6):1754-1760.
[19]	孙庆龄, 李宝林, 许丽丽, 等. 2000—2013年三江源植被NDVI变化趋势及影响因素分析[J]. 地球信息科学学报, 2016(12):1707-1716.
[20]	张远东, 张笑鹤, 刘世荣. 西南地区不同植被类型归一化植被指数与气候因子的相关分析[J]. 应用生态学报, 2011,22(2):323-330.
[21]	周陆生. 青海省长期气候变化趋势及其对生态环境可能影响的初步展望[J]. 青海气象, 2001(2):2-13.
[22]	何月, 樊高峰, 张小伟, 等. 浙江省植被NDVI动态及其对气候的响应[J]. 生态学报, 2012,32(14):4352-4362.
[23]	刘宪锋, 任志远, 林志慧, 等. 2000—2011年三江源区植被覆盖时空变化特征[J]. 地理学报, 2013,68(7):897-908.
[24]	青海省统计局. 青海统计年鉴(2000,2005,2010,2015)[M]. 北京: 中国统计出版社; 2000; 2005; 2010; 2015.
[25]	张良侠, 樊江文, 邵全琴, 等. 生态工程前后三江源草地产草量与载畜压力的变化分析[J]. 草业学报, 2014,23(5):116-123.

变化类型	变化率/%	F检验显著性水平
明显增加	R≥15.0	p<0.1
略微增加	5.0<R<15.0	p<0.1
明显减少	R≤-15.0	p<0.1
略微减少	-15.0<R<5.0	p<0.1
变化稳定	-5.0≤R≤5.0	p<0.1
无显著变化		p>0.1

区县	EVI均值	变化率 (/10a)	变化类型比例/%
区县	EVI均值	变化率 (/10a)	明显增加	略微增加	明显减少	略微减少	变化稳定	无显著变化
西宁市	0.71	0.0031	37.46	10.02	32.49	9.70	10.33	—
海东市	0.73	0.0158	52.93	8.73	23.52	6.81	8.01	—
海北州	0.71	-0.0080	24.52	10.34	41.44	11.97	11.73	—
黄南州	0.67	0.0031	37.93	10.98	29.94	10.24	10.91	—
海南州	0.70	0.0109	46.58	10.60	24.37	8.60	9.85	—
果洛州	0.71	0.0072	40.14	11.84	25.66	10.59	11.77	—
玉树州	0.70	0.0062	38.33	11.75	26.94	11.01	11.98	—
海西州	0.56	0.0343	66.68	8.26	12.18	5.74	7.15	—
青海省	0.64	0.0180	51.58	9.93	20.64	8.35	9.49	—