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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第45卷

期数:

2023年第04期

页码:

819-832

栏目:

环境与可持续发展专刊

出版日期:

2023-07-15

文章信息/Info

Title:

Variation Characteristics of NDVI of Different Vegetation Types in Ningxia, China and Their Responses to Climate

文章编号:

1672-6561(2023)04-0819-14

作者:

潘金金¹; 任宗萍^1*; 胥世斌²; 李 鹏¹; 3; 张晓明⁴; 许垚涛¹; 任正龑⁵

(1. 西安理工大学 西北旱区生态水利国家重点实验室,陕西 西安 710048; 2. 西吉县滥泥河流域水土保持试验工作站,宁夏 西吉 756200; 3. 西安理工大学 旱区生态水文与灾害防治国家林业和草原局重点实验室,陕西 西安 710048; 4. 中国水利水电科学研究院,北京 100038; 5. 宁夏回族自治区水土保持监测总站,宁夏 银川 750002)

Author(s):

PAN Jin-jin¹;  REN Zong-ping^1*;  XU Shi-bin²;  LI Peng¹; 3;  ZHANG Xiao-ming⁴;  XU Yao-tao¹;  REN Zheng-yan⁵

(1. State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi, China; 2. Xiji Indiscriminate Mud River Basin Soil and Water Conservation Test Workstation, Xiji 756200, Ningxia, China; 3. Key Laboratory of National Forestry and Grassland Administration on Ecological Hydrology and Disaster Prevention in Arid Regions, Xi'an University of Technology, Xi'an 710048, Shaanxi, China; 4. China Institute of Water Resources and Hydropower Research, Beijing 100038, China; 5. Ningxia Soil and Water Conservation Monitoring Station, Yinchuan 750002, Ningxia, China)

关键词:

归一化植被指数;  植被类型;  时空变化;  温度;  降雨;  方差分解;  相关性;  宁夏

Keywords:

NDVI;  vegetation type;  spatial-temporal change;  temperature;  rainfall;  variance decomposition;  correlation;  Ningxia

分类号:

Q948.112; X171.1; X87

DOI:

-

文献标志码:

A

摘要:

定量分析植被覆盖变化的驱动机制,探索植被与气候因子之间的关系,对区域生态环境评价和水土保持具有重要意义。基于1998～2019年宁夏归一化植被指数(NDVI),采用趋势分析、偏相关分析和冗余分析方差分解等方法,研究不同植被类型NDVI时空变化特征及其驱动因子。结果表明:①宁夏NDVI整体呈波动上升趋势,NDVI年增长速率为0.007 1 年^-1,春季增长速率最低(0.002 3 年^-1),秋季增长速率最高(0.007 5 年^-1); 针叶林、灌丛和荒漠NDVI在夏季增长速率最大,阔叶林、农田、草原和草甸NDVI在秋季增长速率最大。②在年际尺度上,93.4%的区域NDVI呈现改善趋势; 不同季节内,春季植被退化严重,16.6%的植被面积呈现减少趋势,主要发生在北部引黄灌区,其他季节植被退化的区域集中在银川市周边; ③气候是影响植被变化的主要因素,全年和春季NDVI与温度成正相关关系,夏季NDVI与温度成负相关关系,不同季节内NDVI与降水量均成正相关关系。

Abstract:

It is important to quantitatively analyze the driving mechanisms of vegetation cover changes and explore the relationship between vegetation and climate factors for regional ecological environment evaluation and soil and water conservation. Based on the normalized difference vegetation index(NDVI)in Ningxia from 1998 to 2019, the trend analysis, partial correlation analysis and variance decomposition of RDA were used to investigate the spatial-temporal variation characteristics of NDVI of different vegetation types and their driving factors. The results show that ① the annual growth rate of NDVI is 0.007 1 a^-1, with the lowest NDVI growth rate in spring(0.002 3 a^-1)and the highest NDVI growth rate in autumn(0.007 5 a^-1); the NDVI growth rates of coniferous forests, shrub and desert are the highest in summer, and the NDVI growth rates of broad-leaved forests, farmland, grasslands and meadows are the highest in autumn; ② on the annual scale, 93.4% of the regional NDVI show an improving trend; within different seasons, the vegetation degradation is serious in spring, 16.6% of the vegetation area show a decreasing trend, which mainly occur in the yellow irrigation area of northern Ningxia, and the degraded areas in other seasons are concentrated around Yinchuan city; ③ climate is the main factor affecting the vegetation change, NDVI is positively correlated with temperature throughout the year and in spring, while NDVI and temperature are negatively correlated in summer, and NDVI and precipitation are positively correlated in different seasons.

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备注/Memo

备注/Memo:

收稿日期:2022-08-18; 修回日期:2022-11-13投稿网址:http:∥jese.chd.edu.cn/
基金项目:国家自然科学基金项目(42077074,51879281)
作者简介:潘金金(1997-),女,河南信阳人,工学硕士研究生,E-mail:panjinjin16@163.com。
*通讯作者:任宗萍(1982-),女,山东潍坊人,副教授,理学博士,E-mail:renzp@xaut.edu.cn。

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