Influences of Climate Change and Human Activities on NDVI Changes in China

The spatiotemporal evolution of vegetation and its influencing factors can be used to explore the relationships among vegetation, climate change, and human activities, which are of great importance for guiding scientific management of regional ecological environments. In recent years, remote sensing...

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Autores principales:	Yu Liu, Jiyang Tian, Ronghua Liu, Liuqian Ding
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	normalized difference vegetation index standardized precipitation–evapotranspiration index human activities China Science Q
Acceso en línea:	https://doaj.org/article/c3940f1eb1b74957b6658e4641be986f
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spelling	oai:doaj.org-article:c3940f1eb1b74957b6658e4641be986f2021-11-11T18:53:55ZInfluences of Climate Change and Human Activities on NDVI Changes in China10.3390/rs132143262072-4292https://doaj.org/article/c3940f1eb1b74957b6658e4641be986f2021-10-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/21/4326https://doaj.org/toc/2072-4292The spatiotemporal evolution of vegetation and its influencing factors can be used to explore the relationships among vegetation, climate change, and human activities, which are of great importance for guiding scientific management of regional ecological environments. In recent years, remote sensing technology has been widely used in dynamic monitoring of vegetation. In this study, the normalized difference vegetation index (NDVI) and standardized precipitation–evapotranspiration index (SPEI) from 1998 to 2017 were used to study the spatiotemporal variation of NDVI in China. The influences of climate change and human activities on NDVI variation were investigated based on the Mann–Kendall test, correlation analysis, and other methods. The results show that the growth rate of NDVI in China was 0.003 year<sup>−1</sup>. Regions with improved and degraded vegetation accounted for 71.02% and 22.97% of the national territorial area, respectively. The SPEI decreased in 60.08% of the area and exhibited an insignificant drought trend overall. Human activities affected the vegetation cover in the directions of both destruction and restoration. As the elevation and slope increased, the correlation between NDVI and SPEI gradually increased, whereas the impact of human activities on vegetation decreased. Further studies should focus on vegetation changes in the Continental Basin, Southwest Rivers, and Liaohe River Basin.Yu LiuJiyang TianRonghua LiuLiuqian DingMDPI AGarticlenormalized difference vegetation indexstandardized precipitation–evapotranspiration indexhuman activitiesChinaScienceQENRemote Sensing, Vol 13, Iss 4326, p 4326 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	normalized difference vegetation index standardized precipitation–evapotranspiration index human activities China Science Q
spellingShingle	normalized difference vegetation index standardized precipitation–evapotranspiration index human activities China Science Q Yu Liu Jiyang Tian Ronghua Liu Liuqian Ding Influences of Climate Change and Human Activities on NDVI Changes in China
description	The spatiotemporal evolution of vegetation and its influencing factors can be used to explore the relationships among vegetation, climate change, and human activities, which are of great importance for guiding scientific management of regional ecological environments. In recent years, remote sensing technology has been widely used in dynamic monitoring of vegetation. In this study, the normalized difference vegetation index (NDVI) and standardized precipitation–evapotranspiration index (SPEI) from 1998 to 2017 were used to study the spatiotemporal variation of NDVI in China. The influences of climate change and human activities on NDVI variation were investigated based on the Mann–Kendall test, correlation analysis, and other methods. The results show that the growth rate of NDVI in China was 0.003 year<sup>−1</sup>. Regions with improved and degraded vegetation accounted for 71.02% and 22.97% of the national territorial area, respectively. The SPEI decreased in 60.08% of the area and exhibited an insignificant drought trend overall. Human activities affected the vegetation cover in the directions of both destruction and restoration. As the elevation and slope increased, the correlation between NDVI and SPEI gradually increased, whereas the impact of human activities on vegetation decreased. Further studies should focus on vegetation changes in the Continental Basin, Southwest Rivers, and Liaohe River Basin.
format	article
author	Yu Liu Jiyang Tian Ronghua Liu Liuqian Ding
author_facet	Yu Liu Jiyang Tian Ronghua Liu Liuqian Ding
author_sort	Yu Liu
title	Influences of Climate Change and Human Activities on NDVI Changes in China
title_short	Influences of Climate Change and Human Activities on NDVI Changes in China
title_full	Influences of Climate Change and Human Activities on NDVI Changes in China
title_fullStr	Influences of Climate Change and Human Activities on NDVI Changes in China
title_full_unstemmed	Influences of Climate Change and Human Activities on NDVI Changes in China
title_sort	influences of climate change and human activities on ndvi changes in china
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c3940f1eb1b74957b6658e4641be986f
work_keys_str_mv	AT yuliu influencesofclimatechangeandhumanactivitiesonndvichangesinchina AT jiyangtian influencesofclimatechangeandhumanactivitiesonndvichangesinchina AT ronghualiu influencesofclimatechangeandhumanactivitiesonndvichangesinchina AT liuqianding influencesofclimatechangeandhumanactivitiesonndvichangesinchina
_version_	1718431726975320064

Influences of Climate Change and Human Activities on NDVI Changes in China

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