Vegetation changes in the agricultural-pastoral areas of northern China from 2001 to 2013
Climate change and human activity have resulted in increasing change of vegetation growth globally. Numerous studies have been conducted on extreme climate events and analyses of ecological environment evolution. However, such studies have placed little emphasis on vegetation change and spatial vari...
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doaj-6396cce9e6484551a09ac9bb90c4eb1d2021-06-07T06:51:22ZengElsevierJournal of Integrative Agriculture2095-31192016-05-0115511451156Vegetation changes in the agricultural-pastoral areas of northern China from 2001 to 2013Wei SU0De-yong YU1Zhong-ping SUN2Jun-ge ZHAN3Xiao-xuan LIU4Qian LUO5State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, P.R.China; College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, P.R.ChinaState Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, P.R.ChinaState Key Laboratory of Remote Sensing Science/School of Geography, Beijing Normal University, Beijing 100875, P.R.China; Satellite Environment Center, Ministry of Environmental Protection, Beijing 100094, P.R.China; Correspondence SUN Zhong-ping, Tel: +86-10-58311572, Fax: +86-10-58311501College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, P.R.ChinaCollege of Information and Electrical Engineering, China Agricultural University, Beijing 100083, P.R.ChinaCollege of Information and Electrical Engineering, China Agricultural University, Beijing 100083, P.R.ChinaClimate change and human activity have resulted in increasing change of vegetation growth globally. Numerous studies have been conducted on extreme climate events and analyses of ecological environment evolution. However, such studies have placed little emphasis on vegetation change and spatial variation in this type of ecotone. Accordingly, this study analyzed the changes in vegetation type and growth using the 16-d composite MOD13A1 product with 1-km resolution and MOD12Q1 product with 1-km resolution. We used the mean, maximum, standard deviation normalized-difference vegetation index (NDVI) values, and the rate of change (ROC) of NDVI value to explain vegetation changes within the studied ecotone. Our results showed that significant vegetation type and growth changes have occurred in the study area. From 2001 to 2013, for example, with the exception of 2001, 2004 and 2009, a certain extent of grassland area was converted to cropland. Drought severity index (DSI) results indicate that there exists drought in 2001, 2004 and 2009. Such temporal changes in cropland and grassland area confirmed the ecological vulnerability of the ecotone. At the same time, vegetation varied spatially from west to east and from south to north. The mean, maximum and standard deviation NDVI values were all sorted in descending order based on differences in latitude and longitude, as follows: NDVI2013>NDVI2009>NDVI2004>NDVI2001http://www.sciencedirect.com/science/article/pii/S2095311915611595vegetation growthagricultural-pastoral areaMODISland cover changetemporal changespatial variation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Wei SU De-yong YU Zhong-ping SUN Jun-ge ZHAN Xiao-xuan LIU Qian LUO |
spellingShingle |
Wei SU De-yong YU Zhong-ping SUN Jun-ge ZHAN Xiao-xuan LIU Qian LUO Vegetation changes in the agricultural-pastoral areas of northern China from 2001 to 2013 Journal of Integrative Agriculture vegetation growth agricultural-pastoral area MODIS land cover change temporal change spatial variation |
author_facet |
Wei SU De-yong YU Zhong-ping SUN Jun-ge ZHAN Xiao-xuan LIU Qian LUO |
author_sort |
Wei SU |
title |
Vegetation changes in the agricultural-pastoral areas of northern China from 2001 to 2013 |
title_short |
Vegetation changes in the agricultural-pastoral areas of northern China from 2001 to 2013 |
title_full |
Vegetation changes in the agricultural-pastoral areas of northern China from 2001 to 2013 |
title_fullStr |
Vegetation changes in the agricultural-pastoral areas of northern China from 2001 to 2013 |
title_full_unstemmed |
Vegetation changes in the agricultural-pastoral areas of northern China from 2001 to 2013 |
title_sort |
vegetation changes in the agricultural-pastoral areas of northern china from 2001 to 2013 |
publisher |
Elsevier |
series |
Journal of Integrative Agriculture |
issn |
2095-3119 |
publishDate |
2016-05-01 |
description |
Climate change and human activity have resulted in increasing change of vegetation growth globally. Numerous studies have been conducted on extreme climate events and analyses of ecological environment evolution. However, such studies have placed little emphasis on vegetation change and spatial variation in this type of ecotone. Accordingly, this study analyzed the changes in vegetation type and growth using the 16-d composite MOD13A1 product with 1-km resolution and MOD12Q1 product with 1-km resolution. We used the mean, maximum, standard deviation normalized-difference vegetation index (NDVI) values, and the rate of change (ROC) of NDVI value to explain vegetation changes within the studied ecotone. Our results showed that significant vegetation type and growth changes have occurred in the study area. From 2001 to 2013, for example, with the exception of 2001, 2004 and 2009, a certain extent of grassland area was converted to cropland. Drought severity index (DSI) results indicate that there exists drought in 2001, 2004 and 2009. Such temporal changes in cropland and grassland area confirmed the ecological vulnerability of the ecotone. At the same time, vegetation varied spatially from west to east and from south to north. The mean, maximum and standard deviation NDVI values were all sorted in descending order based on differences in latitude and longitude, as follows: NDVI2013>NDVI2009>NDVI2004>NDVI2001 |
topic |
vegetation growth agricultural-pastoral area MODIS land cover change temporal change spatial variation |
url |
http://www.sciencedirect.com/science/article/pii/S2095311915611595 |
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