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Remote Sensing for Natural Resources    2023, Vol. 35 Issue (1) : 222-230     DOI: 10.6046/zrzyyg.2021446
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Spatial-temporal dynamics of ecological carrying capacity of the northeastern margin of the Ulan Buh Desert
QI Zhao1,2(), TAN Bingxiang1,2(), CAO Xiaoming3, YU Hang1,2, SHEN Mingtan1,2
1. Research Institute of Forest Resources Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
2. Key Laboratory of Forestry Remote Sensing and Information System, NFGA, Beijing 100091, China
3. Research Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China
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Abstract  

Ecological carrying capacity is an important indicator used to measure the stability of an ecosystem. The spatial-temporal change analysis of the ecological carrying capacity can help understand the changing trend of a regional ecological environment and serve as a comprehensive reference for the evaluation of ecological management and restoration, research on the overall sustainable development of an environment, and the optimization of land resources. Targeting the arid and semi-arid regions at the northeastern margin of the Ulan Buh Desert, this study constructed a comprehensive index evaluation system of ecological carrying capacity based on the actual ecological conditions of the regions and Landsat remote sensing images as the data source. Then, this study determined the spatial-temporal distribution and evolution pattern of regional ecological carrying capacity and made a driver analysis of the change in the ecological carrying capacity from the angles of rainfall, temperature, and land use changes. The results show that the ecological carrying capacity of the northeastern margin of the Ulan Buh Desert showed a first decreasing and then increasing trend from 1990 to 2020. The irrigated areas north of the Yellow River continued to expand to the desertification areas in the southwest. As a result, the percentage of the area with relatively high ecological carrying capacity increased greatly, while the area with high ecological carrying capacity decreased. The change in the ecological carrying capacity of the irrigated areas was mainly affected by land development and utilization, followed by temperature and rainfall. In contrast, the ecological carrying capacity of the desertification areas south of the Yellow River was mainly at a moderate level, which was shifted to a low level in large areas before 2010 and was restored to a moderate level in 2020. The change in the ecological carrying capacity of the desertification areas was greatly affected by temperature, followed by rainfall and changes in shrub and grass vegetation cover.
Keywords arid and semi-arid region      ecological carrying capacity      comprehensive evaluation index      driver analysis     
ZTFLH:  TP79  
Issue Date: 20 March 2023
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Zhao QI
Bingxiang TAN
Xiaoming CAO
Hang YU
Mingtan SHEN
Cite this article:   
Zhao QI,Bingxiang TAN,Xiaoming CAO, et al. Spatial-temporal dynamics of ecological carrying capacity of the northeastern margin of the Ulan Buh Desert[J]. Remote Sensing for Natural Resources, 2023, 35(1): 222-230.
URL:  
https://www.gtzyyg.com/EN/10.6046/zrzyyg.2021446     OR     https://www.gtzyyg.com/EN/Y2023/V35/I1/222
Fig.1  Image in 2020 and geographical location distribution of the study area
数据类型 单位 数据来源
净初级生产力 g·C/m2 1990年的数据来自于“国家地球系统科学数据中心”提供的全球5 km 8 d总、净初级生产力产品; 2000年、2010年和2020年的数据来自于MOD17A3数据,空间分辨率为500 m,时间分辨率为1 a
潜在蒸散发 0.1 mm 1990年、2000年和2010年的数据来自于“国家地球系统科学数据中心”提供的中国1 km逐月潜在蒸散发数据集; 2020年的数据来自于MOD16A2数据,空间分辨率为500 m,时间分辨率为8 d
温度 0.1 ℃ 1990年、2000年、2010年和2020年的数据均来自于“国家地球系统科学数据中心”提供的中国1 km 逐月平均气温数据集
降雨 0.1 mm 1990年、2000年、2010年和2020年的数据均来自于“国家地球系统科学数据中心”提供的中国1 km 逐月降水量数据集
土地利用数据 — 1990年、2000年、2010年和2020年的土地利用数据均基于Landsat遥感影像数据采用监督分类的方法获取
Tab.1  Source and information for each data type
等级编号 等级名称 生态承载力取值范围
1 低生态承载力 [0,0.2)
2 较低生态承载力 [0.2,0.4)
3 中生态承载力 [0.4,0.6)
4 较高生态承载力 [0.6,0.8)
5 高生态承载力 [0.8,1.0]
Tab.2  Equivalent classification criteria of ecological carrying capacity
Fig.2  Analysis framework of driving factors of long-term ecological carrying capacity
Fig.3  Spatial distribution of ecological carrying capacity in four periods in the study area
Fig.4  Percentage of regions with different levels of ecological carrying capacity in four periods
Fig.5  Change trend of ecological carrying capacity in the study area
变化趋
势类型		 显著
下降		 不显著
下降		 稳定
不变		 不显著
上升		 显著
上升
面积占比 7.09 0.02 81.89 0.19 10.81
Tab.3  Area proportion of the study area with different change trends(%)
Fig.6  Spatial distribution of driving factors of ecological carrying capacity
驱动因
素组合		 无显著
变化区
域		 降雨 温度 其他 降雨
和温
度		 降雨
和其
他		 温度
和其
他		 降雨、
温度和
其他
面积
占比		 81.89 7.61 4.61 2.77 0.31 0.99 1.07 0.75
Tab.4  Area statistics of various driving factors(%)
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