Journal of Geographical Sciences, Volume. 30, Issue 2, 281(2020)
Traditional agroecosystem transition in mountainous area of Three Gorges Reservoir Area
Fig. 1. The evolution theoretical model of the mountain agroecosystem
Fig. 2. Agroecosystem transition in the Three Gorges Reservoir Area (photographs from August 2017)
Fig. 3. Location of the study area in the mountainous hinterland of the Three Gorges Reservoir Area
Fig. 8. The landscape characterization of the agroecosystem transition
Fig. 9. The changing relationships between system elements during the agroecosystem transition
Fig. 10. The changing modes of the agroecosystem transition from 2012 to 2017 in the Three Gorges Reservoir Area
Table 1.
Reference standards for different settlement attributes
View tableView in ArticleTable 1.
Reference standards for different settlement attributes
Settlement type Identification standard Sources Interpretation reference Decline Signs of cultivation near settlements are disappearing and abandoned land trends are clear; the landscape tends to be monotonous; the colors of residential locations are dim; and surrounding roads are gradually replaced by “forest-shrub-grass”. CNES AstriumQuick Bird(0.51 m) 
Stagnation The distribution of the surrounding farmland is scattered and there are no signs of consolidation; the overall landscape pattern is balanced; the colors of residential locations are generally dark; and infrastructure construction is declining. 
Development The surrounding farmland shows order and there are signs of consolidation; a weak fruit forest planting trend appears; the ecological landscape tends to be diverse; the colors of the residential locations are white; and individual homes are clear. 
Vigor Clearly fruit forest planting trend near the settlements; the surrounding infrastructure is complete; the landscape is diverse; the colors of residential locations are bright; and the stereo perception of the settlements is strong. 
Table 2.
Classification of land use degree
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Classification of land use degree
Land grade Unused Natural Agricultural Construction Land use type Unused land Forest land, grass land, water and abandoned farmland Sloping farmland, orchard and economic fruit forest Urban land, rural residential land, industrial and mining land and transport land Graded index 1 2 3 4
Table 3.
Typical landscape characteristics of the agroecosystem
View tableView in ArticleTable 3.
Typical landscape characteristics of the agroecosystem
Economic fruit forest Abandoned farmland Sloping farmland Forest-shrub-grass land HLL 
HLH 
LHL 
LLH 
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Xinyuan LIANG, Yangbing LI, Jing’an SHAO, Caihong RAN. Traditional agroecosystem transition in mountainous area of Three Gorges Reservoir Area[J]. Journal of Geographical Sciences, 2020, 30(2): 281
Received: Mar. 4, 2019
Accepted: Apr. 28, 2019
Published Online: Sep. 29, 2020
The Author Email: Yangbing LI (li-yapin@sohu.com)
