Spatial and temporal evolution of ecological risk in FAST Radio Quiet Zone based on landscape pattern

XIN Liang; SU Wei-ci

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China Environmental Science ›› 2023, Vol. 43 ›› Issue (10) : 5475-5487.

Environmental Ecology

Spatial and temporal evolution of ecological risk in FAST Radio Quiet Zone based on landscape pattern

XIN Liang¹, SU Wei-ci^1,2

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Abstract

Based on the land use data in 2000, 2010 and 2020, the evaluation model was constructed by using the landscape disturbance index and landscape vulnerability index to analyze the change characteristics of landscape pattern and ecological risk in the region in the past two decades, so as to reveal the impacts of the completion of the FAST project on the ecological environment of different circles in this region. The purpose was to provide some reference for the future ecological protection and risk prevention in this region. The results showed that:woodland, grassland and cultivated land were the dominant landscape types in FAST Radio Quiet Zone. From 2000 to 2010, the landscape changes were mainly from grassland and cultivated land to woodland, and human activities were relatively weak. From 2010 to 2020, the construction land increased rapidly, the comprehensive dynamic attitudes of the three circles increased, and the landscape pattern changed gradually active but still at a low controllable level. The study area was mainly composed of low ecological risk area, lower ecological risk area and medium ecological risk area. The ecological risk was low in both the core area and the middle area but had an increasing trend under the influence of the FAST project, while the risk change in the remote area showed a spindle shape of "decreasing at the poles and increasing in the middle". The ecological risk in the study area showed a spatial positive correlation and the correlation became more and more significant. The distribution characteristics were mainly "high-high" aggregation and "low-low" aggregation.

Key words

circle difference / ecological risk assessment / FAST Radio Quiet Zone / landscape pattern change / spatial autocorrelation

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XIN Liang, SU Wei-ci. Spatial and temporal evolution of ecological risk in FAST Radio Quiet Zone based on landscape pattern[J]. China Environmental Science. 2023, 43(10): 5475-5487

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