Spatio-temporal evolution and coupling analysis of landscape ecological security in Balikun county from the perspective of Sansheng space

doi:10.14088/j.cnki.issn0439-8114.2021.22.021

Abstract

Abstract: Based on the perspective of “Sansheng space”,we explored the evolution characteristics of landscape ecological security in typical arid areas,and comprehensively used landscape ecology, geostatistics and coupling coordination model. The spatio-temporal change characteristics and coupling coordination characteristics of landscape ecological security in Balikun county from 2013 to 2019 were analyzed systematically. The results showed that,①the forage ecological space and other ecological spaces in Balikun county were dominant, and the areas of forage ecological space and rural living space decreased by 22.94% and 26.49% respectively in 2019, while the areas of other ecological spaces increased. ②The landscape ecological security value of the study area showed an overall upward trend, and the proportion of basic safe areas and safer areas was more than 57.88% in 2019. ③ the Moran's I index of landscape ecological security value of each landscape unit in Balikun county was positive, and there was a positive correlation in space, which was mainly characterized by high-high aggregation and low-low aggregation, including convergence from 2013 to 2016 and divergence from 2016 to 2019. The semi-variation fitting optimal model of landscape ecological security value of each evaluation unit in 2013 and 2016 was exponential model, 2019 was linearl model, and the total variation of system caused by random factors （human activities） showed a downward trend. ④The coupling coordination degree of landscape ecological security value of Sansheng space increased year by year, in which the areas of basic coordination, moderate coordination and high coordination increased by 8 907.15 km², 2 541.46 km² and 4 797.08 km²respectively, while 10 750 km² and 5 490.38 km² decreased in severe and moderately maladjusted areas, respectively.

Key words: Sansheng space, landscape ecological security, coupling coordination analysis, Balikun county

CLC Number:

X171

ZHAO Juan, ZHANG Yun-xia, ZHANG Yong-fu. Spatio-temporal evolution and coupling analysis of landscape ecological security in Balikun county from the perspective of Sansheng space[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(22): 92-100.

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