| The city cluster on the northern slopes of the Tianshan Mountains is the most developed core area of modern agriculture,industry,education,science and technology and transportation in Xinjiang,with a high degree of urbanisation,energy resources and other basic conditions,playing a driving and demonstration role for the whole economy of Xinjiang,and is a land-bridge gateway city cluster for cooperation with Central Asia.With the development of social and economic development,the conflict between man and land has become increasingly prominent,and a series of problems such as the reduction of biodiversity,soil erosion and desertification have gradually drawn attention to themselves.At the same time,the analysis of the driving forces of land use change in the economic zone on the northern slopes of the Tianshan Mountains and the scientific prediction of future land use have become key elements in the sustainable development of land resources in Xinjiang.The construction of regional ecological networks is of great significance in improving regional ecological safety and promoting regional energy circulation.As the main body of the ecological network,ecological corridors play a leading role in the construction and selection of ecological landscape paths.In this paper,based on land use data from 1990,2000,2010 and 2018,the InVEST model was used to analyse the habitat quality of the urban agglomeration on the northern slopes of the Tianshan Mountains.In addition,the morphological spatial pattern analysis（MSPA）method was used to analyse the landscape pattern and extract ecological source sites according to the patch importance index（d PC）,and the minimum cost path（MCR）method was used to identify The ecological corridors of the urban agglomeration on the northern slopes of Tianshan were identified using the minimum cost path（MCR）method,and the source sites and corridors were combined to form an ecological network in the study area.The main findings of the study are as follows.（1）Between 1990 and 2018,grassland is the most dominant land use type in the study area,occupying the largest share and contributing the most to the transfer out of other land use types;the area of built-up land shows a trend of steady increase year by year,expanding by 1.49%from 1990 to 2018 onwards,increasing by 1,282.40km~2,with the largest contribution to its expansion being arable land and un The area of water bodies shows a decreasing trend,mainly due to the fact that the area transferred out to become grassland and unused land is smaller than the area transferred in,reflecting the poor protection of water bodies;the area of unused land increases year by year,mainly due to the desertification phenomenon in the study area.（2）From 1990 to 2018,areas with low habitat quality dominated the entire study area,accounting for about 35%of the total area,with fluctuating changes in area;areas with lower habitat quality increased in a"V"pattern,decreasing from 1990 to 2000 and continuing to increase from 2000 to 2018.The area of lower habitat quality areas increased by 4149.33km~2 in 2018 compared to 1990;the area of medium habitat quality areas decreased in an inverted"V"shape,with a decrease of 3364.48km~2 in 28 years;higher habitat quality areas and high habitat quality areas directly reflect the overall ecological status of the study area.The Higher Habitat Quality Area and the High Habitat Quality Area directly reflect the overall ecological status of the study area,with the Higher Habitat Quality Area increasing overall,accompanied by fluctuating changes,with the Higher Habitat Quality Area showing a sharp increase in area between 1990 and 2000,and the High Habitat Quality Area showing a sharp decrease between 2010 and 2018,from 17.32%to 1.90%of the area.In terms of habitat degradation,the area of low degradation areas accounted for about 73%of the total area from 1990 to 2018,and the high degradation areas only accounted for about 0.6%,which can indicate a better ability in resisting environmental degradation,but low habitat quality and lower habitat quality areas accounted for about half of the whole study area,while higher habitat quality and high habitat quality areas showed an unstable change trend,reflecting the overall This reflects the high environmental sensitivity of the study area and the need to take targeted measures to maintain the ecological service value.（3）In this paper,the MSPA method was applied to analyse the land use prospect data,and the results showed that the core area accounted for 56.99%of the entire ecological land,concentrated in the southern and southeastern parts of the study area,reflecting a good spatial connectivity.By calculating the landscape connectivity index,15 ecological land patches with large and representative d PC values were extracted as ecological source sites,and land use,elevation,slope,normalised vegetation index（NDVI）,distance from residential areas and distance from roads were used as resistance factors to construct a comprehensive resistance surface in the study area.The ecological sources and corridors form the ecological network of the study area.（4）The ecological sources and corridors are concentrated in the central area of the study area,and the northern and southeastern parts of the study area are obviously sparse,which affects the overall landscape connectivity of the study area.Therefore,this paper proposes to add 5 planned sources and 11 new corridors.Road,identified 34breakpoints,planned the construction of source sites and corridors,and repaired breakpoints to help increase material and energy exchange between source sites and improve the overall landscape connectivity of the urban agglomeration on the northern slope of the Tianshan Mountains. |
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