| The sustainable development of resource-based cities is a research hotspot in various disciplines today.As a typical petroleum resource city,Daqing,Heilongjiang Province,has various ecological problems in the development process of the resource industry that restrict the sustainable development of the city.Urban land use and ecological environment conditions,and at the same time promote the active transformation of the resource industry,and carry out this research on the evolution of landscape pattern and the response to human disturbance.This research is based on the principles of landscape ecology,taking the main urban area of Daqing,Heilongjiang Province as the research object,using the four phases of land use raster images in 1990,2000,2010,and 2018 as the basic data source to analyze the landscape in the region The evolution of pattern structure and the change process of landscape pattern index,from the perspective of human disturbance,explore the correlation between the temporal and spatial evolution of human disturbance and the process of landscape pattern change,analyze the driving factors and existing problems of the landscape pattern change in the main urban area of Daqing,and finally propose the landscape pattern Optimization strategies and ecological planning countermeasures.The main research results are as follows:(1)During the study period,the degree of human disturbance in the main urban area of Daqing increased significantly.From 1990 to 2018,the degree of human-made interference in the main urban area of Daqing increased significantly.The severely disturbed area gradually expanded eastward,and the slightly disturbed area changed from a clustered distribution to a decentralized distribution,and the landscape continuity decreased.(2)The landscape pattern of the main urban area of Daqing has changed significantly in the past 30 years.During the study period,the area of grassland and cultivated land in the main urban area of Daqing accounted for a relatively large area,showing a clustered distribution,and the woodland and wetland landscape types were scattered.During the study period,the construction land expanded to the northeast.The landscape pattern of the study area tends to be integrated as a whole,and the fragmentation of local landscape types has deepened.(3)The evolution of human disturbance has a significant correlation with the landscape pattern.The degree of human disturbance is obviously related to the evolution of landscape pattern:as human disturbance increases,the complexity of landscape shape decreases,heterogeneity and landscape diversity decrease,and landscape fragmentation increases.Human factors are the main driving factors for the evolution of landscape pattern.(4)Standardizing human activities,guided self-repair programs,and perfecting the spatial pattern are important strategies for optimizing the landscape pattern.Specifically,it includes hierarchical control of human activities from the source of interference,moderate reduction of the impact of human interference activities on the ecosystem,reasonable allocation of land resources,and improvement of resource utilization;hierarchical use of guided patch self-repair programs to ensure that broken patches in areas of various interference levels can be Reduce restoration costs while achieving efficient restoration;start with improving landscape heterogeneity,functional diversity,and edge buffer zones,improve the regional spatial pattern,and at the same time improve the construction of green space in the central urban area,and achieve the overall optimization of the landscape pattern.This paper studies the response to the temporal and spatial evolution of the landscape pattern and human disturbance in the main urban area of Daqing,and explores the strategy of landscape pattern optimization,so as to provide a theoretical reference for future researchers and related practitioners to carry out research on resource-based urban landscape pattern optimization;at the same time,this research Provide basis and reference for realizing healthy and sustainable development in the future urbanization process of Daqing. |
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