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Based on the data of land use, urbanization rate and green cover in Chengdu from 2005 to 2020, landscape pattern index and regression analysis were used to explore the evolution of landscape pattern and its influencing factors in Chengdu in the past 15 years. The results showed that arable land, forest and artificial construction land were the main landscape types, and the area of the three landscape types changed significantly. Arable land landscape was the most dominant landscape, but its area decreased and the degree of fragmentation increased. The area of forest landscape increased year by year, and the degree of fragmentation decreased. The area of artificial construction land increased significantly, the degree of fragmentation increased, and the landscape dominance gradually increased. The overall trend of urban landscape fragmentation was that the connection degree of dominant landscape types gradually decreased, the degree of agglomeration decreased and the complexity increased, and the proportion of each type of landscape tended to be balanced. Urbanization rate was significantly correlated with landscape spread and diversity index. With the increase of urbanization level, the agglomeration degree of various landscapes in Chengdu decreased. Policy factors played an important role in the evolution of landscape patterns. Influenced by the “Park City” policy, the green coverage rate and the area of forest, shrub and grassland increased significantly in 2018. Land use policy was the main factor affecting the change of artificial construction and cultivated land area. The future land use planning should pay attention to the protection of cultivated land. [ABSTRACT FROM AUTHOR]

Rapid urbanization has had an important impact on the pattern and function of rural land use. To better understand the key drivers of the landscape pattern evolution in southern Henan in China from 1980 to 2020, we used techniques of GIS(Geographic Information System) technology and the geodetector model in the research area of landscape pattern evolution characteristics. The research results show that the land use transformation in the rural areas of southern Henan has been characterized by the conversion of production land to living land and ecological land, with the highest conversion rate and continuous growth of construction land, a decreasing trend of cropland, and continuous and stable growth of land for forest and water body in the past 40 years. Land use conversion in the rural areas of southern Henan is mainly concentrated in the northern, central, and southern areas, and the spatial conversion has shifted from mountainous areas to the plains. The center of gravity of forest, cropland, and water body has most obviously shifted, and human interference and ecological environment destruction are the main influencing factors. The overall landscape pattern in the rural areas of southern Henan has increased in fragmentation and landscape heterogeneity, evenness has decreased, irregular patches have increased, and landscape connectivity has decreased. The combined effect of the six dimensions of elevation, slope, night lighting, average annual precipitation, average annual temperature, and population density in the rural areas of southern Henan has led to the transformation of land use and changes in landscape pattern. Physical geographic factors are the main drivers of rural landscape pattern changes in southern Henan, while population density changes and urbanization are secondary drivers. The results of the study have important guiding significance for the further optimization of rural landscape patterns and the sustainable development of rural areas. [ABSTRACT FROM AUTHOR]

With the ecological protection and high-quality development of the Yellow River Basin rising to China's national strategy, the Yellow River Delta is facing a historic development opportunity, and the surface water problems in this region are becoming more and more severe. Owing to the dual effects of the swing of the Yellow River's channel and human activities, the surface water in the Yellow River Delta is in an evolving state. Consequently, it is important to pay attention to the ecosystem response caused by surface water evolution for the ecological protection and high-quality development of the Yellow River Delta. Drawing on ecological, economic, and network analysis, in this study, the ecological service and landscape effects of the surface water evolution in the Yellow River Delta from 1986 to 2019 are explored using remote sensing and socioeconomic data. The results are as follows: (1) The surface water in the Yellow River Delta has evolved significantly in the last 35 years. Artificial water accounted for the dominant proportion of the total water, and the composition of water tended to be remarkably heterogeneous. (2) The ecological services of the surface water in the delta increased significantly during the study period. The ecological services of the surface water improved to varying degrees except for sedimentary land reclamation. Tourism, materials production, and water supply became the leading service functions of the surface water in the Yellow River Delta. The proportion of cultural functions rose rapidly, and the share of regulatory functions shrank significantly. (3) The evolution of the surface water had an evident impact on the landscape pattern of the Yellow River Delta, which was manifested as physical cutting and spatial attraction. This demonstrates the comprehensive effect of protective constraints, spatial attraction, and spatial exclusion on the landscape pattern of regional land types. The results of this study have a certain guiding significance for the development and management of the water resources in the Yellow River Delta and also provide information for ecological protection in this region. [ABSTRACT FROM AUTHOR]