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In recent years, global attention to forest ecological environment, carbon, wood yield, and biodiversity has been increasing, which requires forest managers to make reasonable forest planning in time and space to meet the needs of multiobjectives and multi-resources. In this study, the resources of business units in Northeast China were analyzed, and the FPS-ATLAS model was established. A multi-objective decision supporting spatial forest planning scheme for 16629.53 ha of forest in Jingouling forest farm of Wangqing Forestry Bureau in Jilin Province was proposed. In this paper, the volume growth model of six forest types was established, and the carbon storage model was introduced to show the total carbon, biomass carbon, dissolved organic carbon, and total soil carbon of the ecosystem. The dynamic change in carbon during the whole planning period has achieved good results. After 20 time periods, the total soil carbon increased to 7,627,208 Mg (+6.63%), the total ecosystem carbon increased to 14,889,876 Mg (+27.51%), the biomass carbon increased to 5,362,779 Mg (+59.70%), and the dissolved organic carbon increased to 9,531,906 Mg (+14.59%). The purpose of this article is to achieve dynamic management of forest resources, meet multiple constraint settings, achieve multiple management objectives, harvest wood products, and ensure the ecological and social functions of forests so that forests ultimately achieve the ideal state of sustainability. [ABSTRACT FROM AUTHOR]

In China's pursuit of modernization, the government has introduced the rural revitalization strategy to combat rural decline, foster balanced urban–rural development, and reduce the urban–rural gap. Rural human settlements, as key components of this strategy, play a vital role. This paper examines the types and characteristics of human–earth relationships within rural settlements, emphasizing their significance. Using national land use and population census data, we analyze the spatiotemporal evolution of rural settlements at the county level, investigating landscape pattern changes, assessing the degree of coupling coordination between rural population and settlements, categorizing relationship types and features, and estimating the potential for remediation. Our findings reveal a growing trend in the scale of rural human settlements, particularly sourced from arable land, with significant expansions observed in the North China Plain and Northeast Plain, indicating potential for farmland reclamation and village consolidation. Landscape patterns of rural human settlements exhibit increased fragmentation, complex shapes, and aggregation. We categorize the utilization of rural human settlements into two types, each with four distinct features: human–land coordination is observed in regions characterized by either a higher rural population and larger rural settlement areas, or lower rural population and smaller rural settlement areas. Human–land trade-offs are evident in areas where there is either a higher rural population and smaller rural settlement areas, or lower rural population and larger rural settlement areas. This provides valuable insights for the Chinese government's context-specific implementation of the rural revitalization strategy. It also serves as an experiential reference for the governance of rural human settlements in other developing countries. [ABSTRACT FROM AUTHOR]

This paper explores the placement and function of the discipline of geography in the expansion of the Japanese empire, doing so through the prism of the work and field research of Tada Fumio, a leading geographer in Japan both before and after 1945. This examination of this aspect of Tada Fumio's career and its interweaving with the construction and consolidation of Japan's empire will broaden recent studies of imperial Japan's simultaneous encounter with geopolitics and fascism while engaging with Japan's developing ideas about geography as a political and cultural discipline. This paper demonstrates the importance of the entwined histories of Japanese and German geographers in the Japanese empire, as well as documenting Tada Fumio's activities in Manchuria (northeast China) and on the Korean peninsula. Finally, the paper reveals fissures in the historical record of Japanese geographers in continental Asia and, until such time as more subaltern voices can be found, seeks to lay down the foundation for further research on the study of geography in the Japanese empire. • Connections between German, Japanese and Korean Geographers prior to 1945. • Teaching and research in academic geography in the Japanese Empire. • Tada Fumio's connections with Keijo Imperial University, colonial Korea and Japanese Empire. • Field work expeditions including Tada Fumio to Manchuria and Mengjiang. [ABSTRACT FROM AUTHOR]

Microplastics (MPs) pose a significant global concern, requiring a multifaceted approach to their risk assessment procedures, especially concerning their characteristics in the environment. The Horqin Left Middle Banner in Northeast China was chosen for the research region to investigate the abundance, composition, distribution, and ecological impact of MPs in surface agricultural soils. The concentrations of MPs ranged from 300 to 12800 items/kg, with a median concentration of 1550 items/kg (average = 1994 items/kg). The normal-sized MPs (500–5000 µm) had a higher relative abundance than small MPs (<500 µm). MPs were mainly derived from textiles and packaging and were affected by atmospheric transportation. Rayon and PET fibers were the main polymers identified. Furthermore, the potential environmental risks posed by the fundamental characteristics (abundance, chemical composition, and size) of MPs were quantified using multiple risk assessment models. The conditional fragmentation model indicated a propensity for MPs to degrade into smaller particles. Ecological risk assessments using pollution load index, pollution hazard index, and potential ecological risk index models revealed varying levels of risk. This study conducted a comprehensive assessment of the ecological risks of MPs based on their environmental characteristics, emphasizing the importance of considering multiple factors in the risk assessment process. This study investigates the occurrence, distribution, and ecological risk of microplastics (MPs) in agricultural soils of the Northeast Plain of China, a major food production area. MPs are persistent organic pollutants that can pose threats to soil health, crop quality, and food security. By analyzing the composition, size, and source of MPs, as well as their fragmentation and stability in soil, this study provides valuable data for assessing the environmental risk of MPs in agricultural regions. The study also suggests strategies for mitigating MPs pollution and protecting soil ecosystems. [Display omitted] • Evaluated the occurrence, distribution, and risks of MPs based on their properties. • Most MPs are normal-sized (>500 µm) and tend to break into smaller pieces. • MPs mainly derived from textiles and packaging (Rayon and PET, and coated paper). • The featured high-risk sites are mainly caused by polyacrylonitrile. [ABSTRACT FROM AUTHOR]

• This paper proposes a multi-dimensional assessment framework for cropland use stability. • Multi-dimensional cropland use characteristics present significant spatial differentiation. • Cropland stability in Northeast China Plain and Loess Plateau is the highest and lowest. • Urbanization will lead to about 9.31% of high-stability cropland losses in 2030. • Integrating landscape stability and national planning can draft a sustainable-oriented strategy. Shifting to more sustainable use can curb cropland resource degradation and improve production resilience. However, most cropland use assessments are unilaterally focused on biophysical levels and productivity, ignoring the multi-dimensional aspects of degraded cropland. This study attempts to describe cropland use stability in China by proposing a multi-dimensional assessment framework (including quantity, quality, management, service, and risk) to provide a reference for designing land degradation-neutral strategies. Results show that multi-dimensional cropland use characteristics present significant spatial heterogeneity. Western regions are reserve resource agglomerations that can replenish cropland quantity. In contrast, main grain-producing areas cover most current resources with preferably cultivation quality, management efficiency, and ecosystem services, while risk resistance is weak (especially in Middle-lower Yangtze Plain). Generally, the stability of cropland use in Northeast Plain is the highest and in Loess Plateau the lowest. Besides, urbanization will occupy about 9.31% of the high-stability cropland in 2030, of which 70.29% will occur in Northeast Plain and Huang-Huai-Hai Plain. The total potential productivity loss in Huang-Huai-Hai Plain alone will reach 100.1 kt, equivalent to supplying the food demand of 199,200 people annually. Therefore, a sustainable-oriented refined cropland management strategy should be designed according to the hierarchical nested spatial layout of comprehensive planning-stability map-multi-dimensional utilization characteristics to ensure the loss-replenishment balance and stable production. [ABSTRACT FROM AUTHOR]

This article discusses the continuity between cosmopolitan collaboration and wartime collaborationism from 1932–1941 by exploring the Chinese Maritime Customs Service (CMCS) and its international staff. The CMCS managed China's international trade and directed the custom houses in northern China before 1937, and in occupied China and free China from 1937–1941. The customs revenues generated by this international trade were pledged to service China's international obligations. This article argues that both Chinese and Japanese staff members' activities to maintain the status quo could be considered as wartime collaborationism from the perspectives of Japan, Manchukuo, and the Collaborationist and Chongqing governments, but all parties tolerated their activities until the outbreak of the Pacific War. The reason for this was that all parties benefitted from the CMCS's management of international trade and its implementation of international obligations which had existed since the mid-nineteenth century. This article situates wartime collaborationism within the long-existing institutional network that was welcomed as cosmopolitan collaboration in the prewar, wartime, and postwar periods, rather than treating it as a unique wartime setup and ideology. Such a view also illuminates the postwar exchange of personnel and cooperation among former enemies, which grew out of prewar collaboration and wartime collaborationism. [ABSTRACT FROM AUTHOR]