Coordinated Development of Land Use and Ecological Environment in Hefei Economic Circle

From the land use and ecological environment of Hefei Economic Circle,this paper established two sets of subsystem evaluation indicator system. It separately determined the weight coefficient of indicators in two indicator system. Using the coordination degree model,it made a scientific evaluation and analysis of coordinated development of land use and ecological environment in Hefei Economic Circle. Finally,on the basis of analysis results,it came up with pertinent recommendations for coordinated development of land use and ecological environment in Hefei Economic Circle.

Prediction of the joint impacts of sea level rise and land development on distribution patterns of mangrove communities

Mangrove distribution along shorelines shows distinct zonation patterns;thus,different communities may face various influences from sea level rise(SLR)and land use.However,long-term change predictions are usually based only on the total extent of mangroves.Few studies have revealed how SLR and land development such as agriculture,aquaculture,and urbanization jointly affect different intertidal mangrove communities.This study proposed a novel framework combining SLAMM(Sea Level Affecting Marshes Model)and the CLUE-S(Conversion of Land Use and its Effect at Small regional extent)model to assess the potential impacts on upper and lower intertidal mangrove communities.Maoweihai in Guangxi,China,was selected as the study area and the potential impacts from the squeeze effect and mangrove expansion potential were evaluated.We established three scenarios combining SLR and land use patterns to predict mangrove coverage projections by 2070.The results showed that,under a single SLR driver,the upper intertidal mangroves would be more adaptive to rapid SLR than the lower intertidal mangroves.However,under the combined influence of the two drivers,the upper intertidal mangroves would experience larger squeeze effects than the lower intertidal mangroves,with up to 80.5%of suitable habitat lost.Moreover,the expansion potential of upper intertidal mangroves would be considerably more limited than that of lower intertidal mangroves.The length of the expandable habitat patch boundary of upper intertidal mangroves only reached 1.4–1.8 km,while that of the lower intertidal mangroves reached up to99.2–111.2 km.Further,we found that aquaculture ponds and cropland are the top two land development types that could occupy suitable habitat and restrict the mangrove expansion potential.Our results highlight that timely improvement of land use policies to create available landward accommodation space for mangrove migration is essential to maintain the coverage and diversity of mangrove communities under SLR.The proposed method can be a helpful tool for adaptive mangrove conservation and management under climate change.

Carrying Capacity and Coupling Coordination of Water and Land Resources Systems in Arid and Semi-arid Areas: A Case Study of Yulin City, China

Quantitatively assessing the carrying capacity of water and land resources systems in arid and semi-arid areas is crucial for achieving the 2030 Sustainable Development Goals.In this work,taking Yulin City in China as a case study and employing the Criteria Importance Through Intercriteria Correlation(CRITIC)method,a modified model of coupling degree was developed to evaluate the car-rying capacity of water and land resources systems endowment and utilization,as well as their coupling coordination degree from 2013 to 2020.Our findings indicate that the water and land resources of Yulin are diminishing due to declines in agriculture,higher industrial water use,and wetland shrinkage.However,reallocating domestic water for ecological sustainability and reducing sloping farmland can mitigate this trend of decline.Temporally,as the coupling coordination between water and land resources system endowment in Yulin continuously improved,the coupling coordination between water and land resources system utilization first decreased and then in-creased with 2016 as the turning point.Spatially,the carrying capacity of water and land resources systems,the coupling coordination degree between water and land resources system endowment,and the coupling coordination degree between water and land resources system utilization in Yulin exhibited the same pattern of being higher in the six northern counties than in the six southern counties.Improving the water resources endowment is vital for the highly efficient use of water and land resources.

Coordinative Development Between Land Use Change and Regional Population-Resources-Environment-Development System—A Case Study of Jiangsu Province

Land use change has significant influence on the operation of the PopulationResources-Environment-De-velopment (PRED) System. Moderate land use is the key factor to ensure the coordinative and sustainable development between land use and PRED system. Based on the internal relationship between land use and PRED system, a PRED evaluation index system and a Press-Status-Response (PSR) model were established in this study. According to the expounding on the mechanism of the PSR model, we investigated the coordinative development between the changes of regional land use and PRED system taking Jiangsu Province as an example. The results showed that the orders of the Synthetic Index of Land Use (SILU) and the Variation of PRED Index (VPI) in Jiangsu are both the southern Jiangsu>the central Jiangsu>the northern Jiangsu. A cubic curve model was used to fit the relationship between the VPI and SILU. The inflection point of VPI was situated in 5.0 of SILU. When SILU was below 5.0, VPI increased with SILU, which will be helpful to the coordinative development between land use and PRED system. Based on those results, it is suggested that the land use degree of the southern Jiangsu, especially that of Nanjing City, should be moderately controlled at present, while land resources of the central Jiangsu and the northern Jiangsu should be further exploited.

The Coordination Effect of Marine and Land Resources Carrying Capacity of Coastal Areas in China

The carrying capacity of marine and land resources is one of the indicators to measure the sustainable development level of coastal areas,reflecting the supporting capacity of the ecological environment for human activities and the impact of human activities on the regional environment.This paper establishes an evaluation index system to determine the evaluation value of the carrying capacity of marine and land resources in China’s coastal areas,the evaluation index of marine and land resources supply capacity(economic and social development demand)subsystem,and the degree of coordinated development of the subsystems in 11 coastal areas from 2006 to 2017.The results showed that the average supply and demand capacity of the two subsystems in each region is not high;the average demand level of economic and social development is higher than the supply capacity of marine and land resources;the carrying capacity of marine and land resources is slightly overloaded in most areas;the collaborative development between the supply and demand subsystems is barely coordinated with moderate imbalance;most regions need to move in the direction of green development to ensure the supply capacity of marine and land resources.

Looking for a Chinese solution to global problems:The situation and countermeasures of marine plastic waste and microplastics pollution governance system in China

As one of the top ten environmental problems to be solved in the world,marine plastic waste and microplastic pollution seriously affect the health of marine ecosystems and the sustainable development of Marine economies.It is necessary to promote the establishment of a scientific and systematic Marine plastic waste and microplastic pollution control system and take strong measures to fundamentally curb and reverse the trend of marine pollution intensification in China.This paper first explains the practical significance of marine plastic waste and microplastic pollution control from three aspects:the sustainable development of the blue economy,the structural upgrading of the pan-plastic industry,and the improvement of public health awareness.Secondly,the particularity of marine plastic waste and microplastic pollution control system is summarized from three aspects of formation mechanism,migration path and damage performance.Then,it identifies domestic and international governance strategies and action plans from the perspectives of mechanism,subject,object,and measures,summarizes existing problems in the existing marine plastic waste and microplastic pollution control system,and gives directions for future improvement.Finally,some countermeasures and suggestions are put forward to accelerate the construction of China’s marine plastic waste and microplastic pollution control system,including the formation of a cross sectoral integrated land and sea control system,a full life cycle waste management process,a multi-participation model for marine ecological and environmental governance,and a global marine pollution prevention and control system.

Coordinated development of land multi-function space: An analytical framework for matching the supply of resources and environment with the use of land space for ecological protection, agricultural production and urban construction

Based on the carrying capacity of the resources and the environment,this article defines the connotation of the land multifunctional space(LMFS)from three aspects,ecological protection,agricultural production and urban construction,in the new era of land space planning system.Moreover,a framework is constructed for the coordinated development of the multi-functional oriented space to match the use of land space(ULS)with the supply of resources and environment(SRE).Based on this,the technology and methods of comprehensive evaluation,dominance recognition,and matching relationship division functions of the use of land space(FULS)and functions of the supply of resources and environment(FSRE)are discussed.The advantageous functions of the use of land space(AFULS)and advantageous functions of the supply of resources and environment(AFSRE)are also identified in the study area.A LMFS coordinated development system integrating“function position-comprehensive partition-regulation strategy”is proposed.Through the empirical study of Shandong province,we found that,first,the FULS of ecological protection space in the province is mainly found in high value areas,and the FSRE is mainly in low value areas,which has certain complementarity in the space.The FULS of agricultural production space is mainly observed in high value areas,the FSRE is mainly in middle value areas,and the spatial distribution is balanced and staggered.The FULS of the urban construction space and the FSRE are mainly in middle values areas,and the spatial distribution is basically similar.Second,the FULS in the study area is dominated by the single advantage of agricultural production and urban construction,while the FSRE has a relatively balanced distribution of the advantages of ecological protection,single agricultural production and compound advantages of agricultural production and urban construction,and urban construction and ecological protection.The matching between the two is mainly at high and middle levels.Specifically,70%of the province’s land space still has a certain development and utilization potential,and 30%of ULS intensity is close to or exceeds the resource and environment carrying capacity.Third,considering the comprehensive impact of resource endowment,social and economic development and policy and institutional environment on different matching relationships,this paper constructs the land spatial development strategic pattern of“two screens-seven regions-multicore”positioning and“four regions-eight categories”hierarchical area of Shandong at the macro level,and puts forward a differentiated land space development strategy.

Coordinated development efficiency between cultivated land spatial morphology and agricultural economy in underdeveloped areas in China:Evidence from western Hubei province

Suitable spatial morphology of cultivated land is a basic requirement for sustaining agricultural economic development in mountainous areas.Coordinated development efficiency of cultivated land spatial morphology and agricultural economy(CECA)is of great practical significance to measure the efficiency of cultivated land use,and thereby promote regional rural revitalization.However,few studies to date have focused on coordinated development efficiency between cultivated land use and agricultural economy in mountainous areas from the perspective of cultivated land spatial morphology.Thus,the present study explores CECA with this focus using the data envelopment analysis method,and analyzes the key influencing factors via a geographical detector model in 16 counties in western Hubei province.The results show the following:(1)CECA exhibits significant spatial heterogeneity that is high in the south of the study area and low in the north;(2)scale efficiency is the primary limiting factor for CECA;(3)the insufficient output of cultivated land use mainly restricts CECA in the south of the study area,while individual county in the north suffered from input redundancy and insufficient output;and(4)population density in the southern region has the most significant effect on CECA,and gross domestic product has the greatest impact in the northern region.The results contribute to the derivation of specific measures by which to promote cultivated land use efficiency and sustainable development of the social economy.

Measuring the Land-Sea Coupling Coordination Degree of the Coastal Zone and Its Optimization Strategy:A Case Study of the Coastal Zone in Xiamen

Currently,China has entered the period of land-sea coordinated planning,yet there are few studies on the interaction between land use intensity and sea eco-security in coastal zones.Therefore,taking the coastal zone of Xiamen as an example,this paper develops a comprehensive system to evaluate the coupling degree between spatial utilization intensity and eco-security based on the coupling degree theory in physics.Then the paper quantitatively analyzes and identifies the coupling coordination degree of various shore sections into four categories:well-coordinated and highly-coupled,moderately-coordinated and moderately-coupled,moderately-coordinated and slightly-coupled,and primary-level coordinated and slightly-coupled.Finally,it puts forward spatial planning guidelines for the four types of shore sections on the basis of land-sea coordination.Specifically,reserved ecological section should follow the principle of giving priority to the marine ecosystem,and strictly protecting the ecosystem and controlling development;ecological promotion section should follow the principle of optimizing land development based on the sea resources,and reserving space for transformation;restricted development section should follow the principle of land-sea balance,and only allowing low-impact development activities to achieve synchronous land-sea development;development leverage section should follow the principle of optimizing marine development based on land resources,giving full play to the advantages of coastal resources and featured coastal space,and achieving spatial optimization in accordance with people-oriented principles and local conditions.This research intends to provide a scientific basis for coastal zone planning and decision-making and a paradigm guide for gulf cities to coordinate the marine ecosystem and land development.

破解海岸带环境司法困境:基于陆海统筹原则

我国海岸带环境案件存在管辖权冲突、法律适用有争议、原告资格不明确、诉讼性质认定有争鸣、诉讼程序衔接未确定、司法执行机制不完善等环环相扣的问题,造成海岸带环境司法困境。究其根源,主要在于陆海“二分法”的分类思维影响较大,其与陆海统筹合为表里的内涵尚未得到全面、深入的理解。为破解海岸带环境司法困境,既要重视海岸带环境案件的特殊性,将其确立为类型化案件并由海事法院专门管辖,又要贯彻陆海统筹原则,实现司法规则内在融贯、法治环节协调一致。

向海图强:奋力谱写中国式现代化广西篇章的重要使命与历史责任

党的十八大以来,习近平总书记分别于2017年、2021年和2023年三次视察广西。2023年12月,习近平总书记视察广西时强调,广西要“解放思想、创新求变,向海图强、开放发展”。广西背靠大西南、毗邻粤港澳、面向东南亚,具有沿江、沿海、沿边与东盟“一湾相挽十一国,良性互动东中西”的独特区位优势。向海之路为奋力谱写中国式现代化广西篇章指明方向,向海发展是广西破茧成蝶的根本出路,向海经济是广西高质量发展的重要引擎,向海图强已成为广西新时代新征程的新起点。向海图强既是广西的机遇和优势,也是广西的责任和使命。伴随着系列相关政策文件、战略规划和行动计划的相继颁布实施,广西向海经济发展新格局初步形成。平陆运河建成通航后,将形成广西及西南地区通往东盟的运距最短、最经济、最便捷的运输通道。陆江湾海的联动将撬动区域经济版图,推动形成国内国际双循环战略链接的枢纽。2023年12月习近平主席应邀访问越南具有标志性意义,确立了构建具有战略意义的中越命运共同体,开启了中越两党两国关系发展的新阶段,谱写了新时代中越关系的新篇章,将更有利于广西的向海图强、开放发展。

海-陆交互作用与海岸带碳中和农业驱动

海岸带既是生态脆弱区也是低碳农业发展“前哨”。推动和发展碳中和农业符合时代所需,也符合绿色、可持续发展理念。基于此,本文阐述了在海岸带区域发展碳中和农业的相关问题和重要性。首先,本文阐释了海陆交互作用以及海岸带碳中和农业发展理念;然后,分析了海岸带碳中和农业驱动中的碳中和农业生物、人工光合作用与农业驱动以及该理念的工程化应用问题;最后,深入剖析了如何识别海岸带农业核心碳汇,包括原位监测、同位素标记与统计学分析方法,并在此基础上提出了农业碳汇增强技术,为后续海岸带碳中和农业的构建、发展和实践提供参考,同时对促进脆弱的海岸带生态系统的保护和绿色低碳农业的发展具有重要意义。

基于陆海统筹的资源环境承载力评价方法探讨

海洋、海岸带蕴含的资源丰富,与人类生存发展息息相关。近年来,随着海洋经济的迅速增长,自然岸线和滨海湿地面积减少、生物多样性降低、典型生态系统受损、近岸海域灾害频发、渔业资源减少等问题日益显现。如何从战略高度提升海洋经济,开发和保护并举,确保海岸带、海洋资源取用合理是新时代的重要课题。陆地和海洋是生态系统不可分割的组成部分,开展陆海统筹的资源环境承载力评价是衡量区域经济发展与生态环境是否协调可持续发展的有效途径。文章系统地梳理了承载力概念的发展历程,对比了常用的海洋资源环境承载力评价方法,初步构建了陆海统筹的资源环境承载力评价指标体系,并提出使用熵值法来确定指标权重,采用状态空间评价模型或TOPSIS模型进行承载力综合评价,可以体现陆地和海洋相互影响、相互制约的关系,并具有较强的可操作性,评价结果可以反映区域资源环境承载力的空间差异或随时间变化情况,能够为海洋和海岸带保护利用提供有效借鉴。

黄河流域生态承载力及人地关系可持续发展——基于异速生长模型的研究

厘清黄河流域人口与土地异速生长关系的空间分异特征与时空变化趋势对协调黄河流域人地关系,提高黄河流域生态承载力有重要借鉴意义。文章引入生物学异速生长模型对黄河流域生态承载力的人地协调关系进行研究。结果表明:第一,黄河流域城市主要以正异速二级,土地明显扩张类型为主,其在黄河流域上中下游占比分别为44.45%、52.94%和84.61%。第二,以2015年为分界点,黄河流域异速生长系数有显著的阶段性转换特征。2015年前黄河流域异速生长系数总体呈现下降趋势,2015年后则小幅提升。从2013年开始,黄河上游异速生长类型由正异速转为负异速,黄河中下游一直为正异速生长。第三,黄河上中下游异速生长系数的全局莫兰指数均为负数,异速生长系数呈现高低集聚分布态势。第四,从影响土地和人口数量变化的因素上看,工业化水平、金融发展对土地扩张和人口增长均有正向促进作用,政府干预可促进人口增长,但教育资源不足成为抑制人口增长的重要因素。从而得到以下政策启示:在提高城市土地利用率的基础上,上中下游城市群均应充分利用市场机制对城市建设用地进行资源配置,进一步提高城市建设用地的利用效率,积极推进土地的二次开发和利用,优化城市土地的利用结构,积极发挥城市集聚效应,合理规划城市增长边界。

新竞争优势导向下西部陆海新通道双向直接投资高质量发展的路径研究

双向直接投资对实现区域经济高质量发展和价值链攀升至关重要。随着共建“一带一路”倡议的提出和对外开放程度的加深,双向直接投资持续活跃,不仅为企业带来巨大的经济效益,同时能够在技术引进、效率提升等方面产生显著的溢出效应,有效赋能西部陆海新通道高质量建设。在高质量发展背景下,西部陆海新通道强调从经济、高效、便捷、绿色、安全五个方面进行高质量建设,在重新布局和整合国内外物流通道、新型基础设施赋能和贸易便利化等方面形成了新竞争优势。因此,围绕新竞争优势导向下西部陆海新通道双向直接投资高质量发展的内在机理、价值提升、短板分析以及实现路径的相关研究具有重要的理论与现实意义。文章基于2010—2021年中国东部、中部以及西部陆海新通道10省份的双向直接投资面板数据,从“数量”和“质量”两个维度研究西部陆海新通道双向直接投资高质量发展及其溢出效应。首先,通过分析国际贸易新竞争优势,识别西部陆海新通道双向直接投资提质增量的关键因素。然后,从通道物流效率、贸易便利化水平和新型基础设施建设三个方面分析双向投资高质量发展对西部陆海新通道新竞争优势的提升作用。其次,从“数量”和“质量”两个层面对双向直接投资的时空演进特征和区域差异进行深入分析,找出西部陆海新通道10省份双向直接投资短板。最后,根据研究结果为西部陆海新通道双向投资高质量发展提出针对性对策建议。研究表明,就目前西部陆海新通道10省份而言,双向直接投资在数量和质量方面都存在短板。与中国东部和中部省市相比,其数量短板主要体现在外商直接投资总量较少且增幅较小、对外直接投资增长速度慢且与东部地区差距较大;质量短板主要体现在外商直接投资环境负面效应突出、产业结构升级助力不明显、技术溢出效应不显著三方面以及对外直接投资水平偏低、政府支持和引导不足两方面。根据研究结论,建议依托贸易便利化、新型基础设施建设、发挥核心物流枢纽区位优势、培育企业对外直接投资核心竞争力、以规模效应带动要素资源高效聚集与流动实现西部陆海新通道双向直接投资提质增量。

“山海协作”:一项中国特色的区域协调发展制度安排

始于福建、成于浙江、拓展于全国的“山海协作”制度形成于我国解决区域经济社会发展不平衡问题的历史实践中,经历了地方政策探索、区域整体落地、全国制度化建设三个阶段,具有目标导向明确、政策衔接紧密和措施体系完备的特征。“山海协作”制度有别于西方协作型运行逻辑,在制度目标嵌入、制度内容共生、多元主体凝聚等机制运行中形成了融合型的实践逻辑,一定程度上消除了市场机制下区域发展的“马太效应”,展现出制度韧性和发展活力。未来“山海协作”制度还需因地因时进行制度创新,关注山海地位演进和数智时代需求,加快学理研究。

全域土地综合整治与农业农村现代化转型的协同机制

全域土地综合整治作为新时期破解乡村发展难题的重要举措,关系着农业、农村和农民的现代化转型。推动全域土地综合整治与农业农村现代化转型的协同,对于优化土地利用、促进农业规模经营、改善农村生态、加快城乡融合及激发乡村发展动力具有重要意义。研究发现:(1)全域土地综合整治与农业农村现代化的演进历程具有耦合性,经历了从关注实现农业生产力提升与农业规模化、机械化到农村产业升级与土地开发及盘活,再到重视乡村生产、生活和生态全面现代化与人—地—协同的3个阶段。(2)构建全域土地综合整治与农业农村现代化转型的协同联动体系需从组织、空间和目标等方面展开,组织协同上需构建能辐射带动土地以外其他资源整合活化的多元主体内外联动模式;空间协同上需把握空间的横纵向联系,注重多维空间的系统整合;目标协同上则需坚持全域尺度的转型发展,促进土地整治功能性、实践性与现代化转型内生性、全面性的协同。(3)典型实践案例表明,全域土地综合整治与农业农村现代化在组织、空间和目标上的协同,需构建多元主体协同机制以推动多重目标的实现,创新土地整治模式实现空间的差异化发展,通过优化生产、生活和生态空间实现乡村全域整治与转型发展。

赣江流域土地生态安全与社会经济发展耦合协调研究

以县级行政单位为基础,构建赣江流域土地生态安全评价指标体系和社会经济发展评价指标体系,以及两者的耦合协调模型。结果表明:在2000-2020年间赣江流域土地生态安全指数和社会经济发展指数均呈现“N”型发展趋势,两者耦合协调度在结构上呈波动上升趋势;2000-2020年间赣江流域耦合协调度的莫兰指数显著增加,表明耦合协调度具有显著的空间集聚特征,冷点区主要集中在上游丘陵地区,热点区集中在下游平原地区。赣江流域的耦合协调度首要障碍因素历经了生态、经济和医疗的变迁,社会经济系统的低水平发展是影响耦合协调度的最大掣肘。应进一步强化在绿色可持续发展模式下,激活社会经济发展活力,促进土地生态安全与社会经济高质量耦合发展。

论中国式现代化陆海空间全域同一化发展

时空演化规律显示,陆地是人类生活的山水家园,海洋是孕育生命的摇篮,人类生存与发展始终是和海洋连在一起的。在现代世界经济发展中,中国既是拥有辽阔地域空间的陆地大国,又是拥有广阔空间的海洋大国,海洋对国家安全和经济发展具有极其重要的战略地位。在历史发展长河中,中华民族从未中断过陆海空间全域同一化的历史文化经济发展进程。党的二十大后,在习近平新时代中国特色社会主义思想指引下,中国置身于伟大历史转折与第五次改革开放浪潮相互交融的、深入实施“双循环”国家大战略的更新历史性发展阶段。中国共产党领导中国人民在中国式现代化发展的新征程中,加快推进陆地国土空间与海洋(蓝色)经济发展,不断创新以“一带一路”倡议为显著标志的、陆海空间全域同一化发展的新形态新模式新方法,始终如一把握好“魂脉”与“根脉”融为一体的新理念,亦使之成为陆海空间全域同一化发展的“魂与根”。

面向东北海陆大通道的辽宁港口群协同发展耦合度研究

为推进东北海陆大通道的构建,利用2019—2022年度辽宁省六个港口的数据,运用熵权法和耦合协调模型,对港口群的整体协同度进行评价。评价结果显示,近四年辽宁港口群的耦合协同度一直处于濒临失调的状态,港口间的耦合协调度较低,自身协调度较低。应采取具体业务间的角色协调、统筹,加强港口间的协同,实现港口群的有序合理优化,最终达到整体功能大于局部功能之和的效果。