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Greenspace exposure and its dual role as mediator and moderator in the relationship between urban density and mental health 绿地暴露及其在城市密度与心理健康关系中的中介和调节双重作用
IF 9.2 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2025-09-16 DOI: 10.1016/j.landurbplan.2025.105497
Liu Hongxiao , Pang Yujin , Jiao Min , Sun Xiao , Ren Hai , Luo Le , Han Taotao , Li Yuan , Zheng Shanwen , Sui Chunhua
The relationship between urban density, urban green space (UGS) exposure, and mental health remains complex and understudied, particularly in rapidly urbanizing cities notably characterized by high-density development. Based on a survey of 824 respondents in Guangzhou, China, this study advanced prior research by systematically unraveling the dual roles of UGS exposure: UGS visitation played as a mediator and UGS availability served as a moderator in the urban density–mental health nexus—a critical gap in existing literature. Our key findings indicated that: (1) Urban density exhibited context-dependent effects: its impacts on three mental health indicators (depression, life satisfaction and sense of worthwhilenss) hinged on UGS availability. (2) Visiting community gardens, municipal parks, and waterfront UGS was particularly effective in reducing depression risk, enhancing life satisfaction, and fostering a sense of worthwhileness, respectively. Engaging with communal gardens and municipal parks was positively associated with all three mental health outcomes. The effects of UGS visitation on mental health surpassed those of UGS availability and urban density. (3) Crucially, we revealed a dual mechanism: UGS visitation fully mediated the adverse effects of high density on mental health, while UGS availability moderated this relationship, mitigating negative impacts of high urban density. These findings provide novel empirical evidence for optimizing UGS planning: increasing UGS and its visitation can reduce the negative mental health impacts of high urban density and prioritizing communal gardens and municipal parks is advisable, given their positive effects on three mental health outcomes.
城市密度、城市绿地暴露与心理健康之间的关系仍然复杂且研究不足,特别是在以高密度发展为显著特征的快速城市化城市中。基于对广州824名受访者的调查,本研究通过系统地揭示UGS暴露的双重作用:UGS访问在城市密度-心理健康关系中起中介作用,而UGS可获得性在城市密度-心理健康关系中起调节作用,这是现有文献的一个重要空白。研究结果表明:(1)城市人口密度表现出情境依赖效应,城市人口密度对抑郁、生活满意度和价值感三个心理健康指标的影响取决于城市人口密度的可获得性。(2)参观社区花园、市政公园和滨水UGS分别在降低抑郁风险、提高生活满意度和培养价值感方面特别有效。参与公共花园和市政公园与所有三种心理健康结果呈正相关。UGS访问对心理健康的影响超过了UGS可用性和城市密度的影响。(3)研究揭示了一个双重机制:城市人口密度对心理健康的负面影响完全由城市人口密度访问介导,而城市人口密度可获得性调节了这一关系,缓解了城市人口密度对心理健康的负面影响。这些发现为优化UGS规划提供了新的经验证据:增加UGS及其访问量可以减少高城市密度对心理健康的负面影响,优先考虑公共花园和市政公园对三种心理健康结果的积极影响是可取的。
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引用次数: 0
Vertical regulation of thermal stress by canopy structure in urban forests: The role of species composition 城市林冠层结构对热应力的垂直调节:物种组成的作用
IF 9.2 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2025-09-14 DOI: 10.1016/j.landurbplan.2025.105495
Jia Jia , Lei Wang , Yunlong Yao , Sungmin Lee , Robert D. Brown , Zhongwei Jing , Yalin Zhai , Zhibin Ren , Xingyuan He
Urban forest canopies serve as effective thermal buffers, yet their potential to mediate human heat stress through structural complexity remains underexplored. This study quantified canopy height, heterogeneity, and diversity characteristics, and examined their relationships with mean radiant temperature (Tmrt) across tree species with distinct cooling capacities. It further evaluated the overall cooling effects of forest community structure using a Generalized Additive Model (GAM) combined with Non-Metric Multidimensional Scaling (NMDS), and identified key structural thresholds influencing thermal regulation under varying levels of species compositional diversity via a segmented GAM. We found that: (1) Tree species with varying cooling performance differed by 1.43 °C in cooling intensity (mean Tmrt) and 0.013 in cooling stability (CV of Tmrt), with Tmrt in Strong–Stable performers exhibiting significant negative correlations with canopy height and vertical heterogeneity (r = –0.35 to –0.69, p < 0.001); (2) Overall Tmrt variation across communities was primarily driven by canopy height, with the NMDS axis explaining 30.9 % of the variation (p < 0.001). Heterogeneity characteristics, as indicated by mean outer canopy height, top rugosity, and canopy relief ratio, accounted for 27.9 %, while diversity characteristics contributed less (11.6 %); (3) With increasing species compositional variability, the structural response of Tmrt shifted from being dominated by a single factor to a coordinated regulation by multiple structural characteristics. In high-variability communities, mean height, top rugosity, canopy relief ratio, and vegetation area index jointly influenced Tmrt, with the model explaining 53.8 % of its variation. This study sheds light on the dynamic role of tree canopy structures in regulating thermal stress, offering insights for microclimate-responsive urban landscape design.
城市森林冠层是有效的热缓冲层,但其通过结构复杂性调节人类热应激的潜力仍未得到充分探索。本研究量化了不同制冷能力树种的冠层高度、异质性和多样性特征,并研究了它们与平均辐射温度(Tmrt)的关系。采用广义加性模型(GAM)结合非度量多维尺度(NMDS)进一步评价了森林群落结构的整体降温效应,并通过分段GAM确定了不同物种组成多样性水平下影响热调节的关键结构阈值。结果表明:(1)不同冷却性能树种的冷却强度(平均Tmrt)和冷却稳定性(CV)分别相差1.43°C和0.013°C,其中强稳定树种的冷却稳定性与冠层高度和垂直异质性呈显著负相关(r = -0.35 ~ -0.69, p < 0.001);(2)群落间Tmrt总体变化主要受冠层高度驱动,NMDS轴解释30.9%的变化(p < 0.001)。异质性特征(平均冠层外高、顶阔度和冠层起伏比)占27.9%,多样性特征占11.6%;(3)随着物种组成变异性的增加,Tmrt的结构响应由单一因素主导向多种结构特征协同调节转变。在高变率群落中,平均高度、顶阔度、冠层起伏比和植被面积指数共同影响Tmrt,该模型解释了其53.8%的变化。该研究揭示了树冠结构在调节热应力中的动态作用,为微气候响应型城市景观设计提供了见解。
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引用次数: 0
Participatory mapping with young people: Advancing on procedural justice 参与测绘与年轻人:推进程序正义
IF 9.2 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2025-09-13 DOI: 10.1016/j.landurbplan.2025.105492
Romina RODELA , Sofia LUNDMARK , Emma NORSS
This study explores the role of young people in urban planning through the lens of procedural justice, focusing on their engagement and participation in research seeking to further youth use and perception of public space. Conducted in Huddinge Municipality, Sweden, the research involved youth as co-researchers in participatory mapping exercises to document their spatial preferences and experiences. Findings highlight the importance of inclusive urban planning that recognizes young people as legitimate stakeholders. Liked spaces were often those that supported social interaction, physical activity, and autonomy, while disliked spaces in the municipality were those the young respondents associate with fear and feelings of discomfort. This study casts a perspective on the need for planning practices that accommodate diverse youth perspectives and promote equitable access to public spaces. Despite challenges in institutional uptake, the research demonstrates the potential of youth participatory methods to inform our understanding and practice for advancing towards more just and responsive urban governance. This work contributes to ongoing debates on spatial justice and the inclusion of marginalized groups in urban decision-making.
本研究通过程序正义的视角探讨了年轻人在城市规划中的作用,重点关注他们在旨在促进年轻人使用和感知公共空间的研究中的参与和参与。这项研究在瑞典哈丁格市进行,让年轻人作为共同研究人员参与绘制地图的活动,记录他们的空间偏好和经历。调查结果强调了包容性城市规划的重要性,承认年轻人是合法的利益相关者。喜欢的空间通常是那些支持社会互动、身体活动和自主性的空间,而不喜欢的空间是那些年轻受访者与恐惧和不适感联系在一起的空间。本研究提出了规划实践的需求,以适应不同的青年观点,促进公共空间的公平获取。尽管在机构吸收方面存在挑战,但该研究表明,青年参与式方法有潜力为我们的理解和实践提供信息,以推进更公正、更积极的城市治理。这项工作有助于开展关于空间正义和将边缘化群体纳入城市决策的辩论。
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引用次数: 0
Planning open and green spaces in Europe: Examining the importance of land-use regulations and their pursuit of efficiency and equity objectives 规划欧洲的开放和绿色空间:考察土地使用法规的重要性及其对效率和公平目标的追求
IF 9.2 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2025-09-13 DOI: 10.1016/j.landurbplan.2025.105489
Daniels Saakjans , Simona R. Gradinaru , Anna M. Hersperger
Open and green (O&G) spaces are central to sustainable, liveable and safe urban environments. As they are able to deliver many interconnected benefits within city constraints, O&G spaces are commonly used to promote public well-being, protect natural habitats, control pollution, mitigate natural hazards, and more. Despite their importance, O&G spaces are increasingly under pressure in densifying areas with growing urban populations. This calls for a better understanding of the land-use regulations responsible for their provision, protection and management. As a cornerstone of local planning in Europe, these regulations are crucial for sustainable urban management, which can benefit from the systematic analysis of their importance and objectives. Here, we use an online expert survey across 30 European countries to analyse the importance of local land-use regulations in the planning and permission-granting process and the extent to which they pursue efficiency and equity objectives. We form six groups of O&G space regulations for the study, based on their focus: (1) nature preservation, (2) pollution, (3) hazard mitigation, (4) safety, (5) availability and (6) access. Results show a clear order of importance among the groups, with nature preservation being the main regulatory concern. We observe an overall balanced pursuit of efficiency and equity in Europe, with some regulation groups focusing on efficiency over equity and vice versa. Nonetheless, significant variation in this balance emerges among countries. These findings are expected to provide an empirical basis for much-needed theory development and future comparative research on land-use regulations and O&G spaces.
开放和绿色空间是可持续、宜居和安全的城市环境的核心。由于它们能够在城市约束下提供许多相互关联的好处,因此o&g空间通常用于促进公共福祉,保护自然栖息地,控制污染,减轻自然灾害等。尽管它们很重要,但在城市人口不断增长的密集地区,O&;G空间正面临越来越大的压力。这就要求更好地了解负责提供、保护和管理这些土地的土地使用条例。作为欧洲地方规划的基石,这些法规对可持续城市管理至关重要,可以从对其重要性和目标的系统分析中受益。在这里,我们通过对30个欧洲国家的在线专家调查来分析当地土地使用法规在规划和许可授予过程中的重要性,以及他们追求效率和公平目标的程度。我们将o&&g空间规则分为六组进行研究,基于它们的重点:(1)自然保护,(2)污染,(3)危害缓解,(4)安全,(5)可用性和(6)可及性。结果显示,这些群体之间的重要性排序明显,自然保护是主要的监管关注点。我们观察到,在欧洲,效率与公平的追求总体上是平衡的,一些监管机构更注重效率而不是公平,反之亦然。然而,这种平衡在各国之间出现了显著差异。这些研究结果有望为土地利用规制与o&g空间的理论发展和未来的比较研究提供实证基础。
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引用次数: 0
Temporal changes in soil dissimilarity are driven by synergistic effects of tree types and geographical distance in city parks 城市公园树木类型和地理距离的协同效应驱动土壤差异的时间变化
IF 9.2 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2025-09-13 DOI: 10.1016/j.landurbplan.2025.105496
Saeed ur Rahman , Yucheng Bian , Xinxin Liu , Chang Zhao , Peiyuan Wang , Muhammad Khalid , Asad Rehman , Junfeng Cao , Noel Bruguera Amarán , Nan Hui
Urban parks play a crucial role in maintaining biodiversity and ecosystem functions within cities, making the study of their soil and microbial dynamics essential. This study investigates the temporal dynamics of soil properties and microbial community diversity across urban parks in Shanghai, exploring how intra-urban land-use characteristics, particularly park age and vegetation type, shape microbial community composition, with bacterial communities expected to respond more strongly to environmental homogenization and fungal communities, especially functional guilds, being more closely tied to vegetation traits. We observed distinct differences in soil physicochemical properties and microbial communities among city parks of different ages. Fungal communities maintain conserved distinction across tree types, while bacterial communities demonstrated remarkable functional and structural convergence. It is noteworthy that the changes in alpha and beta diversity exhibit inconsistent patterns across time, while the rate of convergence in beta diversity responses to intra-urbanization varies among taxonomic groups. The synergistic interaction between tree types composition and geographical distance is a key driver shaping soil microbial diversity, and neither factor alone is sufficient to account for significant diversity changes along the age gradient. Populations with high overall richness but low single-species abundance contributed more to alpha and beta diversity, including rare species and specialist species. Overall, this study highlights the importance of tree types composition in shaping microbial community diversity, providing valuable insights to complement intra-urban tree planting strategies.
城市公园在维持城市生物多样性和生态系统功能方面发挥着至关重要的作用,因此对其土壤和微生物动态的研究至关重要。本研究考察了上海城市公园土壤性质和微生物群落多样性的时间动态,探讨了城市内部土地利用特征(特别是公园年龄和植被类型)如何影响微生物群落组成,其中细菌群落对环境同质化的响应更强烈,真菌群落(特别是功能行会)与植被特征的联系更紧密。不同年限的城市公园土壤理化性质和微生物群落存在明显差异。真菌群落在不同树型之间保持着保守的差异,而细菌群落则表现出显著的功能和结构趋同。值得注意的是,α和β多样性随时间的变化规律不一致,而β多样性对城市化响应的收敛速度在不同分类类群之间存在差异。树种组成与地理距离之间的协同作用是影响土壤微生物多样性的关键驱动因素,任何一个因素都不足以解释土壤微生物多样性沿年龄梯度的显著变化。总体丰富度高、单物种丰富度低的种群对α和β多样性的贡献更大,包括稀有物种和特有种。总体而言,本研究强调了树木类型组成在塑造微生物群落多样性中的重要性,为补充城市内植树策略提供了有价值的见解。
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引用次数: 0
Exploring the role of ethnicity and culture in shaping greenspace practices: A qualitative study from Bristol, UK 探索种族和文化在塑造绿色空间实践中的作用:来自英国布里斯托尔的定性研究
IF 9.2 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2025-09-11 DOI: 10.1016/j.landurbplan.2025.105493
Andrew K. Palmer , Mark Riley , Laurence Jones , Sarah Clement , Karl L. Evans , Beth F.T. Brockett
Greenspaces provide multiple wellbeing and social benefits, yet ethnic minorities often have restricted engagement with these spaces which reinforces health inequalities. Addressing these requires a detailed understanding of the diversity of ethnic minorities’ perceptions, preferences, and practices relating to greenspaces. Through thematic analysis of interview and diary transcripts from 53 people from multiple ethnic minority groups in Bristol, UK, we identify various ways in which ethnicity and culture influence engagement with greenspaces. We find that cultural background and childhood experiences are particularly important in shaping attitudes towards greenspaces; transnational perspectives originating from cultural heritage and familial history influence how people perceive and adapt to UK greenspace conditions; and cultural considerations, perceived exclusion, and gender combine with intersectional identities to mediate experiences and engagement patterns. We draw from a novel integration of theoretical work on affordances with practices to theorise and synthesise these findings, contributing to understanding how cultural and social factors shape greenspace use. Our findings suggest that structured access initiatives, such as peer-led walking groups, and physical environment modifications, including zoning and washing facilities, can enhance the cultural inclusivity of greenspaces while addressing systemic barriers to engagement. These insights offer practical guidance for urban planners and greenspace managers seeking to create more equitable and inclusive spaces that reflect and serve increasingly diverse communities.
绿色空间提供了多种福利和社会效益,但少数民族经常限制与这些空间的接触,这加剧了健康不平等。解决这些问题需要详细了解少数民族对绿色空间的看法、偏好和实践的多样性。通过对来自英国布里斯托尔多个少数民族的53人的采访和日记记录的专题分析,我们确定了种族和文化影响绿色空间参与的各种方式。我们发现,文化背景和童年经历在塑造人们对绿色空间的态度方面尤为重要;源自文化遗产和家族历史的跨国视角影响着人们如何感知和适应英国的绿地条件;文化方面的考虑、感知到的排斥和性别与交叉身份相结合,调解了体验和参与模式。我们将理论工作与实践结合起来,对这些发现进行理论化和综合,有助于理解文化和社会因素如何影响绿色空间的使用。我们的研究结果表明,结构化的访问倡议,如同伴领导的步行小组,以及物理环境改造,包括分区和洗涤设施,可以增强绿色空间的文化包容性,同时解决参与的系统性障碍。这些见解为城市规划者和绿地管理者提供了实用的指导,他们希望创造更加公平和包容的空间,以反映和服务日益多样化的社区。
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引用次数: 0
Optimizing urban three-dimensional landscapes in potential development areas to mitigate urban heat island effect under shared socioeconomic pathways 共享社会经济路径下潜在开发区域城市三维景观优化与热岛效应缓解
IF 9.2 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2025-09-10 DOI: 10.1016/j.landurbplan.2025.105490
Shiyu Xiao , Jialyu He , Yao Yao , Xun Liang , Xia Li
The urban heat island (UHI) effect threatens human health. While optimizing the spatial structure of urban land use presents a promising strategy for UHI mitigation, few studies examined the feasibility of urban three-dimensional landscape optimization in potential development areas (PDA), resulting in unsuitable optimization results and computational inefficiency. To address these limitations, we develop a novel multi-objective optimization model for urban three-dimensional landscapes in PDA (3DLS-PO) that integrates the patch-generating simulation (PLUS) model and the particle swarm optimization (PSO) algorithm. The PLUS model first simulates the PDA in the future under different scenarios. The PSO algorithm then allocates urban land use in the PDA to mitigate the UHI effects with the explored nonlinear relationship between land surface temperature (LST) and urban two- and three-dimensional landscapes. We applied the 3DLS-PO model to the Tokyo Metropolitan Area (TMA) for 2030 under the shared socioeconomic pathway (SSP) scenarios. The SSP5 scenario achieves the maximum LST reduction of 5.18%, followed by SSP1 (4.60%) and SSP2 (2.34%). To mitigate the UHI effects in the TMA, high-rise buildings should be placed at the periphery of the TMA, low-rise buildings should be allocated to the suburbs, and green spaces should be scattered. The optimization results demonstrate substantial public health benefits, potentially preventing 3.01%-14.10% of heatstroke incidents in Tokyo. Incorporating the PDA also enhances the computational efficiency of the optimization process by 14 times. The 3DLS-PO model can provide support for addressing urban climate change.
城市热岛效应威胁着人类的健康。虽然优化城市土地利用空间结构是缓解城市热岛影响的一种有前景的策略,但很少有研究对潜在发展区(PDA)城市三维景观优化的可行性进行研究,导致优化结果不合适,计算效率低下。为了解决这些问题,我们在PDA中开发了一种新的城市三维景观多目标优化模型(3DLS-PO),该模型集成了补丁生成模拟(PLUS)模型和粒子群优化(PSO)算法。PLUS模型首先模拟了未来不同场景下的PDA。通过探索地表温度与城市二维和三维景观之间的非线性关系,利用PSO算法在PDA中分配城市土地利用以缓解城市热岛效应。我们将3DLS-PO模型应用于共享社会经济路径(SSP)情景下的2030年东京大都市区(TMA)。SSP5场景LST降低幅度最大,为5.18%,其次是SSP1(4.60%)和SSP2(2.34%)。为缓解城市热岛效应,应将高层建筑布置在城市边缘,将低层建筑布置在郊区,并分散绿化空间。优化结果显示出巨大的公共卫生效益,可能预防东京3.01%-14.10%的中暑事件。结合PDA还将优化过程的计算效率提高了14倍。3DLS-PO模型可为应对城市气候变化提供支持。
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引用次数: 0
The spatiotemporal patterns and dynamics of grassland established in the US conservation reserve program (CRP) 美国自然保护区(CRP)草地的时空格局与动态
IF 9.2 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2025-09-06 DOI: 10.1016/j.landurbplan.2025.105488
Shuchao Ye, Chaoqun Lu
The significant cropland expansion in the United States (US) has resulted in many environmental issues, such as soil erosion, biodiversity loss, soil and water pollution, etc. To mitigate adverse effects associated with cropland expansion, the United States Department of Agriculture (USDA) implemented the Conservation Reserve Program (CRP) in 1986, one of the US’s largest and most well-known acreage-reduction programs, to alleviate the environmental cost. However, the lack of time-series maps illustrating the spatial distribution of CRP constrains the evaluation of environmental benefits derived from the program. In this study, through integrating CRP statistics and multiple satellite-based land cover datasets, we developed a knowledge inference-based approach by considering CRP practices, contract period, and soil erosion effect to reconstruct CRP grassland maps. The map products developed here are designed to approximate the actual distribution of CRP grasslands, enabling quantitative assessment of CRP outcomes while reserving privacy and proprietary interests of individual farmers. The developed datasets cover the conterminous US from 1986 to 2020 with a resolution of 1 km by 1 km. Using CRP ground points across the US from the Rapid Carbon Assessment (RaCA) program in 2011, we validated the developed CRP map, achieving an overall accuracy of 90 % within a tolerance of 5 km. The results indicate CRP grasslands expanded from 0.60 Mha in 1986 to 10.19 Mha by 1995, then remained stable at around 10.00 Mha for the next decade. However, the area declined steadily to 5.78 Mha by 2020, driven by rising crop prices and the reduced CRP enrollment cap. Spatially, the areas with high CRP percentages were observed in the Midwest and Northwest, the west of the Southern Great Plains, and the north of the Northern Great Plains. In addition, the developed maps include two kinds of CRP grass practices, “the grasslands converted from the former cropland (CPCP)” and “the existing grasslands that were previously replanted from cropland (CPEG)”. We further found that 9–11 % and 12–24 % of CPCP and CPEG have enrolled in CRP twice during 1985–2020, respectively, which may lead to different potentials of CRP-associated carbon sequestration and greenhouse gas reduction compared with one-time or continuous CRP lands. Overall, the developed time-series maps can serve as a good reference to identify the spatiotemporal changes of CRP grasslands and to inform the modeling studies for assessing the CRP-associated environmental benefits and supporting future policymaking.
美国耕地的大量扩张导致了许多环境问题,如土壤侵蚀、生物多样性丧失、土壤和水污染等。为了减轻与农田扩张相关的不利影响,美国农业部(USDA)于1986年实施了美国最大和最知名的面积减少计划之一的保护储备计划(CRP),以减轻环境成本。然而,缺乏说明CRP空间分布的时间序列地图限制了对该计划产生的环境效益的评估。本研究通过整合CRP统计数据和多个基于卫星的土地覆盖数据集,提出了一种基于知识推理的方法,考虑CRP实践、契约期和土壤侵蚀效应,重建CRP草地图。这里开发的地图产品旨在近似CRP草原的实际分布,在保留个体农民隐私和专有利益的同时,能够定量评估CRP结果。开发的数据集覆盖1986年至2020年的美国连续区域,分辨率为1公里× 1公里。利用2011年快速碳评估(RaCA)项目中美国各地的CRP地面点,我们验证了开发的CRP地图,在5公里的公差范围内实现了90%的总体精度。结果表明,CRP草地从1986年的0.60 Mha扩大到1995年的10.19 Mha,并在未来10年稳定在10.00 Mha左右。然而,受作物价格上涨和CRP登记上限降低的影响,到2020年,CRP百分比稳步下降至5.78 Mha。从空间上看,CRP百分比高的地区分布在中西部和西北部、南部大平原西部和北部大平原北部。此外,已开发的地图还包括两种CRP草地实践,“从原农田转换的草地(CPCP)”和“以前从农田重新种植的现有草地(CPEG)”。在1985-2020年期间,CPCP和CPEG分别有9 - 11%和12 - 24%参与了两次CRP,这可能导致CPCP相关的碳固存和温室气体减排潜力与一次性或连续CRP土地不同。总体而言,所建立的时序图可以为识别CRP草地的时空变化提供良好的参考,并为CRP相关的环境效益评估和未来政策制定提供参考。
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引用次数: 0
Landscaping defensible space: Plant flammability testing informs recommendations to reduce community fire hazard 景观保护空间:植物可燃性测试为减少社区火灾危险提供建议
IF 9.2 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2025-08-30 DOI: 10.1016/j.landurbplan.2025.105483
Kristina Fauss , Joe V. Celebrezze , Robert Lloyd Fitch , Indra Boving , Rachel Dye , Max A. Moritz
The wildland urban interface (WUI) presents a unique planning challenge. Landscaped residential properties intersect with wild, fire-prone vegetation; however, WUI residents lack clear guidance on which plants pose higher or lower risk and how to manage vegetation to reduce fire hazard while also prioritizing landscaping design. This is largely due to the lack of information regarding how landscaping plants burn. This study provided a community-led approach to plant flammability testing, suggested an index to rank landscaping plant flammability, and offered landscaping guidance for residents of Southern California WUI communities. Community feedback revealed which ecosystem services (i.e., cultural: privacy) and plant species attributes (i.e., drought tolerance) were valued most by the community and helped identify common native species for flammability testing. Through laboratory flammability tests, interspecific differences in flammability were found as well as significant relationships between plant traits – hydration, branch, and leaf morphology – and flammability. Branching, mass, and drought stress were positively correlated with combustion intensity, whereas live fuel moisture (LFM) and stem surface area to volume ratio had a negative effect. These findings confirm the importance of minimizing plant mass near structures; carefully considering plant growth forms in planning; and maintaining healthy, hydrated plants in defensible space. With these considerations in mind, we discussed which defensible space zones could be best-suited for the tested plant species. Involving resident input and community horticulturalists in research direction allowed for targeted testing of species most relevant to the community of study and provided action-oriented collaborations with local stakeholders to improve fire-informed landscaping.
荒地城市界面(WUI)提出了一个独特的规划挑战。景观住宅与野生的、容易发生火灾的植被相交;然而,对于哪些植物具有较高或较低的风险,以及如何在优先考虑景观设计的同时管理植被以减少火灾危险,WUI居民缺乏明确的指导。这主要是由于缺乏关于景观植物如何燃烧的信息。本研究提供了一种社区主导的植物可燃性测试方法,提出了一种景观植物可燃性排名指标,并为南加州WUI社区的居民提供了景观指导。社区反馈揭示了社区最重视哪些生态系统服务(即文化:隐私)和植物物种属性(即耐旱性),并有助于确定常见的本地物种进行可燃性测试。通过实验室可燃性测试,发现了可燃性的种间差异以及植物性状-水化,分支和叶片形态-与可燃性之间的显着关系。分枝、质量和干旱胁迫与燃烧强度呈正相关,而活燃料水分(LFM)和茎表面积体积比与燃烧强度呈负相关。这些发现证实了尽量减少建筑物附近植物质量的重要性;在规划时仔细考虑植物的生长形式;在可防御的空间里保持健康、水分充足的植物。考虑到这些因素,我们讨论了哪些防御空间区域最适合被测试的植物物种。让居民和社区园艺师参与研究方向,可以对与研究社区最相关的物种进行有针对性的测试,并与当地利益相关者开展以行动为导向的合作,以改善了解火灾的景观。
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引用次数: 0
Research note: Surrounding landscape and local tree structure explain wear in boreal urban forests 研究说明:周边景观和当地树木结构解释了北方城市森林的磨损
IF 9.2 1区 环境科学与生态学 Q1 ECOLOGY Pub Date : 2025-08-30 DOI: 10.1016/j.landurbplan.2025.105485
Aku Korhonen, Leena Hamberg
Natural urban green areas in cities are susceptible to degradation due to high levels of recreational use and trampling induced wear. The aim of this study was to relate the amount of wear (paths and worn ground) in boreal urban forests to landscape-scale and local-scale predictors to help assess risks associated with urban densification. Wear was measured in 73 forests in three urban centers in southern Finland and analyzed in relation to surrounding residential density, amount of nearby forest area, and local forest characteristics. Median observed worn cover was 12 % while the most affected sites were over 90 % worn. Higher residential density and smaller forest area had independent exacerbating effects on wear. Wear was also related to tree structure and tended to be larger in forest interiors than near the edge. Our findings showcase how landscape transformations in growing cities may translate into risks of ecological degradation in urban forests.
城市中的自然绿地容易因高水平的娱乐使用和踩踏引起的磨损而退化。本研究的目的是将北方城市森林的磨损量(路径和磨损地面)与景观尺度和局部尺度的预测因子联系起来,以帮助评估与城市密度相关的风险。在芬兰南部三个城市中心的73个森林中测量了磨损,并分析了与周围居住密度、附近森林面积和当地森林特征的关系。中位数观察到的磨损覆盖率为12%,而最受影响的部位磨损超过90%。较高的居住密度和较小的森林面积对磨损有独立的加剧作用。磨损也与树木结构有关,在森林内部比在边缘更大。我们的研究结果表明,发展中城市的景观变化可能转化为城市森林生态退化的风险。
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引用次数: 0
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Landscape and Urban Planning
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