Urban Nature Research Articles

Mapping wild nature areas to identify priority areas for urban rewilding in cities: A process-oriented approach

Urban rewilding initiatives are gaining traction in cities, yet little remains known about the spatial opportunities for transitioning greenspaces into rewilding sites. This paper advances a process-oriented framing of urban wild nature areas (WNAs) and proposes a novel methodological approach for mapping existing WNAs at the city-scale, thereby shedding light on the potentials for urban rewilding across greenspace types and urban environments. Using Vienna as a case study, we identify WNAs as greenspaces predominantly shaped by natural succession processes and devoid of vegetation management. NDVI timeseries derived from Sentinel-2-satellite data for the period 2017–2022 are processed using a Random Forest algorithm to distinguish between unmanaged and managed vegetation annually and integrated into a multi-year composite map of ‘urban vegetation management intensity’. Based on this map and a set of objective cut-off values, 1298 WNAs are identified, representing 29.5 % of the city’s total urban greenspace and 14.9 % of the city’s total area. WNAs are distributed across diverse urban settings and greenspace types, with the majority being found in formal greenspaces such as forests, meadows and parks, and low-density built-up areas. The key strength of the process-oriented approach lies in its ability to detect WNAs dominated by natural succession, regardless of historic origin, greenspace type, and governance structure, thereby providing a baseline against which the full potential for urban rewilding can be evaluated. We demonstrate the methods’ utility in identifying potentials for urban rewilding, emphasising the importance of directing rewilding efforts towards residential greenspaces, urban parks, and street greenery, especially in densely built inner-city districts.

Exploring associations between urban soundscape and contextual factors based on a textual data-driven analysis and mapping approach: A case study in Daejeon, Korea

In soundscape research, it is crucial to understand how contextual factors are associated with people’s perception of acoustic environments. This study proposes a Textual Data-driven Context Analysis and Mapping Method (TD-CAMM), aiming at comprehensively exploring the intricate relationship between soundscape and contextual factors. Through a case study employing TD-CAMM, we demonstrate its effectiveness in quantitatively analyzing text-based contextual data, facilitating the identification of patterns and interrelations among diverse contextual elements via statistical analyses. Utilizing collected contextual data including the purpose of visit, time of use, sound source, emotion, and perceived affective quality, we conducted a hierarchical cluster analysis to characterize soundscapes of the selected locations, revealing four distinct clusters. Subsequently, association rule analysis was performed to identify unique associations among contextual elements shaping the soundscapes within each cluster. Cluster 1, the 'Nightlife Zone of Noisy Urban Settings' was characterized by 'Restless' and 'Noisy' emotions associated with nighttime activities. Cluster 2, the 'Lively Human-Centered Zone for Day and Evening Activities' reflected vibrant human interactions. Cluster 3, identified as 'Restless and Noisy Urban Traffic' was marked by transportation sounds, emphasizing urban bustle. Lastly, Cluster 4, the 'Tranquil Urban Nature Walk' encompassed serene natural spaces with 'Tranquil' emotions amidst natural sounds. These findings present a comprehensive approach to evaluating urban soundscapes, with potential applications in future urban soundscape research and design.

Talking to the young generation: perception of nature-based solutions’ attractiveness by children from Generation Z

ABSTRACT Current studies on nature-based solutions (NBS) in urban areas often overlook young people, who are essential users of urban spaces. Our study from the Czech Republic fills this gap by investigating how children (Generation Z, 11–15 years) perceive 12 NBS and 3 grey infrastructure measures and their ecosystem services (ES). Results from an image-based questionnaire survey indicate that water features, trees and flower beds are the most attractive for spending leisure time, while most other features were perceived as relatively unattractive by the children surveyed. In addition, the results highlight oxygen production as the most valued service by children, followed by biodiversity support and aesthetic function. This study emphasises the need for inclusive management of NBS and recognises the role of multiple stakeholders, including children, in creating attractive urban spaces. Key policy highlights Exploring the preferences of Generation Z towards different nature-based solutions Some measures and benefits were perceived as more attractive and important Water features, trees, and flower beds were rated as the most attractive measures Oxygen provisioning, biodiversity, and aesthetics were identified as the most important benefits Children and young people are essential users of urban nature and public spaces

Conservation beyond biopolitics: Vulnerability and abundance in Chennai's nature‐cultures

AbstractThis paper examines the possibilities for nature in contemporary times through a ground‐up investigation of nature practices in Chennai, India. It navigates dissonant strands of scholarship on the promise of urban regions as sites of exemplary social natures with an analytical framework that examines how autonomous nonhuman life in Chennai is variously enabled and inhibited. By studying a breadth of natures and nature practices within this urban site (instead of focusing on a particular species or habitat), the paper illuminates the socio‐material processes that undermine some natures even while supporting others, highlighting paradoxical responses to nonhuman agencies and resilience within the domain of ecological concern. The simultaneous analysis of Chennai's abundant and diminishing natures explains dissonances in urban natures scholarship, while offering fresh insights on more equitable approaches to nonhuman nature in human‐dominated landscapes. Specifically, it points to the value of reconfiguring concepts and practices of nature, both within and beyond conservation, in ways that are attentive to the plural forms of nonhuman flourishing and experiential vulnerability. Any meaningful prospect for more‐than‐human futures in urbanising worlds, the paper argues, rests not on biopolitical conservation that seeks to reproduce the past or build future ecologies of ‘legitimate’ natures, but on desisting from the displacement of, and re‐allowing room – conceptual, material and ethical – for already existing natures, whether scientifically valued or unintentional, whether imperilled or flourishing.

Access to green and gray urban nature amenities: exploring equity in Montreal's built environment

ABSTRACT Contemporary ideologies have identified two main paradigms contributing to sustainable cities: green urban and gray urban nature. The first refers to features that make cities greener, such as parks or tree coverage. The second refers to gray but sustainable areas, such as dense areas or the proximity to key amenities that can foster active travel. Accessibility to green and gray urban nature amenities by active transport is essential for evaluating if cities are sustainable. We analyzed the accessibility to green (green spaces) and gray (food stores and pharmacies) urban nature in Montreal. The findings show that most people have sufficient access to green and gray urban nature, and low-income groups have better access than high-income groups. Areas with access to both tend to be highly dense, suggesting that dense areas have sustainable attributes. Transport planning interventions in areas lacking access are necessary to achieve sustainable goals in Montreal.

Illuminating radical spatial imaginaries: Counter-mapping urban environmental justice struggles for the city yet to come

Urban greening is not a neutral intervention on the social fabric. Critical analyses of the green city often concentrate on greening's top-down, hegemonic, and large-scale manifestations while neglecting the role of social movements. Aiming to address this gap, we ground discussions of “urbanized nature” within discussions of radical spatial imaginaries, concentrating on their performativity. We propose “counter-mapping” as an engaged methodology, developed with local activists, to illuminate radical green imaginaries. Examining 13 environmental justice struggles in Barcelona, we find place imaginaries to be tied to preserving unique sites, linking historical trauma to fears of future spatial fixes, and projecting inclusive, liveable neighborhoods as ideal futures. This study underscores the importance of comprehending how resistance to the prevailing “green-paradox” manifests in local contexts. Through this exercise, we might help make clearer the axes of common/divergent imaginaries and forge alliances, dialogues, and reflection among local movements and decision makers in Barcelona and beyond.

Urban Nature Reserves Waste Challenges from Neighboring Informal Settlements: Western Cape, South Africa

Nature reserves have played a crucial role in biodiversity conservation for decades. Rapid urban sprawl has increased the amount of solid waste created by littering and illegal dumping in metropolitan nature reserves. This paper examines how two nature reserves, Wolfgat Nature Reserve and Witzands Aquifer Nature Reserves, can combine community conservation with waste management. To determine aspects such as the socioeconomic impact of the nature reserves on the surrounding communities, questionnaires with a specific focus on the topic were distributed to the surrounding communities and subsequently administered. Data was collected using semi-structured interviews with key informants from the nature reserve staff and observational methods, and SPSS was used to analyze the data. Consistent with previous research, this study revealed that ignoring local populations frequently results in people disobeying the appropriate regulations in these protected areas and that education does not guarantee conservation support. Despite this, the survey revealed an absence of community participation; conservators were more reactive than proactive. In this study, the level of education, which in some studies is always associated with knowledge, was contradicted; those with post-secondary education knew little about these areas, and the vast majority of participants were unaware of the protected areas just a few kilometers away from their communities.

What determines the synergy among urban systems? Evidences from the Yangtze River economic belt over 20 years

China's urbanization has reshaped landscapes, economies, and societies nationwide at unprecedented paces, yet inconsistent march among these processes has resulted in insufficient and unbalanced urban development. Here, we constructed a Population-Land-Economic-Social urbanization (PLESU) system with multiple elements and interaction flows, and explored the spatiotemporal dynamics and influencing factors of the coupling coordination degree (CCD) among PLESU system in 110 prefectural-level cities of Yangtze River Economic Belt (YREB) from 2000 to 2020. Results indicated that the CCD evolution exhibited significant path dependence during the past two decades, with considerable room for improvement. A key finding was that the low-quality development of land urbanization and social urbanization subsystems was the main factor for the lack of synergy among PLESU system, with land finance dependence and municipal investment confirmed to have significant impact on this. Furthermore, results also highlighted narrowing inter-regional differences in the CCD among downstream, midstream and upstream, revealing clustering of CCD in urban agglomerations, yet differing in their internal differentiation patterns and drivers. Exploring the synergy among urban systems will raise policymakers’ awareness of the necessity for embracing a holistic approach toward better sustainability by considering the insufficient and unbalanced nature of urbanization.

Assessing multiple ecosystem services in 708 European urban areas

ABSTRACT Nature is increasingly recognized for its potential to address societal challenges in cities, through the delivery of ecosystem services (ES). However, large-scale assessments quantifying this potential are rare. In this study, we modelled five ES (local temperature regulation, flood control, global climate regulation, habitat maintenance, and human interaction with nature) across 708 European urban areas. Using a supply-demand approach, we assessed ES delivery: the extent to which ES supply was sufficient to meet the corresponding societal demands. We found that ES delivery varied both spatially and between ES. On average, nearly 50% of the demand was fulfilled, with the highest values for habitat maintenance (81 ± 15%; mean ± SD), flood control (65 ± 13%), and human interaction with nature (59 ± 15%) and much lower values for local temperature regulation (23 ± 28%) and global climate regulation (16 ± 28%). We further found positive pairwise correlations between all ES (Spearman’s ρ from 0.15 to 0.65), with the strongest correlation between habitat maintenance and global climate regulation. Variation in ES delivery across the urban areas was mainly related to differences in the share of green space and the size of the urban areas, whereby ES delivery was positively related to both. Our broad-scale comparative assessment can serve as a starting point for more sophisticated model-based assessments quantifying the full potential of urban nature to meet societal demands across large areas, for example by including a broader set of ES and accounting for city-specific demands.

Moving Towards a Holistic Approach to Circular Cities: Obstacles and Perspectives for Implementation of Nature-Based Solutions in Europe

Nature-based solutions (NBS) are frequently implemented without taking the system’s perspective into account and with the main focus on technical and economic issues of implementation. This study was conducted to test the hypothesis on the potential synergistic effects between circularity and NBS to holistically tackle urban challenges. The main objective is to establish preliminary insights on the obstacles and perspectives of NBS integration and implementation, through a questionnaire set up by the network of experts gathered within the COST Action CA17133 Circular City. The following research questions arise: (i) what differences exist in the level of NBS application according to the variance of engaged countries; and (ii) what are the main obstacles and perspectives for the NBS implementation in order to holistically tackle urban challenges, enhancing the sustainable connection among urban environment, nature, and human well-being. To go beyond the current state-of-the-art and reflect on the research conducted within the Circular City Action, this study aims to open a multi-geographical academic dialogue across Europe and beyond and to move towards a holistic approach to circular cities. Accordingly, this study is: (1) multi-geographical and context-based, providing input for thirty-three EU countries and four non-EU countries to give an overview of the main obstacles and perspectives of NBS implementation, and (2) approach-directed, aiming to formulate a holistic approach to deal with societal challenges. This document intends to provide qualitative and quantitative insight into the potentials and obstacles of NBS implementation in Europe, as well as to motivate further discussion and research to achieve holistic and sustainable cities.

Informal Urban Biodiversity in the Milan Metropolitan Area: The Role of Spontaneous Nature in the Leftover Regeneration Process

The present study reflects on spontaneous nature’s agency to reclaim abandoned urban areas in Italian urban brownfields, providing a focused analysis of the Metropolitan Area of Milan. These spaces are the products of phenomena, such as deindustrialization, demilitarization, and uncontrolled urban expansion, which have produced a compromised heritage and challenges to regeneration. Such abandonment sometimes produces new forms of urban nature, which suggests a possible path for ecological regeneration and coexistence, as affirmed by the multidisciplinary literature. The related informal urban biodiversity grows regardless of future planning provisions, triggering unexpected transformations of the urban environment and producing socio-ecological value, as demonstrated by citizens’ recognition of these places. The present study maps informal urban biodiversity in the Milan territory, identifying the presence of large contaminated sites, relevant urban voids, vacant lots, and former agricultural spaces. This study also reflects on possible paths for urban planning and policies to integrate informal urban biodiversity within the urban ecological structure by analyzing the main features and challenges of the corresponding regeneration processes.

City Limits: Urban Nature Rules and the Role of Civic Engagement in Minneapolis—St. Paul Metro Area, USA

Formal rules define urban governance, yet in democratic systems like the United States, institutions governing public input shape decision-making. Governance literature needs more breadth on how civic engagement varies across types of nature and its implications for urban social-ecological systems. We analyzed five cities’ ordinances within the Minneapolis-St. Paul metropolitan region, identifying nature-based rules and civic engagement mechanisms. We found ten engagement mechanisms across six nature types, primarily discussed within zoning ordinances—farm animals being the exception. Public hearings were the most frequently mentioned engagement mechanism, yet they have documented biases toward elite perspectives. Despite codification of engagement opportunities, it remains unclear whether utilized mechanisms support substantive input and influence into urban nature governance. Our study not only lays groundwork for research on how to address the inequitable distribution of nature-related benefits and burdens felt by some urban communities, but also inspires further exploration into this crucial area of study.

Understanding typhoon-induced vegetation loss and potential ecosystem disservices from land use zonings perspective in high-density Hong Kong

While cities are embracing nature through urban greening and nature conservation, vegetation in typhoon-prone cities is facing stress from intense typhoon disturbances. Limited studies have investigated vegetation loss and its potential ecosystem disservices in the aftermath of typhoons from a land use zoning perspective. Therefore, we (1) compared vegetation losses from three 2023 category 3–4 typhoons in Hong Kong across all land uses in protected and non-protected areas, (2) identified hot spots and cold spots, and (3) weighed the annual average daily traffic and urban volumetric density with vegetation loss rates to generate a Disservice Risk Index for analysis. Results suggest that vegetation loss rate in non-protected areas was higher (7.23%) than in protected areas (1.57%). Within protected areas, country parks had the lowest loss rate (0.11%) and the highest percentage of cold spots (79.4%). In contrast, transportation land use has the highest loss rate of 18.04% and the highest percentage of hot spots (17.9%) within non-protected areas. Ecosystem disservices are potentially more adverse in the city center, which requires immediate preventive measures. This study provides timely urban greening and conservation implications for typhoon-prone cities to allocate vegetation that maximizes ecosystem services while minimizing disservices under frequent typhoon disturbances.

Non-ecological factors affect human interaction with urban nature and perception of cultural ecosystem services

Cultural ecosystem services (CESs) are not only affected by ecological factors, but also by non-ecological factors such as demographic and socio-political factors. Especially for CESs in urban ecosystems, it is necessary to study how the people's perception of CESs change during the changes in social contexts and urban management. The COVID-19 outbreak caused dramatic changes for human society. In this study, we evaluated people's perceptions of CESs provided by an urban park of Shanghai in four phases of the pre-, during and post-COVID period. It is found that aesthetic, historical and recreational values are perceived in the four phases, but the distribution of people's perceptions for CESs varied considerably, influenced by the socio-political contexts. Besides, we emphasized the importance of focusing on the CESs perceived during the prohibited use, as this is a rare period when people were separated from the park and can only perceive CESs indirectly. People's perception of CESs through indirect interactions with ecosystems has received little attention in previous research, but it should be valued by mangers to respond the issues of CESs equity.

How Do Urban Nature Parks Contribute to Psychological Restoration? The Perspective of Embodied Experience

Urban nature parks, as public green spaces in cities, hold great significance in helping individuals rejuvenate their physical and mental well-being in response to the demands of daily life and work. While researchers have widely recognized the psychologically restorative effects of urban nature parks, the role of embodied experiences in the restoration process has not received adequate attention. Drawing upon the embodied theory, this study explores how embodied nature experiences contribute to and support psychological restoration, as well as the underlying psychological mechanisms. The findings indicate that embodied nature experiences in urban nature parks directly and indirectly facilitate psychological restoration by enhancing nature connectedness and social connectedness. Furthermore, nature connectedness and social connectedness serve as serial mediators between embodied nature experiences and psychological restoration. These conclusions provide empirical evidence for the future development of urban nature parks.

Urban sports fields support higher levels of soil butyrate and butyrate-producing bacteria than urban nature parks.

Butyrate-producing bacteria colonise the gut of humans and non-human animals, where they produce butyrate, a short-chain fatty acid with known health benefits. Butyrate-producing bacteria also reside in soils and soil bacteria can drive the assembly of airborne bacterial communities (the aerobiome). Aerobiomes in urban greenspaces are important reservoirs of butyrate-producing bacteria as they supplement the human microbiome, but soil butyrate producer communities have rarely been examined in detail. Here, we studied soil metagenome taxonomic and functional profiles and soil physicochemical data from two urban greenspace types: sports fields (n = 11) and nature parks (n = 22). We also developed a novel method to quantify soil butyrate and characterised the insitu activity of butyrate-producing bacteria. We show that soil butyrate was higher in sports fields than nature parks and that sports fields also had significantly higher relative abundances of the terminal butyrate production genes buk and butCoAT than nature parks. Soil butyrate positively correlated with buk gene abundance (but not butCoAT). Soil moisture (r = .50), calcium (r = -.62), iron (ρ = .54), ammonium nitrogen (ρ = .58) and organic carbon (r = .45) had the strongest soil abiotic effects on soil butyrate concentrations and iron (ρ = .56) and calcium (ρ = -.57) had the strongest soil abiotic effects on buk read abundances. Overall, our findings contribute important new insights into the role of sports fields as key exposure reservoirs of butyrate producing bacteria, with important implications for the provision of microbiome-mediated human health benefits via butyrate.

Ten steps towards integrated decision making for ecological restoration in cities: Rewilding the European beaver (Castor fiber) in Berlin, Germany

Ensuring a livable city for all within the more-than-human discourse, restoration of urban ecosystems requires careful consideration of both human and non-human needs. However, traditional assessments and therefore most management plans usually fail to include the latter as a core planning requirement. This article presents and explains a 10-step method which simultaneously and actively considers both to identify potential restoration areas within urban ecosystems. To do so, a Strengths-Weaknesses-Opportunities-Threats (SWOT) analysis for the multispecies needs identification is combined with a Multicriteria Spatial Decision Support System (MCSDSS) for the spatial assessment. To validate this method, a case study of Berlin, Germany, an explicitly urban case, is presented. The aim of the study was to evaluate the ecosystem restoration (rewilding) potential of the city's riparian and riverine ecosystems through the enhancement of Eurasian beaver habitats.•Method combining SWOT analysis with MCSDSS for an integrated spatial assessment•Well-suited for multispecies (human and non-human) perspective on urban nature restoration

Agglomeration Economies and Rural-to-Urban Migration in India

<p style="text-align:justify"><span style="font-family:Times New Roman,Times,serif"><span style="font-size:16px"><span dir="ltr" lang="EN-US"><span style="color:black">Keeping in view the concept of agglomeration economies and the New Economic Geography (NEG) angle, this paper makes an attempt to examine the rural to urban population movement at the district level in India. The findings do not favour a strong positive association between levels of urbanization and migration rates.  However, there exists a cluster of districts which are able to attract migrants on a large scale in spite of being already urbanized. The work participation rate, share of services and construction work, and literacy rate all form parts of this positive nexus, indicating that opportunities exist with increased levels of urbanization which in turn prompt people to migrate. The positive spill-over effects of higher levels of urbanization are not limited to the urban spaces only as the adjoining rural areas also seem to have undergone   a significant transformation. The land use pattern and activities are changing and some of the developmental impact is evident. However, the regional variations in this respect are evident. There are sharp differences in the relationship between urbanization level and migration rates across regions. The nature of urbanization and its determinants and the outcome variables of urbanization and migration also unravel regional variations. Besides, there are many districts with higher levels of urbanization; yet, they are not able to attract migrants at a rapid pace. New investment opportunities can be created in these spaces to reduce the cost of growth and make employment generation process more effective, facilitating the rural population to take the benefits of agglomeration economies.</span></span></span></span></p>

Urban green spaces of İstanbul: from ‘beautifying’ efforts to ‘mega-projects’

ABSTRACT This study discusses the transformation of urban green spaces in İstanbul, focusing specifically on gardens, groves, parks, and the Northern Forests. Recent research has underscored a significant loss of green space during the 2000s, posing a threat to biodiversity and essential ecosystem services. Despite maintaining a socio-natural continuum, it is evident that the twenty-first century represents a significant departure from the past. This study identifies two pivotal periods: the ‘beautification’ efforts undertaken the young republican period and the ‘mega-projects’ of the 2000s. These periods exhibit both similarities and substantial differences in politics and spatial organization concerning the urbanization of nature. The concept of urban political ecology is incorporated here, which advocates for equal socio-natural solutions and highlights the interconnectedness between urban areas and nature. The study concludes by emphasizing the need to continue examining the winners and losers in transformation of urban green spaces and move beyond project-driven development. It contributes modestly to the growing literature by shedding light on how historically and spatially organized ecologies of urban green spaces in the context of İstanbul can help us understand the socio-spatial changes we are witnessing today, characterized by the extended urbanization of nature worldwide.

Showing and doing: Art & Science collaborations for Environmental sustainability

Art is becoming a new component in engineering and design collaborations to create nature- based solutions for site issues such as pollution control, stormwater runoff and habitat loss. In the last two decades there is a move to combine art with ecology to create a powerful tool for making change in ecological systems, particularly in urban nature. These works are inspired by nature and collaborate effectively with the natural process occurring on the site. Other outcomes of the projects are to increase ecological services on the site, and to involve and educate the human members of communities who live or work near the sites. The human users of the site can see and interact with the site issues while these very issues are being actively solved. Other species can reap the ecological benefits of expanded habitat and rainwater conservation. These projects have the added benefit of giving a visual explanation for the processes at work on the site. Artful Nature Based Solutions bring a new depth of understanding to the site issues because they regard the site through a combined focus of art and science. The essential aspect is the collaboration between artists and scientists. Having both the artist's and scientist's perspectives adds enrichment of ideas and vantage points to the solution. Science and engineering gains from the addition of a visual component as well as an expansion of the concept that art can bring to the issue. Though the projects do not always have quantitative data to back up their ecological effectiveness, the breadth of their communication and sense of making change in a troubled world are of great importance. The paper presents several exemplary cases of the collaboration realized through my work, which addressed stormwater runoff infiltration and water pollution, with implications for NBS.