Urban Ecology Research Articles

Comparative study on remote sensing-based indices for urban ecology assessment: A case study of 12 urban centers in the metropolitan area of eastern India

Comparative study on remote sensing-based indices for urban ecology assessment: A case study of 12 urban centers in the metropolitan area of eastern India

From photo documentation to photo diagrams: a technique to make civic ecologies present and legible

The visualization of nature in cities fundamentally impacts how we imagine the urban environment and our role in caring for it. Across Australia, the project of urban renewal imagines and designs specific typologies of urban nature. These typologies can obscure grass root forms of environmental stewardship and their connection through civic ecologies. Yet, at this time of environmental change, residents’ engagement with urban ecologies is vital. What role might visual communication play in helping to make these civic ecologies initiatives more legible? This article discusses an experiment creating photo diagrams, which expands visual methodologies used in place-based research, such as photo documentation and visual ethnography. Iterative photography augmented by ethnographies enables us to ‘read’ the landscape. Diagrams support us in expanding the photographs in three crucial moves. First, desaturation reveals examples of civic ecologies. Second, tracing exposes the networks and relations that constitute them. And, third, text and lines of flight draw out how civic ecologies extend beyond specific sites and connect to other places. In this way, this article makes three contributions. The first is to experiment with ways to make grass root civic ecologies legible in their complexities to recuperate practices marginalized by top-down socio-ecological processes of urban renewal. The second proposes photo diagrams as a medium moving between photography as descriptive documentation and documentation of non-representational dimensions. Finally, the third brings a visual communication perspective into debates on conveying the non-representational in visual form.

Kosambi Green Lane Park, West Jakarta, Indonesia: Urban Recreation and Ecology Center

This research aims to investigate the concrete impact of the Kosambi Green Lane Park on the ecology and comfort of the surrounding environment. Green lane parks are the main focus for balancing urban growth and environmental preservation in sustainable urban development. Descriptive methods are used to provide an in-depth overview of the park's facilities and level of accessibility and analyze visitors' preferences and needs for existing facilities. The research results show that Kosambi Green Route Park offers a variety of facilities, such as a jogging track, huts, and children's play areas, which are visitors' favorites. This park's access is good via private vehicles and public transportation, with supporting infrastructure that supports visitor comfort. Visitor preferences highlight the need for better care and maintenance of existing facilities and requests for further development, such as the addition of sports facilities and further green areas for picnics. The positive impacts felt by local communities include improved physical and social well-being and contributions to the surrounding environment through improved air quality and environmental awareness. Kosambi Green Lane Park is a successful example of the green lane concept in sustainable urban development. Still, there needs to be continuous attention to maintenance and development so that the benefits can continue to be felt in the long term.

Urban flooding and the resultant pollution: What French-speaking scientists make of it?

Flood damage has increased worldwide in recent decades with a concomitant increased risk of flood-induced pollution. From the perspective of urban political ecology, we ask whether scientists acknowledge flood-induced pollution as a problem and if so how they address it. Using a mixed-methods approach, we analyse 30 semi-structured interviews with researchers in France and Quebec. Our results show that flood pollution can be framed not only in terms of its impact on the environment and our societies, but also as a social representation that varies with the spatial context. The diversity of flood-induced pollution, whether in terms of materiality, visibility, or causation, highlights the undefined contours of flood pollution for the scientific community. We identify obstacles to the emergence of this problem in the scientific arena explained by the structuring of this arena, the vagueness of the term pollution, regulation, and individual and collective approaches to resilience. We argue that these obstacles can be overcome by considering pollution as a social construct and viewing cities in a metabolic framework.

As human societies urbanize, so does ecology; taxonomic, geographic, and other research trends in urban vertebrate ecology.

The threat to biodiversity posed by urban expansion is well researched and supported. Since the late 1990s, the field of urban ecology has been expanding along with the developed landscapes it studies. Past reviews have shown unequal publication rates in urban ecology literature for taxonomic groups and research locations. Herein, we explore differences in the publication rate of urban studies by vertebrate groups, but also expand on previous investigations by broadening the scope of the literature searched, exploring trends in subtopics within the urban wildlife literature, identifying geographic patterns of such publications, and comparing the rate at which non-native and threatened and endangered species are studied in urban settings. We used linear and segmented regression to assess publication rates and Fisher's exact tests for comparisons between groups. All vertebrate groups show an increasing proportion of urban studies through time, with urban avian studies accelerating most sharply and herpetofauna appearing to be understudied. Non-native mammals are more studied than non-native birds, and threatened and endangered herpetofauna and mammals are more likely to be studied than threatened and endangered birds in urban areas. The plurality of urban wildlife studies are found in North America, while there is a dearth of studies from Africa, Asia, and South America. Our results can help inform decisions of urban ecologists on how to better fill in knowledge gaps and bring a greater degree of equity into the field.

Urban Green Space Research Progress and Hotspots Evolution Analysis: Visual Analysis based on WOS

Background and objective: Over the past few decades, urban green space research has emerged as a pivotal field within urban planning, ecology, and environmental science, achieving substantial advancements. This study endeavors to elucidate the trajectory of development and evolving hotspots in urban green space research through a visual analysis of the Web of Science (WOS) database.Methods: This study employs CiteSpace software to visualize the dataset, encompassing the analysis of keywords, abstracts, institutions, authors, references, and more, presenting the knowledge structure graphically. Additionally, it utilizes the LLR tag extraction algorithm to generate a keyword co-occurrence map and conduct clustering and grouping.Results: The findings reveal that the preeminent contributors in urban green space research include Haase, Dagmar, and Nizamani, Mir Muhammad. Furthermore, the collaborative network among researchers underscores the significance of interdisciplinary and cross-border cooperation in advancing urban green space research. Keyword co-occurrence analysis identifies prevalent themes such as land surface temperature and health, highlighting the current focal points of urban green space research.Conclusion: This study discerns heightened attention to topics encompassing the thermal environment, ecosystem services, biodiversity, green space accessibility, and vegetation. These themes mirror societal concerns regarding the influence of urban green spaces on climate change and spatial planning, thereby delineating avenues for future research.

Urban Ecological Quality Assessment Based on Google Earth Engine and Driving Factors Analysis: A Case Study of Wuhan City, China

Ecological quality is a critical factor affecting the livability of urban areas. Remote sensing technology enables the rapid assessment of ecological quality (EQ), providing scientific theoretical support for the maintenance and management of urban ecology. This paper evaluates and analyzes the EQ and its driving factors in the city of Wuhan using remote sensing data from five periods: 2001, 2006, 2011, 2016, and 2021, supported by the Google Earth Engine (GEE) platform. By employing principal component analysis, a Remote Sensing Ecological Index (RSEI) was constructed to assess the spatiotemporal differences of EQ in Wuhan City. Furthermore, the study utilized the optimal parameter-based geographical detector model to analyze the influence of factors such as elevation, slope, aspect, population density, greenness, wetness, dryness, and heat on the RSEI value in 2021 and further explored the impact of changes in precipitation and temperature on the EQ in Wuhan. The results indicate that (1) principal component analysis shows that greenness and wetness positively affect Wuhan’s EQ, while dryness and heat have negative impacts; (2) spatiotemporal analysis reveals that from 2001 to 2021, the EQ in Wuhan showed a trend of initial decline followed by improvement, with the classification grades evolving from poor and average to good and better; (3) the analysis of driving factors shows that all nine indicators have a certain impact on the EQ in Wuhan, with the influence ranking as NDVI > NDBSI > LST > WET > elevation > population density > GDP > slope > aspect; (4) the annual average temperature and precipitation in Wuhan have a non-significant impact on the EQ. The EQ in Wuhan has improved in recent years, but comprehensive management still requires enhancement.

Demarcating the granular frontier: planetary urbanization without an inside

ABSTRACT In its age of global crisis, sand has acquired a conspicuous profile as an urban resource and undercover vector of statecraft. Amidst mounting reports of the disastrous effects of sand mining stoked by intense cycles of urbanization and territorial expansion across the world, it is critical to understand the formation of sand’s granular frontiers, and how their differentiated expression through the global sand crisis demands a reconsideration of the theoretical frontiers of urbanization, territory, and global trade. Building on conceptualisations of sand’s granular geographies and its “geologising” of urban political ecology, this paper seeks to demarcate the theoretical and empirical terrain of sand’s granular frontiers, and how they problematize contemporary debates around urbanization’s “planetary” scope and its extractive underbelly. By reconnecting the frontiers of sand extraction and urbanization, this article theorizes the enclosure of geomorphology and where sand’s satiation of urban and state development is leading. In examining how sand’s simultaneous exclusion from formal processes of valuation and regulation structures urbanization in unpredictable ways, it seeks to provide an account of planetary urbanization without an inside.

The Impact of the Digital Economy on Urban Ecological Resilience: Empirical Evidence from China’s Comprehensive Big Data Pilot Zone Policy

The present study examines the effects of China’s comprehensive big data pilot zone policy on urban ecological resilience. This is achieved through the utilization of a quasi-natural experiment, employing panel data from 217 prefecture-level cities in China spanning the years 2010 to 2021. The research revealed that China’s extensive policy on big data pilot zones has a notable and favorable influence on the ecological resilience of urban areas. This impact is both constant and subject to variation across different regions. The aforementioned impact is attained by means of progressions in industrial structure and the introduction of innovative green technologies. Furthermore, the strategy exerts a beneficial impact on the ecological resilience of urban areas in adjacent regions by means of spatial spillover effects.

Ecology’s inattention to the city: Exploring a regime of scientific imperceptibility

Promoters of urban ecology commonly point to the historical absence of the city in ecology. This assertion is obviously meant to highlight the novelty and timeliness of urban ecology and to plead for its development. Given the founding role of this ignorance narrative for urban ecology, we deemed it essential to explore whether and how it could be empirically substantiated. Drawing on ignorance studies, we propose to investigate knowledge blind spots and questions left uncharted by the dominant research agendas in ecology. Stepping aside from the shared assumptions within the urban ecology community, we set up to explore the main features of a regime of (im)perceptibility of the city in ecology. To this end, and using a mix of methods including bibliometric and textual data analyses, observations and interviews, we combined the exploration of global scientific publications, naturalist inventories in Swiss research institutions and cities and everyday ecological research practices in Switzerland. Our analysis leads to nuancing the binary representation of the city as either absent or present in ecological research. It highlights three dimensions (epistemic framings, field practices and institutional marginality) that may explain the imperceptibility of the city in ecological research. We demonstrate the existence of ecological research in the city before and alongside self-declared ‘urban ecology’. Ignorance studies generally aim to expose biased historiographies and address the politics of contentious knowledge. We hypothesize and show that this analytical framing can also shed light on the obfuscation of past and rival research in the formation and consolidation of epistemic communities.

A transformative shift in urban ecology toward a more active and relevant future for the field and for cities

This paper builds on the expansion of urban ecology from a biologically based discipline—ecology in the city—to an increasingly interdisciplinary field—ecology of the city—to a transdisciplinary, knowledge to action endeavor—an ecology for and with the city. We build on this “prepositional journey” by proposing a transformative shift in urban ecology, and we present a framework for how the field may continue this shift. We conceptualize that urban ecology is in a state of flux, and that this shift is needed to transform urban ecology into a more engaged and action based field, and one that includes a diversity of actors willing to participate in the future of their cities. In this transformative shift, these actors will engage, collaborate, and participate in a continuous spiral of knowledge → action → knowledge spiral and back to knowledge loop, with the goal of co producing sustainable and resilient solutions to myriad urban challenges. Our framework for this transformative shift includes three pathways: (1) a repeating knowledge → action → knowledge spiral of ideas, information, and solutions produced by a diverse community of agents of urban change working together in an “urban sandbox”; (2) incorporation of a social–ecological–technological systems framework in this spiral and expanding the spiral temporally to include the “deep future,” where future scenarios are based on a visioning of seemingly unimaginable or plausible future states of cities that are sustainable and resilient; and (3) the expansion of the spiral in space, to include rural areas and places that are not yet cities. The three interrelated pathways that define the transformative shift demonstrate the power of an urban ecology that has moved beyond urban systems science and into a realm where collaborations among diverse knowledges and voices are working together to understand cities and what is urban while producing sustainable solutions to contemporary challenges and envisioning futures of socially, ecologically, and technologically resilient cities. We present case study examples of each of the three pathways that make up this transformative shift in urban ecology and discuss both limitations and opportunities for future research and action with this transdisciplinary broadening of the field.

Shifting forward: Urban ecology in perspective

The world has become urban; cities increasingly shape our worldviews, relation to other species, and the large-scale, long-term decisions we make. Cities are nature, but they need to align better with other ecosystems to avoid accelerating climate change and loss of biodiversity. We need a science to guide urban development across the diverse realities of global cities. This need can be met, in part, by shifts in urban ecology and its linkages to related sciences. This perspective is a “synthesis of syntheses”, consolidating ideas from the other articles in the Special Section. It re-examines the role of urban ecology, and explores its integration with other disciplines that study cities. We conclude by summarizing the next steps in the ongoing shift in urban ecology, which is fast becoming an integral part of urban studies.

The relational shift in urban ecology: From place and structures to multiple modes of coproduction for positive urban futures.

This perspective emerged from ongoing dialogue among ecologists initiated by a virtual workshop in 2021. A transdisciplinary group of researchers and practitioners conclude that urban ecology as a science can better contribute to positive futures by focusing on relationships, rather than prioritizing urban structures. Insights from other relational disciplines, such as political ecology, governance, urban design, and conservation also contribute. Relationality is especially powerful given the need to rapidly adapt to the changing social and biophysical drivers of global urban systems. These unprecedented dynamics are better understood through a relational lens than traditional structural questions. We use three kinds of coproduction-of the social-ecological world, of science, and of actionable knowledge-to identify key processes of coproduction within urban places. Connectivity is crucial to relational urban ecology. Eight themes emerge from the joint explorations of the paper andpoint toward social action for improving life and environment in urban futures.

Forging just ecologies: 25 years of urban long-term ecological research collaboration

We ask how environmental justice and urban ecology have influenced one another over the past 25 years in the context of the US Long-Term Ecological Research (LTER) program and Baltimore Ecosystem Study (BES) project. BES began after environmental justice emerged through activism and scholarship in the 1980s but spans a period of increasing awareness among ecologists and environmental practitioners. The work in Baltimore provides a detailed example of how ecological research has been affected by a growing understanding of environmental justice. The shift shows how unjust environmental outcomes emerge and are reinforced over time by systemic discrimination and exclusion. We do not comprehensively review the literature on environmental justice in urban ecology but do present four brief cases from the Caribbean, Africa, and Asia, to illustrate the global relevance of the topic. The example cases demonstrate the necessity for continuous engagement with communities in addressing environmental problem solving.

From urban ecology to urban enquiry: How to build cumulative and context-sensitive understandings

This paper positions urban ecology as increasingly conversant with multiple perspectives and methods for understanding the functions and qualities of diverse cities and urban situations. Despite progress in the field, we need clear pathways for positioning, connecting and synthesising specific knowledge and to make it speak to more systemic questions about cities and the life within them. These pathways need to be able to make use of diverse sources of information to better account for the diverse relations between people, other species and the ecological, social, cultural, economic, technical and increasingly digital structures that they are embedded in. Grounded in a description of the systemic knowledge needed, we propose five complementary and often connected approaches for building cumulative systemic understandings, and a framework for connecting and combining different methods and evidence. The approaches and the framework help position urban ecology and other fields of study as entry points to further advance interdisciplinary synthesis and open up new fields of research.

Ecological city concept: Challenge and future research agenda in urban ecology perspective

Cities are no longer viewed as creatures with a linear-climax-established cycle but as ecosystems with dynamic and complicated processes, with people as the primary component. Thus, we must understand urban ecology’s structure and function to create urban planning and appreciate the mechanisms, dynamics, and evolution that connect human and ecological processes. The ecological city (ecocity) is one of the city conceptions that has evolved with the perspective of urban ecology history. The concept of ecocity development within urban ecology systems pertains to recognizing cities as complex ecosystems primarily influenced by human activities. In this context, individuals actively engage in dynamic problem-solving approaches to address environmental challenges to ensure a sustainable and satisfactory quality of life for future generations. Therefore, it is necessary to study how ecocity has developed since it was initiated today and how it relates to the urban ecology perspective. This study aims to investigate the progression of scholarly publications on ecocity research from 1980 to 2023. Additionally, it intends to ascertain the trajectory of ecological city research trends, establish connections between scientific concepts, and construct an ecological city science network using keyword co-occurrence analysis from the urban ecology perspective. The present study used a descriptive bibliometric analysis and literature review methodology. The data was obtained by utilizing the Lens.org database, was conducted using the VOS (Visualization of Similarities) viewer software for data analysis. The urban ecology research area ecology of cities can be studied further from density visualization of ecosystem services and life cycle assessment. Finally, the challenges and future agenda of ecocity research include addressing humans by modeling functions or processes that connect humans with ecosystems (ecology of cities), urban design, ecological imperatives, integration research, and improving the contribution to environmental goals, spatial distribution, agriculture, natural resources, policy, economic development, and public health.

Microclimate, an important part of ecology and biogeography

AbstractBrief introduction: What are microclimates and why are they important?Microclimate science has developed into a global discipline. Microclimate science is increasingly used to understand and mitigate climate and biodiversity shifts. Here, we provide an overview of the current status of microclimate ecology and biogeography in terrestrial ecosystems, and where this field is heading next.Microclimate investigations in ecology and biogeographyWe highlight the latest research on interactions between microclimates and organisms, including how microclimates influence individuals, and through them populations, communities and entire ecosystems and their processes. We also briefly discuss recent research on how organisms shape microclimates from the tropics to the poles.Microclimate applications in ecosystem managementMicroclimates are also important in ecosystem management under climate change. We showcase new research in microclimate management with examples from biodiversity conservation, forestry and urban ecology. We discuss the importance of microrefugia in conservation and how to promote microclimate heterogeneity.Methods for microclimate scienceWe showcase the recent advances in data acquisition, such as novel field sensors and remote sensing methods. We discuss microclimate modelling, mapping and data processing, including accessibility of modelling tools, advantages of mechanistic and statistical modelling and solutions for computational challenges that have pushed the state‐of‐the‐art of the field.What's next?We identify major knowledge gaps that need to be filled for further advancing microclimate investigations, applications and methods. These gaps include spatiotemporal scaling of microclimate data, mismatches between macroclimate and microclimate in predicting responses of organisms to climate change, and the need for more evidence on the outcomes of microclimate management.

The Impact of Official Promotion Incentives on Urban Ecological Welfare Performance and Its Spatial Effect

Economic growth, environmental protection, and welfare improvement are closely related to local officials. Therefore, exploring the paths that affect ecological welfare performance (EWP) from the perspective of official promotion incentives has certain practical significance. EWP is an indicator that measures the welfare relationship between ecological resource inputs and outputs, reflecting the sustainable development status of a region. First, considering the background of the dual carbon goals, the EWPs of 284 cities from 2007 to 2020 were measured by constructing an indicator system and using the super-SBM-DEA method. Second, by constructing a theoretical framework of “official promotion incentives-fiscal responsiveness-EWP”, we empirically tested the impact and mechanism of official promotion incentives on urban EWP; finally, based on regional and official age heterogeneity, we explored the differential impacts of official promotion incentives on urban EWPs. The results show that official promotion incentives inhibit the improvement of urban EWP by reducing financial responsiveness; in terms of spatial spillovers, under three types of spatial weight matrices, promotion incentives for officials in neighboring areas can significantly improve the EWPs of local cities. From the perspective of regional differences, official promotion incentives in the eastern region significantly improved urban EWP, official promotion incentives in the western and northeastern regions significantly inhibited urban EWP, and official promotion incentives in the central region had no significant impact on urban EWP. From the perspective of official age, local officials aged 53 and 54 intensified the inhibitory effect of promotion incentives on urban EWP. By constructing a theoretical framework and empirical testing, this paper provides theoretical support and empirical evidence for the impact of official promotion incentives on urban EWP. The results help to understand the relationship between official promotion incentives and sustainable development, and promotes sustainable urban development.

A matter of connection: the importance of habitat networks for endangered butterflies in anthropogenic landscapes

Cities are expanding at fast rates across the world, representing one of the main drivers of biodiversity loss due to habitat replacement. Nonetheless, urban and peri-urban areas often feature green spaces that may offer opportunities to wildlife and even represent safe havens for endangered species. Nonetheless, the key drivers that shape wildlife responses to urban landscapes, and in turn their ability to persist within cities, are far from being fully understood. Here we focus on an ecologically specialized butterfly, the endemic Italian festoon Zerynthia cassandra, as a model to assess how endangered species may survive in highly modified urban landscapes. The relatively low mobility and high host plant specialization make Z. cassandra an excellent target for studies in urban ecology, as they make the species able to exploit small suitable patches while at the same time potentially sensitive to habitat fragmentation and loss due to urbanization and land reclamation. We thus first document the relatively widespread occurrence of potentially suitable sites within two highly modified landscapes of central and southern Italy, with 25 and 35% of sites actually occupied by Z. cassandra. By modeling the probability of butterfly occurrence as a function of environmental characteristics, we found that Z. cassandra is strongly influenced by functional connectivity among suitable sites in urban landscapes, as well as by the abundance of Aristolochia host plants, and by the availability of profitable land cover classes in the immediate surroundings of potential oviposition sites. Our results indicate not only that networks of urban and peri-urban green spaces may host populations of protected and endangered species, but that management should also focus on the urban matrix in order to provide connecting corridors, as key assets to guarantee species persistence in cities.

Improving Population Health and Health Equity: The Potential of Transitioning Public Open Spaces to Optimise the Production of Urban Ecological Services in Adelaide, South Australia

ABSTRACT This research examines the potential of transitioning public “green spaces” to optimise health benefiting urban ecological services in metropolitan Adelaide, South Australia. The research found strengths but also significant weaknesses. The major weaknesses observed were poor quality amenities and facilities within open spaces, low landscape complexity, poor maintenance and inadequate integration with the built form and pedestrian networks of the surrounding neighbourhoods. Previous research has shown that the weaknesses we observed are adversely affecting the health and wellbeing of many residents. In addition, our research shows there are far more strengths and fewer weaknesses in pre-1945 and high-income neighbourhoods.