Dr. rer. nat. Thilo Wellmann
Profil
Forschungsthemen1
StadtLandschaften - resiliente Stadtlandschaften im globalen Wandel
Quelle ↗Förderer: Bundesministerium für Forschung, Technologie und Raumfahrt Zeitraum: 11/2025 - 10/2030 Projektleitung: Dr. rer. nat. Thilo Wellmann
Mögliche Industrie-Partner10
Stand: 26.4.2026, 19:48:44 (Top-K=20, Min-Cosine=0.4)
- 22 Treffer59.3%
- EU: CLEARING HOUSE – Collaborative Learning in Research, Information-Sharing and Governance on How Urban Forest-Based Solutions Support Sino-European Urban FuturesP59.3%
- EU: CLEARING HOUSE – Collaborative Learning in Research, Information-Sharing and Governance on How Urban Forest-Based Solutions Support Sino-European Urban Futures
Centro de Investigacion Ecologica Y Aplicaciones Forestales Consorcio
P23 Treffer59.3%- EU: CLEARING HOUSE – Collaborative Learning in Research, Information-Sharing and Governance on How Urban Forest-Based Solutions Support Sino-European Urban FuturesP59.3%
- EU: CLEARING HOUSE – Collaborative Learning in Research, Information-Sharing and Governance on How Urban Forest-Based Solutions Support Sino-European Urban Futures
- EU: CLEARING HOUSE – Collaborative Learning in Research, Information-Sharing and Governance on How Urban Forest-Based Solutions Support Sino-European Urban FuturesP59.3%
- EU: CLEARING HOUSE – Collaborative Learning in Research, Information-Sharing and Governance on How Urban Forest-Based Solutions Support Sino-European Urban Futures
- 12 Treffer59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in EuropeP59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in Europe
- 12 Treffer59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in EuropeP59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in Europe
- 12 Treffer59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in EuropeP59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in Europe
- 13 Treffer59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in EuropeP59.2%
- Validating C. Elegans Healthspan Model for Better Understanding Factors Causing Health and Disease, to Develop Evidence Based Prevention, Diagnostic, Therapeutic and Other StrategiesP49.0%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in Europe
- 9 Treffer59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in EuropeP59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in Europe
- 12 Treffer59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in EuropeP59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in Europe
- 8 Treffer59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in EuropeP59.2%
- Climate-smart rewilding: ecological restoration for climate change mitigation, adaptation and biodiversity support in Europe
Publikationen25
Top 25 nach Zitationen — Quelle: OpenAlex (BAAI/bge-m3 embedded für Matching).
Remote Sensing · 265 Zitationen · DOI
The status, changes, and disturbances in geomorphological regimes can be regarded as controlling and regulating factors for biodiversity. Therefore, monitoring geomorphology at local, regional, and global scales is not only necessary to conserve geodiversity, but also to preserve biodiversity, as well as to improve biodiversity conservation and ecosystem management. Numerous remote sensing (RS) approaches and platforms have been used in the past to enable a cost-effective, increasingly freely available, comprehensive, repetitive, standardized, and objective monitoring of geomorphological characteristics and their traits. This contribution provides a state-of-the-art review for the RS-based monitoring of these characteristics and traits, by presenting examples of aeolian, fluvial, and coastal landforms. Different examples for monitoring geomorphology as a crucial discipline of geodiversity using RS are provided, discussing the implementation of RS technologies such as LiDAR, RADAR, as well as multi-spectral and hyperspectral sensor technologies. Furthermore, data products and RS technologies that could be used in the future for monitoring geomorphology are introduced. The use of spectral traits (ST) and spectral trait variation (STV) approaches with RS enable the status, changes, and disturbances of geomorphic diversity to be monitored. We focus on the requirements for future geomorphology monitoring specifically aimed at overcoming some key limitations of ecological modeling, namely: the implementation and linking of in-situ, close-range, air- and spaceborne RS technologies, geomorphic traits, and data science approaches as crucial components for a better understanding of the geomorphic impacts on complex ecosystems. This paper aims to impart multidimensional geomorphic information obtained by RS for improved utilization in biodiversity monitoring.
Landscape and Urban Planning · 246 Zitationen · DOI
Remote sensing has evolved to become a key tool for various fields of environmental analysis, thus actively informing policy across areas and domains. To evaluate the degree to which remote sensing is contributing to the science of ecologically-oriented urban planning, we carried out a systematic literature review using the SCOPUS database, searching for articles integrating knowledge in urban planning, remote sensing and ecology. We reviewed 186 articles, analysing various issues in urban environments worldwide. Key findings include that the level of integration between the three disciplines is limited, with only 12% of the papers fully integrating ecology, remote sensing and planning while 24% of the studies use specific methods from one domain only. The vast majority of studies is oriented towards contributing to the knowledge base or monitoring the impacts of existing policies. Few studies are directly policy relevant by either contributing to direct issues in planning and making specific design suggestions or evaluations. The accessibility of the scientific findings remains limited, as the majority of journal articles are not open access and proprietary software and data are frequently used. To overcome these issues, we suggest three future avenues for science as well as three potential entry points for remote sensing into applied urban planning. By doing so, remote sensing data could become a vital tool actively contributing to policies, civil engagement and concrete planning measures by providing independent and cost effective environmental analyses.
Ecological Indicators · 85 Zitationen · DOI
Landscape and Urban Planning · 75 Zitationen · DOI
npj Urban Sustainability · 70 Zitationen · DOI
Abstract To ensure that cities and urban ecosystems support human wellbeing and overall quality of life we need conceptual frameworks that can connect different scientific disciplines as well as research and practice. In this perspective, we explore the potential of a traits framework for understanding social-ecological patterns, dynamics, interactions, and tipping points in complex urban systems. To do so, we discuss what kind of framing, and what research, that would allow traits to (1) link the sensitivity of a given environmental entity to different globally relevant pressures, such as land conversion or climate change to its social-ecological consequences; (2) connect to human appraisal and diverse bio-cultural sense-making through the different cues and characteristics people use to detect change or articulate value narratives, and (3) examine how and under what conditions this new approach may trigger, inform, and support decision making in land/resources management at different scales.
AMBIO · 45 Zitationen · DOI
While held to be a means for climate change adaptation and mitigation, nature-based solutions (NbS) themselves are vulnerable to climate change. To find ways of compensating for this vulnerability we combine a focused literature review on how information technology has been used to strengthen positive social-ecological-technological feedback, with the development of a prototype decision-support tool. Guided by the literature review, the tool integrates recent advances in using globally available remote sensing data to elicit information on functional diversity and ecosystem service provisioning with information on human service demand and population vulnerability. When combined, these variables can inform climate change adaptation strategies grounded in local social-ecological realities. This type of integrated monitoring and packaging information to be actionable have potential to support NbS management and local knowledge building for context-tailored solutions to societal challenges in urban environments.
Landscape Ecology · 44 Zitationen · DOI
Abstract Context Urban densification has been argued to increase the contrast between built up and open green space. This contrast may offer a starting point for assessing the extent and magnitude of the positive influences urban green infrastructure is expected to have on its surroundings. Objectives Drawing on insights from landscape ecology and urban geography, this exploratory study investigates how the combined properties of green and grey urban infrastructures determine the influence of urban green infrastructure on the overall quality of the urban landscape. Methods This article uses distance rise-or-decay functions to describe how receptive different land uses are to the influence of neighbouring green spaces, and does this based on integrated information on urban morphology, land surface temperature and habitat use by breeding birds. Results Our results show how green space has a non-linear and declining cooling influence on adjacent urban land uses, extending up to 300–400 m in densely built up areas and up to 500 m in low density areas. Further, we found a statistically significant declining impact of green space on bird species richness up to 500 m outside its boundaries. Conclusions Our focus on land use combinations and interrelations paves the way for a number of new joint landscape level assessments of direct and indirect accessibility to different ecosystem services. Our early results reinforce the challenging need to retain more green space in densely built up part of cities.
Remote Sensing · 26 Zitationen · DOI
Remote sensing (RS) enables a cost-effective, extensive, continuous and standardized monitoring of traits and trait variations of geomorphology and its processes, from the local to the continental scale. To implement and better understand RS techniques and the spectral indicators derived from them in the monitoring of geomorphology, this paper presents a new perspective for the definition and recording of five characteristics of geomorphodiversity with RS, namely: geomorphic genesis diversity, geomorphic trait diversity, geomorphic structural diversity, geomorphic taxonomic diversity, and geomorphic functional diversity. In this respect, geomorphic trait diversity is the cornerstone and is essential for recording the other four characteristics using RS technologies. All five characteristics are discussed in detail in this paper and reinforced with numerous examples from various RS technologies. Methods for classifying the five characteristics of geomorphodiversity using RS, as well as the constraints of monitoring the diversity of geomorphology using RS, are discussed. RS-aided techniques that can be used for monitoring geomorphodiversity in regimes with changing land-use intensity are presented. Further, new approaches of geomorphic traits that enable the monitoring of geomorphodiversity through the valorisation of RS data from multiple missions are discussed as well as the ecosystem integrity approach. Likewise, the approach of monitoring the five characteristics of geomorphodiversity recording with RS is discussed, as are existing approaches for recording spectral geomorhic traits/ trait variation approach and indicators, along with approaches for assessing geomorphodiversity. It is shown that there is no comparable approach with which to define and record the five characteristics of geomorphodiversity using only RS data in the literature. Finally, the importance of the digitization process and the use of data science for research in the field of geomorphology in the 21st century is elucidated and discussed.
The Science of The Total Environment · 25 Zitationen · DOI
Urban green space (UGS) is a complex and highly dynamic interface between people and nature. The existing methods of quantifying and evaluating UGS are mainly implemented on the surface features at a landscape scale, and most of them are insufficient to thoroughly reflect the spatial-temporal relationships, especially the internal characteristics changes at a small scale and the neighborhood spatial relationship of UGS. This paper thus proposes a method to evaluate the internal dynamics and neighborhood heterogeneity of different types of UGS in Leipzig using the gray level co-occurrence matrix (GLCM) index. We choose GLCM variance, contrast, and entropy to analyze five main types of UGS through a holistic description of their vegetation growth, spatial heterogeneity, and internal orderliness. The results show that different types of UGS have distinct characteristics due to the changes of surrounding buildings and the distance to the built-up area. Within a one-year period, seasonal changes in UGS far away from built-up areas are more obvious. As for the larger and dense urban forests, they have the lowest spatial heterogeneity and internal order. On the contrary, the garden areas present the highest heterogeneity. In this study, the GLCM index depicts the seasonal alternation of UGS on the temporal scale and shows the spatial form of each UGS, being in line with local urban planning contexts. The correlation analysis of indices also proves that each type of UGS has its distinct temporal and spatial characteristics. The GLCM is valid in assessing the internal characteristics and relationships of various UGS at the neighborhood scales, and using the methodology developed in our study, more studies and field experiments could be fulfilled to investigate the assessment accuracy of our GLCM index approach and to further enhance the scientific understanding on the internal features and ecological functions of UGS.
Land · 25 Zitationen · DOI
Urban green space (UGS) has gained much attention in terms of urban ecosystems and human health. Measures to improve green space in compact cities are important for urban sustainability. However, there is a knowledge gap between UGS improvement and planning management. Based on the integration of quantity and quality, this research aims to identify UGS changes during urban development and suggest ways to improve green space. We analyse land use changes, conduct a hotspot analysis of land surface temperature (LST) between 2005 and 2015 at the city scale, and examine the changes in small, medium and large patches at the neighbourhood scale to guide decision-makers in UGS management. The results show that (i) the redevelopment of urban brownfields is an effective method for increasing quantity, with differences depending on regional functions; (ii) small, medium and large patches of green space have significance in terms of improving the quality of temperature mitigation, with apparent coldspot clustering from 2005 to 2015; and (iii) the integration of UGS quality and quantity in planning management is beneficial to green space sustainability. Green space improvement needs to emphasize the integration of UGS quantity and quality to accommodate targeted planning for local conditions.
Ecological Indicators · 24 Zitationen · DOI
Ecological Informatics · 19 Zitationen · DOI
Healthy street trees provide important ecosystem services to cities, but are under increasing stress from urbanisation and climate change, including drought. Traditional field observations are limited in their ability to provide city-wide and regular monitoring of the drought response of street trees, which is essential for their effective management. To overcome this, we propose a novel workflow using freely available remote sensing imagery from Sentinel-2 to identify temporal and species-specific drought response patterns of street trees. We evaluate the workflow on a sample of 2514 mature street trees of the seven most common street tree species in Leipzig, Germany. For each tree, we generate time series of eight vegetation indices from 2017 to 2022, namely enhanced vegetation index (EVI), normalised burn ratio (NBR) and normalised difference vegetation index (NDVI), each using the 10 m and 20 m resolution near-infrared band (EVI-10, EVI-20, NBR-10, NBR-20, NDVI-10, NDVI-20), as well as red edge normalised difference vegetation index (RENDVI) and red-green vegetation index (RGVI). They form the basis for a correlation analysis using the meteorological drought indicator standardised precipitation evapotranspiration index (SPEI) and annual growing season integrals, which we subtract from those of the base year 2017. We use boxplots and statistical hypothesis testing to examine differences between and within tree species and years. The results show positive relationships between the eight vegetation indices and the SPEI. The NBR-20 shows the highest correlation coefficients. We also find significant differences in the drought response of several tree species, with Quercus robur being the most drought responsive and Platanus x acerifolia being the least. While most tree species have significantly smaller growing season integrals in the drought years 2018 and 2020 than in the non-drought years 2017 and 2021, the effects are not as pronounced in the drought years 2019 and 2022. Uncertainties arise, for example, from spectral signal variations caused by adjacent land use. Nevertheless, the proposed workflow holds promise for incorporation into holistic urban green management solutions and mixed-method approaches for further research into the causes and consequences of drought-induced damage to street trees.
Urban forestry & urban greening · 19 Zitationen · DOI
Urban forests as nature-based solutions (UF-NBS) are important tools for climate change adaptation and sustainable development. However, achieving both effective and sustainable UF-NBS solutions requires diverse knowledge. This includes knowledge on UF-NBS implementation, on the assessment of their environmental impacts in diverse spatial contexts, and on their management for the long-term safeguarding of delivered benefits. A successful integration of such bodies of knowledge demands a systematic understanding of UF-NBS. To achieve such an understanding, this paper presents a conceptual UF-NBS model obtained through a semantic, trait-based modelling approach. This conceptual model is subsequently implemented as an extendible, re-usable and interoperable ontology. In so doing, a formal, trait-based vocabulary on UF-NBS is created, that allows expressing spatial, morphological, physical, functional, and institutional UF-NBS properties for their typification and a subsequent integration of further knowledge and data. Thereby, ways forward are opened for a more systematic UF-NBS impact assessment, management, and decision-making.
Natural hazards and earth system sciences · 15 Zitationen · DOI
Abstract. The most common approach to assessing natural hazard risk is investigating the willingness to pay in the presence or absence of such risk. In this work, we propose a new, machine-learning-based, indirect approach to the problem, i.e. through residential-choice modelling. Especially in urban environments, exposure and vulnerability are highly dynamic risk components, both being shaped by a complex and continuous reorganization and redistribution of assets within the urban space, including the (re-)location of urban dwellers. By modelling residential-choice behaviour in the city of Leipzig, Germany, we seek to examine how exposure and vulnerabilities are shaped by the residential-location-choice process. The proposed approach reveals hot spots and cold spots of residential choice for distinct socioeconomic groups exhibiting heterogeneous preferences. We discuss the relationship between observed patterns and disaster risk through the lens of exposure and vulnerability, as well as links to urban planning, and explore how the proposed methodology may contribute to predicting future trends in exposure, vulnerability, and risk through this analytical focus. Avenues for future research include the operational strengthening of these linkages for more effective disaster risk management.
Remote Sensing · 10 Zitationen · DOI
One of the greatest challenges of our time is monitoring the rapid environmental changes taking place worldwide at both local and global scales. This requires easy-to-use and ready-to-implement tools and services to monitor and quantify aspects of bio- and geodiversity change and the impact of land use intensification using freely available and global remotely sensed data, and to derive remotely sensed indicators. Currently, there are no services for quantifying both raster- and vector-based indicators in a “compact tool”. Therefore, the main innovation of ESIS/Imalys is having a remote sensing (RS) tool that allows for RS data processing, data management, and continuous and discrete quantification and derivation of RS indicators in one tool. With the ESIS/Imalys project (Ecosystem Integrity Remote Sensing—Modelling and Service Tool), we try to present environmental indicators on a clearly defined and reproducible basis. The Imalys software library generates the RS indicators and remote sensing products defined for ESIS. This paper provides an overview of the functionality of the Imalys software library. An overview of the technical background of the implementation of the Imalys library, data formats and the user interfaces is given. Examples of RS-based indicators derived using the Imalys tool at pixel level and at zone level (vector level) are presented. Furthermore, the advantages and disadvantages of the Imalys tool are discussed in detail in order to better assess the value of Imalys for users and developers. The applicability of the indicators will be demonstrated through three ecological applications, namely: (1) monitoring landscape diversity, (2) monitoring landscape structure and landscape fragmentation, and (3) monitoring land use intensity and its impact on ecosystem functions. Despite the integration of large amounts of data, Imalys can run on any PC, as the processing and derivation of indicators has been greatly optimised. The Imalys source code is freely available and is hosted and maintained under an open source license. Complete documentation of all methods, functions and derived indicators can be found in the freely available Imalys manual. The user-friendliness of Imalys, despite the integration of a large amount of RS data, makes it another important tool for ecological research, modelling and application for the monitoring and derivation of ecosystem indicators from local to global scale.
Basic and Applied Ecology · 9 Zitationen · DOI
Future cities have the potential to be biodiverse areas in which humans and wildlife can coexist. However, the success of creating or maintaining wildlife-inclusive future cities can be challenged by management actions that are solely based on ecological research, while overlooking research on human perspectives. Despite the growth of literature on human-wildlife interactions, which complements the breadth of urban ecology research, the overlap between these two research areas is still uncommon. In this study, we reviewed the literature of wild mammals in urban areas to identify patterns and gaps in the literature. We found 848 published journal articles, of which 480 articles focused on wildlife ecology, 269 articles focused on human dimensions and 99 articles had interdisciplinary combinations of both. Ecology-centered publications tended to be about habitat, rather than behavior, diet, health, reproduction and interspecies-relations, and literature of human dimensions was more evenly divided into management, perception, conflict and coexistence. Most ecology studies reported on specific taxonomic families, mainly canids and murids, but in human-dimension studies, “wildlife” was considered more as a general community of species. The most studied interdisciplinary combination of research themes was wildlife habitat and human-wildlife-conflicts (n = 22), while only nine studies incorporated perception with ecological research. Even though studies on human dimensions of wildlife in cities are increasing, interdisciplinary research is lacking, which limits the knowledge on how to manage and shape urban areas to achieve coexistence of humans and wild mammals. For future cities to successfully become biophilic and support human-wildlife coexistence, we outlined five key elements for a research agenda: 1) Investigate urban mammal research through an interdisciplinary lens; 2) Explore ecological dynamics beyond habitat selection; 3) Conduct research for coexistence; 4) Disentangle what is “urban wildlife”; 5) Study a diverse array of urban wild mammals.
Land · 9 Zitationen · DOI
Urbanization rate in Central America is the second fastest worldwide and its major cities face challenges regarding urban sustainability. Urban Green Fabric (UGF) is an important material condition for the urban quality of life and, therefore, key to planning processes. We performed an analysis of the UGF of Guatemala City including the identification and classification of UGF, their spatial pattern analysis, construction of ensembles of districts (zones) and revealing citizen’s interactions with UGF. We used remote sensing and land use mapping techniques, spatial metrics and a questionnaire survey. Main results are the UGF map of Guatemala City and six ensembles of zones based on a set of indicators. We further revealed citizens’ recognition of green spaces, their perceptions about green space amount and availability as well as their support for UGF future interventions. Finally, we discuss the implications for planning promoted by our results and suggest three actions for UGF sustainability: Creation of new green spaces, protecting existing green spaces and enhancing the mosaic with different green spaces types. UGF is an essential decision support tool for a diversity of actors.
MethodsX · 5 Zitationen · DOI
The COVID-19 pandemic has shown that an immediate access to relevant information is key for timely interventions and forming of public opinion and discourse. In this regard, dashboards present themselves as invaluable tools for the democratization of data and for the creation of accessible evidence bases. Building on this momentum, it is proposed to integrate interactive means such as dashboards into academic literature review synthesis, in order to support the summarization, narration, and dissemination of findings, and furthermore, to increase transparency and support the transferability and comparability of findings. Exemplified for a systematic literature review on urban forests as nature-based solutions,•Key functionalities, requirements and design considerations for the development of dashboards for use in academic literature reviews synthesis are identified.•An application architecture that embeds dashboard development into an R workflow is presented, with emphasis on the steps needed to transform the data collected during the review process into a structured form.•Technical and methodological means for the actual dashboard implementation are highlighted, considering the identified key functionalities and requirements.
Edward Elgar Publishing eBooks · 4 Zitationen · DOI
If nature-based solutions that depend on ecosystem structure and functioning are going to be reliably and sustainably provided over time, then urban ecosystems themselves must be resilient to interacting local and regional disturbances and extremes. Here, we provide an urban ecological resilience (UER) conceptual framework for urban social-ecological-technological systems that relies on species diversity, abundance, and trait data to support emerging urban ecology research, provide a methodological approach for assessment, and guide planning and management for urban ecological resilience. We discuss the need for urban ecological resilience assessment, the role of species traits, and the UER conceptual framework, and provide a case study for how the framework can be operationalized using available local species and trait data. We analyzed street trees in New York City to demonstrate a methodological approach for assessing their potential resilience to climate-induced stressors including urban heat, drought, and storms.
Basic and Applied Ecology · 3 Zitationen · DOI
The Convention on Biological Diversity aims to protect 30% of the Earth’s land and marine surface to promote biodiversity. In the European Union, conservation areas are mainly placed under protection through the Habitats Directive. These so-called Natura 2000 sites currently cover 18.6% of Europe's land area. Obligatory status reports enable a broad-scale analysis of conservation states to investigate if biodiversity is in the favourable conservation status demanded by the directive and which factors may be inhibiting. With focus on Germany, we evaluated the conservation states of habitat types and species groups as assessed in standard data forms and related it to drivers commonly reported for the sites, e.g., land-use practices, protected area size and time since designation. Our results are based on assessments from 23% (1,049) of Germany’s Natura 2000 sites protected under the Habitats Directive and show that only 6% of habitats’ and 4% of species’ assessments report a favourable conservation status. A review of the reported drivers showed that most negative influences on Natura 2000 sites were attributed to agricultural and forestry activities, as well as natural system modifications, while for both land-use types also practices with positive impact were listed. For habitats, conservation status was better in Natura 2000 sites that were established earlier than later. For both habitats and species, more favourable conservation states were overall related to larger area sizes and the absence of direct land use (agriculture, forestry). Our results highlight that a high proportion of protected areas alone does not suffice to infer successes for biodiversity conservation when land-use activities continue to affect target species or their habitats. Increased conversation efforts for Natura 2000 areas will be required to meet the goals of the recently implemented EU Nature Restoration Law.
Land · 3 Zitationen · DOI
Urban nature reserves in Poland are precious relics of ancient nature with preserved biodiversity. They consist of valuable trees several 100 years old, are biodiverse, and are valuable recreational spaces right in and around cities. It is therefore critical to manage tradeoffs between visitor safety due to, e.g., falling dead branches and the need for old-grown trees for biodiversity conservation. This study aimed to determine whether airborne laser scanning data (LiDAR) can confirm that trees exhibiting the worst crown defoliation are the first to be damaged in storms. Our results show that during Storm Eunice in 2022, the detected defoliated trees, in fact, were damaged the most. Despite such evidence available to the city, no targeted changes to the management of the reserves were taken after the storm. One of the forests was completely closed to visitors; in the other forest, areas with damaged trees were fenced off, and then, the remaining branches and fallen trees were removed to make the forest available for recreation. Using available evidence such as LiDAR data, we propose more targeted and nuanced forms of managing biodiversity conservation in conjunction with visitor safety. This includes the establishment of priority areas, visitor information, and visitor management. This way, airborne laser scanning and Geographic Information Systems can be used to balance management needs accounting for both biodiverse old-grown forest structures while at the same time providing added safety for visitors.
3 Zitationen · DOI
Abstract. Disaster risk is conceived as the interaction of hazard, exposure, and vulnerability. Especially in urban environments, exposure and vulnerability are highly dynamic risk components, both being shaped by a complex and continuous reorganization and redistribution of assets within the urban space, including the residence of urban dwellers. This case study for the city of Leipzig, Germany, proposes an indirect, machine learning-based approach for the prediction of residential choice behaviour to explore how exposure and vulnerabilities are shaped by the residential location choice process. The proposed approach reveals hot spots and cold spots of residential choice for distinct socioeconomic groups exhibiting heterogeneous preferences. We discuss the relationship between observed patterns and disaster risk through the lens of exposure and vulnerability, as well as links to urban planning. Avenues for future research include the operational strengthening of these linkages for more effective disaster risk management.
Zenodo (CERN European Organization for Nuclear Research) · 2 Zitationen · DOI
Urban green space (UGS) has gained much attention in terms of urban ecosystems and human health. Measures to improve green space in compact cities are important for urban sustainability. However, there is a knowledge gap between UGS improvement and planning management. Based on the integration of quantity and quality, this research aims to identify UGS changes during urban development and suggest ways to improve green space. We analyse land use changes, conduct a hotspot analysis of land surface temperature (LST) between 2005 and 2015 at the city scale, and examine the changes in small, medium and large patches at the neighbourhood scale to guide decision-makers in UGS management. The results show that (i) the redevelopment of urban brownfields is an effective method for increasing quantity, with differences depending on regional functions; (ii) small, medium and large patches of green space have significance in terms of improving the quality of temperature mitigation, with apparent coldspot clustering from 2005 to 2015; and (iii) the integration of UGS quality and quantity in planning management is beneficial to green space sustainability. Green space improvement needs to emphasize the integration of UGS quantity and quality to accommodate targeted planning for local conditions.
Basic and Applied Ecology · 1 Zitationen · DOI
Knowledge on the status and trends of biodiversity in urban areas is scattered and biased towards a few taxonomic groups, despite the fact that cities are where most humans get in touch with nature today. As part of the German Biodiversity Assessment (‘Faktencheck Artenvielfalt’), we conducted a nationwide review of published studies that recorded species occurrences in urban areas in Germany. We found that urban areas can host a large proportion of all plant, animal, and fungal species found in Germany, thus contributing to the nationwide conservation of biodiversity. However, compared to other habitat types outside of cities, the number of studies analysing the status and trends of urban biodiversity is relatively small. We could not identify a general trend over time for species diversity in German cities, based on the available studies. Even within individual species groups, there are combinations of declining, positive, and/or neutral trends. Information on population trends remains limited. Similarly, evidence of whether urbanisation promotes the homogenisation or differentiation of species groups is weak, with those groups investigated more thoroughly showing mixed patterns. With regard to biodiversity promotion, preserving the environmental heterogeneity that contributes to biodiversity is important, such as the maintenance of various habitat types (forests, parks, gardens, ponds, streams, etc.) that offer various food and nesting resources. Hence, the proportion of built-up impervious areas must remain limited, i.e. must not increase, and additional measures to promote biodiversity must be implemented. However, local authorities are largely ill-equipped to systematically monitor species occurrence across the variety of habitat types, or elements of green-blue infrastructure and taxonomic groups in cities. We discuss these findings, considering international urban biodiversity assessments and suggest key attributes of an effective national monitoring system to support urban biodiversity conservation and enhancement.
SSRN Electronic Journal · 1 Zitationen · DOI
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