{"title":"The effect of compost and moringa leaf extract biostimulant on the phytoremediation of gold mine tailing in South Africa using Chrysopogon Zizanioides (l.) roberty","authors":"N Mlalazi , L Chimuka , M D Simatele","doi":"10.1016/j.nbsj.2025.100266","DOIUrl":"10.1016/j.nbsj.2025.100266","url":null,"abstract":"<div><div>This study investigated the efficacy of compost and Moringa oleifera leaf extract (MLE) in enhancing the phytoremediation potential of vetiver grass on the gold mine tailings storage facilities (TSF) in the Witwatersrand goldfields region in South Africa. We hypothesized that: (1) Concentrations of heavy metals are high on the tailings material, (2) The growth and phytoremediation potential of vetiver grass will be enhanced in compost-amended tailings with MLE application, with the greatest improvement observed at the highest compost amendment rate (30 % > 15 % > 0 %). The TSF indeed exhibited elevated levels of heavy metals, with arsenic (As) and chromium (Cr) concentrations surpassing both Soil Screening Values (SSV) 1 and 2, while copper (Cu), lead (Pb), and nickel (Ni) levels exceeded SSV1, indicating potential environmental and health risks. A factorial split-plot design was employed, with three levels of compost treatment (0 %, 15 %, and 30 %) and either 0 % or 3 % MLE application sprayed on vetiver grass weekly for 16 weeks. The results showed that vetiver grass died in unamended tailings regardless of MLE application. However, there was no significant difference in growth parameters between vetiver planted on 15 % and 30 % compost amendment. The concentrations of As, Cr, Ni, and Cu were higher in the roots than in the leaves across all treatments. Application of MLE significantly reduced metal uptake (As, Cu, Cr, Ni) in vetiver roots in both the 15 % and 30 % compost amendments. But MLE did not affect the metal accumulation in the leaves of the vetiver grass except for a significant decrease in the uptake of As in 30 % compost amendment as well as a significant decrease in Ni in 15 % amendment. Pb was undetected in both leaves and roots. Notably, the application of MLE biostimulant significantly enhanced vetiver biomass in both 15 % and 30 % compost amendment treatments. This study highlights the synergistic benefits of combining compost and MLE, which enhanced phytostabilization by reducing metal uptake into roots while promoting vetiver grass growth. The findings have significant implications for tailings management, pollutant mitigation, bioenergy production, and carbon sequestration, offering a game-changing approach for sustainable and circular economy practices in mine tailings management.</div></div>","PeriodicalId":100945,"journal":{"name":"Nature-Based Solutions","volume":"8 ","pages":"Article 100266"},"PeriodicalIF":0.0,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Muhammad Baitullah Al Amin , Joko Sujono , Radianta Triatmadja
{"title":"Hydrological performance and design of bioretention systems for heavy rainfall management: A laboratory study","authors":"Muhammad Baitullah Al Amin , Joko Sujono , Radianta Triatmadja","doi":"10.1016/j.nbsj.2025.100265","DOIUrl":"10.1016/j.nbsj.2025.100265","url":null,"abstract":"<div><div>Bioretention systems are widely used for urban stormwater management, yet their performance under intense rainfall—especially in tropical regions—remains underexplored. This study evaluated the hydrological performance of three full-scale bioretention cells (100 × 50 × 70 cm) with varying soil–sand compositions, tested using a custom rainfall simulator. Saturated hydraulic conductivities ranged from 63.3 to 325.6 mm/hr. The Storm Water Management Model (SWMM) was used to simulate the bioretention cells and was calibrated and validated against experimental data, showing strong agreement (<em>r</em> > 0.9; <em>NSE</em> > 0.8). Results indicated that standard designs (100–300 mm/hr conductivity; 5% area coverage) were insufficient for mitigating peak flows under heavy rainfall events (<em>P</em> > 100 mm; <em>i<sub>ave</sub></em> > 10 mm/hr). Increasing area coverage from 5% to 30% reduced peak discharge by up to 50%, delayed peak runoff by 82 min, and extended detention time. Runoff volume reductions ranged from 2.1–11.2% for 2-year design storms and 1.4–6.8% for 50-year events. An area coverage of 10–20% is recommended for effective mitigation. Dimensionless empirical equations were developed for design applications, and refinements to SWMM’s percolation modeling are suggested to improve model accuracy.</div></div>","PeriodicalId":100945,"journal":{"name":"Nature-Based Solutions","volume":"8 ","pages":"Article 100265"},"PeriodicalIF":0.0,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sitong Liu , Meili Feng , Linjun Xie , Faith Ka Shun Chan
{"title":"Challenges and solutions for achieving carbon neutrality through urban green infrastructure in China’s future cities","authors":"Sitong Liu , Meili Feng , Linjun Xie , Faith Ka Shun Chan","doi":"10.1016/j.nbsj.2025.100263","DOIUrl":"10.1016/j.nbsj.2025.100263","url":null,"abstract":"<div><div>China has committed to achieving carbon neutrality by the 2060s. In this context, urban green infrastructure (UGI) is increasingly recognised as a nature-based solution with a significant potential for climate change mitigation and adaptation, while also contributing to the broader achievement of sustainable development goals. Although the carbon reduction potential of UGI is been widely acknowledged, several critical gaps remain in understanding its mitigation mechanisms, the integration with carbon qualification methods, the identification of influential factors, and the evaluation of UGI’s potential as a mainstream strategy for achieving carbon neutrality. This study systematically reviews evidence from 464 global publications, including 85 focused specifically on China, to address these gaps. We categorise UGI’s carbon mitigation mechanisms and align them with the corresponding carbon quantification methods, highlighting the strengths and limitations of each across three primary pathways: carbon sequestration, thermal regulation, and urban agriculture. Furthermore, we identify critical factors influencing carbon mitigation outcomes and assess the methodological trade-offs inherent in the different qualification approaches. The study also explores the current landscape of UGI-related carbon initiatives at multiple governance levels in China and offers recommendations for policy development at national, regional, and local scales. By synthesising scientific evidence with policy analysis, this research provides a foundation for leveraging UGI as an integrated and scalable strategy to support the achievement of carbon neutrality.</div></div>","PeriodicalId":100945,"journal":{"name":"Nature-Based Solutions","volume":"8 ","pages":"Article 100263"},"PeriodicalIF":0.0,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144903094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Carolyn Petersen , Jeppe Læssøe , Duncan Russel , Sebastian Elze , Ellen Banzhaf
{"title":"Interactive walkable floor maps as a science-policy-interface tool for nature-based solutions","authors":"Carolyn Petersen , Jeppe Læssøe , Duncan Russel , Sebastian Elze , Ellen Banzhaf","doi":"10.1016/j.nbsj.2025.100262","DOIUrl":"10.1016/j.nbsj.2025.100262","url":null,"abstract":"<div><div>This article investigates the use of Interactive Walkable Floor maps (IWFs) for exploring Nature-based Solutions (NbS) at the science-policy interface in three European city case studies. Using qualitative data from educational experiments and policy workshops, it investigates the use of IWFs for collaborative knowledge production between (natural and social) scientists, local practitioners and policy makers. This data is analysed through a conceptual framework adapted to examine policy learning outcomes. This article finds IWFs operated as an effective science-policy interface tool in two ways: a) interactions between scientists, educational researchers and practitioners influenced the design of the IWFs and facilitated local policy learning outcomes. b) The engagement of local NbS practitioners with social scientists led to collaborative policy learning outcomes, contributing futures-oriented spatial contextualisation and locally grounded policy learning. These are likely to be important for fostering policy change to tackle environmental problems as experienced by communities at local level.</div></div>","PeriodicalId":100945,"journal":{"name":"Nature-Based Solutions","volume":"8 ","pages":"Article 100262"},"PeriodicalIF":0.0,"publicationDate":"2025-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144867162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Jonoski , M.H. Ali , C. Bertini , I. Popescu , S.J. van Andel , A. Lansu
{"title":"Model-based design of drought-related climate adaptation strategies using nature-based solutions: case study of the Aa of Weerijs catchment in the Netherlands","authors":"A. Jonoski , M.H. Ali , C. Bertini , I. Popescu , S.J. van Andel , A. Lansu","doi":"10.1016/j.nbsj.2025.100264","DOIUrl":"10.1016/j.nbsj.2025.100264","url":null,"abstract":"<div><div>This article presents a methodology for designing and assessing drought-related Nature-Based Solutions (NBS) adaptation strategies on a catchment scale using an integrated hydrological model that simultaneously provides surface water and groundwater results. The Aa of Weerijs catchment, shared between Belgium and the Netherlands, was used for demonstrating the methodology. The model was developed with the MIKE SHE modelling system, using a combination of globally available and local data. Different types of NBS (ditch blocking, infiltration ponds, wetland restoration and heathland restoration) were combined spatially to develop two adaptation strategies with different spatial extents. Their design was based on drought-related Key Performance Indicators (KPIs) linked with water management actions by key stakeholders (bans on water extraction), both on the surface and groundwater. The KPI values were obtained by model simulations under current and future climate conditions, and with the implementation of the two adaptation strategies. The results show that the strategy with a larger spatial extent gives better KPI values, almost eliminating days with no groundwater availability in the downstream part of the catchment, reaching the goal of increased infiltration and groundwater recharge. Additionally, our results show that there is significant accumulation of positive effects from upstream to downstream.</div></div>","PeriodicalId":100945,"journal":{"name":"Nature-Based Solutions","volume":"8 ","pages":"Article 100264"},"PeriodicalIF":0.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144840720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ernita van Wyk , Luke Moore , Emma Lecavalier , Augustin Berghöfer , Raphael Karutz , Alphonce Kyessi , Gillian Maree
{"title":"Mainstreaming nature-based solutions in Dar es Salaam, Tanzania: a capacity perspective on transformative change","authors":"Ernita van Wyk , Luke Moore , Emma Lecavalier , Augustin Berghöfer , Raphael Karutz , Alphonce Kyessi , Gillian Maree","doi":"10.1016/j.nbsj.2025.100261","DOIUrl":"10.1016/j.nbsj.2025.100261","url":null,"abstract":"<div><div>The potential of nature-based solutions (NBS) to support transformative change is gaining wide attention. NBS are attractive to policy- and decision-makers because they can generate biodiversity gains, alleviate poverty, mitigate climate change impacts, promote local economic opportunities, offset biodiversity loss and advance efforts towards social justice. This paper considers a set of urban NBS mainstreaming tools for the City of Dar es Salaam, Tanzania, developed within the context of a grant-funded project. The development and ‘performance’ of these tools are analysed, in terms of their potential to support transformative capacity. This qualitative practice review shows that the NBS tools supported transformative capacity development components such as effective engagement of intermediaries and co-production of knowledge. Multiple entry points for transformative capacity and opportunities for iterative reflection and action are ideal for supporting transformative capacities during the course of a typical project. However, a deliberate approach to capacity enhancement is necessary to achieve more targeted outcomes for urban transformation by applying NBS tools. Without purposefully planning for capacity enhancement, positive outcomes may be present but fortuitous, undermining the potential for NBS mainstreaming to lay foundations for transformative change. This critical review of NBS practice suggests that purposeful incorporation of transformative capacity into project design and practice, including enabling conditions for practitioners and funders, is key to directing transformation through NBS.</div></div>","PeriodicalId":100945,"journal":{"name":"Nature-Based Solutions","volume":"8 ","pages":"Article 100261"},"PeriodicalIF":0.0,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144810289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Janzen , L. Narvaez , A. Ortiz-Vargas , J. O‘Connor , Y. Walz , Z. Sebesvari
{"title":"Ecosystem and disaster risk: A review of ecological indicators in the context of disaster risk assessments and discussion of their usefulness to inform ecosystem health","authors":"S. Janzen , L. Narvaez , A. Ortiz-Vargas , J. O‘Connor , Y. Walz , Z. Sebesvari","doi":"10.1016/j.nbsj.2025.100260","DOIUrl":"10.1016/j.nbsj.2025.100260","url":null,"abstract":"<div><div>Ecosystems play a critical role in reducing disaster risk by providing ecosystem services (ESS) that influence all components of risk. The capacity to deliver ESS depends on the health of the ecosystem itself. Thus, it is key to consider ecosystem health in risk assessments for a comprehensive understanding of disaster risk and effective disaster risk management. The paper reviews ecosystem-related indicators used in disaster risk or vulnerability assessments to better understand how, and to what degree, ecosystems and their health are currently considered in indicator-based assessments relating to flood, drought and storms. Of 231 reviewed papers just under half recognise ecosystems’ role in disaster risk, and only some 35 % use “ecologically-relevant” indicators, showing that ecological systems and their health are generally underrepresented in risk and/or vulnerability assessments. Among the 284 indicators extracted from the papers, most do not capture health directly, with over 60 % being land use land cover (LULC)-related indicators, which offer little insights on the condition of the ecosystem. This paper emphasises the need to move beyond LULC. It identifies indicators that represent characteristics of a healthy ecosystem, linked to <em>e.g.</em> biodiversity and ecosystem connectivity and calls for ecological baselines for understanding and monitoring ecosystem health.</div></div>","PeriodicalId":100945,"journal":{"name":"Nature-Based Solutions","volume":"8 ","pages":"Article 100260"},"PeriodicalIF":0.0,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Te Kāhui Kuhukura wellbeing index","authors":"John Reid , Amanda Yates","doi":"10.1016/j.nbsj.2025.100257","DOIUrl":"10.1016/j.nbsj.2025.100257","url":null,"abstract":"<div><div>Place-based, Indigenous ways of knowing have real relevance in a context of urban system change. Indigenous approaches have developed over time in places that are understood as ecological entities and venerated kin, not geological resource. Such socio-ecological and nature-responsive models are evidenced to offer the adaptive, ecologically ethical and responsive strategies needed at this time of complex ecological crisis. The research discussed here is founded in a complex Indigenous wellbeing concept – mauri ora - that links social and ecological wellbeing together as an indissoluble whole. Earlier research developed an urban mauri-centered “compass” that oriented users towards nature-based and socio-ecological approaches to urban wellbeing. An urban wellbeing data display was also developed that measured and visualised current states of social, cultural and ecological wellbeing. This mauri-centered research methodology was then tested out in place, in Waitaha/Canterbury, in the South Island of Aotearoa, New Zealand. Working with Te Kāhui Kahukura, a group of Māori Iwi kin authorities, a wellbeing index was developed. In this paper we describe the research context, the place-based index and its key domains and measures that assess socio-ecological wellbeing as a complex whole in the context of urban environments.</div></div>","PeriodicalId":100945,"journal":{"name":"Nature-Based Solutions","volume":"8 ","pages":"Article 100257"},"PeriodicalIF":0.0,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Integrated valuation of the ecological, social and economic benefits provided by a multifunctional nature-based solution","authors":"Laura Costadone , Shan Zhang","doi":"10.1016/j.nbsj.2025.100256","DOIUrl":"10.1016/j.nbsj.2025.100256","url":null,"abstract":"<div><div>Nature-based Solutions (NbS) offer multifunctional approaches to address climate change and environmental challenges, providing a sustainable alternative to traditional gray infrastructure. Despite their promise, widespread adoption remains limited, in part due to an incomplete understanding of their full costs and benefits relative to conventional infrastructure. Traditional benefit–cost analyses often overlook non-monetized benefits and the interconnected ecosystem services provided by NbS. This study introduces a methodological approach to quantify both the physical and monetary value of ecosystem services and co-benefits delivered by an NbS project. We applied an integrated valuation framework to a case study in Virginia Beach, VA, USA, where a city-owned golf course is being converted into a multifunctional stormwater park designed to enhance flood mitigation, support ecosystem restoration, and provide recreational opportunities. Four key ecosystem services were quantified: flood mitigation, microclimatic cooling, pollinator abundance, and environmental quality and amenities. The Hydrologic and Hydraulic (PC SWMM) model predicted a 50 % reduction in structural damages caused by flooding events, while the InVEST pollination model forecasted an increase in the pollinator abundance index from 0.085 to 0.132 due to native vegetation. ENVI-Met climate modeling revealed a 5.6 °C air temperature reduction in tree-covered areas around recreational paths. The hedonic pricing model estimated a 2.4 % increase in nearby property values. Incorporating these ecosystem services into a Benefit-Cost Ratio (BCR) analysis raised the BCR from 1.46 to a range of 1.6–2.1. These findings highlight the economic and environmental value of integrating NbS into urban planning, enhancing resilience and long-term sustainability for communities and ecosystems.</div></div>","PeriodicalId":100945,"journal":{"name":"Nature-Based Solutions","volume":"8 ","pages":"Article 100256"},"PeriodicalIF":0.0,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Luciana Villa Castrillón , Benjamin Jacob , Thomas H. Badewien , Joanna Staneva
{"title":"Nature-based solutions: leveraging the coastal protective potential of seagrass in the Jade Bay region","authors":"Luciana Villa Castrillón , Benjamin Jacob , Thomas H. Badewien , Joanna Staneva","doi":"10.1016/j.nbsj.2025.100255","DOIUrl":"10.1016/j.nbsj.2025.100255","url":null,"abstract":"<div><div>This study assesses the potential of seagrass meadows as a Nature-based Solution (NbS) to mitigate coastal risks in two locations within the southern German Wadden Sea: Jade Bay and the Outer Weser estuary. Using the unstructured-grid model framework SCHISM (Semi-implicit Cross-scale Hydroscience Integrated System Model), coupled with wind wave and sediment transport modules, we simulated hydrodynamic processes over a two-year period (2019–2020), with a focus on the impact of an extreme weather event. We examined the hydrodynamic, wave, and sediment effects of seagrass presence versus absence under both typical and storm conditions and evaluated two restoration site scenarios. The results demonstrate that seagrass can substantially attenuate wave heights (up to 40 %) and bed shear stress (up to 70 %). Risk mapping further indicates that seagrass consistently reduces areas classified as high erosion risk and delays the onset of sediment resuspension during storms. These findings emphasize the protective function of seagrass and support its broader application as a scalable and adaptive strategy for enhancing coastal resilience under climate-driven pressures.</div></div>","PeriodicalId":100945,"journal":{"name":"Nature-Based Solutions","volume":"8 ","pages":"Article 100255"},"PeriodicalIF":0.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}