Ecological Engineering最新文献

{"title":"Towards the reference ecosystems for quartzitic campo rupestre: Floristic composition and soil relationships","authors":"Jéssica Cunha-Blum ,&nbsp;Letícia Ramos ,&nbsp;Daniel Negreiros ,&nbsp;Dario C. Paiva ,&nbsp;Vanessa M. Gomes ,&nbsp;Leonardo M. Borges ,&nbsp;Aristônio M. Teles ,&nbsp;G. Wilson Fernandes","doi":"10.1016/j.ecoleng.2024.107463","DOIUrl":"10.1016/j.ecoleng.2024.107463","url":null,"abstract":"<div><div>The loss and fragmentation of tropical habitats, especially extreme megadiverse environments like the <em>campo rupestre</em> (rupestrian grassland), impacts biodiversity and ecosystem services essential to millions of people. The <em>campo rupestre</em> is a grassy ecosystem of the Cerrado biome, a center of endemism in Brazil with high floristic richness and environmental heterogeneity, where plants have developed multiple adaptive strategies and form a vegetation mosaic shaped by local soil and microhabitat conditions. However, this ecosystem has been under severe land use conversion, while signs of augmenting pressure from climate change are now recorded at faster pace. Thus, understanding the particularities of its multiple habitats is fundamental to define habitat specific references to guide conservation and restoration projects that lead to increased biodiversity. In this work, for the first time, we characterize the floristic composition of the shrub and herbaceous strata and related them to the edaphic characteristics of the four main habitats that form the <em>campo rupestre</em> mosaic: rocky outcrop, stony grassland, sandy grassland, and peat bog. A total of 12,000 m² of shrub layer (120 plots of 10 × 10 m) and 120 m² (120 plots of 1 × 1 m) of herbaceous layer were sampled. We recorded 257 species belonging to 47 different families, and also observed a high species turnover among the four different habitats. Furthermore, we identified species from both ends of the edaphic gradient of the four habitats and emphasized the importance of multiregional studies to evaluate the association among species and soils before implementing any restoration project. This study provides the knowledge base to build the reference ecosystems for the mosaic of <em>campo rupestre</em> habitat types.</div></div>","PeriodicalId":11490,"journal":{"name":"Ecological Engineering","volume":"211 ","pages":"Article 107463"},"PeriodicalIF":3.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"vertECO® vertical green wall system demonstration for domestic wastewater treatment and on-site reuse in an Austrian eco-village","authors":"Tamara Vobruba ,&nbsp;Marco Hartl ,&nbsp;Guenter Langergraber ,&nbsp;Bernhard Pucher ,&nbsp;Heinz Gattringer ,&nbsp;Gaetano Bertino ,&nbsp;Franz Panzenböck ,&nbsp;Johannes Kisser","doi":"10.1016/j.ecoleng.2024.107460","DOIUrl":"10.1016/j.ecoleng.2024.107460","url":null,"abstract":"<div><div>In recent years, various green wall systems for on-site wastewater treatment have been developed and investigated. One of them, the vertECO®, was created by alchemia-nova and consists of aerated basins aligned stepwise vertically in series having a subsurface horizontal flow hydraulic regime. The system has proven effective for treatment of greywater and the liquid fraction of blackwater in previous studies. To the authors knowledge this study is the first to demonstrate the treatment efficiency of a full-scale green wall system receiving all fractions of domestic wastewater. Four parallel vertECO® system modules were used, with 2 m long basins, receiving a total of 500 L/d of mechanically pre-treated wastewater from an eco-village in Austria. vertECO® purified water is stored in integrated tanks underneath the system and ozonated three times per day while being recirculated in the treated water tanks, aiming at water and nutrient reuse in the local agriculture. Wastewater feeding started in May 2022 and the sampling period extends from November 2022 till July 2023. The organic loading rate based on the cross-sectional surface area (OLR_cs) of the systems amounts to 57 g BOD₅/m²d and 48 g TN/m²d. vertECO® effluent results show that average values are already below EU water reuse regulation thresholds for reclaimed water quality class C (only drip irrigation), and the average effluent values after vertECO® and ozonation combined are below thresholds for class B (BOD₅ ≤ 25 mg/L, TSS ≤ 35 mg/L Legionella &lt;1000 CFU/L and <em>E. coli</em> ≤ 100 CFU/100 mL) and meet Austrian local permit requirements with an average of BOD₅ &lt; 3 mg/L, TSS 1.3 mg/L, Legionella &lt;1 CFU/L and <em>E. coli</em> result of 65 CFU/100 mL, whereas singular sampling event results even reach EU reuse class A (e.g., additional raw eaten vegetables and more can be irrigated).</div></div>","PeriodicalId":11490,"journal":{"name":"Ecological Engineering","volume":"211 ","pages":"Article 107460"},"PeriodicalIF":3.9,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Technosols made of urban wastes are suitable habitats for flora and soil macrofauna","authors":"Charlotte Pruvost ,&nbsp;Jérôme Mathieu ,&nbsp;Jeanne Vallet ,&nbsp;Florence Dubs ,&nbsp;Agnès Gigon ,&nbsp;Thomas Lerch ,&nbsp;Manuel Blouin","doi":"10.1016/j.ecoleng.2024.107457","DOIUrl":"10.1016/j.ecoleng.2024.107457","url":null,"abstract":"<div><div>Cities are increasingly recognized as specific ecosystems, in which green infrastructures, gardens, parks… can offer new habitats to flora and fauna. Cities also have a limited ability to recycle waste, which could be improved by transforming certain construction waste into Technosols. Here, we show that Technosols made of “fine earth”, excavated from deep soil horizons and usually deposited in landfills by the building sector, can promote plant growth, plant diversity and soil macrofauna. A four-year follow-up showed diversity and abundance levels comparable to temperate meadows. It also suggests a strong potential in terms of carbon storage. This solution could thus simultaneously supply a resource for local green spaces, reduce construction waste in landfills, lessen topsoil removal from neighboring environments, helping cities to take their part in climate change mitigation and biodiversity conservation efforts.</div></div>","PeriodicalId":11490,"journal":{"name":"Ecological Engineering","volume":"211 ","pages":"Article 107457"},"PeriodicalIF":3.9,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nature-based mitigation of shoreline erosion risks in tidal marshes created by managed realignment vs. sediment nourishment","authors":"Marte M. Stoorvogel ,&nbsp;Pim W.J.M. Willemsen ,&nbsp;Jim van Belzen ,&nbsp;Stijn Temmerman ,&nbsp;Jan M. de Jonge ,&nbsp;Johan van de Koppel ,&nbsp;Tjeerd J. Bouma","doi":"10.1016/j.ecoleng.2024.107439","DOIUrl":"10.1016/j.ecoleng.2024.107439","url":null,"abstract":"<div><div>Tidal marshes provide many valuable ecosystem services and can play an important role in nature-based flood risk mitigation along low-lying coasts and estuaries, by attenuating waves and increasing erosion resistance. There is an effort around the world to restore or create tidal marshes, but it remains unknown how different marsh restoration and creation techniques affect the development of erosion resistant sediment beds, which is essential for their contribution to long-term erosion and flood risk mitigation. Here, we compared sediment shear strength and erosion resistance under very high flow velocity (i.e. as may occur during the breach of a dike or seawall behind the marsh) of a managed realignment site versus a sediment nourishment site, restored and created respectively, and assessed the effects of tidal inundation, sediment characteristics, and vegetation. Managed realignment consists of the landward relocation of flood defence structures like seawalls and dikes and tidal flooding of low-lying land, creating a sheltered environment for tidal deposition of fine-grained sediments, while sediment nourishment is the seaward placement of mostly more coarse-grained dredged sediment. This study showed that at both sites sediment shear strength and erosion resistance were higher at vegetated locations than at unvegetated locations. In addition, at the managed realignment site, tidal inundation duration affected shear strength negatively, while bulk density affected shear strength positively. At the sediment nourishment site, sediment grain size was the most important driving factor of shear strength and erosion resistance, besides vegetation presence: a decreasing shear strength and erosion resistance were observed with increasing sediment grain size. Managed realignment and sediment nourishment both have advantages and disadvantages for the fast development of an erosion resistant sediment bed. Managed realignment will likely lead to fine-grained, cohesive sediments, which are in this case colonised by dense, but slowly establishing, mud-loving <em>Spartina</em> vegetation. In contrast, sediment nourishments are typically done with more coarse-grained, non-cohesive sediments, which are in this case colonised by initially sparse, fast establishing <em>Salicornia</em> vegetation. Dense <em>Spartina</em> increased erosion resistance more than sparse <em>Salicornia</em>. If we plan well ahead of time and temporarily support their development, restored or created marshes have time to become erosion resistant, thereby enabling sustainable use of marsh ecosystem services for long-term nature-based flood risk mitigation.</div></div>","PeriodicalId":11490,"journal":{"name":"Ecological Engineering","volume":"210 ","pages":"Article 107439"},"PeriodicalIF":3.9,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facilitative interactions promote biodiversity in various ecosystems: Implications for ecosystem management and restoration","authors":"Dongdong Qiu ,&nbsp;Yanpeng Zhu ,&nbsp;Yueheng Ren ,&nbsp;Zhichao Xu ,&nbsp;Zhanjun Quan","doi":"10.1016/j.ecoleng.2024.107455","DOIUrl":"10.1016/j.ecoleng.2024.107455","url":null,"abstract":"<div><div>Positive interactions, such as facilitation and mutualism, can promote community construction and maintenance of ecosystem biodiversity and resilience. However, there are few global meta-analyses on whether and how facilitative interactions affect biodiversity indices in terrestrial and aquatic ecosystems. We synthetically reviewed 344 studies of the effects of facilitative interactions on biodiversity, and reviewed and meta-analyzed 177 studies, which contain available data about the effects of facilitative interaction on ecosystem biodiversity, richness, and abundance. The results indicated an upward trend for the number of studies published annually on this topic, particularly after 2010, reflecting an increasing interest in facilitative interactions. Most studies were conducted in North America and Europe, followed by South America, Asia, Oceania, and Africa. Most studies were conducted in marine and coastal ecosystems and grasslands, followed by forests, shrublands, deserts, and inland wetlands. Our meta-analyses showed that facilitative interactions significantly increased the Shannon diversity, species richness, and species abundance in various terrestrial and aquatic ecosystems, even if several studies showed non-significant or negative effects. Facilitators promoted species biodiversity mainly by reducing physical or biotic stress, ameliorating harsh environments, spreading pollen, providing shelter, and defending against enemies. We conclude that facilitative interactions are essential in maintaining and promoting the biodiversity of various ecosystems. Thus, the conservation of facilitator species should be a priority, and facilitative interactions should be applied to ecosystem restoration and management.</div></div>","PeriodicalId":11490,"journal":{"name":"Ecological Engineering","volume":"210 ","pages":"Article 107455"},"PeriodicalIF":3.9,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantifying restored riparian buffer delineation accuracy and detectability in multitemporal imagery","authors":"Ge Pu ,&nbsp;Lindi J. Quackenbush ,&nbsp;John C. Stella","doi":"10.1016/j.ecoleng.2024.107450","DOIUrl":"10.1016/j.ecoleng.2024.107450","url":null,"abstract":"<div><div>We used multitemporal imagery to map tree cover and quantify the accuracy and detectability of planted riparian buffers. We used data with two spatial resolutions and found that classification of 1 m National Agriculture Imagery Program (NAIP) imagery using a texture-based automatic delineation process matched visual interpretation in terms of both accuracy of tree cover mapping and detectability. In contrast, our method struggled to detect vegetation changes in the riparian buffers using moderate resolution 30 m Land Change Monitoring, Assessment, and Projection (LCMAP) data. Overall pixel-based map accuracy of buffer tree cover using the 1 m automatic process averaged 96 %, while the 30 m LCMAP-based maps had an average accuracy of 37 %. Using the 1 m NAIP imagery, we found on average it took 6 years for planted buffer trees to reach a 50 % detectability level, and 11 years to reach 100 % detectability. Detectability of riparian tree cover increased from 13 % to 98 % 11 years after planting using the 1 m process while the 30 m process consistently had around 9 % detectability. We found correlation between soil types associated with frequent flooding and weaker detection of buffer tree cover. Median slope did not have a strong correlation with delineation accuracy but did influence the magnitude and timing of detectability. The delineation process utilized in this study and the identification of potential impact factors on accuracy and detectability will support efforts to delineate riparian buffer tree cover in other regions.</div></div>","PeriodicalId":11490,"journal":{"name":"Ecological Engineering","volume":"210 ","pages":"Article 107450"},"PeriodicalIF":3.9,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-degradable ‘reef bags’ used for rubble stabilisation and their impact on rubble stability, binding, coral recruitment and fish occupancy","authors":"Tania M. Kenyon ,&nbsp;Conor Jones ,&nbsp;David Rissik ,&nbsp;Wills Brassil ,&nbsp;David Callaghan ,&nbsp;Neil Mattocks ,&nbsp;Tom E. Baldock","doi":"10.1016/j.ecoleng.2024.107433","DOIUrl":"10.1016/j.ecoleng.2024.107433","url":null,"abstract":"<div><div>Substrate stabilisation can be used to enhance coral recruitment where mobile rubble beds have formed post-disturbance. We trialled gabion-like ‘reef bags’, biodegradable coconut-fibre coir mesh bags filled with coral rubble at Pinnacle Bay and Bait Reef on the Great Barrier Reef. Most coir remained intact during the first 12 months, but had completely biodegraded after 2 years, leaving behind the experimental rubble mounds. After approximately 2 years, fish abundance was higher above mounds compared to surrounding rubble. After approximately 3 years, rubble stability and binding was also higher in rubble mounds than in surrounding rubble at Pinnacle Bay, but not at Bait Reef (although binding <em>did</em> increase in Bait Reef mounds over this time). The increased stability and binding did not, however, translate to significantly higher coral recruitment on rubble mounds in either location. The placement of these reef bags in terms of depth, reef zone, sediment load and competition appears crucial. Future trials should consider the size and interlocked-ness of rubble, the size of reef bags, larger mesh hole sizes, the number of layers of coir, and include unbagged mounds.</div></div>","PeriodicalId":11490,"journal":{"name":"Ecological Engineering","volume":"210 ","pages":"Article 107433"},"PeriodicalIF":3.9,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"29 years of carbon sequestration in two constructed riverine wetlands","authors":"Daniel Ruane ,&nbsp;Jay Martin ,&nbsp;Michael Brooker ,&nbsp;Blanca Bernal ,&nbsp;Chris Anderson ,&nbsp;Robert Nairn ,&nbsp;William J. Mitsch","doi":"10.1016/j.ecoleng.2024.107435","DOIUrl":"10.1016/j.ecoleng.2024.107435","url":null,"abstract":"<div><div>The International Panel on Climate Change (IPCC) has made it clear that a reduction in carbon emissions and a promotion in carbon sequestration are necessary in order to prevent the planet from reaching catastrophic warming levels of 1.5 °C globally. The IPCC identifies the investment in “high‑carbon ecosystems” as a potential mitigation strategy, with one such ecosystem being wetlands. Historically, the majority of the world's wetlands have been destroyed due to human activities, with the midwestern U.S. being one of the most affected regions. Only in recent history has the U.S. sought to remedy this by mandating the construction of wetlands to replace those that are drained. While long-term carbon sequestration rates for natural wetlands are well-documented, it is unknown how constructed wetlands sequester carbon long-term. The Olentangy River Wetland Research Park (ORWRP) in Columbus, Ohio, USA is an ideal location to research this due to its extensive datasets collected over 29 years of biogeochemical and ecological monitoring. We used soil core samples taken across two constructed freshwater wetlands to quantify carbon storages and paired this data with similar studies at 18-month, 10-year, and 15-year milestones to create a timeline of carbon sequestration across 29 years. Our findings suggest that both wetlands have sequestered relatively equal amounts of carbon since construction and neither have shown a net gain or loss since year 15. At year 29, the average carbon storage between both wetlands is 3.58 ± 2.21 kg C m⁻² which equates to 0.12 ± 0.08 kg C m⁻² yr⁻¹, which is similar to other constructed wetlands. Results indicate that these wetlands likely have reached stability and are not expected to exhibit future carbon gains or losses under current conditions. Because these and other constructed wetlands have greater carbon sequestration rates than other options for conversion of croplands, they represent a successful climate change mitigation strategy.</div></div>","PeriodicalId":11490,"journal":{"name":"Ecological Engineering","volume":"210 ","pages":"Article 107435"},"PeriodicalIF":3.9,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revegetation of Elymus grasses suppresses invasive Rhamnus cathartica in deciduous forest understories","authors":"Michael J. Schuster ,&nbsp;Peter D. Wragg ,&nbsp;Alex M. Roth ,&nbsp;Paul Bockenstedt ,&nbsp;Lee Frelich ,&nbsp;Peter B. Reich","doi":"10.1016/j.ecoleng.2024.107438","DOIUrl":"10.1016/j.ecoleng.2024.107438","url":null,"abstract":"<div><div>Common buckthorn (<em>Rhamnus cathartica</em>) is one of the most widespread invaders of temperate forest and woodland understories in North America. Eradication of buckthorn is a common management goal, but one that is rarely realized since buckthorn quickly re-establishes in managed communities with low biotic resistance. In the years following management, pre-existing native propagules that could potentially re-establish and resist buckthorn re-establishment are scarce whereas buckthorn propagule pressure remains high. Thus, invaded understories often return to or remain in a buckthorn-dominated state when efforts focus only on treating buckthorn over a short period of time. Here, we test the hypothesis that post-management seeding of native graminoids and forbs increases competition and reduces buckthorn re-establishment. We compared pairs of seeded and unseeded plots (<em>n</em> = 35) across 7 sites undergoing buckthorn management near St. Paul, Minnesota, USA from 2017 to 2022. Over that time, we monitored herbaceous cover and light availability as well as the germination, growth, and survival of four cohorts of buckthorn seeds planted into each plot. We found that seeding increased cover of native herbaceous species (especially <em>Elymus</em> grasses and other graminoids) in areas with &gt;7 % tree canopy openness, which in turn reduced light availability to germinating buckthorn by one third. These changes in herbaceous cover and light availability reduced buckthorn growth and survival in complex ways. Effects of seeding on buckthorn were strongest immediately following initial management and in areas with greater tree canopy openness. By the end of the experiment, buckthorn germinating one- and two-years after initial management were 47 % less abundant and 81 % smaller in seeded areas compared to unseeded ones with more than 10 % tree canopy openness. Our findings indicate that post-management seeding of <em>Elymus</em> grasses and other graminoids can partially suppress buckthorn re-establishment in semi-open forests and woodlands following initial management (a critical period wherein buckthorn propagule pressure is high and ambient biotic resistance is low). By augmenting biotic resistance through post-management seeding, managers can effectively limit future invasion and reduce demands for additional management.</div></div>","PeriodicalId":11490,"journal":{"name":"Ecological Engineering","volume":"210 ","pages":"Article 107438"},"PeriodicalIF":3.9,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantifying geomorphic form variation for assessing habitat complexity of river restoration designs","authors":"Corey Dawson ,&nbsp;Peter Ashmore","doi":"10.1016/j.ecoleng.2024.107437","DOIUrl":"10.1016/j.ecoleng.2024.107437","url":null,"abstract":"<div><div>Rivers have historically been simplified to facilitate navigation, transportation, and water flow management. A shift towards naturalizing river channels and incorporating principles of fluvial geomorphology and ecology have progressed with variations in restoration approaches but channel design remains largely driven by conventional stabilization methods, particularly in urbanized watersheds. These approaches simplify channel morphology to accommodate changes in flow and sediment regimes induced by catchment-scale urbanization and have led to calls for more process-based solutions to enhance the natural dynamics of geomorphic riverscape design and improve ecological integrity. To understand the effects of restoration design on channel morphological variety, we take advantage of high-resolution digital elevation models to evaluate 28 real-world river restoration design projects of various types by applying the Geomorphic Form Variation (GFV) approach to quantify surface-form complexity differences. Pre-existing and designed river channels were evaluated and changes in surface-form variety associated with restoration design methods and project types were measured. Project cases were categorized as 1) stabilization, 2) full channel realignment, and 3) habitat enhancement types and GFV values were illustrated with hotspot cluster maps for comparative assessment. Stabilization project cases showed decreased GFV values resulting from simplified morphological features, planform channel shape, and floodplain surface topographies. Full channel realignment cases largely showed greater complexity resulting from increased sinuosity and added floodplain topographic variation while habitat enhancement cases conclusively increased GFV values with irregular in-channel bed forms and floodplain connectivity components such as multi-thread channel patterns. We demonstrate how GFV can serve as a valuable tool in assessing restoration design and construction outcomes and guiding the planning process towards enhancing geomorphic variety and habitat heterogeneity. This approach can point to nature-based channel design solutions that improve geomorphic complexity as a measure of natural morphology conditions where conventional stability methods may fall short in addressing geomorphic and ecological concerns.</div></div>","PeriodicalId":11490,"journal":{"name":"Ecological Engineering","volume":"210 ","pages":"Article 107437"},"PeriodicalIF":3.9,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}