Journal of Great Lakes Research最新文献

{"title":"Climate change impacts on hydrology and phosphorus loads under projected global warming levels for the Lake of the Woods watershed","authors":"Phil Fong ,&nbsp;Rajesh R. Shrestha ,&nbsp;Yongbo Liu ,&nbsp;Reza Valipour","doi":"10.1016/j.jglr.2025.102636","DOIUrl":"10.1016/j.jglr.2025.102636","url":null,"abstract":"<div><div>Climate change and variability could directly impact inflows and nutrients from the watershed into Lake of the Woods (LoW), which has been experiencing seasonal algal blooms with a shift in community composition of bloom species mostly to toxin species over the past decades. The main contributing factor to these blooms is deemed to be external inflowing total phosphorus (TP) mostly from the Rainy River. Here, we advance our understanding of potential impacts of climate change on streamflow and non-point source (NPS) TP in the LoW watershed. To this end and for the first time, we developed LoW watershed CanSWAT (Soil and Water Assessment Tool) models forced with climate projections from seven downscaled Coupled Model Intercomparison Project Phase 6 Global Climate Models under two Shared Socioeconomic Pathways. We analyzed hydrological and water quality change at policy-relevant +1.5 to +3.0 °C Global Mean Temperature (GMT) above the pre-industrial period. Under 1.5–3.0 °C GMT increases, projected mean runoff (NPS TP) is 7.3–36.6 % (1.5–117.6 %) and 7.5–31.7 % (−1.6 to 81.4 %) higher than the 1980–2010 reference period in winter/spring in the Precambrian Shield and Agassiz zone, respectively; and lower in summer (−3.0 to −18.8 % (−0.01 to −20.1 %) for both regions). Changes in mean annual Rainy River NPS TP range from −1.8 to 3.1 %. Furthermore, there is a shift in seasonal delivery of NPS TP loads to LoW with winter/spring increases (3.5–26.8 %) and summer/autumn reductions (−0.01 to −14.8 %), which could potentially affect algal productivity and general water quality in LoW. These findings provide important insights to inform future water quality and nutrient management plans.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102636"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Emigration probabilities and survival estimates of stocked juvenile lake sturgeon (Acipenser fulvescens) within the Genesee River, NY","authors":"Kyle T. Morton ,&nbsp;Dimitry Gorsky ,&nbsp;Dawn Dittman ,&nbsp;Matthew E. Altenritter","doi":"10.1016/j.jglr.2025.102656","DOIUrl":"10.1016/j.jglr.2025.102656","url":null,"abstract":"<div><div>Knowledge of juvenile lake sturgeon (<em>Acipenser fulvescens</em>) survival is important both to understanding changes in population abundance and for assessing the efficacy of management practices like stocking. High mortality rates of juvenile fish are partially mitigated by stocking hatchery-raised individuals; however, survival of post-stocked lake sturgeon remains lower compared to survival at older life stages. In this study, acoustic telemetry data from 69 age-0+ (weight: <span><math><mrow><mover><mrow><mi>x</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow></math></span> = 29 g, range = 2–41 g; length: <span><math><mrow><mover><mrow><mi>x</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow></math></span> = 198 mm, range = 176–223 mm) and 30 sub-adults (weight: <span><math><mrow><mover><mrow><mi>x</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow></math></span> = 2144 g, range = 1100–7020 g; length: <span><math><mrow><mover><mrow><mi>x</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow></math></span> = 751 mm, range = 605–1020 mm) tagged in the fall of 2019 and 2020 were utilized to construct a multi-state model used to estimate both survival and spatial transitions between the Genesee River and Lake Ontario. Sub-adults (approximate ages: 4–7 years) had estimated survival rates exceeding 88 % in both the Genesee River and Lake Ontario. Age-0+ lake sturgeon displayed much lower survival rates that ranged between 31 % (Lake Ontario) and 77 % (Genesee River). Both age-0+ and sub-adults lake sturgeon were most likely to leave the Genesee River in the fall and winter months, while being most likely to return in the spring and summer months. The approach used in this study to estimate survival is hypothesized to have led to higher survival estimates than traditional Capture-Mark-Recapture (CMR) derived estimates as a result of accounting for emigration from the Genesee River.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102656"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Larger larval sea lamprey (Petromyzon marinus) have longer survival times when exposed to the lampricide 3-trifluoromethyl-4-nitrophenol","authors":"Allison M. Nalesnik ,&nbsp;Emily L. Martin ,&nbsp;Ian S. Kovacs ,&nbsp;Connor S. Johnson ,&nbsp;Emma I. Carroll ,&nbsp;Aaron Jubar ,&nbsp;William Hemstrom ,&nbsp;Michael P. Wilkie ,&nbsp;Erin S. Dunlop ,&nbsp;Maria S. Sepulveda ,&nbsp;Nicholas S. Johnson ,&nbsp;Mark R. Christie","doi":"10.1016/j.jglr.2025.102620","DOIUrl":"10.1016/j.jglr.2025.102620","url":null,"abstract":"<div><div>Invasive sea lamprey (<em>Petromyzon marinus</em>) in the Laurentian Great Lakes have negatively impacted ecologically and economically important fishes for nearly a century. To mitigate these effects, the lampricide 3-trifluoromethyl-4-nitrophenol (TFM) is applied annually on a rotating basis to selected Great Lakes tributaries to kill larval lamprey before they become juveniles, out-migrate to the lakes, and parasitize other fishes. It has been hypothesized that larval size (e.g., mass, length) may affect survival time in response to TFM. To test this hypothesis, we conducted an experiment with 8611 larvae across four temporal replicates, in which TFM concentrations equivalent to those used in present-day stream treatments were applied for up to 18 h. When examining the survival times of larval lamprey exposed to TFM, we found a significant, positive relationship between length, mass, toxicity, and their interactions. For every 1 mm increase in total length, a corresponding increase by 1 g of mass reduced survival time by 0.4315 min [95 % CI: 0.5283–0.2992] and vice versa (i.e., the significant interaction between length and mass revealed that as larvae increase in mass, the survival benefit to being longer decreases, and vice versa). The changes in total length and mass of larval sea lamprey stored in ethanol for 4 months was also quantified. The observation that five larvae survived well past the 12-hour time window of a typical TFM field treatment highlights the need for continuous monitoring and the development of new control strategies to ensure the continued effective management of this invasive species.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102620"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Sediment-water nutrient exchange across a diked Lake Erie coastal wetland, Ohio, USA","authors":"Michael P. Back ,&nbsp;Grace A. Watson ,&nbsp;Emily B. Campbell ,&nbsp;Hana C. Esber ,&nbsp;Justin Myers ,&nbsp;Corbin Kohart ,&nbsp;W.Robert Midden ,&nbsp;Silvia E. Newell ,&nbsp;Lauren E. Kinsman-Costello","doi":"10.1016/j.jglr.2025.102658","DOIUrl":"10.1016/j.jglr.2025.102658","url":null,"abstract":"<div><div>Coastal wetlands have the potential to mitigate nutrient pollution to the Great Lakes; however, a deeper understanding of how nutrients cycle between wetland sediment and surface water is still needed to calculate more accurate nutrient budgets. Using in situ and ex situ methods, we measured nutrient exchange at the sediment–water interface across a diked Lake Erie wetland (Turtle Creek Bay, Magee Marsh Wildlife Area, Ohio, USA). The wetland was recently reconnected to the neighboring stream with the goal of nutrient removal as part of the H2Ohio Initiative; however, historical management was aimed at creating waterfowl habitat. Vegetation now grows in distinct monotypic patches throughout the wetland. We characterized the site into five patches dominated by different vegetation groups: <em>Typha</em> spp., hardwoods, emergent, submerged, and floating vegetation. Sediments underlying emergent and submerged vegetation typically had greater rates of dissolved reactive phosphorus retention than those underlying hardwoods, but only when measured ex situ. Sediments in most patches released ammonium when measured ex situ but retained ammonium when measured in situ (using stacked resin bags), suggesting that ex situ intact sediment core incubations may overestimate the magnitude of nutrient exchange rates. Regardless of vegetation patch, nutrient exchange was negatively related to surface water nutrient concentrations and positively related to sediment nutrient concentrations, suggesting that diffusion is an important driver of nutrient retention and release. Our results focus on understanding nutrient exchange at the patch scale which can inform more accurate models for estimating whole system nutrient removal potential in Great Lakes coastal wetlands.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102658"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Light-based small pelagic species fishing in Lake Albert: Divergent perceptions, conflicts, and implications for multispecies fishery management","authors":"Herbert Nakiyende ,&nbsp;Jackson Efitre ,&nbsp;Anthony Basooma ,&nbsp;Mbilingi Bwambale ,&nbsp;Dismas Mbabazi ,&nbsp;Joyce Akumu ,&nbsp;Veronica Mpomwenda ,&nbsp;Winnie Nkalubo ,&nbsp;Anthony Taabu-Munyaho ,&nbsp;Samuel Bassa ,&nbsp;Esther Kagoya ,&nbsp;Bairon Mugeni ,&nbsp;Gladys Bwanika ,&nbsp;Lauren Chapman","doi":"10.1016/j.jglr.2025.102664","DOIUrl":"10.1016/j.jglr.2025.102664","url":null,"abstract":"<div><div>Introduced around the turn of the 21st century, light-based fishing targeting small pelagic species (SPS) like <em>Engraulicypris bredoi</em> and <em>Brycinus nurse</em> (belonging to orders Cypriniformes and Characiformes, respectively, and known locally as muziri and rogoogi) has markedly transformed Lake Albert’s artisanal fishery. SPS now constitute an estimated 60–70 % of the lake’s annual catch, signalling a shift from the previously dominant large-bodied demersal species that defined the fishery until the 1990s. While this expansion reflects growing significance of SPS in contemporary fisheries, it has generated divergent perceptions and conflicts among stakeholders. These tensions are exacerbated by the lack of empirical evidence on the ecosystem-wide effects of light-based fishing, particularly its impacts on stocks of large-bodied species. This study, conducted across three landing sites (Dei, Kaiso, and Ntoroko) spatially spread along the Lake Albert shoreline, employed qualitative methods, including structured questionnaires and interviews, to investigate stakeholder perceptions of light-based fishing. Fishers targeting large-bodied species reported concerns over increased bycatch, gear damage, habitat degradation, and spatial competition. In contrast, stakeholders in the SPS sector emphasized the socio-economic benefits of the light fishery, particularly employment and income opportunities for youth and women along the entire value chain, from fishing to processing and trade. The contrasting views underscore the complexity of managing a rapidly evolving multispecies fishery. The findings highlight the urgent need for ecosystem-based assessments of light-based fishing impacts to inform science-based management strategies that can promote the sustainable growth of the SPS fishery while fostering coexistence and equity among diverse fisher groups.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102664"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"A multi-proxy reconstruction of coastal processes and Lake Erie flood events from Magee Marsh, northern Ohio","authors":"Sean M. Loeffler ,&nbsp;Ethan J. Tiong ,&nbsp;Mark Baskaran ,&nbsp;Thomas A. Bianchette","doi":"10.1016/j.jglr.2025.102648","DOIUrl":"10.1016/j.jglr.2025.102648","url":null,"abstract":"<div><div>Along the margins of the Great Lakes of North America, lake level fluctuations and flood events threaten coastal environments and infrastructure. However, little is known about coastal processes over centennial (or longer) timescales along these Great Lakes. In order to document overwash from Lake Erie that predates historical records, sediment cores MG19-3 and MG21-2 were extracted from Magee Marsh Wildlife Area on Lake Erie’s southwestern shore. Both cores were subjected to loss-on-ignition and x-ray fluorescence analysis; for core MG21-2, microfossils were analyzed, and chronology was established by ¹⁴C and ²¹⁰Pb_xs dating, while grain size was analyzed for core MG19-3. Cores consist of uniform clayey silt at the base overlain successively by a layer of sandy silt with sparse pebbles and shells, a thin layer of dark clay and silt, and a layer of coarse sand, pebbles, and shells. The uppermost sediments are organic-rich silt and peaty material. Sand layers contain low organic content, elevated carbonate content, and unique geochemical signatures relative to adjacent sediment depths. The sand layer signatures demonstrate that at least two intervals of overwash from Lake Erie occurred between 1430 CE (∼520 cal yr BP) and 1867 CE, attributed to separate processes of normal wave action and storm surge impact. These findings reveal that Magee Marsh serves as a repository to capture and preserve overwash deposits from Lake Erie. Future work investigating other Great Lakes coastal sites will enable regional correlation and insight into the periodicity and long-term impacts of these extreme events.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102648"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Microhabitat complexity and herpetofaunal diversity in a community-managed Afrotropical wetland of Lake Victoria","authors":"Mathias Behangana ,&nbsp;Achilles Byaruhanga ,&nbsp;Michael Kibuule ,&nbsp;Fiona Milembe ,&nbsp;Violet Kantono ,&nbsp;Fabio Petrozzi ,&nbsp;Luca Luiselli","doi":"10.1016/j.jglr.2025.102638","DOIUrl":"10.1016/j.jglr.2025.102638","url":null,"abstract":"<div><div>Wetlands play a critical role in sustaining biodiversity, particularly in tropical ecosystems where habitat loss and anthropogenic disturbances are accelerating. At the same time, community conservation has become a central topic in modern conservation biology. Therefore, in conservation and management terms, it is especially interesting to evaluate the biodiversity patterns in wetlands managed by local communities. This study assessed the diversity, abundance, and conservation status of herpetofauna in the Mabamba Bay Wetland, a key biodiversity reservoir in central Uganda within the Lake Victoria system, also designated as a Ramsar site. Through visual encounter surveys, audio sampling, and dip-netting conducted across five representative sites, we recorded 17 amphibian species and 18 reptile species. Amphibians were more diverse in sites with complex and less-disturbed habitats, while reptiles dominated more disturbed and open areas. Diversity indices, species accumulation curves, and richness estimators (Chao 1, Jackknife 1 &amp; 2) revealed significant spatial heterogeneity and suggested under-sampling for reptiles. Conservation status analysis indicated that most species were of Least Concern, though notable exceptions included Degen’s toad (<em>Sclerophrys vittata</em>)<em>,</em> African rock python (<em>Python sebae</em>), and Nile crocodile (<em>Crocodylus niloticus)</em>.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102638"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Spotless round gobies: A poorly described phenotype of Neogobius melanostomus","authors":"Jesica Goldsmit ,&nbsp;Yves Paradis ,&nbsp;Philippe Brodeur ,&nbsp;Virginie Boivin ,&nbsp;Nathalie Vachon ,&nbsp;Guillaume Côté ,&nbsp;Sarah Aubé","doi":"10.1016/j.jglr.2025.102643","DOIUrl":"10.1016/j.jglr.2025.102643","url":null,"abstract":"<div><div>The round goby (<em>Neogobius melanostomus</em>) is a widely distributed invasive fish, typically distinguished from morphologically similar native species by a prominent black spot on the first dorsal fin. Although spotless individuals have been reported, their prevalence and characteristics remain poorly documented. Spotless round gobies were discovered in the St. Lawrence and Richelieu rivers in Quebec, Canada. Mitochondrial DNA analysis confirmed their identity as <em>N. melanostomus</em>, indicating that the spotless form represents a phenotypic variant within the species. In both rivers, the frequency of this phenotype was found to be low, ranging from 0.18 to 1.14%, with no apparent association with sex and body length. To contextualize these findings, a literature review on this phenotype and its occurrence is presented. The existence of spotless round gobies may challenge public awareness and monitoring efforts, particularly those that rely on the presence of the typical dorsal spot for accurate species identification.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102643"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Contrasting bacterial diversity, community composition, and metabolic function of the sediment between two different regions in lake Chaohu, China","authors":"Keqiang Shao ,&nbsp;Chengrong Bai ,&nbsp;Xingyu Jiang ,&nbsp;Yang Hu ,&nbsp;Xiangming Tang ,&nbsp;Guang Gao","doi":"10.1016/j.jglr.2025.102621","DOIUrl":"10.1016/j.jglr.2025.102621","url":null,"abstract":"<div><div><span><span>Lake Chaohu, the fifth-largest freshwater lake in China, has been experiencing severe eutrophication and algal bloom problems. Owing to differences in trophic status, the lake is divided into two distinct regions. However, the sediment </span>bacterial communities<span> within the lake remain poorly understood. This study aims to fill this knowledge gap by comparing sediment bacterial communities between the two different lake regions using 16S rRNA gene amplicon sequencing. A total of 1,222,845 high-quality sequences were generated, encompassing 92 phyla and 3296 genera across 20 surface sediment samples. The results indicated that the pH, loss on ignition (LOI), and the total nitrogen (TN), total phosphorus (TP), and total </span></span>organic carbon<span> (TOC) concentration of sediments in the western region were significantly higher than those in the eastern region. Furthermore, bacterial α-diversity, β-diversity, and community composition in the sediments exhibited marked differences between the two lake regions. The functional profiles of the bacterial populations also revealed statistically significant differences in predicted functional composition among the two different lake regions. Redundancy analysis (RDA) identified that TN, TP, and TOC are the primary factors influencing the variations of sediment bacterial communities between the two different lake regions. Overall, this study substantially advances our understanding of sediment microbial ecology in eutrophic freshwater lakes.</span></div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102621"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Movement characterizations of stocked juvenile lake sturgeon (Acipenser fulvescens) within the Genesee River, NY","authors":"Kyle T. Morton ,&nbsp;Dimitry Gorsky ,&nbsp;Dawn Dittman ,&nbsp;Matthew E. Altenritter","doi":"10.1016/j.jglr.2025.102655","DOIUrl":"10.1016/j.jglr.2025.102655","url":null,"abstract":"<div><div>Knowledge of the movements of post-stocked juvenile lake sturgeon (<em>Acipenser fulvescens</em>) within and beyond the Genesee River of New York is limited. Describing lake sturgeon post-stocking movements could further the understanding of population structure and the delineation of nursery habitat. This project aimed to characterize the movements of juvenile sturgeon by tagging and tracking 69 age-0 + and 30 sub-adult lake sturgeon with acoustic transmitters from 2019 to 2021. Habitat use was disproportionate between the two life stages of juvenile sturgeon; age-0 + lake sturgeon primarily inhabited the upper reaches of the Genesee River, while sub-adults primarily utilized the lower dredged reaches of the Genesee River and the embayment outside of the river. A lower proportion of age-0 + lake sturgeon left the Genesee River relative to sub-adults, with seven sub-adult sturgeon (23.3 % of all tagged) moving to new habitats over 100 km away. Water temperature, discharge, and dissolved oxygen concentrations best predicted lake sturgeon movement within the river. These results indicate that the Genesee River is serving as a nursery habitat for juvenile lake sturgeon and that connectivity exists among the river, nearshore Lake Ontario habitats, and other tributaries. Such information is important when considering that management efforts for this species are commonly uniform across a system, while our results suggest a broader metapopulation framework may be relevant.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102655"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}