Anna C. Baker , Faith A. Fitzpatrick , Samuel S. Soderman , Michael J. Kennedy , Shelby P. Sterner , Jesse P. Anderson , Karen B. Gran , Krimson S. Anderson , Kevin Stroom , Phil Norvitch , James D. Blount , Matthew E. Gutzmann
{"title":"Near-channel erosion as a driver of watershed-scale sediment and phosphorus loading in a forested sub-watershed of Lake of the Woods","authors":"Anna C. Baker , Faith A. Fitzpatrick , Samuel S. Soderman , Michael J. Kennedy , Shelby P. Sterner , Jesse P. Anderson , Karen B. Gran , Krimson S. Anderson , Kevin Stroom , Phil Norvitch , James D. Blount , Matthew E. Gutzmann","doi":"10.1016/j.jglr.2025.102644","DOIUrl":"10.1016/j.jglr.2025.102644","url":null,"abstract":"<div><div>The Little Fork River, a forested watershed in northern Minnesota, United States, is a disproportionate contributor of sediment and phosphorus to Rainy River and Lake of the Woods. Sources of sediment and sediment-bound phosphorus to the Little Fork were investigated using complementary lines of evidence in the form of geochemical sediment fingerprinting and a stream-corridor sediment budget that included harvested forest and ravines, in addition to upland forest and agriculture, roads, and streambanks. Near-channel ravine and streambank sources comprised 95–100 % of streambed sediment and 79–100 % of suspended sediment at the river mouth, while tributaries had up to 50% of suspended sediment from upland sources including harvested forest, agriculture, and roads. Repeat suspended-sediment sampling at eight sites showed more source variability among sites than across events. Ravine erosion was the watershed’s largest contributor to downstream sediment and sediment-bound phosphorus loading, while streambed sediment had a larger streambank source. Near-channel erosion also contributed phosphorus, though with less labile and redox-sensitive forms than forest and agricultural soils. In contrast to observations from agricultural settings, suspended-sediment phosphorus concentrations were elevated above some, but not all sources. The effects of watershed size, glacial history, land cover, and variable temperature and precipitation on runoff generation and peak streamflow are important considerations for mitigating near-channel loss of sediment and phosphorus in the Little Fork. These results suggest that management of sediment and phosphorus export from the Little Fork could incorporate context for location in the watershed, geomorphic setting, and runoff characteristics.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102644"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242321","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":"Application of a data-limited stock assessment model to understand the historical population of cisco in Lake Erie","authors":"Laura M. Lee , John A. Sweka , Brian C. Weidel","doi":"10.1016/j.jglr.2025.102663","DOIUrl":"10.1016/j.jglr.2025.102663","url":null,"abstract":"<div><div>Historically, cisco (<em>Coregonus artedi</em>) supported one of the largest commercial fisheries in Lake Erie with over 25 million kilograms landed in a single year during the fisheries’ peak in 1912. Like many other coregonines in the Laurentian Great Lakes, the Lake Erie cisco population eventually collapsed and is now considered extirpated. Management interest in restoring coregonine abundance and diversity across the Great Lakes motivated the development of a multi-agency, science-based framework aimed at restoring or enhancing populations. As part of that framework, we applied a data-limited model (depletion-based stock reduction analysis) to a reconstructed catch series to estimate historical levels of abundance of cisco in Lake Erie. Estimated historical carrying capacity was 171 million kilograms (66.5 kg/ha) and estimated annual exploitation was as high as 70 %. Model projections suggested the population should have rebuilt following a fishery collapse in 1925; however, the fishery remained depressed and cisco disappeared from Lake Erie despite the end of targeted exploitation in 1965. Other factors, such as habitat degradation and invasive species, are believed to have played a part in impeding recovery of cisco. The results of this study could be used in setting potential restoration targets for Lake Erie cisco given current conditions. The likelihood of achieving recovery targets based on historical population size will be dependent on the suitability of current conditions for sustaining the population.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102663"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242343","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}
Sophia M. Bonjour , Robert D. Hunter , James J. Roberts , Travis O. Brenden , Scott F. Colborne , Matthew D. Faust , Christine M. Mayer , Robert Mapes , Richard T. Kraus , Robin D. Calfee , Matthew R. Acre
{"title":"Grass carp (Ctenopharyngodon idella) movement states and backwater use can inform removal efforts","authors":"Sophia M. Bonjour , Robert D. Hunter , James J. Roberts , Travis O. Brenden , Scott F. Colborne , Matthew D. Faust , Christine M. Mayer , Robert Mapes , Richard T. Kraus , Robin D. Calfee , Matthew R. Acre","doi":"10.1016/j.jglr.2025.102654","DOIUrl":"10.1016/j.jglr.2025.102654","url":null,"abstract":"<div><div>Expansion of grass carp (<em>Ctenopharyngodon idella</em>) within the Laurentian Great Lakes poses significant ecological and economic risks. Suppression efforts to remove grass carp have increased to curtail population growth, but capture efficiency remains low. One management challenge is the lack of understanding how this invasive species is using its novel habitats in the Great Lakes. This study aimed to identify spatiotemporal patterns in grass carp behavior and backwater use that could be exploited by management efforts, including removal. We used acoustic telemetry to examine when grass carp occurred in areas vulnerable to removal by boat electrofishing in the Sandusky River, Ohio, USA. Hidden Markov models were used to categorize behavioral states and evaluate their relationships with environmental factors. Best performing 2-state and 3-state hidden Markov models included proximity to backwater as a factor in state-dependent step length and transition probability between states, with a higher probability of being in less mobile states during the middle of the day and in backwaters. For the 2-state model, this less mobile state was also more common during warmer temperatures. Distinct diel patterns and backwater use identified in this study provide critical insights for improving management. Model results suggest that current removal efforts, focused primarily on the mainstem of the river, may benefit from adjustments in both timing and removal gear. The findings raise further questions about unobserved behaviors contributing to state assignment and sufficiently flexible adaptive management strategies to account for individual variation in grass carp behavior.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102654"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242342","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}
Muruleedhara N. Byappanahalli , Noel B. Pavlovic , Cindy H. Nakatsu
{"title":"Bacterial community structure across a sand dune chronosequence at the Indiana Dunes National Park","authors":"Muruleedhara N. Byappanahalli , Noel B. Pavlovic , Cindy H. Nakatsu","doi":"10.1016/j.jglr.2025.102611","DOIUrl":"10.1016/j.jglr.2025.102611","url":null,"abstract":"<div><div>The microbial role in dune succession along the Great Lakes freshwater sand dunes remains poorly understood. A chronosequence study was conducted to understand the relationships among soil bacterial communities, soil chemistry, and prescribed burning at the Indiana Dunes National Park. Soil bacterial communities and chemistry, as well as groundlayer vegetation were sampled during 2015 and 2017 from seven successional stages from the beach (contemporary) to the 14,000-year-old oak forest. Bacterial communities from unburned and burned sites among stages were determined by 16S rRNA gene amplicon sequencing. Soil pH and cations decreased from early (beach, foredune, secondary dune, and woodland transition) to late (oak savanna, woodland, and oak forest) successional stages, while organic matter and organic carbon concentrations increased in the late successional stages. Bacterial alpha diversity showed no significant differences among stages, but a significant interaction was found between stage and prescribed burning (H = 39.7, p < 0.001). Bacterial communities separated mainly along stage by all four beta diversity metrics used (Bray Curtis, Jaccard, and Weighted and Unweighted UniFrac), with the main difference observed along the primary axis (weighted UniFrac, 48 %). Bacterial phyla were differentially abundant in older soil stages compared to beach (ANCOM-BC, q < 0.05); likewise, differential abundances in genera were evident when burned and unburned sites were compared. A Mantel test indicated stronger congruency between the bacterial communities and soil chemistry than between bacterial communities and vegetation. Collectively, soil chemical and microbial parameters along with management practices contribute to dunal successional patterns in the Great Lakes.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 5","pages":"Article 102611"},"PeriodicalIF":2.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145242349","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}
Lorelle A. Meadows , Ethan Theuerkauf , Cary Troy , Pengfei Xue , Guy Meadows , Chin Wu
{"title":"Dynamic coasts, resilient futures: Navigating changes in the Great Lakes – Foreword to the special section","authors":"Lorelle A. Meadows , Ethan Theuerkauf , Cary Troy , Pengfei Xue , Guy Meadows , Chin Wu","doi":"10.1016/j.jglr.2025.102618","DOIUrl":"10.1016/j.jglr.2025.102618","url":null,"abstract":"<div><div>Historically, research on coastal processes has largely been concentrated on oceanic environments which have much in common with the Great Lakes but also differ in significant ways. This is particularly true with respect to substantial and lasting water level fluctuations that occur on seasonal and decadal time scales that differ temporally from shorter term tidal fluctuations and greatly exceed long-term oceanic sea level rise. Since the late 1990s, the Great Lakes basin has experienced record-breaking high and low water levels as well as more frequent and intense storms. This combination of factors has led to changes to these nearshore environments and stimulated new and exciting coastal research characterizing and quantifying these changes and offering new insights into Great Lakes coastal processes. Studies in this special section address these unique coastal landscapes shaped by both natural forces (e.g., ice dynamics, waves, and fluctuating lake levels) and human influences (armoring, coastal structures, sediment nourishment, and policy interventions). The findings shared in this collection provide actionable knowledge for anticipating change, mitigating risk, and building long-term resilience while calling for adaptive management frameworks to foster proactive, equitable stewardship of the Great Lakes shorelines.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 4","pages":"Article 102618"},"PeriodicalIF":2.4,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687473","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":"Coastal geomorphic changes near groin structures under fluctuating water levels in Lake Michigan","authors":"Sarah M. Peterson , Chin H. Wu","doi":"10.1016/j.jglr.2025.102622","DOIUrl":"10.1016/j.jglr.2025.102622","url":null,"abstract":"<div><div>Coastal geomorphic changes near groins under fluctuating water levels are important for environmental management, hazard mitigation, and socioeconomics. In this study, geomorphic changes of shorelines, beaches, and bluffs were examined within a groin field and two pocket beaches on a high bluff coast in Lake Michigan (at Sheridan Park, Wisconsin), and compared under low, mean, and high lake levels. Distinct geomorphic responses were observed. In the pocket beaches, shorelines were crenulate-shaped and responded fairly linearly with fluctuating lake levels. In comparison, shorelines in the groin field tended to be straight during high lake levels and curved (cusp and saw-toothed) at low lake levels and changed nonlinearly, with abrupt retreat from mean to high lake levels. Beaches were typically wider within the groin field than the pocket beaches when lake levels were low; however, the opposite was found during high water levels, suggesting decreased effectiveness of the groin field at maintaining beach integrity during high water. Increased sediment supply from eroding bluffs likely contributed to wider pocket beaches during high lake levels. Bluff toe retreat was observed in the pocket beaches during high water levels but was not apparent within the groin field. Accelerated bluff recession was observed downdrift of the terminal groin, as has been reported on Lake Michigan and oceanic coasts but not along the regularly nourished pocket beaches of Chicago. Overall, distinct geomorphic changes near groins unique to a high bluff coast under fluctuating water levels were revealed. These insights can help inform coastal management and decision-making in the Great Lakes.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 4","pages":"Article 102622"},"PeriodicalIF":2.4,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687534","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}
Rose E. Stuart, Hannah L. Holst, J. Ellen Marsden, Jason D. Stockwell
{"title":"Distribution of American eels (Anguilla rostrata) and the influence of barriers in the Lake Champlain basin","authors":"Rose E. Stuart, Hannah L. Holst, J. Ellen Marsden, Jason D. Stockwell","doi":"10.1016/j.jglr.2025.102617","DOIUrl":"10.1016/j.jglr.2025.102617","url":null,"abstract":"<div><div>Freshwater eels (<em>Anguilla</em> spp.) are experiencing significant population declines, particularly for species from temperate latitudes. These declines are attributed to overharvest, habitat degradation, and migration barriers such as dams. However, lack of information about eel distribution, habitat use, and ability to navigate in-stream barriers increases the challenge of managing eels. We investigated the distribution and abundance of eels in the Lake Champlain basin, where 2.7 million glass eels were stocked from 2005 to 2010, and focused on the influence of barriers pre- and post-stocking. Data were collated from a range of sources, from 1929 to 2024. Eels were recorded throughout Lake Champlain and its tributaries, including down to 90-m depth in the lake and distances up to 40 km upstream from the lake. Eels were rarely observed upstream of dams >10 m, and observations were reduced upstream of multiple dams, regardless of dam height. Stocked eels may be expanding the overall distribution of eels in the basin, with post-stocking observations from locations typically considered ‘impassable’. Inconsistency in data collection over space and time has left gaps in our understanding of eel distributions and creates uncertainty regarding accuracy of observed eel absences, issues which could be improved by future survey work. Our findings from the Lake Champlain basin can likely be extrapolated to the larger St Lawrence River basin, where stocking has also occurred, to identify research and management needs regarding the impacts of small dams in minor tributaries and large dams in major rivers.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 4","pages":"Article 102617"},"PeriodicalIF":2.4,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687609","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}
Gregory J. Dick , Mike Shriberg , Mary Ogdahl , Karen M. Alofs , Bopaiah A. Biddanda , Hunter Carrick , Patrick J. Doran , Aaron T. Fisk , Stuart E. Jones , Rebecca Klaper , Dennis McCauley , Ashley Moerke , Rebecca Meuninck , Catherine M. O’Reilly , Jonathan T. Overpeck , Mantha S. Phanikumar , Lars G. Rudstam
{"title":"Investing in Great Lakes Science is critical for safety and prosperity","authors":"Gregory J. Dick , Mike Shriberg , Mary Ogdahl , Karen M. Alofs , Bopaiah A. Biddanda , Hunter Carrick , Patrick J. Doran , Aaron T. Fisk , Stuart E. Jones , Rebecca Klaper , Dennis McCauley , Ashley Moerke , Rebecca Meuninck , Catherine M. O’Reilly , Jonathan T. Overpeck , Mantha S. Phanikumar , Lars G. Rudstam","doi":"10.1016/j.jglr.2025.102614","DOIUrl":"10.1016/j.jglr.2025.102614","url":null,"abstract":"<div><div>Scientific research plays a crucial role in supporting the safety and prosperity of tens of millions of people who live, work, and recreate in the Laurentian Great Lakes. Cuts to US federal funding, programs, and agencies threaten this research enterprise. As scientists and collaborators at the Cooperative Institute for Great Lakes Research, we make the case for the value of Great Lakes research in terms of human health and safety, economic prosperity, and society’s capacity to confront major challenges today and in the future. The successful track record of scientific research in the Great Lakes shows that it provides return on investment by protecting and restoring the ecosystem, supporting human well-being, and stimulating a thriving economy. Without this continued investment, the future of the Great Lakes and those depending on them is in peril.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 4","pages":"Article 102614"},"PeriodicalIF":2.4,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687529","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}
Sophia LaFond-Hudson , Matthew A. Pronschinske , Sarah M. Elliott , Steven R. Corsi
{"title":"Prevalence and potential for biological effects of several chemicals of interest in Lake Superior tributaries","authors":"Sophia LaFond-Hudson , Matthew A. Pronschinske , Sarah M. Elliott , Steven R. Corsi","doi":"10.1016/j.jglr.2025.102608","DOIUrl":"10.1016/j.jglr.2025.102608","url":null,"abstract":"<div><div>Lake Superior is typically assumed to have excellent water quality, but its tributaries have been understudied for contaminants relative to other Great Lakes. This study monitored polycyclic aromatic hydrocarbons (PAHs), alkylphenols (AP) and alkylphenol ethoxylates (APEs), bisphenols, and neonicotinoid pesticides in 18 sites on 17 United States tributaries to Lake Superior in 2022. Contaminants were analyzed from 54 surface water and 17 stream bed sediment samples. PAHs were the most prevalent contaminant class. Among 17 PAHs in 17 samples (289 instances), 71<!--> <!-->% were positive detections. Surface water samples were not analyzed for PAHs. Next, among 4 APs and APEs analyzed, 35<!--> <!-->% of sediment sample instances and 21<!--> <!-->% of instances in 54 water samples were positive detections. Bisphenol analogues were detected in 2<!--> <!-->% of sediment sample instances and 4<!--> <!-->% of water sample instances. Bisphenol A (BPA) was not quantified due to field blank contamination, but bisphenol AF (BPAF), bisphenol E (BPE), bisphenol F (BPF), and bisphenol S (BPS) were detected in environmental samples. Neonicotinoids were detected in 0.5<!--> <!-->% of sediment sample instances and 0.4% of water samples instances. Low detection frequencies for contaminants precluded analyses with watershed land use characteristics, but four sites (Tischer Creek, Miller Creek, Carp River and Iron River) emerged as locations with relatively elevated contaminant concentrations. Comparison of concentrations with ToxCast and other water quality guidelines suggested potential for biological effects from some samples. This study provides a baseline of low contaminant prevalence in Lake Superior tributaries while identifying a few locations that may warrant further monitoring.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 4","pages":"Article 102608"},"PeriodicalIF":2.4,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687602","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}
Jessica Hanson , Morgann Gordon , Nick Peterson , Ryan Lepak , Cory Goldsworthy , Valerie Brady , Thomas Hrabik , Joel Hoffman
{"title":"Stable isotope analysis of western Lake Superior predatory fishes, part two: prey source contributions","authors":"Jessica Hanson , Morgann Gordon , Nick Peterson , Ryan Lepak , Cory Goldsworthy , Valerie Brady , Thomas Hrabik , Joel Hoffman","doi":"10.1016/j.jglr.2025.102615","DOIUrl":"10.1016/j.jglr.2025.102615","url":null,"abstract":"<div><div>Niche partitioning of time, space, or resources facilitates the coexistence of competitor species. The Lake Superior food web includes several piscivores that are important to fisheries, including native lake trout (<em>Salvelinus namaycush,</em> both lean and siscowet morphotypes) and walleye (<em>Sander vitreus</em>), and introduced Chinook salmon (<em>Oncorhynchus tshawytscha</em>), coho salmon (<em>Oncorhynchus kisutch</em>), pink salmon (<em>Oncorhynchus gorbuscha</em>), brown trout (<em>Salmo trutta</em>), and rainbow trout (<em>Oncorhynchus mykiss</em>). Here we quantify specific prey source contributions to these predators in the western arm of Lake Superior using dual stable isotope mixing models based on carbon and nitrogen stable isotope ratios. For each species, three mixing models were constructed to examine predator size effect: one with all fish sampled, one with the 10 smallest fish sampled, and one with the 10 largest fish sampled. We found that native and introduced species had distinct diets from one another; siscowet lake trout primarily relied on burbot (<em>Lota lota</em>) and invasive rainbow smelt (<em>Osmerus mordax</em>), native lean lake trout and walleye both relied on invasive rainbow smelt, and introduced salmonids relied on native invertebrates <em>Mysis diluviana</em> and <em>Diporeia</em> spp. Additionally, siscowet lake trout, lean lake trout, Chinook salmon, and coho salmon exhibited size-based shifts in prey contributions. The low piscivory in introduced salmonids and high reliance of native predators on invasive rainbow smelt is likely due to low abundance of cisco (<em>Coregonus artedi</em>). Our study reveals complex, potentially adaptive responses of both native and introduced nearshore predators to both native and invasive prey resources in Lake Superior.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 4","pages":"Article 102615"},"PeriodicalIF":2.4,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687608","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}