Journal of Great Lakes Research最新文献

Two-year follow-up on an environmental health literacy software intervention for Anishinaabe Native Americans

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-03-01 DOI: 10.1016/j.jglr.2025.102543

Matthew J. Dellinger , Sarah Reed-Thryselius , Beth Sieloff , Sarah Keller , Alexis Visotcky , Thomas Chelius , Otto Wichmann

Fish consumption comprises an important part of what the Anishinaabe (Great Lakes Native Americans) call “minobimaadiziiwin” which translates roughly to “living in a good way.” Industrial activity leading to the accumulation of persistent contaminants in fish disrupts minobimaadiziiwin. Our team of academic and Anishinaabe scientists co-developed a fish consumption advisory for the Anishinaabe using software that can be accessed via mobile phones and the internet. The software, Gigiigoo’inaan (“our fish”) is designed to improve environmental health literacy using culturally congruent messaging and aesthetics. In 2021, we conducted a randomized control trial to test changes in environmental health literacy including fish consumption behaviors. The software was determined to improve confidence whilst maintaining contaminant intakes within advisory (i.e., “safe”) limits. In 2022 and 2023, we updated the software and conducted user follow-up surveys using email recruitment captured by the software on personal devices. During the 2022 follow-up of software users, 90 respondents indicated significant increases of engagement (80.9%), utility (88.8%), and confidence (91.1%) relative to the original control trial. During the 2023 follow-up, after the additional update, those gains increased even further: engagement (98.4%), utility (97.3%), and confidence (97.3%). Iterations of community-engaged software development was associated with improved environmental health literacy metrics across software updates.

{"title":"Two-year follow-up on an environmental health literacy software intervention for Anishinaabe Native Americans","authors":"Matthew J. Dellinger , Sarah Reed-Thryselius , Beth Sieloff , Sarah Keller , Alexis Visotcky , Thomas Chelius , Otto Wichmann","doi":"10.1016/j.jglr.2025.102543","DOIUrl":"10.1016/j.jglr.2025.102543","url":null,"abstract":"<div><div>Fish consumption comprises an important part of what the Anishinaabe (Great Lakes Native Americans) call “<em>minobimaadiziiwin</em>” which translates roughly to “living in a good way.” Industrial activity leading to the accumulation of persistent contaminants in fish disrupts <em>minobimaadiziiwin</em>. Our team of academic and Anishinaabe scientists co-developed a fish consumption advisory for the Anishinaabe using software that can be accessed via mobile phones and the internet. The software, Gigiigoo’inaan (“our fish”) is designed to improve environmental health literacy using culturally congruent messaging and aesthetics. In 2021, we conducted a randomized control trial to test changes in environmental health literacy including fish consumption behaviors. The software was determined to improve confidence whilst maintaining contaminant intakes within advisory (i.e., “safe”) limits. In 2022 and 2023, we updated the software and conducted user follow-up surveys using email recruitment captured by the software on personal devices. During the 2022 follow-up of software users, 90 respondents indicated significant increases of engagement (80.9%), utility (88.8%), and confidence (91.1%) relative to the original control trial. During the 2023 follow-up, after the additional update, those gains increased even further: engagement (98.4%), utility (97.3%), and confidence (97.3%). Iterations of community-engaged software development was associated with improved environmental health literacy metrics across software updates.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102543"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631811","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}

引用次数: 0

New method for identification of natural and anthropogenic organic matter in receiving waters of pulp and paper mill discharge

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-02-24 DOI: 10.1016/j.jglr.2025.102541

Maria Zobkova, Natalia Galakhina, Mikhail Zobkov

Pulp and paper mills (PPMs) are one of the most water-intensive industries in the world. Where sulphite pulping is used to produce pulp for paper and other products, lignosulfonates (LSF) dominate the organic component of PPM wastewaters. Currently, there is no information about the quantitative composition of organic matter (OM) and contribution of LSF to the OM pool in lakes and rivers located within the zone of PPMs’ influence. Addressing this gap in our understanding, a method was developed for the characterization of allochthonous (humic substances, HS) and anthropogenic (LSF) components of OM, and labile organic substances. The method is based on the extraction of HS from a water sample with DEAE-cellulose, introducing an experimentally determined adjustment coefficient for partial LSF sorption. The method was applied to the second largest freshwater lake in Europe, Lake Onego (also known as Onega), and its Kondopoga Bay, receiving wastewaters of Kondopoga PPM. The method’s effectiveness was demonstrated through spatial segregation of the river and wastewaters in the bay in different seasons, first as a source of HS, and the second as a source of LSF. The vertical distribution of the river and wastewaters was indicated using conductivity, temperature, and TP. The proposed method demonstrated that HS in Kondopoga Bay make up on average 63% of the total OM pool and 17% of labile OM. However, LSF accounts for an average of 20% and up to 39% of the total OM pool, which confirms the high degree of anthropogenic impact on water quality of the bay.

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引用次数: 0

First evidence of lake trout Salvelinus namaycush spawning aggregation in Ohio waters of Lake Erie following reintroduction

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-02-22 DOI: 10.1016/j.jglr.2025.102540

Benjamin J. Spitz , Graham F. Montague , Joseph D. Schmitt , Francesco Guzzo , Peter I. Jenkins

Lake trout Salvelinus namaycush, an important apex predator native to Lake Erie, were extirpated by 1965 due to overexploitation, introduction of invasive species, and habitat degradation. Cooperative lake-wide lake trout stocking has been ongoing since 1982, with stocking strategies adapting as research identifies the age at stocking, locations, and strains that optimize the recovery of lake trout. Despite these efforts, limited evidence of lake trout spawning has been documented in the western half of Lake Erie. On 20 November 2023, n = 99 lake trout were captured via gillnet in Fairport Harbor, Ohio. This sample consisted largely of ripe adults (79.4 %) that were likely spawning within the vicinity of Fairport Harbor. Coded wire tags recovered from these fish revealed that most of these lake trout had been stocked in Fairport Harbor (99.0 %), were of the Seneca Lake strain (92.7 %), and were stocked as age-1 fish (93.7 %). This study demonstrates the survival of fish from Fairport Harbor stockings, suggests evidence of stocking-site fidelity, supports the stocking of the Seneca Lake strain, and suggests that stocking age-1 lake trout may have advantages over younger life stages. Most importantly, this study demonstrates that lake trout are likely spawning near Fairport Harbor. These findings can guide future studies that identify lake trout spawning habitat, recruitment bottlenecks, movement, and stocking-site fidelity in Lake Erie and can be used to inform future recovery strategies.

{"title":"First evidence of lake trout Salvelinus namaycush spawning aggregation in Ohio waters of Lake Erie following reintroduction","authors":"Benjamin J. Spitz , Graham F. Montague , Joseph D. Schmitt , Francesco Guzzo , Peter I. Jenkins","doi":"10.1016/j.jglr.2025.102540","DOIUrl":"10.1016/j.jglr.2025.102540","url":null,"abstract":"<div><div>Lake trout <em>Salvelinus namaycush,</em> an important apex predator native to Lake Erie, were extirpated by 1965 due to overexploitation, introduction of invasive species, and habitat degradation. Cooperative lake-wide lake trout stocking has been ongoing since 1982, with stocking strategies adapting as research identifies the age at stocking, locations, and strains that optimize the recovery of lake trout. Despite these efforts, limited evidence of lake trout spawning has been documented in the western half of Lake Erie. On 20 November 2023, n = 99 lake trout were captured via gillnet in Fairport Harbor, Ohio. This sample consisted largely of ripe adults (79.4 %) that were likely spawning within the vicinity of Fairport Harbor. Coded wire tags recovered from these fish revealed that most of these lake trout had been stocked in Fairport Harbor (99.0 %), were of the Seneca Lake strain (92.7 %), and were stocked as age-1 fish (93.7 %). This study demonstrates the survival of fish from Fairport Harbor stockings, suggests evidence of stocking-site fidelity, supports the stocking of the Seneca Lake strain, and suggests that stocking age-1 lake trout may have advantages over younger life stages. Most importantly, this study demonstrates that lake trout are likely spawning near Fairport Harbor. These findings can guide future studies that identify lake trout spawning habitat, recruitment bottlenecks, movement, and stocking-site fidelity in Lake Erie and can be used to inform future recovery strategies.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102540"},"PeriodicalIF":2.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631818","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}

引用次数: 0

Multiple stressors influencing the lakebed ecology of nearshore eastern Georgian Bay

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-02-20 DOI: 10.1016/j.jglr.2025.102542

E. Todd Howell , K. Stevack

Spanning two contrasting geological landforms, the heterogeneous landscape of eastern Georgian Bay comprises an archipelago of embayments, channels, and reefs that support a diverse benthic macroinvertebrate community. The exposed bedrock of the outer coastline contrasts with the mostly depositional silts of the inner coastline embayments bordering the Canadian Shield. Abundance of benthic algae and composition of benthic invertebrates were sampled over four regions and 50 km of coastline from Severn Sound to Shawanaga Island from 2014 to 2015, to assess where invasive dreissenid mussels and anthropogenic activity are impacting water quality or habitat conditions. Low surface cover and biomass of Dreissena, an absence of benthic macro-algae, and the lack of relationship between mussel occurrence and periphyton chlorophyll a on hard substrate of the more calcium-rich waters of the outer nearshore where dreissenids are found, suggests little effect of mussels on lakebed bio-physical structure. Further inshore, where dreissenids are largely absent, composition of benthic invertebrates in depositional sediments was influenced by physical makeup of substrate and the ubiquitous gradient in water quality from inshore to offshore associated with mixing of the drainage from watersheds on the Canadian Shield into the Lake Huron basin. Round goby (Neogobius melanostomus) was widely distributed over the outer coastline where visual sampling was conducted over hard substrate. The composition of oligochaetes on soft sediment is suggestive of anthropogenic enrichment at some sites. Collectively, the inherent physical–chemical habitat variability of the coastline accounts for much of the variability in the benthos.

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引用次数: 0

Hydrologic connections in Apostle Islands coastal wetlands: Exploring dynamics and resilience to Lake Superior water level fluctuations

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-02-14 DOI: 10.1016/j.jglr.2025.102538

Olivia C. Anderson, Sarah E. Johnson, Shea Schachameyer, Shelly L. Ray, Matthew J. Cooper

Coastal wetlands within Apostle Islands National Lakeshore (APIS) represent important reference ecosystems for Lake Superior given their relatively undegraded condition. However, this region lacks climate change-relevant nearshore bathymetric information for coastal wetlands, a gap our study helps fill. Since 2010, the Great Lakes, including Lake Superior, have experienced both extended low water levels and extreme highs. Such extremes are anticipated to increase in frequency and duration, but the exact outcomes are uncertain. Therefore, it is important to explore the resiliency of APIS wetlands against different water level scenarios. We studied seven wetlands with different geomorphic connections to Lake Superior (open, transient, or semi-permanent) and gathered water level and depth data. Using depth measurements, we created topo-bathymetric maps to investigate inundation patterns for various scenarios of Lake Superior water levels. Comparing wetland water levels to those of Lake Superior we found that water level patterns were unique per connection type, but that Lake Superior maintained baseline-water levels for all sites. Additionally, the wetlands we sampled demonstrated resiliency to substantial changes in water levels thanks to both bathymetry deeper than record low Lake Superior levels and sufficient undisturbed upslope habitats. However, the biotic communities within could shift in composition depending on future water level regimes. The increasing magnitude and frequency of Great Lakes water level fluctuations induced by climate change will influence all APIS coastal wetlands, regardless of connection type.

{"title":"Hydrologic connections in Apostle Islands coastal wetlands: Exploring dynamics and resilience to Lake Superior water level fluctuations","authors":"Olivia C. Anderson, Sarah E. Johnson, Shea Schachameyer, Shelly L. Ray, Matthew J. Cooper","doi":"10.1016/j.jglr.2025.102538","DOIUrl":"10.1016/j.jglr.2025.102538","url":null,"abstract":"<div><div>Coastal wetlands within Apostle Islands National Lakeshore (APIS) represent important reference ecosystems for Lake Superior given their relatively undegraded condition. However, this region lacks climate change-relevant nearshore bathymetric information for coastal wetlands, a gap our study helps fill. Since 2010, the Great Lakes, including Lake Superior, have experienced both extended low water levels and extreme highs. Such extremes are anticipated to increase in frequency and duration, but the exact outcomes are uncertain. Therefore, it is important to explore the resiliency of APIS wetlands against different water level scenarios. We studied seven wetlands with different geomorphic connections to Lake Superior (open, transient, or semi-permanent) and gathered water level and depth data. Using depth measurements, we created topo-bathymetric maps to investigate inundation patterns for various scenarios of Lake Superior water levels. Comparing wetland water levels to those of Lake Superior we found that water level patterns were unique per connection type, but that Lake Superior maintained baseline-water levels for all sites. Additionally, the wetlands we sampled demonstrated resiliency to substantial changes in water levels thanks to both bathymetry deeper than record low Lake Superior levels and sufficient undisturbed upslope habitats. However, the biotic communities within could shift in composition depending on future water level regimes. The increasing magnitude and frequency of Great Lakes water level fluctuations induced by climate change will influence all APIS coastal wetlands, regardless of connection type.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102538"},"PeriodicalIF":2.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631821","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}

引用次数: 0

Long-term trends in particulate nutrients in offshore waters of the Laurentian Great Lakes

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-02-14 DOI: 10.1016/j.jglr.2025.102539

Erica P. Yang , Anne M. Scofield , Matthew B. Pawlowski

The Laurentian Great Lakes have undergone significant ecological changes in recent decades. We characterized patterns and long-term trends in particulate nutrient concentrations and seston stoichiometry from 1997 to 2019 across all five Great Lakes using spring and summer particulate nutrient data routinely collected by the US EPA GLNPO Water Quality Monitoring Program. We observed broad differences between the upper and lower Great Lakes, likely driven by varying surrounding land use, nutrient dynamics, light and hydrological regimes, and internal processes. Lakes Huron and Michigan exhibited the most significant changes in particulate nutrient concentrations throughout the study period. Despite changes in particulate nutrient concentrations, no significant trends in seston stoichiometric ratios were observed in any of the lakes. We identified two periods of abrupt change (mid-2000s and 2012) in the particulate nutrient time series. The first period of change was characterized by significant declines in total suspended solids, particulate phosphorus, and particulate organic carbon concentrations, concurrent with the timing of documented lower food web changes in Lakes Huron and Michigan but preceding the period of rapid quagga mussel expansion into the Great Lakes. Since 2012, particulate nitrogen has abruptly increased in all lakes, resulting in increasingly imbalanced seston N:P and C:N. These shifts may have broader ecological implications, potentially affecting organisms higher up the food web through altered nutrient availability and balance. Tracking particulate nutrients will continue to be critical for lake management.

{"title":"Long-term trends in particulate nutrients in offshore waters of the Laurentian Great Lakes","authors":"Erica P. Yang , Anne M. Scofield , Matthew B. Pawlowski","doi":"10.1016/j.jglr.2025.102539","DOIUrl":"10.1016/j.jglr.2025.102539","url":null,"abstract":"<div><div>The Laurentian Great Lakes have undergone significant ecological changes in recent decades. We characterized patterns and long-term trends in particulate nutrient concentrations and seston stoichiometry from 1997 to 2019 across all five Great Lakes using spring and summer particulate nutrient data routinely collected by the US EPA GLNPO Water Quality Monitoring Program. We observed broad differences between the upper and lower Great Lakes, likely driven by varying surrounding land use, nutrient dynamics, light and hydrological regimes, and internal processes. Lakes Huron and Michigan exhibited the most significant changes in particulate nutrient concentrations throughout the study period. Despite changes in particulate nutrient concentrations, no significant trends in seston stoichiometric ratios were observed in any of the lakes. We identified two periods of abrupt change (mid-2000s and 2012) in the particulate nutrient time series. The first period of change was characterized by significant declines in total suspended solids, particulate phosphorus, and particulate organic carbon concentrations, concurrent with the timing of documented lower food web changes in Lakes Huron and Michigan but preceding the period of rapid quagga mussel expansion into the Great Lakes. Since 2012, particulate nitrogen has abruptly increased in all lakes, resulting in increasingly imbalanced seston N:P and C:N. These shifts may have broader ecological implications, potentially affecting organisms higher up the food web through altered nutrient availability and balance. Tracking particulate nutrients will continue to be critical for lake management.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102539"},"PeriodicalIF":2.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631887","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}

引用次数: 0

Genetic characterization and interspecies gene flow among the Oreochromis species in the Lake Victoria and Kyoga basins, Uganda: Implications for conservation

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-02-14 DOI: 10.1016/j.jglr.2025.102535

Gerald Kwikiriza , Papius Dias Tibihika , Ivan Abaho , Juliet Kigongo Nattabi , Thapasya Vijayan , Christina Rupprecht , Manuel Curto , Andreas Melcher , Harald Meimberg

Despite the significant fishery contribution of the Victoria and Kyoga basins, the ecosystems have continuously been threatened by overfishing and introduction of alien species, among others. These activities have contributed to a significant decline of the native tilapiines, the Singida tilapia (Oreochromis esculentus) and Victoria tilapia (Oreochromis variabilis). As a consequence, the native species have been relegated to smaller satellite lakes and replaced by non-native species comprising Nile tilapia (O. niloticus) and blue spotted tilapia (O. leucostictus). Therefore, to better understand the implications of these events, it is important to assess the status of both native and non-native species in the Victoria and Kyoga basins for sustainable science-based informed management options. Utilizing both microsatellite and mitochondrial (mt) DNA markers, we sequenced a total of 739 individuals from the Victoria and Kyoga basins comprising O. niloticus (333), O. esculentus (151), and O. leucostictus (258). Generally, all the species and their respective populations exhibited lower genetic diversity as well as genetic differentiation. The principal coordinate analysis showed three main distinct groups corresponding to the three species studied highlighting their genetic differentiation. However, some evidence of introgressive hybridization observed between O. niloticus and O. esculentus as well as O. esculentus and O. leucostictus suggests a need for a tailored management strategy to preserve the genetic integrity of all three Oreochromis species while minimizing the hybridization risks. The study recommends that the satellite waterbodies containing pure stocks of O. esculentus should be conserved separately with higher priority.

{"title":"Genetic characterization and interspecies gene flow among the Oreochromis species in the Lake Victoria and Kyoga basins, Uganda: Implications for conservation","authors":"Gerald Kwikiriza , Papius Dias Tibihika , Ivan Abaho , Juliet Kigongo Nattabi , Thapasya Vijayan , Christina Rupprecht , Manuel Curto , Andreas Melcher , Harald Meimberg","doi":"10.1016/j.jglr.2025.102535","DOIUrl":"10.1016/j.jglr.2025.102535","url":null,"abstract":"<div><div>Despite the significant fishery contribution of the Victoria and Kyoga basins, the ecosystems have continuously been threatened by overfishing and introduction of alien species, among others. These activities have contributed to a significant decline of the native tilapiines, the Singida tilapia (<em>Oreochromis esculentus</em>) and Victoria tilapia (<em>Oreochromis variabilis</em>)<em>.</em> As a consequence, the native species have been relegated to smaller satellite lakes and replaced by non-native species comprising Nile tilapia (<em>O</em>. <em>niloticus</em>) and blue spotted tilapia (<em>O. leucostictus</em>)<em>.</em> Therefore, to better understand the implications of these events, it is important to assess the status of both native and non-native species in the Victoria and Kyoga basins for sustainable science-based informed management options. Utilizing both microsatellite and mitochondrial (mt) DNA markers, we sequenced a total of 739 individuals from the Victoria and Kyoga basins comprising <em>O. niloticus</em> (333), <em>O. esculentus</em> (151)<em>,</em> and <em>O. leucostictus</em> (258). Generally, all the species and their respective populations exhibited lower genetic diversity as well as genetic differentiation. The principal coordinate analysis showed three main distinct groups corresponding to the three species studied highlighting their genetic differentiation. However, some evidence of introgressive hybridization observed between <em>O. niloticus</em> and <em>O. esculentus</em> as well as <em>O. esculentus</em> and <em>O. leucostictus</em> suggests a need for a tailored management strategy to preserve the genetic integrity of all three <em>Oreochromis</em> species while minimizing the hybridization risks. The study recommends that the satellite waterbodies containing pure stocks of <em>O. esculentus</em> should be conserved separately with higher priority.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102535"},"PeriodicalIF":2.4,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

The lampricide 3-trifluoromethyl-4-nitrophenol (TFM) stimulates oxygen consumption by larval sea lamprey in a dose-dependent manner

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-02-08 DOI: 10.1016/j.jglr.2025.102536

Leonard D’Souza , Hugo Flávio , Michael P. Wilkie

Sea lamprey (Petromyzon marinus) are an invasive species in the Laurentian Great Lakes, where parasitism by blood-feeding juvenile lampreys greatly reduced populations of economically and culturally important native fishes in the early-mid 1900s. To control sea lamprey populations, the lampricide 3-trifluoromethyl-4-nitrophenol (TFM) is added to streams infested with larval sea lamprey. Sea lamprey have a lower capacity to detoxify TFM than most non-target fishes, making it a highly effective pesticide. TFM decreases ATP production by disrupting oxidative phosphorylation in the mitochondria, leading to an increase in mitochondrial oxygen consumption. However, little is known about how TFM affects whole animal oxygen consumption in sea lamprey and other fishes. To test the hypothesis that TFM has dose-dependent effects on larval sea lamprey metabolic rate, we measured the mass-specific oxygen consumption rates (

Ṁ_{O_{2}}

) of larval sea lamprey using intermittent-flow respirometry during TFM exposure. Exposure to increasing concentrations of TFM led to stepwise increases in

Ṁ_{O_{2}}

in larval sea lamprey, resulting in death after

Ṁ_{O_{2}}

reached levels equivalent to their known maximum metabolic rates. Similar measurements of

Ṁ_{O_{2}}

could be used to determine the relative TFM sensitivity of non-target species to better assess the potential impacts of TFM on resident fisheries.

{"title":"The lampricide 3-trifluoromethyl-4-nitrophenol (TFM) stimulates oxygen consumption by larval sea lamprey in a dose-dependent manner","authors":"Leonard D’Souza , Hugo Flávio , Michael P. Wilkie","doi":"10.1016/j.jglr.2025.102536","DOIUrl":"10.1016/j.jglr.2025.102536","url":null,"abstract":"<div><div>Sea lamprey (<em>Petromyzon marinus</em>) are an invasive species in the Laurentian Great Lakes, where parasitism by blood-feeding juvenile lampreys greatly reduced populations of economically and culturally important native fishes in the early-mid 1900s. To control sea lamprey populations, the lampricide 3-trifluoromethyl-4-nitrophenol (TFM) is added to streams infested with larval sea lamprey. Sea lamprey have a lower capacity to detoxify TFM than most non-target fishes, making it a highly effective pesticide. TFM decreases ATP production by disrupting oxidative phosphorylation in the mitochondria, leading to an increase in mitochondrial oxygen consumption. However, little is known about how TFM affects whole animal oxygen consumption in sea lamprey and other fishes. To test the hypothesis that TFM has dose-dependent effects on larval sea lamprey metabolic rate, we measured the mass-specific oxygen consumption rates (<span><math><msub><mi>Ṁ</mi><msub><mi>O</mi><mn>2</mn></msub></msub></math></span>) of larval sea lamprey using intermittent-flow respirometry during TFM exposure. Exposure to increasing concentrations of TFM led to stepwise increases in <span><math><msub><mi>Ṁ</mi><msub><mi>O</mi><mn>2</mn></msub></msub></math></span> in larval sea lamprey, resulting in death after <span><math><msub><mi>Ṁ</mi><msub><mi>O</mi><mn>2</mn></msub></msub></math></span> reached levels equivalent to their known maximum metabolic rates. Similar measurements of <span><math><msub><mi>Ṁ</mi><msub><mi>O</mi><mn>2</mn></msub></msub></math></span> could be used to determine the relative TFM sensitivity of non-target species to better assess the potential impacts of TFM on resident fisheries.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102536"},"PeriodicalIF":2.4,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

A comparison of phytoplankton development in Lake Baikal, Siberia, and Rybinsk Reservoir, Volga River, European Russia, using stability indices

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-02-01 DOI: 10.1016/j.jglr.2024.102493

Natalya Mineeva , Nina Bondarenko

Based on observations of 2009–2022, the state of phytoplankton and its main taxa was analyzed in Lake Baikal (Siberia, Russia) and Rybinsk Reservoir (European Russia), two large freshwater lake reservoirs. Data were collected during periods of phytoplankton seasonal maxima which determine the total level of their annual production. The development of phytoplankton was assessed by biomass expressed in units of wet weight for Lake Baikal and units of chlorophyll a for the Rybinsk Reservoir. To assess the sustainability of biomass, its coefficients of variation, deviation from the mean value, and population stability index were calculated. These metrics did not reveal any definite inter-annual trends in the state of phytoplankton, but showed sharp changes in the level of community resistance in years with different trophic state. In both water bodies, a decrease in stability was observed under conditions atypical for the ecosystem. In the oligotrophic Lake Baikal, the most unstable situation was noted in highly productive years with the mass development of diatoms in the spring plankton. In the moderately eutrophic Rybinsk Reservoir, its resistance decreased in low productivity years with a weak summer development of phytoplankton and cyanobacteria due to the unfavorable weather conditions. The proposed approach will be of interest for assessing the stability of other aquatic ecosystems.

{"title":"A comparison of phytoplankton development in Lake Baikal, Siberia, and Rybinsk Reservoir, Volga River, European Russia, using stability indices","authors":"Natalya Mineeva , Nina Bondarenko","doi":"10.1016/j.jglr.2024.102493","DOIUrl":"10.1016/j.jglr.2024.102493","url":null,"abstract":"<div><div>Based on observations of 2009–2022, the state of phytoplankton and its main taxa was analyzed in Lake Baikal (Siberia, Russia) and Rybinsk Reservoir (European Russia), two large freshwater lake reservoirs. Data were collected during periods of phytoplankton seasonal maxima which determine the total level of their annual production. The development of phytoplankton was assessed by biomass expressed in units of wet weight for Lake Baikal and units of chlorophyll <em>a</em> for the Rybinsk Reservoir. To assess the sustainability of biomass, its coefficients of variation, deviation from the mean value, and population stability index were calculated. These metrics did not reveal any definite inter-annual trends in the state of phytoplankton, but showed sharp changes in the level of community resistance in years with different trophic state. In both water bodies, a decrease in stability was observed under conditions atypical for the ecosystem. In the oligotrophic Lake Baikal, the most unstable situation was noted in highly productive years with the mass development of diatoms in the spring plankton. In the moderately eutrophic Rybinsk Reservoir, its resistance decreased in low productivity years with a weak summer development of phytoplankton and cyanobacteria due to the unfavorable weather conditions. The proposed approach will be of interest for assessing the stability of other aquatic ecosystems.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 1","pages":"Article 102493"},"PeriodicalIF":2.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143129449","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}

引用次数: 0

Role of tributary cyanobacterial and nutrient transport and sediment processes on cyanobacterial bloom initiation in Lake Superior nearshore

IF 2.4 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-02-01 DOI: 10.1016/j.jglr.2024.102409

Rebecca M. Kreiling , Carrie E. Givens , Anna C. Baker , Richard L. Kiesling , Eric D. Dantoin , Patrik M. Perner , Shelby P. Sterner , Kenna J. Gierke , Paul C. Reneau

Watershed fluxes of suspended sediment (SS), nutrients, in particular phosphorus (P), and cyanobacteria may play a role in driving cyanobacterial blooms along the southwestern shore of oligotrophic Lake Superior. To understand how tributary loads contribute to nearshore blooms, we sampled two southwestern shore tributaries, Bois Brule and Siskiwit Rivers. We collected water-quality samples to compute nutrient and sediment loads and to assess cyanobacteria community composition from the tributaries to the nearshore. We collected suspended and streambed sediment to assess the capacity for sediment to store and transport bioavailable P and to assess cyanobacteria community composition. Storm flows drove export of SS, total P, and total nitrogen, with the majority of total P being particulate P. Equilibrium P concentrations revealed that SS sorbed P as it is moved through the stream network across sites and seasons and was a potential source of P to the nearshore. However, streambed sediment in the Bois Brule and Siskiwit River watersheds were P sinks during summer, which potentially delayed transport of dissolved P to the lake. The cyanobacteria community varied spatially and temporally relating to multiple environmental variables including nutrients (P, N, and C) and specific conductivity. Cyanobacteria capable of producing cyanotoxins were present in tributaries and found across multiple environmental compartments indicating a potential for fluvial flow to the nearshore. This study demonstrated that streamflow is a primary driver of total nutrient and sediment loading in both watersheds, which indicates the potential for algal loading to the nearshore via suspended sediment or water.

{"title":"Role of tributary cyanobacterial and nutrient transport and sediment processes on cyanobacterial bloom initiation in Lake Superior nearshore","authors":"Rebecca M. Kreiling , Carrie E. Givens , Anna C. Baker , Richard L. Kiesling , Eric D. Dantoin , Patrik M. Perner , Shelby P. Sterner , Kenna J. Gierke , Paul C. Reneau","doi":"10.1016/j.jglr.2024.102409","DOIUrl":"10.1016/j.jglr.2024.102409","url":null,"abstract":"<div><div>Watershed fluxes of suspended sediment (SS), nutrients, in particular phosphorus (P), and cyanobacteria may play a role in driving cyanobacterial blooms along the southwestern shore of oligotrophic Lake Superior. To understand how tributary loads contribute to nearshore blooms, we sampled two southwestern shore tributaries, Bois Brule and Siskiwit Rivers. We collected water-quality samples to compute nutrient and sediment loads and to assess cyanobacteria community composition from the tributaries to the nearshore. We collected suspended and streambed sediment to assess the capacity for sediment to store and transport bioavailable P and to assess cyanobacteria community composition. Storm flows drove export of SS, total P, and total nitrogen, with the majority of total P being particulate P. Equilibrium P concentrations revealed that SS sorbed P as it is moved through the stream network across sites and seasons and was a potential source of P to the nearshore. However, streambed sediment in the Bois Brule and Siskiwit River watersheds were P sinks during summer, which potentially delayed transport of dissolved P to the lake. The cyanobacteria community varied spatially and temporally relating to multiple environmental variables including nutrients (P, N, and C) and specific conductivity. Cyanobacteria capable of producing cyanotoxins were present in tributaries and found across multiple environmental compartments indicating a potential for fluvial flow to the nearshore. This study demonstrated that streamflow is a primary driver of total nutrient and sediment loading in both watersheds, which indicates the potential for algal loading to the nearshore via suspended sediment or water.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 1","pages":"Article 102409"},"PeriodicalIF":2.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143129561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0