Journal of Great Lakes Research最新文献_第6页

Sedimentary recorded nitrogen-transforming microbes reflect climate fluctuations in a glacial lake on the Qinghai-Tibetan Plateau over a millennium timescale 沉积记录的氮转化微生物反映了青藏高原冰湖千年时间尺度上的气候波动

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-04-07 DOI: 10.1016/j.jglr.2025.102579

Jing Wang , Hanxiao Zhang , Shouliang Huo , Yong Liu , Jingtian Zhang

{"title":"Sedimentary recorded nitrogen-transforming microbes reflect climate fluctuations in a glacial lake on the Qinghai-Tibetan Plateau over a millennium timescale","authors":"Jing Wang , Hanxiao Zhang , Shouliang Huo , Yong Liu , Jingtian Zhang","doi":"10.1016/j.jglr.2025.102579","DOIUrl":"10.1016/j.jglr.2025.102579","url":null,"abstract":"<div><div>We used sedimentary ancient DNA (<em>seda</em>DNA) to reveal the temporal dynamics of the microbial community responsible for nitrogen (N) transformation within Lake Gyaring located on Qinghai-Tibetan Plateau over the past 1400 years. Our results revealed that the change points of microbial composition linked to N-transforming reactions occurred at ∼769 CE, ∼1286 CE, and ∼1850 CE, preceding the corresponding recorded climatic stages—the beginning of the Medieval Warm Period, the transition between the Medieval Warm Period and Little Ice Age, and the transition between the Little Ice Age and the Current Warm Period, respectively—by approximately 0–30 years. The dominant genus <em>Spirochaeta</em> and <em>Anaeromyxobacter</em> participating in N<sub>2</sub> fixation and dissimilatory nitrate reduction to ammonium (DNRA) underwent a sharp decrease, while the prevalent components <em>Iamia</em>, <em>Chitinophaga</em>, <em>Nitrospira</em>, and <em>Nitrosospira</em> involved in NH<sub>4</sub><sup>+</sup> assimilation, ammonification, and nitrification exerted an increase shift at ∼1300 CE. These variations closely matched evident decreases in total nitrogen (TN) content, total organic carbon (TOC) content, and the organic carbon to nitrogen (C:N) ratio, as well as a noticeable increase in TP content at ∼1300 CE. Partial least square path modeling revealed that those nutrient variations induced by climate fluctuations were the predominant driver for the microbial community succession with respect to N transformation. The prevailing community structure across distinct climate periods mainly arose from preferences of the microbial taxa for nutrient loading.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102579"},"PeriodicalIF":2.4,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946576","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

Regime shifts in satellite-derived chlorophyll within the Laurentian Great Lakes 劳伦森五大湖内卫星衍生叶绿素的状态变化

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-04-03 DOI: 10.1016/j.jglr.2025.102573

Nikolay P. Nezlin , SeungHyun Son , Christopher W. Brown , Prasanjit Dash , Caren E. Binding , Ashley K. Elgin , Andrea VanderWoude

{"title":"Regime shifts in satellite-derived chlorophyll within the Laurentian Great Lakes","authors":"Nikolay P. Nezlin , SeungHyun Son , Christopher W. Brown , Prasanjit Dash , Caren E. Binding , Ashley K. Elgin , Andrea VanderWoude","doi":"10.1016/j.jglr.2025.102573","DOIUrl":"10.1016/j.jglr.2025.102573","url":null,"abstract":"<div><div>As a result of implementation of nutrient management following the binational Great Lakes Water Quality Agreement in 1972, the ecosystems within the Laurentian Great Lakes were gradually transforming to lower trophic regimes. This transformation dramatically accelerated in the late 1980s after the introduction of two invasive species of filter-feeding mussels of the genus <em>Dreissena.</em> We performed a detailed analysis of spatial and temporal patterns of this transformation using remotely sensed surface chlorophyll-<em>a</em> concentration (<em>Chl-a</em>) from the multi-satellite long-term Ocean Colour Climate Change Initiative (OC-CCI) dataset as a proxy of ecosystem state. We analyzed 25 years (1997–2022) of monthly composites covering most of the Great Lakes’ area detecting regime shifts in <em>Chl-a</em> employing an integrated approach combining Seasonal-Trend decomposition (STL) and Sequential T-test Analysis of Regime Shifts (STARS). The results identified the timings (shift points) when <em>Chl-a</em> stabilized at new lower trophic regimes, the magnitudes of <em>Chl-a</em> decrease across various lake regions and depths, and the changes in <em>Chl-a</em> seasonal cycles. In Lakes Michigan, Huron, and Ontario, the timings and magnitudes of regime shifts and vanishing of spring phytoplankton bloom suggest that dreissenid mussel presence was a primary driving factor of the observed transformation. We demonstrate that the OC-CCI dataset is a reliable source of information that enables the detection of these regime shifts in major lakes, with only minor effects of inconsistencies resulting from the biases between different satellites collecting data during different time periods.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102573"},"PeriodicalIF":2.4,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946573","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

A five-year summary of water quality, zooplankton, and fishes in the open waters of Lake Erie’s Presque Isle Bay 伊利湖普莱斯克岛湾开放水域水质、浮游动物和鱼类的五年总结

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-04-03 DOI: 10.1016/j.jglr.2025.102574

Christopher M. Dempsey, Gregory M. Andraso, Michelle M. Kuns

{"title":"A five-year summary of water quality, zooplankton, and fishes in the open waters of Lake Erie’s Presque Isle Bay","authors":"Christopher M. Dempsey, Gregory M. Andraso, Michelle M. Kuns","doi":"10.1016/j.jglr.2025.102574","DOIUrl":"10.1016/j.jglr.2025.102574","url":null,"abstract":"<div><div>Long-term monitoring of freshwater ecosystems is critical to understanding how these systems change over time. Our efforts have focused on the open waters of Lake Erie’s Presque Isle Bay (PIB) in Erie, Pennsylvania. The bay serves as an important economic and recreational body of water to the Erie region. Over the last several decades, the bay has undergone numerous water-quality changes and has been well studied, but no researchers have monitored PIB on a continuous basis. In the summer of 2017, a monthly monitoring program was started that focuses on detecting changes in water-quality as well as zooplankton and fish communities. Monitoring is focused from June through November each year. Sampling occurs each month in the same location aboard the <em>RV Environaut</em>. Here, data collected from 2017 through 2021 are presented to document changes in water quality, zooplankton, and fishes in the open waters of PIB. Analyses of variance (ANOVA) revealed a strong seasonal pattern and among-year variation in many water quality and fish parameters. Across the five-year period, linear regression revealed significant decreases in pH, Z<sub>1%</sub> (the depth at which 1% of the light from the surface remains), and juvenile copepod abundance that we link to changes in water level. Our data contribute to the growing body of literature that highlights the importance of studying the near-shore embayments and coastal wetlands in Lake Erie. These shallow areas often respond to environmental perturbations faster or differently than the open waters of the lake.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102574"},"PeriodicalIF":2.4,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946564","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

Effects of Nile tilapia (Oreochromis niloticus) cage aquaculture on water quality in the world’s largest tropical lake 尼罗罗非鱼网箱养殖对世界最大热带湖泊水质的影响

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-04-02 DOI: 10.1016/j.jglr.2025.102576

John K. Okechi , Nick Peoples , Chrispine S. Nyamweya , Paul S. Orina , Michael S. Cooperman , Les Kaufman

{"title":"Effects of Nile tilapia (Oreochromis niloticus) cage aquaculture on water quality in the world’s largest tropical lake","authors":"John K. Okechi , Nick Peoples , Chrispine S. Nyamweya , Paul S. Orina , Michael S. Cooperman , Les Kaufman","doi":"10.1016/j.jglr.2025.102576","DOIUrl":"10.1016/j.jglr.2025.102576","url":null,"abstract":"<div><div>Cage aquaculture in tropical lakes is an efficient means of generating fish protein to ensure food security and support livelihoods. However, it has been repeatedly criticized as injurious to lake ecosystems due to eutrophication and other problems, and therefore ill-advised. This study examined the impacts of Nile tilapia (<em>Oreochromis niloticus</em>) cage farming on water quality across spatial scales in the world’s largest tropical lake, Lake Victoria. The primary objectives were to determine if water quality patterns differed between cage and control stations along a background limnological gradient, and to identify the water quality variables that contributed most to these differences. We postulated that the spatial arrangement of sites in the lake would drive overarching patterns of water quality variation, while cage aquaculture would have additional impacts on these parameters across the spatial gradient. Water column samples were collected from both cage and control stations at four locations along a known gradient in limnology, across 2 years. The results revealed significant differences in water quality between cage and control stations at all four sites, with dissolved oxygen, pH, and silica contributing the most to these differences. These findings highlight the need for site-specific management strategies to both mitigate the environmental impacts of cage aquaculture in tropical lakes and ensure continuity of aquaculture production. Our study provides an approach that can be applied to tropical lakes and reservoirs around the world. Effective nutrient management and continuous monitoring are recommended to support sustainable aquaculture in ecosystems under stress from growing lakeside populations.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102576"},"PeriodicalIF":2.4,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946572","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 convergence of salmonid isotopic niche in Lake Ontario 安大略湖鲑鱼同位素生态位的长期趋同

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-03-29 DOI: 10.1016/j.jglr.2025.102572

Emma J. Bloomfield, Timothy B. Johnson

{"title":"Long-term convergence of salmonid isotopic niche in Lake Ontario","authors":"Emma J. Bloomfield, Timothy B. Johnson","doi":"10.1016/j.jglr.2025.102572","DOIUrl":"10.1016/j.jglr.2025.102572","url":null,"abstract":"<div><div>Investigating niches through time to reveal species’ responses to ecological stressors is critical for successful resource management. Stable isotope analysis of archived fish scales provides a unique opportunity to retrospectively study species’ isotopic niches. We analysed the carbon and nitrogen stable isotopes of lake trout (<em>Salvelinus namaycush</em>), rainbow trout (<em>Oncorhynchus mykiss</em>), and Chinook salmon <em>(O. tshawytscha)</em> from Lake Ontario in 1975, 1991, 2001, 2013, and 2019 to investigate how salmonids’ isotopic niche position and similarity have changed over time. These years capture major stressors, including phosphorus control, dreissenid mussel establishment, and round goby establishment. We found long-term changes in the trophic ecology of Lake Ontario salmonids. The δ<sup>13</sup>C values were less negative in 2001 than 1991, indicating higher littoral benthic carbon reliance after dreissenid mussel establishment. Additionally, the δ<sup>15</sup>N values were lower in 2019 than earlier sampling years (1975 and/or 1991). Isotopic niche overlap between some salmonids was high (≥ 60 %) in 2013 and 2019, concurrent with a decline in the salmonid community carbon and nitrogen range. Lake Ontario salmonid isotopic niches have converged through time, suggesting energy sources for salmonids have become more similar. These changes may increase interspecific interactions between salmonids and reduce food web adaptive capacity. Our analyses affirm pervasive negative impacts of ecological stressors (invasive species and nutrient changes) that impact lakes worldwide.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102572"},"PeriodicalIF":2.4,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946568","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

Diet patterns differ between naturally- and hatchery-produced lake trout across life stages 在整个生命阶段，自然养殖的湖鳟鱼和人工养殖的湖鳟鱼的饮食模式是不同的

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-03-27 DOI: 10.1016/j.jglr.2025.102570

Matthew H. Futia , Jacques Rinchard , J. Ellen Marsden

{"title":"Diet patterns differ between naturally- and hatchery-produced lake trout across life stages","authors":"Matthew H. Futia , Jacques Rinchard , J. Ellen Marsden","doi":"10.1016/j.jglr.2025.102570","DOIUrl":"10.1016/j.jglr.2025.102570","url":null,"abstract":"<div><div>Hatchery-reared fish often have behaviors suited for hatchery conditions and can maintain those behaviors after being stocked in natural environments. Diet-related behaviors that differ between stocked and wild fish can include feeding patterns and prey selection. Most comparisons of stocked and wild fish diets have evaluated patterns for short periods (<1 year) after stocking or focused on juvenile behaviors. Here, we tested the hypothesis that hatchery rearing has lifetime effects on foraging success and diet composition by comparing diet patterns between stocked and wild lake trout (<em>Salvelinus namaycush</em>) in Lake Champlain across sizes that include juveniles and adults. Lake trout foraging success was assessed using lipid content and stomach content analyses, including frequency of empty stomachs, stomach fullness by count, and reconstructed mass of prey fish consumed. Diet composition was evaluated using frequency of occurrence for each prey item and fatty acid profiles. Stocked lake trout consumed significantly fewer prey fish by count (27 % average modeled reduction) and had significantly lower lipid content (21 % average modeled reduction) compared to wild fish across all sizes. Stocked fish also tended to have empty stomachs more frequently (19 % average modeled increase) and lower reconstructed mass of prey fish consumed (25 % average modeled reduction) compared to wild fish. Diet composition was similar, however, between stocked and wild fish with most lake trout primarily consuming alewife (<em>Alosa pseudoharengus</em>). Together, these results suggest that the population of stocked lake trout (juveniles and adults) had lower foraging success and energy consumption compared to wild fish.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102570"},"PeriodicalIF":2.4,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946570","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

Mercury bioaccumulation in the aquatic food webs from Lakes Huron, Erie, and Ontario in North America 北美休伦湖、伊利湖和安大略湖水生食物网中汞的生物积累

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-03-11 DOI: 10.1016/j.jglr.2025.102548

Junda Ren , Sujan Fernando , Philip K. Hopke , Thomas M. Holsen , Trevor Massey , Lisa B. Cleckner , Bernard S. Crimmins

{"title":"Mercury bioaccumulation in the aquatic food webs from Lakes Huron, Erie, and Ontario in North America","authors":"Junda Ren , Sujan Fernando , Philip K. Hopke , Thomas M. Holsen , Trevor Massey , Lisa B. Cleckner , Bernard S. Crimmins","doi":"10.1016/j.jglr.2025.102548","DOIUrl":"10.1016/j.jglr.2025.102548","url":null,"abstract":"<div><div>Mercury is a persistent pollutant that bioaccumulates in biota, posing ecological and health risks. This study examines the total and methylmercury (THg and MeHg, respectively) levels in the Lake Huron (LH), Ontario (LO), and Erie (LE) food webs. The MeHg levels (mean ± standard deviation) in LH and LE zooplankton (18.1 ± 11.8 ng/g dry weight (dw) and 31.5 ± 34.1 ng/g dw, respectively) were similar, but significantly higher than observed in zooplankton from LO (0.521 ± 0.219 ng/g dw). THg concentrations in lake trout (<em>Salvelinus namaycush</em>) from LO (103 ± 31 ng/g wet weight (wwt)) were similar to those in LE (90.1 ± 33 ng/g wwt), but lower than those in LH (181 ± 46 ng/g wwt). The highest sediment Hg concentrations (MeHg: 1.23 ± 0.14 ng/g dw; THg: 342 ± 3.9 ng/g dw) were observed at the western LE site, compared to other sites across the three lakes in this study (MeHg: 0.414 ± 0.331 ng/g dw; THg: 41.7 ± 32.5 ng/g dw). The trophic magnification slope (TMS) using log-transformed MeHg concentrations (dw) and nitrogen stable isotopes (δ<sup>15</sup>N) ranged from 0.15 to 0.36. Biomagnification factors (BMFs) of MeHg (dw) between prey fish and macroinvertebrates ranged from 0.246 ± 0.059 to 138 ± 21, whereas BMFs for apex predators and their major prey were greater than 1. The current study provides a contemporary assessment of mercury transfer in three of the Laurentian Great Lakes, illustrating the importance of trophic level on Hg bioaccumulation.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102548"},"PeriodicalIF":2.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946565","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

Winter thermal structure across the Laurentian Great Lakes 横跨劳伦森五大湖的冬季热结构

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-03-08 DOI: 10.1016/j.jglr.2025.102550

Jay A. Austin , Eric J. Anderson , Andrew D. Gronewold , Steven A. Ruberg , Craig A. Stow , Mathew G. Wells

{"title":"Winter thermal structure across the Laurentian Great Lakes","authors":"Jay A. Austin , Eric J. Anderson , Andrew D. Gronewold , Steven A. Ruberg , Craig A. Stow , Mathew G. Wells","doi":"10.1016/j.jglr.2025.102550","DOIUrl":"10.1016/j.jglr.2025.102550","url":null,"abstract":"<div><div>The formation of winter stratification and thermal structure in general across the Great Lakes varies in character not just between lakes, but interannually within individual lakes. Three large datasets comprise all of the publicly available Great Lakes water temperature data that span both the winter and the entire water column. Multiple sites and multiple years of data are available for Lake Superior, as well as multiple years in Lake Huron and Lake Michigan, 2 years in Lake Ontario at multiple sites, and a single year at two sites in Lake Erie. The lakes show diverse manifestations of winter stratification, with Lake Superior reliably forming winter stratification, Lake Michigan rarely forming stratification, and Huron forming stratification in about half of the winters for which data are available (there is not enough data to evaluate this for Erie and Ontario). Whether a lake forms stratification or not in a given year is governed by how much heat a lake loses below the temperature of maximum density; a heat content of roughly −1 GJm<sup>−2</sup> relative to the temperature of maximum density appears to be a threshold for the formation of winter stratification. Minimum heat content in a given year is a strong function of average winter air temperature. When combined with a historical database of basin-wide air temperature, the winter stratification threshold can be used to hindcast stratification formation in Superior, Huron, and Michigan over the last century, showing that Michigan and Huron are currently undergoing a climate-driven shift in stratification status.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102550"},"PeriodicalIF":2.4,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946559","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

Partial diel vertical migration and niche partitioning in Mysis revealed by stable isotopes 稳定同位素揭示的梅西斯的部分垂直迁移和生态位划分

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-03-04 DOI: 10.1016/j.jglr.2025.102549

Bianca Possamai , Rosaura J. Chapina , Daniel L. Yule , Jason D. Stockwell

{"title":"Partial diel vertical migration and niche partitioning in Mysis revealed by stable isotopes","authors":"Bianca Possamai , Rosaura J. Chapina , Daniel L. Yule , Jason D. Stockwell","doi":"10.1016/j.jglr.2025.102549","DOIUrl":"10.1016/j.jglr.2025.102549","url":null,"abstract":"<div><div>Diel vertical migration (DVM) is critical for moving energy and nutrients between surface and deep waters. <em>Mysis</em> sp. (Crustacea: Mysidae) facilitates this process by serving as predator and prey in both benthic and pelagic habitats. <em>Mysis</em> can also exhibit partial DVM (pDVM), where some individuals do not migrate into the pelagia at night or to the benthos during the day. However, whether <em>Mysis</em> pDVM is a fixed (i.e., same individuals migrate) or random (i.e., random individuals migrate) behavior remains unclear. To evaluate that, we tested whether <em>Mysis</em> exhibit pDVM and niche partitioning in Lake Superior by collecting <em>Mysis</em> from benthic and pelagic habitats day and night across depths ranging from 50 to 250 m and estimating their isotopic niche size (δ<sup>13</sup>C, δ<sup>15</sup>N; Corrected Standard Ellipse Area − SEA<sub>c</sub>) and overlap among three life stages. At the population level, <em>Mysis</em> exhibited fixed pDVM structured by life stage. Benthic <em>Mysis</em> (12.9 ± 3.2 mm, mean ± SD) were larger than pelagic <em>Mysis</em> during night (9.6 ± 3.6 mm) and day (8.5 ± 3.6 mm). Adult <em>Mysis</em> (> 15 mm) had larger SEA<sub>c</sub> (1.8 ± 0.4 ‰<sup>2</sup>) compared to juveniles (< 10 mm; 0.3 ± 0.1 ‰<sup>2</sup>) and sub-adults (10–15 mm; 0.7 ± 0.2 ‰<sup>2</sup>), and their isotopic niche did not overlap with smaller life stages. Adults exhibited random pDVM (i.e., high isotopic niche overlap), whereas juveniles exhibited fixed pDVM (i.e., low overlap). Our observations indicate complex behaviors across and within <em>Mysis</em> life stages, likely due to varying pressures including size-selective predation, light and temperature thresholds, and nutritional requirements. Consequently, the benthic behavior of adult <em>Mysis</em> needs to be considered in monitoring programs.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102549"},"PeriodicalIF":2.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946663","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

Two-year follow-up on an environmental health literacy software intervention for Anishinaabe Native Americans 对Anishinaabe印第安人环境健康素养软件干预的两年随访

IF 2.4 3区环境科学与生态学

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

{"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