Journal of Great Lakes Research最新文献_第2页

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

A comparison of age-0 alewife energy content between two Lake Michigan habitats and year classes 两种密歇根湖栖息地和年级之间0岁大灰鲑能量含量的比较

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.2025.102546

Steven Pothoven , Les Warren , Tomas Höök

{"title":"A comparison of age-0 alewife energy content between two Lake Michigan habitats and year classes","authors":"Steven Pothoven , Les Warren , Tomas Höök","doi":"10.1016/j.jglr.2025.102546","DOIUrl":"10.1016/j.jglr.2025.102546","url":null,"abstract":"<div><div>The energy content and diet mass of juvenile alewife <em>Alosa pseudoharengus</em> was determined in Muskegon Lake, a drowned river mouth lake, and in the adjacent nearshore zone of Lake Michigan during summer and fall 2021 and 2022 and spring 2022 and 2023. Larger age-0 alewife had disproportionately higher total energy as a function of length than small alewife at both sites. Because age-0 alewife from Muskegon Lake grew to a larger average size, individuals had 43 and 204 % greater total energy content than in Lake Michigan in fall 2021 and 2022, respectively. Contrary to expectations, length-specific energy content declined from summer through fall each year, possibly related to declines in diet mass in the fall. Although diet mass was higher in 2021 than 2022, there were no differences in length-adjusted energy content between years during the fall in either lake. However, in Lake Michigan, the average length was much larger in fall 2021 (79 mm) than 2022 (66 mm) so that the average predicted total energy content in 2021 (20,889 J) was over twice that in fall 2022 (9852 J). Energy content declined over winter, but in spring 2023, small yearlings had surprisingly lost less size-adjusted energy than larger fish. Age-0 alewife had lower length-adjusted energy content in 2021 and 2022 than in 2001 and/or 2002 in both lakes. Nursery habitats such as the drowned river mouths where age-0 fish have higher diet mass and grow larger provide an energetic advantage over the main basin habitat of Lake Michigan.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102546"},"PeriodicalIF":2.4,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946569","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

Effect of tilapia cage culture on algae and cyanobacteria communities in the bays of Bukavu basin, Lake Kivu, DR Congo 罗非鱼网箱养殖对刚果民主共和国基伍湖布卡武盆地海湾藻类和蓝藻群落的影响

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-28 DOI: 10.1016/j.jglr.2025.102547

Gabriel Balagizi Baguma , Mulongaibalu Mbalassa , Alfred Kabagale Cubaka , Alicet Bwanamudogo Irenge , Elysée Rutakaza Nzigire , Christine Cocquyt

{"title":"Effect of tilapia cage culture on algae and cyanobacteria communities in the bays of Bukavu basin, Lake Kivu, DR Congo","authors":"Gabriel Balagizi Baguma , Mulongaibalu Mbalassa , Alfred Kabagale Cubaka , Alicet Bwanamudogo Irenge , Elysée Rutakaza Nzigire , Christine Cocquyt","doi":"10.1016/j.jglr.2025.102547","DOIUrl":"10.1016/j.jglr.2025.102547","url":null,"abstract":"<div><div>Algae and cyanobacteria communities were monitored and associated with nutrients and anthropogenic activities in bays of the Bukavu basin of Lake Kivu (DR Congo). The monitoring was done to investigate the impact of Nile tilapia (<em>Oreochromis niloticus</em>) cage culture on algae and cyanobacteria communities in selected bays. Sampling was carried out from February to September 2021. In all selected bays, a standard quantity of water was filtered through a 10 µm mesh phytoplankton net for planktonic algae, while the epiphytic algae were scraped from cage net walls and macrophytes accordingly. The results revealed higher abundance of pollution-tolerant algae (diatoms) and cyanobacteria in the pilot bays than in the control bay, suggesting impacts of tilapia cages on the aquatic communities. The study detected a significant difference (<em>p</em> ≤ 0.05) in algal and cyanobacteria composition between the pilot and control bays; this could be associated with differences in fish cage and anthropogenic activities around the sampling sites. The study clearly highlighted the influence of nutrient inputs into the development of algae and cyanobacteria communities in the pilot bays, emphasizing the impact of both tilapia cage culture and anthropogenic activities on the alteration of water quality. Therefore, the study recommends relocation of the tilapia cages to bays that are not impacted or less impacted by anthropogenic activities, and to regulation of feed supply. Analyses should be done to elucidate ecological and nutritional importance of the algae and cyanobacteria communities for the development of tilapia cage culture in Lake Kivu.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102547"},"PeriodicalIF":2.4,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946571","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

High abundance and diversity of flagellates under ice cover in Lake Baikal revealed by microscopy and metabarcoding 贝加尔湖冰盖下鞭毛虫丰富多样

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-27 DOI: 10.1016/j.jglr.2025.102545

Maria V. Bashenkhaeva, Yulia R. Zakharova, Yuri P. Galachyants, Darya P. Petrova, Mikhail M. Makarov, Maria V. Sakirko, Anna Yu. Bessudova, Ivan N. Smolin, Igor V. Khanaev, Yelena V. Likhoshway

{"title":"High abundance and diversity of flagellates under ice cover in Lake Baikal revealed by microscopy and metabarcoding","authors":"Maria V. Bashenkhaeva, Yulia R. Zakharova, Yuri P. Galachyants, Darya P. Petrova, Mikhail M. Makarov, Maria V. Sakirko, Anna Yu. Bessudova, Ivan N. Smolin, Igor V. Khanaev, Yelena V. Likhoshway","doi":"10.1016/j.jglr.2025.102545","DOIUrl":"10.1016/j.jglr.2025.102545","url":null,"abstract":"<div><div>Lakes located in the north temperate zone may be covered with ice for long periods. Under the ice, a habitat is created, different from the open water period, which is characterized by low temperature and reduced light due to ice and snow cover. We investigated phytoplankton in sub-ice communities (SI) at the ice-water interface and the 0–25 m under-ice water column communities (UW) in the pelagic zone of Lake Baikal. Community structure was assessed using microscopy and metabarcoding of fragments of 18S rRNA gene. Flagellate diversity included 34 taxa from 64 microalgae identified by microscopy and 48 operational taxonomic units (OTUs) from 56 identified by metabarcoding. In conditions of complete snow-covered ice, high diversity and abundance of flagellates (up to 14 million cells L<sup>−1</sup>) were observed, with an advantage due to their mobility and different feeding modes. Both microscopy and metabarcoding data show that the taxonomic structure of SI and UW is different. SI communities of Lake Baikal showed mass development of a mixed group of nanoflagellates, which consisted of “<em>Spumella-</em> and <em>Chlamydomonas</em>-like flagellates”. SI communities were less taxonomically diverse, suggesting that available resource gradients on the ice bottom are more tightly constrained, and taxa have to be ice bottom specialists to survive there. The relative spatial heterogeneity of SI communities is reflective of greater homogenization of habitat parameters in the winter water column and more dynamic conditions on the ice bottom. The data obtained expand the understanding of the diversity and abundance of organisms in under-ice habitats in north temperate latitudes.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102545"},"PeriodicalIF":2.4,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946664","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 纸浆和造纸厂排放污水中天然和人为有机物质鉴定的新方法

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-24 DOI: 10.1016/j.jglr.2025.102541

Maria Zobkova, Natalia Galakhina, Mikhail Zobkov

{"title":"New method for identification of natural and anthropogenic organic matter in receiving waters of pulp and paper mill discharge","authors":"Maria Zobkova, Natalia Galakhina, Mikhail Zobkov","doi":"10.1016/j.jglr.2025.102541","DOIUrl":"10.1016/j.jglr.2025.102541","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102541"},"PeriodicalIF":2.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631888","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

First evidence of lake trout Salvelinus namaycush spawning aggregation in Ohio waters of Lake Erie following reintroduction 第一个证据湖鳟鱼Salvelinus namaycush产卵聚集在俄亥俄州水域的伊利湖重新引入后

IF 2.4 3区环境科学与生态学

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

{"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 影响东乔治亚湾近岸湖床生态的多重压力因素

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-02-20 DOI: 10.1016/j.jglr.2025.102542

E. Todd Howell , K. Stevack

{"title":"Multiple stressors influencing the lakebed ecology of nearshore eastern Georgian Bay","authors":"E. Todd Howell , K. Stevack","doi":"10.1016/j.jglr.2025.102542","DOIUrl":"10.1016/j.jglr.2025.102542","url":null,"abstract":"<div><div>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 <em>Dreissena</em>, an absence of benthic macro-algae, and the lack of relationship between mussel occurrence and periphyton chlorophyll <em>a</em> 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 (<em>Neogobius melanostomus</em>) 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.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102542"},"PeriodicalIF":2.4,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631835","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}

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