Journal of Great Lakes Research最新文献_第7页

A watershed model predicts the effects of cover crops on river flows, sediment transport, and nutrient loss to Lake Michigan 流域模型预测覆盖作物对河流流量、沉积物迁移以及密歇根湖养分流失的影响

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-01-23 DOI: 10.1016/j.jglr.2025.102528

Mohamed A. Aboelnour , Jennifer L. Tank , Alan F. Hamlet , Todd V. Royer , Diogo Bolster

{"title":"A watershed model predicts the effects of cover crops on river flows, sediment transport, and nutrient loss to Lake Michigan","authors":"Mohamed A. Aboelnour , Jennifer L. Tank , Alan F. Hamlet , Todd V. Royer , Diogo Bolster","doi":"10.1016/j.jglr.2025.102528","DOIUrl":"10.1016/j.jglr.2025.102528","url":null,"abstract":"<div><div>Recent investigations highlight the imperative of diminishing nonpoint nutrient loading to mitigate the prevalence of harmful algal blooms and hypoxic conditions in the Great Lakes region. This study employs the Soil and Water Assessment Tool (SWAT) to conduct a comprehensive assessment of the model’s performance in simulating hydrology, sediment, and nutrient dynamics at the St. Joseph River Basin (SJRB). We used the SWAT model to evaluate the effectiveness of the planting of winter cover crops (WCC) on the magnitude and dynamics of dissolved nutrient and sediment export within the basin. We modeled different WCC scenarios by varying the fraction of the row-crop land to which WCC were planted during the fallow period. We show that although WCC have a minimal effect on streamflow, they substantially reduce total suspended solids (TSS) losses by up to 30 %, demonstrating their efficacy in soil erosion control. In contrast, there were variable effects of WCC on reducing dissolved reactive phosphorus (DRP) and nitrate-N (NO<sub>3</sub>-N) losses, with a higher effect on NO<sub>3</sub>-N losses than on DRP, resulting in up to a 4 % reduction in DRP and 12 % reduction in NO<sub>3</sub>-N losses. This study underscores the versatility of the SWAT model in assessing watershed flow and nutrient and sediment dynamics, offering valuable insights into the quantification and intercomparison of conservation and management interventions that improve water quality in agricultural watersheds in the Great Lakes region.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102528"},"PeriodicalIF":2.4,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631820","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

Routine metabolism of larval and early juvenile lake whitefish (Coregonus clupeaformis) and cisco (C. artedi) at three temperatures 湖白鱼（Coregonus clupeaformis）和cisco （C. artedi）在三种温度下幼虫和早期幼鱼的日常代谢

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-01-22 DOI: 10.1016/j.jglr.2025.102509

Kelly A. Hoyer , Peter D. Dijkstra , Tracy L. Galarowicz , Julia R. Harig , Jory L. Jonas , J. Ellen Marsden , Jason B. Smith , A. Scott McNaught

{"title":"Routine metabolism of larval and early juvenile lake whitefish (Coregonus clupeaformis) and cisco (C. artedi) at three temperatures","authors":"Kelly A. Hoyer , Peter D. Dijkstra , Tracy L. Galarowicz , Julia R. Harig , Jory L. Jonas , J. Ellen Marsden , Jason B. Smith , A. Scott McNaught","doi":"10.1016/j.jglr.2025.102509","DOIUrl":"10.1016/j.jglr.2025.102509","url":null,"abstract":"<div><div>Lake whitefish (<em>Coregonus clupeaformis</em>) and cisco (<em>C. artedi</em>) are important contributors to Great Lakes ecosystems and to commercial and sport fisheries. Therefore, there is interest in understanding mechanisms that influence survival and growth, particularly recruitment declines beginning at early life stages. Routine metabolism is an important parameter in bioenergetic models to predict larval fish growth, yet there are few estimates of routine metabolic rate (RMR) for early life stage coregonines. We measured RMR of larval (<19 mm total length, TL) and early juvenile (19–29 mm TL) lake whitefish and cisco at three temperatures (8, 10, and 12 °C) to establish whether there are general differences between the two species or more specific differences in response to different temperatures. The metabolic rates of larval cisco were significantly higher than larval lake whitefish at 8 and 10 °C, but no species-specific differences in metabolic rates were observed at the early juvenile stage. RMR was positively related to temperature for both species at both life stages, although the magnitude of the temperature-dependent response was less pronounced for early juvenile fish than it was for smaller fish. With higher metabolic rates earlier in life compared to lake whitefish, larval cisco may exhibit higher growth rates if food resources are plentiful and may experience faster swimming speeds to search for prey and escape predators when resources are limited relative to lake whitefish.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102509"},"PeriodicalIF":2.4,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631837","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

Age-dependent juvenile mortality explains delayed smolting in a declining steelhead population 受年龄影响的幼鱼死亡率解释了钢镞种群数量下降的延迟蜕皮原因

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-01-16 DOI: 10.1016/j.jglr.2025.102508

Kyle Stratton , Jon George , Friedrich Fischer , Thomas R. Hrabik , Erin S. Dunlop , Brian J. Shuter , Michael D. Rennie

{"title":"Age-dependent juvenile mortality explains delayed smolting in a declining steelhead population","authors":"Kyle Stratton , Jon George , Friedrich Fischer , Thomas R. Hrabik , Erin S. Dunlop , Brian J. Shuter , Michael D. Rennie","doi":"10.1016/j.jglr.2025.102508","DOIUrl":"10.1016/j.jglr.2025.102508","url":null,"abstract":"<div><div>Fish populations in the Laurentian Great Lakes have undergone major changes over recent decades. Demographic changes in fish populations are often accompanied by changes in life history strategies that reflect variation in mortality applied to different life stages. We examined the steelhead (<em>Oncorhynchus mykiss</em>) population in Black Bay, Lake Superior, where a naturalized steelhead population experienced significant demographic changes over three decades. Initial increases in density in Portage Creek, Black Bay (1995–2007) were associated with reductions in angler mortality (applied to adult steelhead), but the population declined (2007–2018) despite no further changes in angler mortality. Simultaneously, the dominant life history among several Black Bay tributaries changed between 2013 and 2017, with returning spawners becoming primarily represented by individuals who smolted at age 2 (a more common pattern across other Lake Superior populations) from those who primarily smolted at age 1. To assess whether changes in juvenile mortality could explain observed life history shifts in surviving spawners and recent steelhead population declines, we constructed Leslie matrices with differential mortality applied to observed demographics from Portage Creek steelhead to evaluate scenarios representing increased parr (in-stream) mortality and increased smolt (in-lake) mortality. The observed demographic changes in Portage Creek (i.e., shift from 1 to 2 year smolts and associated population declines) were predicted by a model applying size-dependent smolt survivorship to female steelhead in a fashion consistent with increased in-lake mortality of age 1 smolts. This study provides an example of population-level responses to increased stage-specific mortality and offers an example of how in-lake conditions can influence potamodromous salmonids in the Laurentian Great Lakes.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102508"},"PeriodicalIF":2.4,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631815","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

Spatial genetic structure of upper Great Lakes burbot (Lota lota) 五大湖上游河狸（Lota Lota）空间遗传结构

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-01-14 DOI: 10.1016/j.jglr.2024.102506

Grant L. Bruninga , Jeannette Kanefsky , Kim T. Scribner

{"title":"Spatial genetic structure of upper Great Lakes burbot (Lota lota)","authors":"Grant L. Bruninga , Jeannette Kanefsky , Kim T. Scribner","doi":"10.1016/j.jglr.2024.102506","DOIUrl":"10.1016/j.jglr.2024.102506","url":null,"abstract":"<div><div>The population abundance and distribution of many Great Lakes fish species, particularly those that are adapted to cold water, have changed greatly in recent times due in part to changes in physical lake and biotic environments. Burbot (<em>Lota lota</em>) is an understudied cold water benthivore of conservation concern. To characterize levels of genetic diversity and spatial genetic structure associated with historical phylogeographic isolation or contemporary reproductive isolation, microsatellite genotypes and mitochondrial DNA sequences were analyzed for burbot (n = 253) collected from 14 open water locations in Lakes Huron, Michigan, and Superior and the upper St. Clair River. Spatial variation in levels of diversity and degree of genetic distinction among samples in different geographic locations was most evident over broader geographic scales between Lake Superior and Lakes Michigan and Huron. Members of open-water sampling locations within basins did not differ significantly in microsatellite allele or mtDNA haplotype frequency. Data from this study and from previous results in other North American locations indicated that burbot sampled from the upper Great Lakes likely originated from multiple glacial refugia, and that geographic representations were admixed at the lake basin level. Analyses differentiating populations of burbot will inform managers how to appropriately target the genetically differentiated populations to support species management.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102506"},"PeriodicalIF":2.4,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631817","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

Suspect screening and nontargeted analysis of polyfluoroalkyl substances in Lake Huron water and biota 休伦湖水体和生物群中多氟烷基物质的可疑筛选和非靶向分析

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-01-12 DOI: 10.1016/j.jglr.2025.102507

Junda Ren , Sujan Fernando , Philip K. Hopke , Thomas M. Holsen , Bernard S. Crimmins

{"title":"Suspect screening and nontargeted analysis of polyfluoroalkyl substances in Lake Huron water and biota","authors":"Junda Ren , Sujan Fernando , Philip K. Hopke , Thomas M. Holsen , Bernard S. Crimmins","doi":"10.1016/j.jglr.2025.102507","DOIUrl":"10.1016/j.jglr.2025.102507","url":null,"abstract":"<div><div>Nontargeted analyses (NTA) have identified numerous unknown/novel per- and polyfluoroalkyl substances (PFAS) in water, aqueous film-forming foam, and commercial products, but few studies have used nontargeted approaches to analyze PFAS in aquatic organisms. This study employed NTA to investigate PFAS profiles in the Lake Huron water and biota, including zooplankton, dreissenid mussels, selected prey fish, and lake trout (<em>Salvelinus namaycush</em>). Five suspect perfluoroalkyl acids (PFAA) precursors and perfluoroethylcyclohexane sulfonate (PFECHS) were detected in the water and biota without the use of reference standards. Notably, N-ethyl perfluorooctane sulfonamido acetate (EtFOSAA) was detected in deepwater sculpin (<em>Myoxocephalus thompsonii</em>), PFECHS was detected in water and deepwater sculpin, and N-methyl perfluorooctanesulfonamido acetate (MeFOSAA) was detected in bloater (<em>Coregonus hoyi</em>). Different species are likely exposed to different PFAS due to variations in habitat and food sources. However, PFAS may also bioaccumulate in both prey and predator through foraging. To verify this hypothesis, unknown PFAS features observed in two or more composites from each species were isolated. The unknown PFAS with estimated concentrations >0.5 ng/g wet weight, and biomagnification factors (BMF) >1 were then isolated from all PFAS candidates detected in the food web components, particularly those identified in both prey and predator species. This subset of PFAS features was then slated for structural elucidation. A total of 66 unknown PFAS were detected in the biota and 19 in the water, with proposed structures containing carboxylic, ether, thiol, sulfonyl, amino, and amide groups.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102507"},"PeriodicalIF":2.4,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631822","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

Anthropogenic litter and plastics across size classes on a mechanically groomed Great Lakes urban beach 在机械修整的五大湖城市海滩上，各种大小的人为垃圾和塑料

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-01-09 DOI: 10.1016/j.jglr.2024.102505

Anne J. Jefferson , Kayla Kearns , Kylie Snyder , Alexis Mitchell , Sophia Muratori , Christopher J. Rowan

{"title":"Anthropogenic litter and plastics across size classes on a mechanically groomed Great Lakes urban beach","authors":"Anne J. Jefferson , Kayla Kearns , Kylie Snyder , Alexis Mitchell , Sophia Muratori , Christopher J. Rowan","doi":"10.1016/j.jglr.2024.102505","DOIUrl":"10.1016/j.jglr.2024.102505","url":null,"abstract":"<div><div>Anthropogenic litter and plastic pollution are well-recognized global and Great Lakes stressors, but the distribution of plastic pollution on shorelines is uneven. Beaches in urban areas are close to many potential sources of plastic pollution and often heavily visited, so are likely exposed to high litter inputs. Conversely, beach maintenance activities, including mechanical grooming, may lower litter concentrations. In the summer of 2021, surface litter and > 2 mm anthropogenic materials within the top 5 cm of beach sediment were repeatedly measured along 10 transects at Euclid Beach, in Cleveland, Ohio. Plastics comprised 79 % of litter > 50 mm and 100 % of smaller visible litter on the beach surface. Surface litter concentrations (0.279 pieces m<sup>−2</sup>) were relatively low compared to previously studied Great Lakes strandlines, with mechanical grooming and beach visitor usage influencing litter distribution. However, when plastics within the top 5 cm of the beach sediment were included, Euclid Beach microplastics (54.7 pieces m<sup>−2</sup>) and mesoplastics (45.0 pieces m<sup>−2</sup>) concentrations were among the highest in the Great Lakes. Plastic production pellets were the most common microplastic morphology, while foamed plastics were the most common mesoplastics. Most plastics in the sediment were too small to be removed by mechanical grooming, but fragmentation of larger, weathered plastics is a potential concern deserving further investigation. Overall, our results suggest that urban, mechanically-groomed beaches can have high plastics loads. Such beaches should be strategically included in larger scale studies of plastic pollution along shorelines, especially when considering issues of environmental justice.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102505"},"PeriodicalIF":2.4,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631889","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

Stable C and N isotope analyses redefine cisco as pelagic piscivores in Lake Michigan 稳定的C和N同位素分析重新定义了思科作为密西根湖的远洋鱼食动物

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2025-01-04 DOI: 10.1016/j.jglr.2024.102504

Benjamin A. Turschak , Jason B. Smith , Ben S. Breaker , Charles R. Bronte , David B. Bunnell , Jory L. Jonas , Matthew S. Kornis , Chad LaFaver , Kevin L. Pangle , Harvey A. Bootsma

{"title":"Stable C and N isotope analyses redefine cisco as pelagic piscivores in Lake Michigan","authors":"Benjamin A. Turschak , Jason B. Smith , Ben S. Breaker , Charles R. Bronte , David B. Bunnell , Jory L. Jonas , Matthew S. Kornis , Chad LaFaver , Kevin L. Pangle , Harvey A. Bootsma","doi":"10.1016/j.jglr.2024.102504","DOIUrl":"10.1016/j.jglr.2024.102504","url":null,"abstract":"<div><div>Lake Michigan’s cisco (<em>Coregonus artedi</em>) population is in the midst of an expansion (2011-present) recovering from near extirpation levels observed in the 1970 s. Strong evidence of piscivory derived from observed diet analyses suggests the population may occupy a unique trophic position relative to typical expectations for the species. To verify these observations, cisco and their prey were collected from 2017 to 2020 for stable C and N isotope analyses. Leveraging existing stable isotope datasets for Lake Michigan, the trophic position of cisco was assessed by quantifying the isotopic niche space occupied relative to common salmonine piscivores and prey fish species. Diet mixing models were constructed to estimate the relative importance of potential prey sources to cisco diets. Results suggested that cisco occupied an isotopic niche similar to Pacific salmonines (<em>Oncorhynchus</em> spp.) and brown trout (<em>Salmo trutta</em>) that are mainly piscivorous. Conversely, there was low isotopic niche overlap with prey fish species that are mainly planktivorous. Mixing models suggest greater reliance on pelagic prey sources (including alewife <em>Alosa pseudoharengus</em> and <em>Bythotrephes longimanus</em>) in cisco diets when compared with observations of stomach contents. Under the present ecological conditions in Lake Michigan, it appears that adult cisco in this population occupy the trophic role of a pelagic piscivore.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 2","pages":"Article 102504"},"PeriodicalIF":2.4,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143631836","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

Comparisons of isotopic niche between females and male alternative reproductive tactics of Chinook salmon (Oncorhynchus tshawytscha) from Lake Ontario 安大略湖奇努克鲑鱼雌、雄两种生殖策略的同位素生态位比较

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102423

K.A. Adeli , K. Johnson , T.E. Pitcher

{"title":"Comparisons of isotopic niche between females and male alternative reproductive tactics of Chinook salmon (Oncorhynchus tshawytscha) from Lake Ontario","authors":"K.A. Adeli , K. Johnson , T.E. Pitcher","doi":"10.1016/j.jglr.2024.102423","DOIUrl":"10.1016/j.jglr.2024.102423","url":null,"abstract":"<div><div>Chinook salmon (<em>Oncorhynchus tshawytscha</em>) have complex life histories with two distinct male alternative reproductive tactics (ARTs). The larger and older “hooknose” males battle for position to spawn with nesting females whereas the precociously maturing “jack” males use a sneaking tactic to gain access to females. Although dietary niche is known to differ between ARTs of other fish taxa, no research to date has examined these differences in a salmonid. Here, we used δ<sup>15</sup>N and δ<sup>13</sup>C stable isotope analyses to compare the dietary niches of female, hooknose male, and jack male Chinook salmon sampled from a Lake Ontario tributary. We found that all three life histories shared similar δ<sup>15</sup>N values, whereas jack males had greater δ<sup>13</sup>C values compared to hooknose males, with females having intermediate values. Jack males also had notably little overlap in their isotopic niche space with hooknose males and females, indicating that jack males occupy a distinct isotopic niche in Lake Ontario. We discuss habitat partitioning and differences in dietary niche as explanatory factors. Altogether, these data unveil novel distinctions in isotopic niche within the complex life history strategies of Chinook salmon in Lake Ontario that can inform management decisions and provide avenues for future research.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"50 6","pages":"Article 102423"},"PeriodicalIF":2.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143143108","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

Documentation of a probable spawning run of cisco Coregonus artedi in the Spanish River, Ontario, Canada 在西班牙河，安大略省，加拿大，一个可能的产卵运行cisco Coregonus artedi文件

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102421

Andrew E. Honsey , Ralph W. Tingley III , Katie V. Anweiler , Cory O. Brant , Marc Chalupnicki , Chris Davis , Steven A. Farha , Paul W. Fedorowicz , Todd Hayden , Philippa Kohn , Benjamin S. Leonhardt , Brian P. O’Malley

{"title":"Documentation of a probable spawning run of cisco Coregonus artedi in the Spanish River, Ontario, Canada","authors":"Andrew E. Honsey , Ralph W. Tingley III , Katie V. Anweiler , Cory O. Brant , Marc Chalupnicki , Chris Davis , Steven A. Farha , Paul W. Fedorowicz , Todd Hayden , Philippa Kohn , Benjamin S. Leonhardt , Brian P. O’Malley","doi":"10.1016/j.jglr.2024.102421","DOIUrl":"10.1016/j.jglr.2024.102421","url":null,"abstract":"<div><div>Coregonines were historically diverse and abundant in the Laurentian Great Lakes but declined throughout the 19th and 20th centuries due to multiple factors, including overfishing, habitat degradation, and interactions with invasive species. Great Lakes fishery managers are now working to restore coregonines across the basin. An important aspect of restoration efforts is the identification of key habitats, such as spawning habitats. Our understanding of the extent and diversity of coregonine spawning habitats in the Great Lakes is limited. Historical accounts suggest some cisco <em>Coregonus artedi</em> migrated to tributaries to spawn, but contemporary runs have not been reported. Moreover, cisco display considerable phenotypic variation, with different “forms” often occupying specific habitats or regions. We provide evidence for a previously undocumented spawning run of cisco in the Spanish River, a tributary to the North Channel of Lake Huron. We captured 31 mature and ripe fish (25 males, 6 females) approximately 52 km upstream of the river mouth on 15–16 November 2022. The fish ranged in age from 3-9 yr and total length from 287-394 mm. Of these 31 individuals, 27 were morphologically similar to <em>C. artedi manitoulinus</em>, a subspecies of cisco found in the North Channel; however, four individuals more closely resembled cisco captured in other areas of Lake Huron. These findings represent the best evidence of tributary spawning by cisco since the 1880s, and they have important implications for coregonine conservation and restoration efforts. Ongoing work aims to augment our understanding of the ecological and evolutionary importance of this population.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"50 6","pages":"Article 102421"},"PeriodicalIF":2.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142059","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

Integrated water quality assessment of open water bodies using empirical equations and remote sensing techniques in Bangweulu Wetland lakes, Zambia 基于经验方程和遥感技术的赞比亚Bangweulu湿地湖泊开放水体水质综合评价

IF 2.4 3区环境科学与生态学

Journal of Great Lakes Research Pub Date : 2024-12-01 DOI: 10.1016/j.jglr.2024.102451

Misheck Lesa Chundu, Kawawa Banda, Henry M. Sichingabula, Imasiku A. Nyambe

{"title":"Integrated water quality assessment of open water bodies using empirical equations and remote sensing techniques in Bangweulu Wetland lakes, Zambia","authors":"Misheck Lesa Chundu, Kawawa Banda, Henry M. Sichingabula, Imasiku A. Nyambe","doi":"10.1016/j.jglr.2024.102451","DOIUrl":"10.1016/j.jglr.2024.102451","url":null,"abstract":"<div><div>Water quality assessment is essential for conserving aquatic ecosystems and human consumption. However, monitoring several water quality parameters in open water bodies poses significant challenges, resulting in gaps and limitations. While the Water Quality Index (WQI) integrates various water quality parameters, its spatial application has not yet been thoroughly evaluated. To address these issues, this study was conducted to establish an integrated remote sensing approach for comprehensive monitoring of water quality. Utilising Sentinel 2 data alongside on-site/lab water quality measurements, various relationships were established. The calculated mean WQI from on-site/lab data was 35, while from remotely sensed data was 41. Linear relationships (R<sup>2</sup>) between WQI and various water quality parameters such as chloride (0.712), sodium (0.705), TDS (0.705), turbidity (0.628), and EC (0.704) were observed. These relationships facilitated the transformation of water quality parameter maps into WQI maps, the WQI maps were then integrated into one WQI map showing the overall water quality status of the Bangweulu Wetland lakes. Both on-site/lab and remote sensing methods indicated that the concentrations of water quality parameters in the Bangweulu Wetland lakes is lower (better) than the local and international recommended limits, with a calculated WQI falling within the ’Good’ category. This indicates that the water is fresh, clean, and suitable for various purposes including ecological preservation, agriculture, aquaculture, recreation, industrial use, and human consumption. The findings offer insights into the general status of water quality in open water bodies, identifying hot spots and potential sources of water pollution with implications for future management practices.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"50 6","pages":"Article 102451"},"PeriodicalIF":2.4,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143142061","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}

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