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

Centuries of change: Salinity and carbon dynamics in a large shallow lake 几个世纪的变化：一个大浅湖的盐度和碳动态

IF 2.5 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-12-01 DOI: 10.1016/j.jglr.2025.102685

Lajos Vörös , György István Tóth , Zsófia Látrányi-Lovász , Boglárka Somogyi

This study examines over a century of salinity changes in Lake Balaton, the largest shallow lake in Central Europe. Total ion concentrations have increased from a historical baseline of 450 mg/L to approximately 650 mg/L today, with an annual rise of 5.0 mg/L in the largest basin since the 1970s. Notable annual increases include magnesium (0.7 mg/L), sodium (0.6 mg/L), chloride (0.7 mg/L), sulfate (1.8 mg/L), and bicarbonate-carbonate ions (1.0 mg/L). In contrast, calcium levels have remained stable due to substantial calcite precipitation, which reduces the calcium content of inflowing waters by over half. Calcite precipitation in Lake Balaton varies significantly, ranging from 25,000 to 125,000 tons/year, with an average of 75,000 tons/year between 2010 and 2022. Biologically induced calcite precipitation, driven by photosynthesis, occurs seasonally during summer but dissolves again in autumn and winter. However, the majority of calcite precipitation is non-biogenic, driven by the equilibration of CO₂-supersaturated inflows with atmospheric CO₂. This process releases approximately 33,000 tons of CO₂ annually, underscoring Lake Balaton’s contribution to global carbon cycling. These findings highlight the combined impact of natural processes and anthropogenic influences on Lake Balaton’s salinity and biogeochemical dynamics, emphasizing its importance as a model for understanding the broader implications of freshwater salinization and carbon flux in shallow lakes.

这项研究调查了中欧最大的浅湖巴拉顿湖一个多世纪以来的盐度变化。总离子浓度从历史基线450 mg/L增加到今天的约650 mg/L，自20世纪70年代以来，最大的盆地每年增加5.0 mg/L。值得注意的年度增长包括镁（0.7 mg/L）、钠（0.6 mg/L）、氯（0.7 mg/L）、硫酸盐（1.8 mg/L）和碳酸氢盐-碳酸盐离子（1.0 mg/L）。相比之下，由于大量方解石沉淀，钙含量保持稳定，这使流入水中的钙含量减少了一半以上。巴拉顿湖方解石降水量变化显著，在2.5万吨至12.5万吨/年之间，2010年至2022年平均为7.5万吨/年。由光合作用驱动的生物诱导方解石降水在夏季季节性发生，但在秋季和冬季再次溶解。然而，大多数方解石降水是非生物成因的，是由CO2过饱和流入与大气CO2平衡驱动的。这一过程每年释放约33,000吨二氧化碳，凸显了巴拉顿湖对全球碳循环的贡献。这些发现强调了自然过程和人为影响对巴拉顿湖盐度和生物地球化学动力学的综合影响，强调了它作为理解浅湖淡水盐碱化和碳通量更广泛影响的模型的重要性。

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引用次数: 0

Detroit River becoming a crucible for boundary organization experimentation 底特律河成为边界组织实验的熔炉

IF 2.5 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-12-01 DOI: 10.1016/j.jglr.2025.102645

John H. Hartig , Robin L. DeBruyne , Katie Stammler , James C. Boase , Edward F. Roseman

The Detroit River has a long history of human use and abuse, resulting in public outcry over water pollution and resource degradation. This public outcry helped catalyze the enactment of many laws and the Canada-U.S. Great Lakes Water Quality Agreement which led to enhanced research, monitoring, and water pollution control. As pollution from industries and municipal wastewater treatment plants came under control and progress was made in management of single species, the focus shifted to a more comprehensive ecosystem approach that accounted for all the sources of pollution and targeted restoring ecosystem health with resilience. Over time, the Detroit River became a “proving ground” or crucible for experimenting with boundary organizations to overcome geographical, political, institutional, and disciplinary boundaries and strengthen science-policy-management linkages for ecosystem-based management. This study identified 15 boundary organizations functioning in the Detroit River watershed and evaluated two case studies – St. Clair-Detroit River System Initiative and State of the Strait Conferences. Key lessons learned from this study include: 1) establishing boundary organizations, promoting cooperative learning, and building capacity for boundary-spanning are essential for use of an ecosystem approach; 2) boundary spanning requires specific skills, experience, and improved linkages between research and practice; 3) the 15 boundary organizations provide a unique opportunity to collaborate in a community of practice to share knowledge, foster cooperative learning, enhance problem-solving, build trust, and demonstrate leadership; and 4) continued actionable science, investment in capacity building, and cooperative learning are essential to meet long-term goals of sustainability.

底特律河有很长的人类使用和滥用历史，导致公众对水污染和资源退化的强烈抗议。公众的强烈抗议推动了许多法律的制定，并促成了加拿大和美国的合作。大湖水质协议，该协议加强了研究、监测和水污染控制。随着工业污染和城市污水处理厂污染得到控制以及单一物种管理取得进展，重点转向了更全面的生态系统方法，该方法考虑了所有污染源，并以恢复生态系统健康为目标。随着时间的推移，底特律河成为了一个“试验场”或熔炉，用于边界组织的试验，以克服地理、政治、制度和学科的界限，并加强科学-政策-管理的联系，以实现基于生态系统的管理。本研究确定了在底特律河流域运作的15个边界组织，并评估了两个案例研究-圣克莱尔-底特律河系统倡议和海峡国家会议。本研究的主要经验包括：1)建立边界组织、促进合作学习和建立跨边界能力是使用生态系统方法的必要条件；2)跨界需要特定的技能、经验和研究与实践之间更好的联系；3) 15个边界组织提供了一个独特的机会，在一个实践社区中合作，分享知识，促进合作学习，提高解决问题的能力，建立信任，并展示领导力；4)持续的可操作科学、能力建设投资和合作学习对于实现可持续发展的长期目标至关重要。

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引用次数: 0

St. Lawrence River Strategy: Connecting community for a beautiful and healthy Kaniatarowanenneh 圣劳伦斯河战略：连接社区，打造美丽健康的Kaniatarowanenneh

IF 2.5 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-12-01 DOI: 10.1016/j.jglr.2025.102602

Emilie DeRochie , Abraham Francis , Georgia Bock , Kayla Sunday , Britney Bourdages , Elsie Lewison , Yanik Rozon , Erin D. Smith , Mary Ann Perron , Stephany Hildebrand , Leigh McGaughey

The challenges of responding to complex environmental issues and widespread environmental injustice have led to calls for greater collaborative engagement and participation in environmental management and knowledge production. The need for innovative approaches to collaboration and participation is particularly relevant in the context of transboundary systems, like that of the Kaniatarowanenneh (St. Lawrence River), which spans the borders dividing Canada, the United States, Indigenous nations, and three states/provinces. Like many large, transboundary waterbodies, the St. Lawrence River has been impacted by a range of environmental stressors, including large-scale hydrological transformations, pollution, invasive species, and habitat degradation from land and water use. In response, various actors, including Indigenous and non-Indigenous government agencies, academic researchers, community groups, and non-profit organizations, have been involved in monitoring and restoration projects along the river. For over a decade, however, local and regional groups and organizations have also identified a need for new, more inclusive and flexible frameworks for cooperation and participation to address environmental challenges, particularly along the upper section of the river. The Kahnekarónnion (River) Strategy was launched in 2023 to help address this need, with the overarching goal of facilitating inclusive and equitable communication and collaboration along the St. Lawrence River and beyond. Here we describe the development of this collective and its basis in Haudenosaunee approaches to collaboration. We also outline some emergent guiding principles and their alignment with best practices identified in the literature on participation and knowledge co-production.

应对复杂的环境问题和广泛的环境不公正现象所面临的挑战，促使人们呼吁在环境管理和知识生产方面加强合作和参与。在跨界系统的背景下，需要创新的合作和参与方法，例如横跨加拿大、美国、土著民族和三个州/省边界的圣劳伦斯河（Kaniatarowanenneh）。与许多大型跨界水体一样，圣劳伦斯河也受到一系列环境压力因素的影响，包括大规模水文变化、污染、入侵物种以及土地和水资源利用导致的栖息地退化。作为回应，包括土著和非土著政府机构、学术研究人员、社区团体和非营利组织在内的各种行动者都参与了沿河的监测和恢复项目。然而，十多年来，地方和区域团体和组织也认识到，需要建立新的、更具包容性和灵活性的合作与参与框架，以应对环境挑战，特别是在河流上游地区。Kahnekarónnion（河流）战略于2023年启动，旨在帮助解决这一需求，其总体目标是促进圣劳伦斯河沿岸及其他地区包容和公平的沟通与合作。在这里，我们描述了这个集体的发展及其在豪德诺索尼合作方法中的基础。我们还概述了一些新兴的指导原则，以及它们与有关参与和知识共同生产的文献中确定的最佳实践的一致性。

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引用次数: 0

Effects of artificial illumination and net panel configurations on small pelagic fisheries and bycatch on Lake Albert, East Africa 人工照明和网板配置对东非艾伯特湖小型中上层渔业和副渔获物的影响

IF 2.5 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-12-01 DOI: 10.1016/j.jglr.2025.102690

Herbert Nakiyende , Jackson Efitre , Anthony Basooma , Dismas Mbabazi , Anthony Taabu-Munyaho , Winnie Nkalubo , Gladys Bwanika , Mulowoza Alex , Mudondo Phelister , Samuel Bassa , Lauren Chapman

Small pelagic fisheries are crucial for socio-economic development, yet their sustainable management in multi-species ecosystems like Lake Albert is challenged by user conflicts, particularly between pelagic and demersal fishers. These tensions are largely fueled by unverified perceptions surrounding the ecological impacts of light-based small pelagic species (SPS) fisheries, including bycatch and net-panel configurations. This study provides empirical evidence to inform management decisions that support coexistence within the lake’s multi-species fishery. We examined the effects of light type, intensity, and net stacking on catch rates of Engraulicypris bredoi and Brycinus nurse (belonging to orders Cypriniformes and Characiformes, respectively, and known locally as muziri and rogoogi), as well as the bycatch of economically important large-bodied species. Using kerosene lanterns and solar lights at varying intensities and net configurations, E. bredoi showed consistently higher catch rates (4.5–10 kg/net-haul/day) than B. nurse (2.5–5 kg/net-haul/day), with no significant differences across light types. Solar lights, however, enabled higher nightly catches due to increased operational efficiency. Bycatch, predominantly juvenile Nile perch (Lates niloticus), was significantly higher in shallow inshore habitats and increased with net stacking, from < 0.5 kg/boat/day (six panels) to 15 kg/boat/day (15 panels). These results highlight the need to regulate net-panel stacking and implement spatial strategies that shift SPS fishing offshore, protecting inshore nursery habitats. We recommend revising regulations to limit fishing depth to 16 m, promote solar light use, and establish long-term monitoring to support balanced and sustainable management.

小型远洋渔业对社会经济发展至关重要，但在阿尔伯特湖等多物种生态系统中，其可持续管理受到用户冲突的挑战，特别是在远洋渔民和底层渔民之间。这些紧张关系在很大程度上是由围绕光基小型远洋物种（SPS）渔业的生态影响的未经证实的看法所推动的，包括副渔获物和网板配置。本研究为支持湖泊内多物种渔业共存的管理决策提供了经验证据。我们研究了光照类型、光照强度和网堆对布氏小笼虾（分别属于鲤形目和特征目，在当地被称为muziri和rogoogi）和经济上重要的大型物种副渔获率的影响。使用的煤油灯照明和太阳能灯在不同强度和净配置,大肠bredoi显示更高的捕获率(4.5 -10公斤/ net-haul /天)比b .护士(2.5 5公斤/ net-haul /天),在光类型无显著差异。然而，由于操作效率的提高，太阳能灯的夜间捕获量更高。副渔获物主要为尼罗河鲈鱼幼鱼（Lates niloticus），在浅海近岸生境中显著增加，并随着网的堆积而增加，从0.5 kg/船/天（6块）增加到15 kg/船/天（15块）。这些结果强调需要规范网板堆叠，并实施将SPS捕捞转移到近海的空间策略，保护近海苗圃栖息地。我们建议修订法规，将捕捞深度限制在16米，促进太阳能的使用，并建立长期监测，以支持平衡和可持续的管理。

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引用次数: 0

Seasonal interplay of discharge and phosphorus concentration: Year-round areal loads to western basin Lake Ontario from urban and urbanizing tributaries 排放和磷浓度的季节相互作用：城市和城市化支流对西部盆地安大略湖的全年面积负荷

IF 2.5 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-12-01 DOI: 10.1016/j.jglr.2025.102665

Lauren Emily Barth , E. Todd Howell , Donald A. Jackson , Ryan J. Sorichetti , John Thibeau , Derek Smith , Calvin Hitch , Mike Smith , Georgina Kaltenecker

The export of phosphorus from watersheds to large temperate lakes is strongly linked to the seasonality of discharge from landscapes. Urbanization in watersheds alters flow dynamics and provides novel point and diffuse sources of nutrients, creating “fast landscapes” that augment nutrient export to receiving waters. Here, a combination of hydrologic event-based composite and baseflow grab sampling regimes were used at 13 Lake Ontario tributaries along a ∼ 140-km stretch of the Canadian shoreline from 2018 to 2023 to investigate seasonality in discharge, phosphorus, and suspended solid concentrations, and areal loads across watersheds that span a gradient of urbanization for southern Ontario. Rivers within watersheds with a higher degree of urbanization had elevated dissolved phosphorus (DP) concentrations (highest in warm seasons), areal discharge, and areal loads of DP, particulate phosphorus (PP), and suspended solids (SS) across all seasons. At the mixed-use and rural watershed rivers, export of DP, PP, and SS were chemodynamic with discharge, highest in spring and winter and relatively lower during summer and autumn months. The highly urbanized rivers likely have the greatest impact on Lake Ontario’s nearshore water quality as they provide a relatively consistent supply of phosphorus to the nearshore zone.

磷从流域向大型温带湖泊的出口与景观排放的季节性密切相关。流域的城市化改变了水流动力学，提供了新的点和分散的营养来源，创造了“快速景观”，增加了营养物质向接收水域的出口。在这里，从2018年到2023年，在沿着加拿大海岸线约140公里的13条安大略湖支流上使用了基于水文事件的复合和基流采集抽样制度，以调查横跨安大略省南部城市化梯度的流域的排放量、磷和悬浮固体浓度以及区域负荷的季节性。在城市化程度较高的流域内，河流的溶解磷（DP）浓度（在暖季最高）、DP、颗粒磷（PP）和悬浮固体（SS）的面积排放量和面积负荷在所有季节都有所增加。在混合利用河流和农村小流域，DP、PP和SS的输出随流量呈化学动态变化，春季和冬季最高，夏季和秋季相对较低。高度城市化的河流可能对安大略湖近岸水质的影响最大，因为它们为近岸地区提供了相对稳定的磷供应。

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引用次数: 0

Foreword: A summary of recent research on “Connecting Waters,” a special section of the Journal of Great Lakes Research 前言：《大湖研究杂志》特刊“连接水域”的最新研究总结

IF 2.5 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-12-01 DOI: 10.1016/j.jglr.2025.102699

Robin L. DeBruyne , Michael R. Twiss , Susan E. Doka , Edward F. Roseman

This special section highlights interjurisdictional and multidisciplinary approaches to research and management of natural resources in Great Lakes connecting waters (i.e., St. Marys River, Straits of Mackinac, St. Clair-Detroit River System (SCDRS), Niagara River, and St. Lawrence River). Historically, these systems possessed pristine water quality and resources that supported Indigenous communities and offered numerous archipelagoes, reefs, embayments, wetlands, and tributaries that provided vast amounts of habitat for people, fish, and wildlife. The riparian lands adjacent to these channels were desirable to European settlers who required water for large-scale transportation and industry. Over time, this led to degraded water quality and habitat loss from development, urbanization, industry and associated pollutants, hardened shorelines, flow regulation, and channel modification. Healthy relationships with, and recovery of, resources in connecting waters involves interjurisdictional cooperation and collaboration. This special section presents papers from the 2024 IAGLR Conference on Great Lakes Research in the “Water Quality, Ecosystem Services, and Beneficial Uses of Great Lakes Connecting Waters” session, and other relevant submitted papers, that showcase updates on status and concerns of water quality, contaminants, food webs, fish populations, and habitats, as well as socio-economic, physical, and biological assessments. This special section builds upon past work on Great Lakes connecting waters and highlights the ongoing research and attempts to manage environmental restoration activity.

这一特殊部分强调了在五大湖连接水域（即圣玛丽河、麦基诺海峡、圣克莱尔-底特律河系统（SCDRS）、尼亚加拉河和圣劳伦斯河）研究和管理自然资源的跨司法管辖和多学科方法。从历史上看，这些系统拥有原始的水质和资源，为土著社区提供了支持，并提供了无数的群岛、珊瑚礁、海湾、湿地和支流，为人类、鱼类和野生动物提供了大量的栖息地。毗邻这些水道的河岸土地对需要水来进行大规模运输和工业的欧洲定居者来说是理想的。随着时间的推移，这导致了水质的退化和栖息地的丧失，因为发展、城市化、工业和相关的污染物、硬化的海岸线、流量调节和河道改造。连接水域资源的健康关系和恢复涉及司法间的合作和协作。本专题部分介绍了来自2024年IAGLR大湖研究会议“水质、生态系统服务和大湖连接水域的有益利用”会议的论文，以及其他相关提交的论文，这些论文展示了水质、污染物、食物网、鱼类种群和栖息地的最新状况和关注，以及社会经济、物理和生物评估。这一特殊章节建立在过去关于五大湖连接水域的工作基础上，并强调了正在进行的研究和管理环境恢复活动的尝试。

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引用次数: 0

Characteristics of the black bass tournament fishery in eastern Lake Ontario and the St. Lawrence River 安大略湖东部和圣劳伦斯河黑鲈鱼比赛渔业的特点

IF 2.5 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-12-01 DOI: 10.1016/j.jglr.2025.102696

Connor W. Elliott , Alexander J. Row , Changhai Zhu , Rachael L. Hornsby , Patrick H. Wolf , Mark S. Ridgway , Bruce L. Tufts

The Laurentian Great Lakes provide unique challenges to obtain biological information for largemouth (Micropterus nigricans) and smallmouth (Micropterus dolomieu) bass. The scale of lake size, diversity of habitats, and varying management priorities limit the ability to efficiently sample black bass—the term collectively used to refer to the genus Micropterus—with traditional approaches. Competitive angling events targeting black bass utilize catch-and-release formats; however, some level of mortality typically persists. Sampling these mortalities can contribute additional biological data for assessment of the population, while also providing valuable scientific information about these events, which are a rapidly expanding component of Great Lakes fisheries. We used incidental mortalities collected from competitive angling events from 2012 to 2019 to obtain biological information from the largest adult fish in these populations and to gain insight into the growing tournament fishery in Lake Ontario and the St. Lawrence River. We relied on otoliths to accurately estimate the age of bass caught in tournaments where the average age was 8.5 years and the oldest fish was 21. Smallmouth bass were heavier and longer than largemouth bass, which leads to tournament anglers preferentially targeting smallmouth bass. Annual mortality for smallmouth bass was 33 %, with the rate of exploitation at 8.2 %, and 2005 was the only year exhibiting a relatively strong year class for smallmouth bass. During the 2021 season, at least 15,491 bass were weighed-in during tournaments, with events reporting an average of 2 % initial mortality. Tournament mortalities provide a valuable source of information to continue monitoring the biggest and oldest black bass in the Great Lakes.

劳伦森五大湖为获取大口黑鲈（Micropterus nigricans）和小嘴黑鲈（Micropterus dolomieu）的生物信息提供了独特的挑战。湖泊大小的规模、栖息地的多样性和不同的管理重点限制了用传统方法有效取样黑鲈的能力——黑鲈这个术语的统称是指小头鲈属。针对黑鲈鱼的竞技垂钓活动采用捕捉和释放的形式；然而，一定程度的死亡率通常会持续下去。对这些死亡进行抽样可以为种群评估提供额外的生物数据，同时也提供有关这些事件的宝贵科学信息，这些事件是五大湖渔业中迅速扩大的组成部分。我们利用从2012年至2019年的竞技垂钓活动中收集的意外死亡率，从这些种群中最大的成年鱼那里获得生物信息，并深入了解安大略湖和圣劳伦斯河日益增长的比赛渔业。我们依靠耳石来准确估计比赛中捕获的鲈鱼的年龄，平均年龄为8.5岁，最老的鱼为21岁。小口鲈鱼比大口鲈鱼更重、更长，这导致比赛垂钓者优先瞄准小口鲈鱼。小嘴鲈鱼的年死亡率为33%，捕捞率为8.2%，2005年是小嘴鲈鱼唯一表现出相对强劲的年份。在2021年的赛季中，至少有15491条鲈鱼在比赛期间被称重，比赛报告的平均初始死亡率为2%。比赛死亡率为继续监测五大湖最大和最老的黑鲈鱼提供了宝贵的信息来源。

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引用次数: 0

International aquatic invasive species early detection efforts in the St. Clair-Detroit River System: A decadal review 圣克莱尔-底特律河水系国际水生入侵物种早期检测工作：十年回顾

IF 2.5 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-12-01 DOI: 10.1016/j.jglr.2025.102531

Kristen Towne , Matthew Cowley , Mark D’Aguiar , Trisiah Tugade , Gregory Wright

The St. Clair-Detroit River System (SCDRS) makes up the connecting channel between lakes Huron and Erie and contains a wide variety of habitats and fish diversity. However, given its large population centers and its utility for tourism, recreational fishing and boating, and as an international shipping channel, this connecting waterway is also one of the most high-risk areas for new aquatic invasive species (AIS) introductions in the Laurentian Great Lakes Basin. Fisheries and Oceans Canada and the U.S. Fish and Wildlife Service have been conducting AIS early detection efforts in this area since 2013 to find these newly introduced species before they establish and cause harm. Both programs have undergone numerous changes over the last decade to increase the likelihood a new species will be detected soon after introduction, including sampling new locations, increasing expended effort, and targeted sampling protocols. These changes have led to captures of several non-established species in the SCDRS, such as rudd (Scardinius erythrophthalmus), Atlantic salmon (Salmo salar), and coho salmon (Oncorhynchus kisutch), as well as increases in two different invasive species early detection analysis metrics. The purpose of this review is to describe the two early detection programs implemented in the SCDRS, their evolutions over the last decade, and the impact of these adaptations on program success.

圣克莱尔-底特律河系统（SCDRS）构成了休伦湖和伊利湖之间的连接通道，包含了各种各样的栖息地和鱼类多样性。然而，鉴于其庞大的人口中心及其旅游，休闲钓鱼和划船的用途，以及作为国际航运通道，这条连接水道也是劳伦森大湖区新水生入侵物种（AIS）引入的高风险地区之一。自2013年以来，加拿大渔业和海洋部门以及美国鱼类和野生动物管理局一直在该地区开展AIS早期检测工作，以便在这些新引入的物种形成并造成伤害之前发现它们。在过去的十年中，这两个项目都经历了许多变化，以增加在引入后很快发现新物种的可能性，包括在新的地点采样，增加花费的精力和有针对性的采样协议。这些变化导致在SCDRS中捕获了一些未建立的物种，如红眼鲑（Scardinius erythrophthalmus），大西洋鲑鱼（Salmo salar）和河鲑（Oncorhynchus kisutch），以及两种不同的入侵物种早期检测分析指标的增加。本综述的目的是描述在SCDRS中实施的两个早期检测计划，它们在过去十年中的演变，以及这些适应对计划成功的影响。

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引用次数: 0

Comparison of Artificial Neural network (ANN) models and conventional GIS methods to interpolate high-resolution maps of sediment contamination in the Detroit River 人工神经网络（ANN）模型与传统GIS方法插值底特律河沉积物污染高分辨率地图的比较

IF 2.5 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-12-01 DOI: 10.1016/j.jglr.2025.102702

Mona Farhani , Alice Grgicak-Mannion , John Hartig , Samuel T. Noffke , Paul Weidman , Ken G. Drouillard

Deep learning Artificial Neural Network (DNN) models that included flow velocity, flow directionality, various positional inputs, and sediment total organic carbon (TOC) content as predictor variables were compared to conventional GIS interpolation for predicting sediment contamination of zinc (Zn), mercury (Hg), polychlorinated biphenyls (PCBs), and polycyclic aromatic hydrocarbons (PAHs) in the Detroit River Area of Concern (AOC). A sediment chemistry dataset of 500–850 sampling stations was split into training and validation data across 1000 splits. Universal kriging provided the best interpolation fits relative to other conventional GIS methods including inverse distance weighting and spline fitting. Parsimony-optimized ANN models explained more variation (43.0–58.4%) in validation data splits compared to kriging (19.7– 40.2%) and other GIS approaches. Kriging tended to overestimate contaminant concentrations, especially for areas containing low Hg and PCB levels. ANN performance was improved by adjusting predictions for U.S. restoration areas, non-U.S. restoration areas, and Canadian zones. High-resolution contaminant maps were generated for 9668 cells throughout the AOC. The two approaches showed differences in predicted sediment contamination distribution, with kriging predicting lower river-wide Zn and Hg contamination and higher PCB and PAH contamination. ANNs generated more discrete contaminant hot zones, indicating strong nearshore gradients along the U.S. shoreline and low concentrations in fast moving navigation channels. Given the superior performance of ANNs, this approach was considered a superior interpolation method, with potential applications for guiding future sediment restoration initiatives in the AOC.

将深度学习人工神经网络（DNN）模型（包括流速、流向、各种位置输入和沉积物总有机碳（TOC）含量作为预测变量）与传统GIS插值模型进行比较，以预测底特律河关注区（AOC）沉积物中锌（Zn）、汞（Hg）、多氯联苯（pcb）和多环芳烃（PAHs）的污染。将500-850个采样站的沉积物化学数据集分成1000个采样点的训练和验证数据。通用克里格提供了最好的插值拟合相对于其他传统的GIS方法，包括逆距离加权和样条拟合。与kriging（19.7 - 40.2%）和其他GIS方法相比，简约优化的ANN模型在验证数据分割中解释了更多的变化（43.0-58.4%）。克里格倾向于高估污染物浓度，特别是在汞和多氯联苯含量较低的地区。通过调整美国恢复区域、非美国恢复区域的预测，人工神经网络的性能得到了改善。修复区和加拿大地区。在整个AOC中生成了9668个细胞的高分辨率污染物图。两种方法在预测沉积物污染分布方面存在差异，克里格法预测的全河Zn和Hg污染较低，PCB和PAH污染较高。人工神经网络产生了更多离散的污染物热区，表明沿美国海岸线的近岸梯度很强，而快速移动的航道浓度较低。鉴于人工神经网络的优越性能，该方法被认为是一种优越的插值方法，具有指导未来AOC沉积物恢复措施的潜在应用前景。

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引用次数: 0

Locally produced fish food pellets yield little evidence as a dietary substrate for net pen-reared Nile tilapia (Oreochromis niloticus) in Lake Victoria, Kenya 在肯尼亚维多利亚湖，当地生产的鱼食颗粒作为网眼养殖尼罗罗非鱼的膳食基质的证据很少

IF 2.5 3区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Great Lakes Research

Pub Date : 2025-12-01 DOI: 10.1016/j.jglr.2025.102686

Dennis Otieno , Job Mwamburi , Lewis Sitoki , Reuben Omondi , Anakalo Shitandi , Bethwell Owuor , George Bullerjahn , Kefa Otiso , R. Michael McKay , Ken Drouillard , NSF-IRES Lake Victoria Research Consortium

Net pen-reared Nile tilapia (Oreochromis niloticus) and samples of fish food provisioned to fish cages were collected from two aquaculture facilities operated in Winam Gulf, Lake Victoria, and another open lake site on Lake Victoria, Kenya. Samples of fish food and net pen-reared fish were analyzed for stable isotopes and total mercury (THg) concentrations. Values of δ¹³C in net-pen fish were 9.4–12.7 ‰ higher compared to values in provisioned food. Values of δ¹⁵N in fish were 5.36–5.66 ‰ above those measured in the provisioned food at two fish cage facilities in Winam Gulf but not significantly different from one another at the open lake facility. Stable isotopes and THg in aquaculture fish from Winam Gulf were compared against wild-caught lower food web samples from the same region. Residues of THg and δ¹⁵N in net-pen fish were similar to wild conspecifics from Winam Gulf. Values of δ¹³C tended to be elevated in net pen-reared fish compared to wild conspecifics but found to be within the range of δ¹³C values measured in lower trophic level freshwater shrimp (Caridina niloticus) collected from diverse locations throughout Winam Gulf. Overall, isotope signatures of net pen-reared fish and food provisioned to cages were dissimilar, whereas stable isotope signatures and THg in net-pen fish resembled patterns observed in wild-caught Nile tilapia and other lower food web items from Winam Gulf. The results imply net pen-reared fish are not benefiting from food provisioning and that aquaculture operators could realize economic benefits and lower their environmental impacts by reducing food provisioning rates.

从维多利亚湖Winam湾的两个水产养殖设施和肯尼亚维多利亚湖的另一个开放湖泊场地收集了网养尼罗罗非鱼（Oreochromis niloticus）和提供给网箱的鱼食样本。分析了鱼食和网笼养殖鱼的稳定同位素和总汞（THg）浓度。网笼鱼体内的δ13C值比饲料中高9.4 ~ 12.7‰。温南湾两个网箱设施的鱼体δ15N值比提供食物的δ15N值高5.36 ~ 5.66‰，而开放湖设施的鱼体δ15N值差异不显著。将温南湾水产养殖鱼类的稳定同位素和THg与同一地区野生捕获的下层食物网样本进行了比较。网笼鱼体内THg和δ15N的残留量与温南湾野生同种鱼相似。与野生异种鱼相比，网圈养殖鱼的δ13C值有升高的趋势，但在整个Winam海湾不同地点采集的低营养级淡水对虾（Caridina niloticus）的δ13C值在范围内。总体而言，笼养鱼和笼养食物的同位素特征不同，而笼养鱼的稳定同位素特征和THg与野生捕获的尼罗罗非鱼和其他来自Winam湾的较低食物网项目相似。结果表明，网笼养殖的鱼类没有从粮食供应中受益，水产养殖经营者可以通过降低粮食供应率来实现经济效益并降低其对环境的影响。

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引用次数: 0