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

Growth of starry stonewort (Nitellopsis obtusa (Desvaux) J. Groves, Characeae) in two Michigan, USA, drowned river mouth lakes 星形石草（Nitellopsis obtusa (Desvaux) J. Groves, chareae）在美国密歇根州两个被淹没的河口湖泊中的生长

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.2025.102687

Emily K. Moore , Brooke L. Keck , Kenneth G. Karol , Sean A. Woznicki , Sarah E. Hamsher

Starry stonewort (Nitellopsis obtusa (Desvaux) J. Groves) is an invasive freshwater green macroalga in North America that is widespread in the Laurentian Great Lakes Basin and forms thick monotypic meadows in littoral zones. However, little is known about its development throughout the growing season. The objectives of this study were to document the growth and development of N. obtusa in two Lake Michigan drowned river mouth lakes and relate this growth to temperature, nutrients, and other submerged aquatic vegetation. These lakes are significant because they serve as direct connections from the landscape to the Great Lakes system and offer pathways for further range expansion of N. obtusa. Snorkel surveys were conducted in 2020 (biomass) and 2021 (reproductive structure development) at four sites that differed in management and use, three in Pentwater Lake and one in Muskegon Lake. Low biomass of N. obtusa was recorded in mid-July, with exponential growth through mid-August, and stabilization through late summer into October. Biomass was highest at the marina site, and the lowest relative biomass was recorded at the reference site. Water parameters did not explain the growth of N. obtusa well, but were consistent with prior studies. Male reproductive structures (antheridia) developed later than in the other study of N. obtusa in its native range, and females (oogonia) were not observed. Our study suggests N. obtusa growth patterns can differ among lakes and at sites within lakes; marinas should be targeted for management efforts to limit the spread of N. obtusa within and among lakes.

星形石藻（Nitellopsis obtusa (Desvaux) J. Groves）是一种入侵的北美淡水绿色大藻，广泛分布于劳伦森五大湖盆地，在沿岸地区形成厚的单型草甸。然而，人们对它在整个生长季节的发展知之甚少。本研究的目的是记录N. obtusa在两个密歇根湖被淹没的河口湖泊中的生长和发育，并将这种生长与温度、营养物质和其他淹没的水生植被联系起来。这些湖泊具有重要意义，因为它们是景观与五大湖系统之间的直接联系，并为黑桫椤的进一步扩展提供了途径。分别于2020年（生物量）和2021年（生殖结构发育）在四个管理和使用方式不同的地点进行了浮潜调查，其中三个在Pentwater湖，一个在Muskegon湖。7月中旬，黑桫椤生物量较低，8月中旬呈指数增长，夏末至10月生物量趋于稳定。码头样地的生物量最高，参考样地的相对生物量最低。水参数并不能很好地解释圆叶藻的生长，但与前人的研究结果一致。雄性生殖结构（肛门器）的发育晚于其他研究在其原生地的黑齿草，而雌性（卵原器）未被观察到。研究结果表明，不同湖泊和湖泊内不同地点的长尾草生长模式存在差异；应以码头为目标，进行管理工作，以限制长尾黑藻在湖泊内和湖泊间的传播。

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引用次数: 0

Developing the first binational dreissenid mussel biomass map for Lake Erie 开发伊利湖首份两国贻贝生物量图

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.2025.102652

Tyler J. Harrow-Lyle , Ashley K. Elgin , Mark D. Rowe , Peter J. Alsip , Lyubov E. Burlakova , Alexander Y. Karatayev , Megan McCusker , Reza Valipour , David C. Depew

Dreissena rostriformis bugensis and Dreissena polymorpha, collectively known as dreissenid mussels, were first documented in Lake Erie nearly 40 years ago and continue to strongly impact ecosystem structure and function. Recently, dreissenids have been recognized as the primary regulator of phosphorus dynamics in the Great Lakes, potentially reducing external phosphorus load management strategies. To evaluate the extent that dreissenids may modulate phosphorus dynamics and assess the effectiveness of external load management strategies, ecosystem models need to adequately represent spatial patterns of dreissenid biomass densities. Assessment of dreissenid populations in the Great Lakes are complicated by their vast size, as well as the heterogeneity and stochastic nature of critical physical variables that shape habitat suitability (e.g., depth, hypoxia, substrate type, and benthic shear stress). We used observations from a 2019 benthic survey and 10-fold cross validation to assess spatial prediction methods to create a spatially explicit data layer representing dreissenid biomass in Lake Erie, including inverse distance weighting, nearest neighbour, depth binned average, random forest, generalized linear, and general additive models. A random forest spatial prediction approach produced the best predictive surface for dreissenid biomass in Lake Erie. The estimated spatial pattern of dreissenid biomass may be used in nutrient modeling exercises across Lake Erie to improve estimates of dreissenid impacts on biogeochemistry and lower food web productivity. This work also provides insight for potential sampling design improvements for benthic surveys in future years that could help refine the predictive capacity of the developed spatial prediction framework.

Dreissena rostriformis bugensis和Dreissena polymorpha合称Dreissena贻贝，近40年前首次在伊利湖被发现，并继续对生态系统的结构和功能产生强烈影响。最近，dreissenids被认为是五大湖磷动态的主要调节剂，可能减少外部磷负荷管理策略。为了评估松蚌调节磷动态的程度和评估外部负荷管理策略的有效性，生态系统模型需要充分代表松蚌生物量密度的空间格局。由于大湖区的巨大规模，以及影响生境适宜性的关键物理变量（如深度、缺氧、基质类型和底栖生物剪切应力）的异质性和随机性，对大湖区德雷森德种群的评估变得复杂。我们使用2019年底栖生物调查的观察结果和10倍交叉验证来评估空间预测方法，以创建一个代表伊利湖德莱森生物量的空间显式数据层，包括逆距离加权、最近邻、深度均值、随机森林、广义线性和一般加性模型。采用随机森林空间预测方法对伊利湖水蛭生物量进行了预测。估算的德莱森生物量空间格局可用于整个伊利湖的养分模拟，以改进对德莱森对生物地球化学和低食物网生产力影响的估计。这项工作还为未来几年底栖生物调查的潜在采样设计改进提供了见解，这可能有助于完善已开发的空间预测框架的预测能力。

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引用次数: 0

The International Maritime Organization standard for ballast water reduces but does not eliminate establishment probability of a zooplankter in mesocosms 国际海事组织关于压载水的标准减少但不消除在中生态系统中存在浮游动物的可能性

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.2025.102688

Donn K. Branstrator , Courtney E. Larson , Euan D. Reavie , Matthew A. Etterson , Matthew C. TenEyck , Lana M. Fanberg

Ballast water is a leading vector of primary and secondary spread of nonindigenous aquatic invasive species in the Laurentian Great Lakes, prompting the development of regulatory standards to minimize its risk. We used large-scale mesocosms to evaluate the efficacy of the International Maritime Organization D-2 standard for ballast water pollution, which stipulates that treated ballast water must contain < 10 living individuals/m³ of water released for organisms ≥50 µm in minimum linear dimension. In a series of 2-week experiments with water sourced from the Duluth-Superior Harbor of Lake Superior, we evaluated population growth of the nonindigenous zooplankter Bythotrephes and used its reproductive output as the proxy for establishment probability. The resulting relationship between establishment probability (risk) and inoculation density (release) was nonlinear with risk declining notably for releases < 10 individuals/m³ and flattening toward an asymptote of 100 % risk for releases > 10 individuals/m³. We discuss the advantages and limitations of using mesocosms to evaluate the establishment probability of zooplankton.

压载水是劳伦森五大湖非本地水生入侵物种主要和次要传播媒介，促使制定监管标准以最大限度地降低其风险。我们使用大型中尺度系统来评估国际海事组织D-2压载水污染标准的有效性，该标准规定，处理后的压载水必须含有10个生命个体/m3，最小线性尺寸≥50µm的生物体释放的水。在为期2周的实验中，我们利用苏必利尔湖德卢斯-苏必利尔港的水源，评估了非本地浮游动物Bythotrephes的种群增长，并以其繁殖产量作为建立概率的代理。建立概率（风险）与接种密度（释放量）之间呈非线性关系，释放量≤10个体/m3时风险显著下降，释放量≤10个体/m3时风险趋于平缓，接近100%的渐近线。讨论了利用中生态系统评价浮游动物建立概率的优点和局限性。

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引用次数: 0

Seasonal and spatial patterns in phosphorus and nitrogen delivery: Implications for monitoring and management 磷和氮输送的季节和空间格局：对监测和管理的影响

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.2025.102581

M. Catherine Eimers , Jesse P. Anderson , Andrew M. Paterson , Andrew J. Williams , Diana Fred

There is growing recognition that management efforts to limit harmful algal bloom (HAB) production in lakes need to consider tributary loadings of both phosphorus (P) and nitrogen (N). This may be the case for Lake of the Woods (LoW), which experiences annual HABs, and has been historically monitored for P, but not N. Ongoing agricultural intensification within the basin, including expansion of tile-drained row crop production, is creating new sources of N that may be entering rivers to a greater extent in the winter/spring, when sampling is typically less frequent. To address this gap, we investigated seasonal P and N inputs to the Rainy River, the largest tributary that feeds the LoW, from seven tributaries that drain the Lower Rainy River basin. Total P (TP) concentrations were consistently high at all seven tributaries and exceeded water quality guidelines, and total Kjeldahl-N (TKN) levels, which include ammonium (NH₄-N) but largely reflect organic N, were also high relative to reference conditions for the region. In contrast, nitrate (NO₃-N) levels were generally low, especially in the growing season. Notably, NO₃-N, TKN, and TP concentrations were highest in tributaries with more agricultural development. There were no clear seasonal patterns in TP or TKN, whereas NO₃-N was up to 10 times higher in the winter compared with the growing season. Higher N losses from agricultural areas that were especially clear in the winter suggest that N export is sensitive to regional trends of agricultural intensification and winter warming and warrant increased scrutiny of N inputs to the basin.

越来越多的人认识到，限制湖泊有害藻华（HAB）产生的管理工作需要考虑支流的磷(P)和氮(N)负荷。森林湖（LoW）可能就是这种情况，它每年都会经历有害藻华，并且历史上一直监测P，但没有监测N。流域内持续的农业集约化，包括扩大瓦片排水的行作物生产，正在创造新的N来源，可能在冬季/春季更大程度上进入河流，那时采样通常不那么频繁。为了解决这一差距，我们调查了雨季河的季节性磷和氮输入，这是为低地提供水源的最大支流，来自下游雨季河流域的七条支流。7条支流的总磷（TP）浓度持续较高，超过水质标准，总凯氏氮（TKN）水平（包括铵（NH4-N），但主要反映有机氮）也相对于该地区的参考条件较高。硝态氮（NO3-N）水平普遍偏低，尤其是在生长季。农业发展程度越高的支流NO3-N、TKN和TP浓度最高。TP和TKN没有明显的季节变化规律，而NO3-N在冬季比生长期高10倍以上。农业地区的氮损失在冬季尤为明显，这表明氮出口对农业集约化和冬季变暖的区域趋势敏感，需要加强对流域氮输入的审查。

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引用次数: 0

Spatial and temporal variation in yellow perch (Perca flavescens) diet: Implications for growth 黄鲈（Perca flavescens）日粮的时空变化：对生长的影响

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.2025.102532

Travis L. Taylor , Tracy L. Galarowicz , Andrew S. Briggs , Kevin Pangle

Yellow perch (Perca flavescens) are an important sportfish in the Laurentian Great Lakes region and provide substantial economic benefit through recreational and commercial fishing. In Lake St. Clair, yellow perch growth has been decreasing, while yellow perch in nearby Great Lakes waters (western basin of Lake Erie and Saginaw Bay, Lake Huron) that experience similar conditions are not exhibiting the same length-at-age patterns. To effectively manage the Lake St. Clair yellow perch population, managers must determine and understand mechanisms causing declining growth. To evaluate potential mechanisms related to diet, yellow perch were collected in 2019 at multiple sites across three lakes, Lake St. Clair, Lake Erie, and Saginaw Bay, Lake Huron. Yellow perch stomach contents from each site were examined and identified to the lowest taxonomic level possible. Yellow perch in Lake St. Clair consumed more Ephemeroptera and fewer Amphipoda than yellow perch from the other sites. The Lake St. Clair yellow perch diets were also compared to historical samples collected in the same areas of Lake St. Clair at a time (1993) when growth was higher than present. In general, yellow perch collected in 2019 had fewer prey items, more empty stomachs, and showed a shift in diets dominated by Amphipoda and Isopoda in 1993 to Ephemeroptera in 2019. We used bioenergetics modeling to examine changes in growth between 1993 and 2019. Our results suggest that the decline in yellow perch growth may be related to changing prey availability in Lake St. Clair.

黄鲈（pera flavescens）是Laurentian大湖地区重要的运动鱼类，通过休闲和商业捕捞提供了可观的经济效益。在圣克莱尔湖，黄鲈鱼的生长一直在减少，而在附近的五大湖水域（伊利湖西部盆地和休伦湖的萨吉诺湾），黄鲈鱼经历了类似的条件，却没有表现出相同的长度-年龄模式。为了有效地管理圣克莱尔湖黄鲈种群，管理人员必须确定并了解导致增长下降的机制。为了评估与饮食相关的潜在机制，2019年在三个湖泊的多个地点收集了黄鲈，分别是圣克莱尔湖、伊利湖和休伦湖的萨吉诺湾。每个地点的黄鲈胃内容物都被检查并鉴定到最低的分类水平。圣克莱尔湖的黄鲈对蜉蝣目的摄取量高于其他地点的黄鲈，对片足类的摄取量低于其他地点的黄鲈。还将圣克莱尔湖黄鲈饲料与在圣克莱尔湖同一地区收集的历史样本进行了比较，当时（1993年）的生长速度高于现在。总体而言，2019年收集的黄鲈的猎物较少，空腹较多，并且从1993年的两栖类和等足类为主转向2019年的蜉蝣目为主。我们使用生物能量学模型来研究1993年至2019年之间的生长变化。我们的研究结果表明，圣克莱尔湖黄鲈生长的下降可能与猎物可用性的变化有关。

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引用次数: 0

Mass balance modeling highlights the role of the littoral zone in modulating the cycling of phosphorus in a large, multi-basin lake (Lake Erie) 质量平衡模型强调了沿海带在调节大型多流域湖泊（伊利湖）中磷循环中的作用。

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.2025.102695

Zahra Akbarzadeh , Serghei A. Bocaniov , Helen Powley , Kevin G. Lamb , Philippe Van Cappellen

Excess land-derived input of phosphorus (P) is generally considered the primary driver of eutrophication symptoms in large lakes, including Lake Erie, one of the Laurentian Great Lakes. Here, we present a regionalized P mass balance model for Lake Erie’s three basins (western, central, and eastern) that explicitly accounts for the decadal circulation of the lake and P fluxes into and out of the lake’s nearshore (littoral) zones. The model comprises 11 water column compartments, including both nearshore and offshore compartments, as well as a further partitioning of the offshore waters between surface and deep-water compartments. External P loads to the lake, plus water fluxes into and out of the different lake compartments were averaged over the 2003–2016 period and imposed to the model. According to the steady state baseline simulations, 85% of total P (TP) flowing out of the western basin of Lake Erie enters the lake’s central basin along the nearshore zone. Moreover, transport parallel to the coastline, both on the northern (Canada) and southern (USA) sides of the central basin, represents the major pathway for the continued eastward movement of P to the eastern basin and, ultimately, to the outflow discharging in downstream Lake Ontario. The results further underscore (1) the importance of shoreline erosion as a TP input to the littoral zone, especially along the Canadian side of Lake Erie’s central basin, (2) the complex, bi-directional P exchanges between nearshore and offshore waters in the central and eastern basins, and (3) the sensitivity of these exchanges to the lake’s general circulation regime.

通常认为，来自陆地的磷(P)输入过量是大型湖泊富营养化症状的主要驱动因素，包括劳伦森五大湖之一的伊利湖。在这里，我们提出了一个区域化的伊利湖三个盆地（西部、中部和东部）的P质量平衡模型，该模型明确地说明了湖泊的年代际环流和进出湖泊近岸（沿岸）带的P通量。该模型包括11个水柱隔室，包括近岸和近海隔室，并进一步将近海水域划分为表层和深水隔室。在2003-2016年期间，对湖泊的外部P负荷以及进出不同湖泊的水通量进行了平均，并将其施加到模型中。根据稳态基线模拟，伊利湖西部盆地流出的总磷（TP）中有85%沿近岸带进入伊利湖中部盆地。此外，在中部盆地的北（加拿大）和南（美国）两侧，与海岸线平行的运输代表了P继续向东移动到东部盆地并最终向下游安大略湖流出的主要途径。研究结果进一步强调了(1)岸线侵蚀作为TP输入的重要性，特别是伊利湖中部盆地加拿大一侧；(2)中部和东部盆地近岸和近海水域之间复杂的双向P交换；(3)这些交换对湖泊总体环流的敏感性。

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引用次数: 0

Five decades of smallmouth bass monitoring reveal the potential benefits of catch-and-release angling practices in a Great Lakes connecting water 五十年来对小嘴鲈鱼的监测揭示了在五大湖连接水域进行捕捞和释放垂钓的潜在好处

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.2025.102534

Jan-Michael Hessenauer, Brad Utrup, Andrew Briggs, Todd Wills

The connecting channels of the Laurentian Great Lakes provide socially and economically important fisheries. The St. Clair – Detroit River System, which connects the upper and lower Great Lakes, provides world-class recreational fishing opportunities for several popular sport fishes. These fisheries have been shaped by a wide range of anthropogenic modification and use of the Great Lakes as well as the introduction and subsequent ecological effects of invasive species such as dreissenid mussels (Dreissena spp.) and round goby (Neogobius melanostomus). Smallmouth bass (Micropterus dolomieu) are among the most popular sportfish species in Lake St. Clair. The Michigan Department of Natural Resources has been monitoring smallmouth bass populations since 1972 over two intensive sampling periods, 1972–1985 and 2002–2023. During the later period, improvements in population size structure have been observed, transforming the fishery into one comprising many larger individuals. Our objective was to analyze trends in smallmouth bass population relative abundance, growth rates, and mortality during two intensive sampling periods to better understand the changes in population size structure. Linear regression was performed for fishery metrics separately for the early (1972–1985) and late (2002–2023) sample periods, and the slopes of those regressions were compared to evaluate changes in population trajectory. Significantly different slopes for proportional size distribution of larger individuals existed between the early and late periods. Catch-per-unit effort did not differ between the early and late periods, though biomass caught per unit effort did. Growth rates changed at a similar rate between the early and late period. Mortality decreased at a steady rate across the study, with no change between the early and late time periods. We concluded that a long-term decreasing trend in mortality is likely the largest driver in improved size structure shaping the trophy smallmouth bass fishery that exists today.

劳伦森五大湖相连的河道提供了重要的社会和经济渔业资源。圣克莱尔-底特律河系统，连接上下五大湖，提供了世界级的休闲钓鱼的机会，几种流行的运动鱼。这些渔业是由大范围的人为改造和对五大湖的利用以及入侵物种的引入和随后的生态影响所形成的，这些入侵物种如德莱森贻贝和圆虾虎鱼（Neogobius melanostomus）。小口鲈鱼（Micropterus dolomieu）是圣克莱尔湖最受欢迎的运动鱼类之一。自1972年以来，密歇根州自然资源部通过1972 - 1985年和2002-2023年两个密集采样期一直在监测小嘴鲈鱼的种群。在后期，观察到种群规模结构的改善，将渔业转变为由许多较大个体组成的渔业。我们的目的是分析小嘴黑鲈种群在两个密集采样期间的相对丰度、生长率和死亡率的变化趋势，以更好地了解种群规模结构的变化。分别对早期（1972-1985年）和后期（2002-2023年）的渔业指标进行线性回归，并比较这些回归的斜率来评估种群轨迹的变化。前期和后期较大个体的比例尺寸分布斜率存在显著差异。单位渔获量在早期和后期没有差异，但单位渔获量有差异。在早期和后期，增长率以相似的速度变化。在整个研究过程中，死亡率以稳定的速度下降，在早期和晚期之间没有变化。我们的结论是，死亡率的长期下降趋势可能是改善尺寸结构的最大驱动因素，形成了今天存在的小口黑鲈渔业。

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引用次数: 0

Larval fish export in response to altered discharge in the St. Marys river rapids 在圣玛丽河激流中，由于流量改变，小鱼出口

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.2025.102659

Signe F.K. Van Drunen , Mark R. DuFour , Edward F. Roseman , Robin L. DeBruyne , Ashley H. Moerke , Hal Harrington , Timothy J. Calappi , Kevin N. McDonnell , Brandon S. Gerig

The St. Marys River (SMR) forms the border between Michigan, USA, and Ontario, Canada, connecting lakes Superior and Huron. Discharge is controlled by a 16-gate water control structure upstream of the SMR rapids. The SMR rapids are a critical spawning habitat in the Great Lakes, yet the influence of regulated discharge on larval fish export remains poorly understood. From 2018 to 2021, larval fish were sampled across four locations to assess community composition and export dynamics under varying discharge releases. Rainbow smelt (Osmerus mordax) dominated catches (87.9 %), followed by species in the family Leuciscidae (i.e., native minnows) and burbot (Lota lota). Larval densities were strongly influenced by water temperature and, to a lesser extent, discharge. Bayesian state-space models estimated a total export of ∼ 41.3 million larvae from the rapids across 3 years, with the highest export in 2019. Rainbow smelt larvae exhibited peak densities at intermediate flows (300–600 m³ s⁻¹) and temperatures (∼18–19 °C), while non-rainbow smelt taxa showed species-specific, less consistent responses. Nighttime sampling consistently yielded higher larval densities. Export estimates varied by analysis but both manual and Bayesian approaches captured similar interannual and taxonomic trends. Despite past expectations, the larval community was largely composed of prey species, with limited representation of lake sturgeon (Acipenser fulvescens), lake whitefish (Coregonus clupeaformis), or walleye (Sander vitreus). These results suggest the SMR rapids currently support significant forage fish production and highlight the importance of discharge and temperature in structuring larval export.

圣玛丽河（SMR）形成了美国密歇根州和加拿大安大略省之间的边界，连接着苏必利尔湖和休伦湖。流量由SMR激流上游的16门水控结构控制。SMR急流是五大湖重要的产卵栖息地，但管制排放对幼鱼出口的影响仍然知之甚少。从2018年到2021年，在四个地点取样了仔鱼，以评估不同排放释放下的群落组成和出口动态。彩虹鱼（Osmerus mordax）的渔获量最多（87.9%），其次是淡鱼科（即本地鲦鱼）和白鲑（Lota Lota）。水温对幼虫密度影响较大，流量对幼虫密度影响较小。贝叶斯状态空间模型估计，三年内急流的总出口量为4130万只，2019年的出口量最高。彩虹鱼幼虫在中等流量（300-600 m3 s−1）和温度（~ 18-19°C）下表现出峰值密度，而非彩虹鱼分类群表现出物种特异性，不太一致的响应。夜间取样始终产生较高的幼虫密度。出口估计因分析而异，但人工和贝叶斯方法都捕获了类似的年际和分类趋势。与过去的预期不同，幼虫群落主要由猎物物种组成，有限的代表是湖鲟（Acipenser fulvescens），湖白鱼（Coregonus clupeaformis）或白眼（Sander vitreus）。这些结果表明，SMR急流目前支持重要的饲料鱼生产，并突出了流量和温度在结构幼虫出口中的重要性。

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引用次数: 0

Climate change impacts on hydrology and phosphorus loads under projected global warming levels for the Lake of the Woods watershed 气候变化对预测全球变暖水平下森林湖流域水文和磷负荷的影响

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

Journal of Great Lakes Research

Pub Date : 2025-10-01 DOI: 10.1016/j.jglr.2025.102636

Phil Fong , Rajesh R. Shrestha , Yongbo Liu , Reza Valipour

Climate change and variability could directly impact inflows and nutrients from the watershed into Lake of the Woods (LoW), which has been experiencing seasonal algal blooms with a shift in community composition of bloom species mostly to toxin species over the past decades. The main contributing factor to these blooms is deemed to be external inflowing total phosphorus (TP) mostly from the Rainy River. Here, we advance our understanding of potential impacts of climate change on streamflow and non-point source (NPS) TP in the LoW watershed. To this end and for the first time, we developed LoW watershed CanSWAT (Soil and Water Assessment Tool) models forced with climate projections from seven downscaled Coupled Model Intercomparison Project Phase 6 Global Climate Models under two Shared Socioeconomic Pathways. We analyzed hydrological and water quality change at policy-relevant +1.5 to +3.0 °C Global Mean Temperature (GMT) above the pre-industrial period. Under 1.5–3.0 °C GMT increases, projected mean runoff (NPS TP) is 7.3–36.6 % (1.5–117.6 %) and 7.5–31.7 % (−1.6 to 81.4 %) higher than the 1980–2010 reference period in winter/spring in the Precambrian Shield and Agassiz zone, respectively; and lower in summer (−3.0 to −18.8 % (−0.01 to −20.1 %) for both regions). Changes in mean annual Rainy River NPS TP range from −1.8 to 3.1 %. Furthermore, there is a shift in seasonal delivery of NPS TP loads to LoW with winter/spring increases (3.5–26.8 %) and summer/autumn reductions (−0.01 to −14.8 %), which could potentially affect algal productivity and general water quality in LoW. These findings provide important insights to inform future water quality and nutrient management plans.

气候变化和多变性可能直接影响从流域流入森林湖（LoW）的流入和营养物质，在过去的几十年里，森林湖一直在经历季节性的藻华，藻华物种的群落组成主要转变为毒素物种。造成这些水华的主要因素被认为是外部流入的总磷（TP），主要来自雨河。在此基础上，我们进一步了解了气候变化对低流域径流和非点源TP的潜在影响。为此，我们首次开发了低流域CanSWAT（水土评估工具）模型，该模型采用了7个缩小规模的耦合模式比对项目第6阶段全球气候模型在两种共享社会经济路径下的气候预测结果。我们分析了与政策相关的全球平均温度（GMT）高于工业化前时期+1.5至+3.0°C时的水文和水质变化。升温1.5 ~ 3.0℃时，预估前寒武纪地盾区冬季/春季平均径流（NPS TP）比1980 ~ 2010年基准期分别高7.3 ~ 36.6%（1.5 ~ 117.6%）和7.5 ~ 31.7% (- 1.6 ~ 81.4%)；夏季较低，为- 3.0 ~ - 18.8%（- 0.01 ~ - 20.1%）。年平均雨河NPS TP的变化范围为- 1.8%至3.1%。此外，NPS总磷负荷在季节上向LoW转移，冬/春增加（3.5% - 26.8%），夏/秋减少（- 0.01 - - 14.8%），这可能会影响LoW的藻类生产力和总体水质。这些发现为未来的水质和营养管理计划提供了重要的见解。

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引用次数: 0

Emigration probabilities and survival estimates of stocked juvenile lake sturgeon (Acipenser fulvescens) within the Genesee River, NY 纽约杰纳西河内放养湖鲟幼鱼的洄游概率和生存估计

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

Journal of Great Lakes Research

Pub Date : 2025-10-01 DOI: 10.1016/j.jglr.2025.102656

Kyle T. Morton , Dimitry Gorsky , Dawn Dittman , Matthew E. Altenritter

Knowledge of juvenile lake sturgeon (Acipenser fulvescens) survival is important both to understanding changes in population abundance and for assessing the efficacy of management practices like stocking. High mortality rates of juvenile fish are partially mitigated by stocking hatchery-raised individuals; however, survival of post-stocked lake sturgeon remains lower compared to survival at older life stages. In this study, acoustic telemetry data from 69 age-0+ (weight:

\bar{x}

= 29 g, range = 2–41 g; length:

\bar{x}

= 198 mm, range = 176–223 mm) and 30 sub-adults (weight:

\bar{x}

= 2144 g, range = 1100–7020 g; length:

\bar{x}

= 751 mm, range = 605–1020 mm) tagged in the fall of 2019 and 2020 were utilized to construct a multi-state model used to estimate both survival and spatial transitions between the Genesee River and Lake Ontario. Sub-adults (approximate ages: 4–7 years) had estimated survival rates exceeding 88 % in both the Genesee River and Lake Ontario. Age-0+ lake sturgeon displayed much lower survival rates that ranged between 31 % (Lake Ontario) and 77 % (Genesee River). Both age-0+ and sub-adults lake sturgeon were most likely to leave the Genesee River in the fall and winter months, while being most likely to return in the spring and summer months. The approach used in this study to estimate survival is hypothesized to have led to higher survival estimates than traditional Capture-Mark-Recapture (CMR) derived estimates as a result of accounting for emigration from the Genesee River.

了解湖鲟幼鱼（Acipenser fulvescens）的生存状况对于了解种群丰度的变化以及评估放养等管理措施的有效性都很重要。通过放养孵化场饲养的个体，幼鱼的高死亡率得到部分缓解；然而，与较老的生命阶段相比，放养后的湖鲟的存活率仍然较低。在这项研究中，利用2019年和2020年秋季标记的69只0岁以上（体重：x¯= 29 g，范围= 2-41 g；长度：x¯= 198 mm，范围= 176-223 mm）和30只亚成年（体重：x¯= 2144 g，范围= 1100-7020 g；长度：x¯= 751 mm，范围= 605-1020 mm）的声遥测数据构建了一个多状态模型，用于估计Genesee河和安大略湖之间的生存和空间过渡。亚成虫（大约年龄：4-7岁）在杰纳西河和安大略湖的存活率估计超过88%。0岁以上的湖鲟的存活率要低得多，在31%（安大略湖）和77%（杰内西河）之间。0岁以上和亚成年湖鲟最可能在秋季和冬季离开杰内塞河，而最可能在春季和夏季返回。本研究中使用的估计生存的方法被假设为比传统的捕获-标记-再捕获（CMR）方法得出的估计更高的生存估计，因为考虑了来自Genesee河的移民。

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引用次数: 0