Limnology and Oceanography Letters最新文献_第5页

Aquatic heatwaves increase surface chlorophyll concentrations in experimental and reference lakes 水生热浪增加了实验湖和参考湖的表面叶绿素浓度

IF 5 2区地球科学

Limnology and Oceanography Letters Pub Date : 2025-05-01 DOI: 10.1002/lol2.70024

Daniel K. Szydlowski, Katie A. Bollini, Michael L. Pace, Grace M. Wilkinson

引用次数: 0

Combining genetic and isotope frameworks improves reconstruction of fish provenance across riverscapes 结合遗传和同位素框架可以改善河流景观中鱼类来源的重建

IF 5 2区地球科学

Limnology and Oceanography Letters Pub Date : 2025-04-30 DOI: 10.1002/lol2.70025

Ben Makhlouf, Timothy J. Cline, Diego Fernandez, Lisa Seeb, Elizabeth Lee, Sara Gilk-Baumer, Diane Whited, Christian E. Zimmerman, Daniel E. Schindler

{"title":"Combining genetic and isotope frameworks improves reconstruction of fish provenance across riverscapes","authors":"Ben Makhlouf, Timothy J. Cline, Diego Fernandez, Lisa Seeb, Elizabeth Lee, Sara Gilk-Baumer, Diane Whited, Christian E. Zimmerman, Daniel E. Schindler","doi":"10.1002/lol2.70025","DOIUrl":"10.1002/lol2.70025","url":null,"abstract":"Understanding the spatial ecology of migratory species is uniquely challenging using conventional approaches. In fisheries such as for Pacific salmon, genetic stock identification (GSI) and isotope-based methods have emerged as strategies for reconstructing spatial ecology but are limited by the spatial resolution of genetic differentiation and isotopic heterogeneity. We show that integrating these complementary datasets improve the spatial resolution of provenance assignments. To do so, we reconstructed basin-wide estimates of natal origin locations for Chinook salmon in the Yukon River using samples (n = 247) from an experimental fishery designed to assess in-season run timing. A combined framework improved precision of likely provenance assignments (stream km > 0.7 posterior probability) by 92% over genetic assignments and 52% over strontium isotope methods. In doing so, we illustrate watershed scale estimates of natal origin distributions with a greater resolution available from GSI or isotope data alone.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 5","pages":"692-701"},"PeriodicalIF":5.0,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://aslopubs.onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70025","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143893639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel mechanism explaining the temperature dependence of marine unicellular nitrogen-fixing cyanobacteria 一个解释海洋单细胞固氮蓝藻温度依赖性的新机制

IF 5 2区地球科学

Limnology and Oceanography Letters Pub Date : 2025-04-28 DOI: 10.1002/lol2.10458

Lixia Deng, Jiawei Chen, Jonathan P. Zehr, Jiaxing Liu, Xiaodong Zhang, Shunyan Cheung, Hongbin Liu

{"title":"A novel mechanism explaining the temperature dependence of marine unicellular nitrogen-fixing cyanobacteria","authors":"Lixia Deng, Jiawei Chen, Jonathan P. Zehr, Jiaxing Liu, Xiaodong Zhang, Shunyan Cheung, Hongbin Liu","doi":"10.1002/lol2.10458","DOIUrl":"10.1002/lol2.10458","url":null,"abstract":"The major marine nitrogen-fixing cyanobacterium, Crocosphaera watsonii, is restricted to warm tropical and subtropical oceans, while the underlying mechanisms remain unclear. C. watsonii fixes nitrogen (oxygen-sensitive) and carbon (oxygen-evolving) during night and day, respectively. By diel analyses of physiological rates and transcriptome at its optimal (28°C) and a lower temperature (23°C), we found that the low temperature delayed the enhancement of respiration (oxygen-consuming) and the onset of nitrogen fixation during nighttime. Transcription of the master regulator of circadian gene expression, circadian genes, and major metabolic pathways (e.g., respiration, nitrogen fixation, and photosynthesis) was delayed at the low temperature, suggesting that low temperature might decouple intracellular and environmental diurnal cycles and cause resource limitation and reduced growth. We propose that temperature might mediate the circadian clock, thereby regulating diurnal rhythm of nitrogen and carbon fixation, explaining the temperature dependence (particularly the lower thermal limit) and biogeography of C. watsonii.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 3","pages":"287-297"},"PeriodicalIF":5.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10458","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143890081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatiotemporal assessment of benthic macroinvertebrate communities in the Bermejo River Basin in the Ecuadorian Amazonia 厄瓜多尔亚马逊河Bermejo河流域底栖大型无脊椎动物群落的时空评价

IF 5 2区地球科学

Limnology and Oceanography Letters Pub Date : 2025-04-26 DOI: 10.1002/lol2.70012

Federico Sinche Chele, Manuel Cabrera Quezada, Roly Ramirez, Augusto Vargas, Jessica Cayambe, Jennifer Alvarez, Pablo Carrera, Hayda Andrade, Edison Segura

{"title":"Spatiotemporal assessment of benthic macroinvertebrate communities in the Bermejo River Basin in the Ecuadorian Amazonia","authors":"Federico Sinche Chele, Manuel Cabrera Quezada, Roly Ramirez, Augusto Vargas, Jessica Cayambe, Jennifer Alvarez, Pablo Carrera, Hayda Andrade, Edison Segura","doi":"10.1002/lol2.70012","DOIUrl":"10.1002/lol2.70012","url":null,"abstract":"The Cofán communities rely on the Cofán Bermejo Ecological Reserve for their survival and cultural practices. Due to the rugged and inaccessible topography of the reserve in the Northern Ecuadorian Amazon region, limited biomonitoring and ecological characterization studies of the ecosystem health have been conducted. We investigated the community composition and functional structure of benthic macroinvertebrates in the Bermejo River basin by identifying bioindicators and measuring physicochemical variables. Our results indicated that predators were consistently the dominant taxa in all sampled sites, and that the taxonomic abundance was positively correlated with richness and the collector taxa. We also observed positive relations between pH and taxonomic abundance, and between water temperature and the biological monitoring working party metric. Primary associations were also found between feeding guilds, pollution-sensitive taxa, and ecological water indices. This work provided a first characterization of the macroinvertebrate communities and physicochemical parameters in the Bermejo River basin.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 3","pages":"371-380"},"PeriodicalIF":5.0,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deltaic engineering-induced accumulation hides erosion in response to fluvial sediment decline in the Yangtze submarine shoal 三角洲工程引起的堆积掩盖了长江海底浅滩对河流沉积物减少的响应

IF 5 2区地球科学

Limnology and Oceanography Letters Pub Date : 2025-04-18 DOI: 10.1002/lol2.70018

Haifei Yang, Lu Wang, Kehui Xu, Wenxiang Zhang, Benwei Shi, Shilun Yang, Ya Ping Wang

{"title":"Deltaic engineering-induced accumulation hides erosion in response to fluvial sediment decline in the Yangtze submarine shoal","authors":"Haifei Yang, Lu Wang, Kehui Xu, Wenxiang Zhang, Benwei Shi, Shilun Yang, Ya Ping Wang","doi":"10.1002/lol2.70018","DOIUrl":"10.1002/lol2.70018","url":null,"abstract":"Worldwide river deltas are impacted by human activities and climatic change, but it has been challenging to quantify their contributions due to nonlinear natural processes and a lack of long-term geomorphological data. Time-series bathymetric data were collected at submarine Hengsha Shoal in the Yangtze Delta during 11 repeat surveys over 60 yr. Our results show that the minimum riverine sediment supply to maintain the shoal's morphology was 229–258 Mt yr−1. Without human impacts, it would have been experiencing net erosion since the operation of the Three Gorges Dam in 2003. However, this shoal has been growing in certain periods. Specifically, the accumulation/erosion during the project's period was much stronger than those during the pre- and post-projects periods. Morphological change due to deltaic engineering was as high as 19 times of that induced by sediment decline. For future research, it is critical to quantify the impact of deltaic human activities during the Anthropocene Epoch.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 4","pages":"527-535"},"PeriodicalIF":5.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Concurrent global change and marine heatwaves disturb phototrophic more than heterotrophic protist diversity 同时发生的全球变化和海洋热浪对光养原生生物多样性的干扰大于异养原生生物多样性

IF 5 2区地球科学

Limnology and Oceanography Letters Pub Date : 2025-04-17 DOI: 10.1002/lol2.70017

Antonia Ahme, Inga Vanessa Kirstein, Cedric Leo Meunier, Sylke Wohlrab, Uwe John

{"title":"Concurrent global change and marine heatwaves disturb phototrophic more than heterotrophic protist diversity","authors":"Antonia Ahme, Inga Vanessa Kirstein, Cedric Leo Meunier, Sylke Wohlrab, Uwe John","doi":"10.1002/lol2.70017","DOIUrl":"10.1002/lol2.70017","url":null,"abstract":"Anthropogenic pressures like ocean warming, acidification, rising N : P ratios, and marine heatwaves (MHWs) are affecting eukaryotic plankton diversity, though their combined impacts are rarely studied. To address this, we conducted a mesocosm experiment on a North Sea plankton community, testing the influence of a MHW under ambient and future environmental conditions. Using 18S rRNA amplicon sequencing, we found that global change generally reduced protist diversity, in particular that of phototrophic organisms. While heterotrophs were largely unaffected by heatwaves, phototrophic diversity declined especially during cooling and only recovered under ambient conditions. Global change shifted the community from nano- to pico-sized phototrophs and increased harmful algae bloom species and parasites, while heatwaves elevated marine ochrophytes. The coccolithophore Gephyrocapsa oceanica thrived under both stressors. Our findings suggest that changing baseline conditions and extreme events can differentially impact heterotrophic and phototrophic diversity, with potential consequences for the metabolic balance of eukaryotic plankton communities.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 4","pages":"473-484"},"PeriodicalIF":5.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Brachiopods as archives of intrannual, annual, and interannual environmental variations 腕足类动物作为年际、年际和年际环境变化的档案

IF 5 2区地球科学

Limnology and Oceanography Letters Pub Date : 2025-04-15 DOI: 10.1002/lol2.70004

G. Crippa, H. Jurikova, M. J. Leng, M. Zanchi, E. M. Harper, J. W. B. Rae, K. Savickaite, M. Viaretti, L. Angiolini

{"title":"Brachiopods as archives of intrannual, annual, and interannual environmental variations","authors":"G. Crippa, H. Jurikova, M. J. Leng, M. Zanchi, E. M. Harper, J. W. B. Rae, K. Savickaite, M. Viaretti, L. Angiolini","doi":"10.1002/lol2.70004","DOIUrl":"10.1002/lol2.70004","url":null,"abstract":"Brachiopods have been employed for environmental and climatic reconstructions in the near and geological past. Traditionally, one datapoint is obtained per shell, providing time-averaged bulk signals. However, brachiopods also have the potential to provide time-resolved information on (sub)annual timescales, but this has been understudied due to difficulties in accounting for brachiopod shell growth. We investigated the distribution of δ18O, δ13C and Element/Ca along growth profiles of three Recent terebratulides from temperate and polar latitudes. We employed a novel approach using the Brody–Bertalanffy equation to transform shell distances into ages, permitting the study of periodicity in the measured signatures. We show that, superimposed on ontogenetic trends, faster-growing temperate species record annual and intrannual changes at collection sites, whereas slower-growing Antarctic species are also controlled by endogenous cycles. δ18O profiles reflect annual and intrannual variations in midlatitudes and interannual variations at high latitudes. δ13C and Element/Ca are additionally influenced by vital effects.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 3","pages":"390-402"},"PeriodicalIF":5.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143841796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impacts of riverine heatwaves on rates of ecosystem metabolism in the United States 河流热浪对美国生态系统代谢速率的影响

IF 5 2区地球科学

Limnology and Oceanography Letters Pub Date : 2025-04-11 DOI: 10.1002/lol2.70014

Spencer J. Tassone, Michelle C. Kelly, Olivia N. Beidler, Michael L. Pace, Amy M. Marcarelli

引用次数: 0

Flocculation regulates suspended sediment transport in estuarine fronts 絮凝作用调节河口前缘悬浮泥沙的运移

IF 5 2区地球科学

Limnology and Oceanography Letters Pub Date : 2025-04-11 DOI: 10.1002/lol2.70016

Leiping Ye, Jiayao Zhang, Jie Ren, Huan Liu, Jiaxue Wu

{"title":"Flocculation regulates suspended sediment transport in estuarine fronts","authors":"Leiping Ye, Jiayao Zhang, Jie Ren, Huan Liu, Jiaxue Wu","doi":"10.1002/lol2.70016","DOIUrl":"10.1002/lol2.70016","url":null,"abstract":"This study examines suspended sediment transport affected by flocculation settling in a highly stratified tidal estuary. In situ observation recorded two estuarine front passages during strong-ebb and flood-slack tides, respectively. The strong-ebb front enhanced turbulence, increasing sediment concentrations (~ 5 ppm), macrofloc size (~ 300 μm) and settling efficiency. The surface plume combined with middle layer together thickened from 1.5 to 2.5 m, facilitating particles mixing. The plankton and organic debris were transported into bottom water, forming fluffy, porous macroflocs. In contrast, the flood-slack front developed stable middle barrier layer (~ 2 m) that restricted mixing and organic input, leading to denser, compact flocs (~ 150 μm) in bottom waters. Floc size distributions shifted from microfloc-dominated to macrofloc-dominated during strong-ebb front passing, then returned to smaller, denser flocs. Dissolved-oxygen changes due to sediment oxygen depletion varying. These findings help to improve predictive models for sediment transport and hypoxia dynamics in estuarine systems.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 4","pages":"516-526"},"PeriodicalIF":5.0,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143822911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Variable phenology but consistent loss of ice cover on 1213 Minnesota lakes 明尼苏达州1213个湖泊的物候变化，但冰盖持续减少

IF 5 2区地球科学

Limnology and Oceanography Letters Pub Date : 2025-04-09 DOI: 10.1002/lol2.70015

Jake R. Walsh, Christopher I. Rounds, Kelsey Vitense, Holly K. Masui, Kenneth A. Blumenfeld, Peter J. Boulay, Shyam M. Thomas, Andrew E. Honsey, Naomi S. Blinick, Claire L. Rude, Jonah A. Bacon, Ashley A. LaRoque, Tarciso C. C. Leão, Gretchen J. A. Hansen

{"title":"Variable phenology but consistent loss of ice cover on 1213 Minnesota lakes","authors":"Jake R. Walsh, Christopher I. Rounds, Kelsey Vitense, Holly K. Masui, Kenneth A. Blumenfeld, Peter J. Boulay, Shyam M. Thomas, Andrew E. Honsey, Naomi S. Blinick, Claire L. Rude, Jonah A. Bacon, Ashley A. LaRoque, Tarciso C. C. Leão, Gretchen J. A. Hansen","doi":"10.1002/lol2.70015","DOIUrl":"10.1002/lol2.70015","url":null,"abstract":"Lake ice cover is declining globally with important implications for lake ecosystems. Ice loss studies often rely on small numbers of lakes with long-term data. We analyzed variation and trends in ice cover phenology from 1213 lakes over 74 yr (1949–2022) in Minnesota (USA), during which ice cover duration declined at a rate of 2 d per decade (14 d total) and became more variable. Despite variation in phenology, just 10–20% of lakes differed from statewide phenological trends. Accounting for synchronous annual variation and estimating trends over long time periods (e.g., > 40 yr) were critical for obtaining robust estimates of ice loss. The constant rates estimated here were consistent with recent global estimates (1.7–1.9 d per decade) and suggest that, even if present, accelerating rates of ice loss could be difficult to detect in the midst of shorter-term periods of warming and increasing variability.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 4","pages":"506-515"},"PeriodicalIF":5.0,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143813445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0