Limnology and Oceanography最新文献

{"title":"Carbon sedimentation in shallow floodplain lakes","authors":"Belén Franco‐Cisterna, Laurence Carvalho, Iain Cross, Sarian Kosten, Teresa Needham, Chris Pointer, Sonia Yáñez, Suzanne McGowan","doi":"10.1002/lno.70199","DOIUrl":"https://doi.org/10.1002/lno.70199","url":null,"abstract":"Shallow lakes are increasingly recognized as important sites for organic carbon (OC) storage. However, the drivers of OC deposition in shallow floodplain lakes remain unclear due to complex terrestrial and aquatic interactions. Using 8 yr of monthly sediment trap data in a cross‐ecosystem experiment on six UK shallow lakes of varying riverine connectivity, we investigated the role of allochthonous (fluvial materials) vs. autochthonous (phytoplankton production) deposits as the OC supply to lake sediments. Organic carbon sedimentation rates in river‐connected (1.3 ± 1.2 g C m<jats:sup>−2</jats:sup> d<jats:sup>−1</jats:sup>, mean ± SD) and isolated lakes (0.5 ± 0.4 g C m<jats:sup>−2</jats:sup> d<jats:sup>−1</jats:sup>) surpassed those previously published for temperate zone eutrophic lakes. Generalized linear mixed‐effect models identified water column chlorophyll <jats:italic>a</jats:italic> as the best predictor of OC sedimentation for most lakes, suggesting that autochthonous phytoplankton production was the dominant driver of OC sedimentation, albeit stimulated by riverine nutrient supply. Carbon (C) transfer to the sediments was modulated by flow; during major floods, phytoplankton was likely flushed out of lakes, reducing OC sedimentation. Inorganic carbon sedimentation intermittently contributes substantially to carbon deposition in spring, summer, and winter. This study evidenced that shallow floodplain lakes are important sites for C deposition, with maximum C transfer to the sediments during the growing season. Future increases in hydrological variability could negatively impact the capacity of shallow floodplain lakes to retain and sequester carbon.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"27 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144919571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long‐term changes to plankton communities in artificially heated lakes","authors":"Kingsly C. Beng, Slawek Cerbin, Michael T. Monaghan, Justyna Wolinska","doi":"10.1002/lno.70192","DOIUrl":"https://doi.org/10.1002/lno.70192","url":null,"abstract":"Increased surface‐water temperatures and nutrient enrichment are predicted to alter planktonic communities, impacting biodiversity and ecosystem functioning. While short‐term mesocosm studies have reported temperature‐ and nutrient‐driven effects, long‐term observations from natural systems remain limited. We studied seasonal plankton communities in 10 lakes in central Poland, five warmed by power plant discharge for six decades and ~ 2°C warmer (annual mean) than control lakes. Based on environmental DNA (eDNA) relative read abundance, green algae (Chlorophyta) were up to 15% more abundant in heated lakes, while golden algae (Chrysophyceae) were up to 7% more abundant in control lakes. Heated lakes exhibited higher diversity of diatoms, green algae, golden algae, cercozoans, basidiomycetes, and chytrids, especially in summer. Their plankton assemblages were compositionally distinct and showed reduced seasonal variability. Multiple regression revealed that rising temperature, interacting with elevated nutrients, reduced diversity in many plankton groups. Warming favored heat‐adapted taxa, driving compositional shifts. By providing insights into the long‐term impacts of anthropogenic warming, this study underscores the importance of integrating temperature‐nutrient interactions in predicting ecosystem responses to climate change.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"14 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144919573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Climate change scenarios differentially modulate the impact of invasion in a native macrophyte species","authors":"Tauany Rodrigues, Joseph L. S. Ferro, Reinaldo L. Bozelli, Aliny P. F. Pires, Vinicius F. Farjalla","doi":"10.1002/lno.70179","DOIUrl":"https://doi.org/10.1002/lno.70179","url":null,"abstract":"Biological invasion and climate change threaten freshwater ecosystems, potentially amplifying their impacts through interaction. However, empirical evidence on how future climate scenarios influence the invasion process and their interactive effects on native species remains limited. We conducted a full‐factorial experiment to evaluate the independent and interactive effects of <jats:italic>Hydrilla verticillata</jats:italic> invasion and future climate scenarios (baseline, mitigation, and business‐as‐usual) on the native macrophyte <jats:italic>Cabomba caroliniana</jats:italic>. We also assessed the response of the non‐native <jats:italic>H. verticillata</jats:italic> to these climate scenarios. The climate change mitigation scenario maintained the invasive potential of <jats:italic>H. verticillata</jats:italic>, as indicated by its vertical growth and colonization potential via vegetative propagules, which were comparable to baseline conditions. Simultaneously, the mitigation scenario supported the vertical growth and production of <jats:italic>C. caroliniana</jats:italic> at levels similar to those under the baseline. Under the business‐as‐usual scenario, <jats:italic>H. verticillata</jats:italic> exhibited enhanced vertical growth and colonization capacity via vegetative propagules. Interestingly, its presence under the business‐as‐usual scenario was associated with increased vertical production of the native species. Although invasion appeared to buffer the adverse effects of extreme climatic stress, it merely enabled <jats:italic>C. caroliniana</jats:italic> to recover vertical production to baseline and mitigation levels, rather than providing a long‐term advantage. Our findings highlight the ecological benefits of climate change mitigation and the complex outcomes arising from the interaction between invasion and future climate scenarios for native species.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"42 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144919575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic benthic oxygen fluxes lessen hypoxia effects on open continental shelves","authors":"Clare E. Reimers, Sarah K. Henkel, Kristen E. Fogaren, Peter J. Chace, Anna Hughes, W. Waldo Wakefield","doi":"10.1002/lno.70197","DOIUrl":"https://doi.org/10.1002/lno.70197","url":null,"abstract":"Under the supposition that organisms inhabiting physically dynamic marine environments are better able to survive hypoxic conditions than those experiencing little turbulent or advective augmentation of oxygen fluxes, we evaluated summertime benthic macrofauna communities, in situ aquatic eddy covariance measurements, and ex situ sediment core incubations from 5 latitudinally distinct mid‐shelf locations off Oregon–Washington, USA. Despite bottom water dissolved oxygen (DO) concentrations averaging from 17 to 75 <jats:italic>μ</jats:italic>mol L<jats:sup>−1</jats:sup>, invertebrate faunal collections contained mixtures of 11 to 28 taxa per 0.1 m<jats:sup>2</jats:sup> box core and increased in richness and abundance at sites with greater velocity variation. Eddy covariance velocity records of 18‐30 hours regularly showed the arrivals of internal waves. Oxygen fluxes, derived in 15‐min intervals, correlated with multiple flow parameters assessed from velocity components. Daily averages of the oxygen fluxes to the sediment were determined to range from −3.5 to −23 mmol m<jats:sup>−2</jats:sup> d<jats:sup>−1</jats:sup>, and these fluxes, assumed to fully represent seabed respiration, were 2 to 5 times greater than rates of DO uptake by sediment cores from the same locations. Velocity profiles measured from 0.3 to 2.5 m above the seafloor at a subset of sites were consistent with a wave‐current boundary layer modulated by ocean swell. These findings illustrate how natural physical processes can relieve the stress of hypoxia exposure on the benthos. Physical dynamics play critical roles in supplying DO and determining sediment grain size, permeability, and the activities of benthic organisms. Thus, these factors need consideration when predicting the impacts of low DO concentrations in coastal regions.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"306 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144919574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of oligotrophication on fish growth: Insights from a mesocosm experiment","authors":"Juliana Deo Dias, Nadson Ressye Simões, Claudia Costa Bonecker, Angelo Antonio Agostinho","doi":"10.1002/lno.70198","DOIUrl":"https://doi.org/10.1002/lno.70198","url":null,"abstract":"Human activities can frequently affect aquatic ecosystems in irreversible ways, with flow regulation and water quality being major concerns. Dams can promote the retention of sediments and nutrients, increase water transparency, and reduce primary productivity, all of which characterize the oligotrophication process. Although the beneficial effects of oligotrophication in eutrophic systems are well documented, the oligotrophication process caused by river impoundment can negatively affect aquatic communities in non‐eutrophic systems. Our study aimed to assess the effects of oligotrophication on the specific growth rate of small‐bodied fish. We hypothesized that the fish‐specific growth rate would decrease under an oligotrophic scenario, due to bottom‐up processes. We performed a full‐factorial experiment with nine treatments, using three levels of inorganic turbidity crossed by three levels of nutrients, in mesocosms during 24 d. In each tank, we added plankton and 30 individuals of <jats:italic>Moenkhausia forestii</jats:italic>, a fish species with omnivorous feeding habits. The fish were weighed at the beginning and at the end of the experiment to calculate specific growth rates. We observed a significant interaction between inorganic turbidity and nutrients on the specific growth. The smallest reduction in growth rate occurred in treatments with intermediate turbidity and high nutrient levels (T2N3), and high turbidity and high nutrient levels (T3N3). Our results indicate that changes in inorganic turbidity and nutrients, coinciding with oligotrophication caused by river dams, would negatively affect fish growth, which could have severe implications for fishery production and irreversible impacts on aquatic ecosystems.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"160 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144906152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A global meta‐analysis of ecological functions and regulating ecosystem services of freshwater bivalves","authors":"Alexandra Zieritz, Joshua I. Brian, Ronaldo Sousa, David C. Aldridge, Carla L. Atkinson, Karel Douda, Caryn Vaughn, Yulia Bespalaya, Tabitha Richmond, Adam M. Ćmiel, Alma Crisp, Andreas H. Dobler, Fabio Ercoli, Eduardo Esteves, Noé Ferreira‐Rodríquez, Juergen Geist, Irene Sánchez González, Dariusz Halabowski, Philipp Hoos, Garrett W. Hopper, Heini Hyvärinen, Martina Ilarri, Iga Lewin, Anna M. Lipińska, Jon H. Mageroy, Daniele Nizzoli, Isobel Ollard, Martin Österling, Nicoletta Riccardi, Sebastian L. Rock, Tuomo Sjönberg, Jouni Taskinen, Gorazd Urbanič, Maria Urbańska, Qingqing Yu, Ana Sofia Vaz","doi":"10.1002/lno.70190","DOIUrl":"https://doi.org/10.1002/lno.70190","url":null,"abstract":"Freshwater bivalves are globally distributed, diverse, and common in benthic communities. Many taxa, particularly in the most species‐rich order, Unionida, are declining due to anthropogenic stressors, while a small number of non‐native species have become increasingly abundant and widespread, commonly replacing native bivalve assemblages. To understand how these global changes may impact ecosystems and people, we conducted a meta‐analysis of existing literature quantifying the ecological functions (= supporting or intermediate ecosystem services) and regulating ecosystem services of freshwater bivalves (hereafter “ecosystem services”). Random effects meta‐analysis modeling across 447 case studies revealed a positive effect on human health, safety, or comfort of freshwater bivalve ecosystem services overall and specifically, via effects on native macrofauna, microorganisms, wastes, and pollutants, and the physico‐chemical condition or quantity of sediments. Generally, effects of native species and species within the orders Unionida and Venerida were more significant and positive than those of other freshwater bivalves. No significant overall effect was found for ecosystem services related to zooplankton, algae, invasive species, and the physico‐chemical condition of ambient water. Moreover, a significant bias toward publication of positive results existed for studies quantifying ecosystem services related to algae. These findings illustrate the global importance of the ecosystem services of freshwater bivalves and highlight the need for large‐scale conservation and restoration efforts for their species and populations globally, including those of common species. Our findings also question common assumptions of strong and ubiquitous effects of freshwater bivalves on algae and water condition, cautioning against extrapolating observations across systems.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"15 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144900782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Issue Information & TOC","authors":"","doi":"10.1002/lno.70178","DOIUrl":"10.1002/lno.70178","url":null,"abstract":"","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 8","pages":"2005-2006"},"PeriodicalIF":3.7,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://aslopubs.onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70178","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Issue Information & Members form","authors":"","doi":"10.1002/lno.70177","DOIUrl":"10.1002/lno.70177","url":null,"abstract":"","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 8","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://aslopubs.onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Issue Information & Masthead","authors":"","doi":"10.1002/lno.70176","DOIUrl":"10.1002/lno.70176","url":null,"abstract":"","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 8","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://aslopubs.onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70176","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Incorporation of diazotrophically fixed nitrogen by juvenile fish in a coastal sea","authors":"John M. Taylor, Sture Hansson, Helena Höglander, Agnes M. L. Karlson","doi":"10.1002/lno.70189","DOIUrl":"https://doi.org/10.1002/lno.70189","url":null,"abstract":"Nitrogen‐fixing cyanobacterial blooms worldwide have been shown to support production in primary consumers such as zooplankton and benthic invertebrates, but there have been few estimates of how much of the cyanobacterial nitrogen ends up in secondary consumers, such as fish. Using compound‐specific analysis of δ<jats:sup>15</jats:sup>N in amino acids, we have investigated whether cyanobacterially fixed (diazotrophic) nitrogen (N) can be traced in higher trophic level organisms such as zooplankton and mysids, and detected in juvenile Atlantic herring (<jats:italic>Clupea harengus</jats:italic>). At the eutrophied station, the biovolume of N‐fixing cyanobacteria was higher than at the reference station, and the autotrophic population was comprised of a higher proportion of cyanobacteria palatable to zooplankton. The δ<jats:sup>15</jats:sup>N ‰ of source amino acids in juvenile herring significantly decreased over the season at the eutrophied station. Bayesian mixing models were used to calculate the percent of diazotrophically fixed N found in herring muscle tissue in relation to prebloom N, and results showed that herring at the eutrophied station had a higher percent (≈ 34 %) of diazotrophically fixed N in their muscle tissue than fish at the reference station (≈ 18 %). A significant relationship was found between the percentage of diazotrophically fixed N in herring muscle tissue and the biovolume of N‐fixing cyanobacteria in the environment two months prior to the capture date of the fish. This study adds to the mounting evidence that cyanobacteria blooms, a global occurrence, support production at higher trophic levels, including fish.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"5 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144900797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}