Limnology and Oceanography Letters最新文献

{"title":"American manatees adjust their diet composition and trophic niche breadth across different coastal regions","authors":"Camila Carvalho de Carvalho,&nbsp;Emma Deeks,&nbsp;Leandro L. Ciotti,&nbsp;Silvina Botta,&nbsp;Miriam Marmontel,&nbsp;Margareth Copertino,&nbsp;Fábia de Oliveira Luna,&nbsp;Fernanda Niemeyer Löffer Attademo,&nbsp;Vitor Luz Carvalho,&nbsp;João Carlos Gomes Borges,&nbsp;Alexandra Fernandes Costa,&nbsp;Renata Emin-Lima,&nbsp;Pavel Kratina,&nbsp;Eduardo Resende Secchi","doi":"10.1002/lol2.70127","DOIUrl":"https://doi.org/10.1002/lol2.70127","url":null,"abstract":"<p>Marine mammals can exhibit high plasticity in foraging strategies, but how such plasticity is driven by environmental conditions is poorly understood. The American manatee (<i>Trichechus manatus</i>), a large, endangered herbivore, inhabits marine, estuarine, and freshwater environments. To better understand their resource use, we analyzed dietary differences across three large Brazilian regions—the Northern Coast (NC), Dry-Northeastern Coast (Dry-NEC), and Humid-Northeastern Coast (Humid-NEC). The δ¹³C and δ¹⁵N values of manatee tissues increased from the NC to the Northeastern Coast. Stable isotope mixing models revealed that manatees from the Dry-NEC feed almost exclusively on seagrasses, while those from the NC rely predominantly on saltmarsh vegetation. In the Humid-NEC, manatees had a notable contribution from macroalgae, and exhibited the greatest dietary and habitat use diversity among the regions. These spatial patterns advance our understanding of large-scale habitat use, guiding the establishment of marine protected areas to safeguard manatees and their habitats.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"11 3","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148047573","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}

{"title":"Eutrophication and ice phenology influence methane storage in north temperate lakes","authors":"Grace M. Wilkinson,&nbsp;Moira McCarthy,&nbsp;Brittni Bertolet,&nbsp;Stephen R. Carpenter,&nbsp;Dat Ha,&nbsp;Noah Lottig,&nbsp;Daniel K. Szydlowski,&nbsp;Michael L. Pace,&nbsp;Stuart Jones","doi":"10.1002/lol2.70136","DOIUrl":"https://doi.org/10.1002/lol2.70136","url":null,"abstract":"<p>Among lakes, eutrophication is positively related to methane emissions, but various processes can alter the seasonal conversion of primary production into stored methane. We used a series of whole-lake enrichment and shading experiments across three years with varying ice phenology to assess how eutrophication and ice cover affect within-year methane storage. The seasonal pattern of methane storage was driven in part by cyanobacteria blooms and their influence on light and oxygen availability. Early ice-off reduced anoxic volume and methane storage in both the manipulated and reference lake, but a subsequent bloom and shading in the manipulated lake drove a rapid increase in methane, with storage reaching similar levels to those of other years. These experiments revealed that interactions between ice phenology and eutrophication can drive shifts in seasonal methane storage trajectories in north temperate lakes. Improved understanding of variability in these drivers could substantially reduce uncertainty in lake methane emissions.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"11 3","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70136","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148047432","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}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"11 3","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148069393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eutrophication and ice phenology influence methane storage in north temperate lakes","authors":"Grace M. Wilkinson,&nbsp;Moira McCarthy,&nbsp;Brittni Bertolet,&nbsp;Stephen R. Carpenter,&nbsp;Dat Ha,&nbsp;Noah Lottig,&nbsp;Daniel K. Szydlowski,&nbsp;Michael L. Pace,&nbsp;Stuart Jones","doi":"10.1002/lol2.70136","DOIUrl":"https://doi.org/10.1002/lol2.70136","url":null,"abstract":"<p>Among lakes, eutrophication is positively related to methane emissions, but various processes can alter the seasonal conversion of primary production into stored methane. We used a series of whole-lake enrichment and shading experiments across three years with varying ice phenology to assess how eutrophication and ice cover affect within-year methane storage. The seasonal pattern of methane storage was driven in part by cyanobacteria blooms and their influence on light and oxygen availability. Early ice-off reduced anoxic volume and methane storage in both the manipulated and reference lake, but a subsequent bloom and shading in the manipulated lake drove a rapid increase in methane, with storage reaching similar levels to those of other years. These experiments revealed that interactions between ice phenology and eutrophication can drive shifts in seasonal methane storage trajectories in north temperate lakes. Improved understanding of variability in these drivers could substantially reduce uncertainty in lake methane emissions.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"11 3","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70136","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148047435","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}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"11 3","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148047434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"11 3","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148046851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"11 3","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148066888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Algal blooms as biofilm analogues: Evolutionary insights into cyanobacterial adaptation","authors":"Hidetoshi Urakawa,&nbsp;Hans W. Paerl","doi":"10.1002/lol2.70132","DOIUrl":"https://doi.org/10.1002/lol2.70132","url":null,"abstract":"&lt;p&gt;Cyanobacteria are the oldest oxygenic phototrophs on Earth, with fossil records extending back to Archean Eon (Golubic and Seong-Joo &lt;span&gt;1999&lt;/span&gt;; Schirrmeister et al. &lt;span&gt;2015&lt;/span&gt;). Many lineages form mats that thrive in benthic and epilithic habitats, where attachment and stability confer clear ecological advantages (Chen et al. &lt;span&gt;2021&lt;/span&gt;; Paerl et al. &lt;span&gt;2000&lt;/span&gt;). Over evolutionary time, some cyanobacterial groups transitioned to a planktonic lifestyle, dispersing throughout the photic water column, providing habitat expansion (Chen et al. &lt;span&gt;2021&lt;/span&gt;). Primary production of current marine and freshwater pelagic habitats is dominated by free-living picocyanobacteria, which are highly adapted to this vast and often oligotrophic environment (Flombaum et al. &lt;span&gt;2013&lt;/span&gt;). Among the free-living cyanobacteria, certain species evolved with the remarkable ability to aggregate and form dense surface blooms. Based on a comparative genome analysis, these lineages were likely established around 1 ± 0.5 billion years ago (Schirrmeister et al. &lt;span&gt;2015&lt;/span&gt;).&lt;/p&gt;&lt;p&gt;Because the formation of massive surface blooms is recognized as a threat to ecosystem and biotic health and hence a management challenge, the mechanisms underlying bloom development, proliferation, and collapse have been extensively investigated, largely in freshwater ecosystems (Huisman et al. &lt;span&gt;2018&lt;/span&gt;). The transition to a surface-associated lifestyle among bloom-forming cyanobacteria involves substantial physiological and metabolic reprogramming (Huang et al. &lt;span&gt;2025&lt;/span&gt;). In &lt;i&gt;Microcystis&lt;/i&gt;, a widely-distributed and studied bloom-forming cyanobacterium, colony buoyancy and aggregation are regulated predominantly through the coordinated functions of gas vesicles and extracellular polymeric substances (EPS) (Wei et al. &lt;span&gt;2019&lt;/span&gt;). During early stages of bloom formation, cells proliferate rapidly within the water column, and surface accumulation generally occurs only after the population exceeds a critical density, suggesting the involvement of quorum sensing or other cell-to-cell communication mechanisms (Li et al. &lt;span&gt;2013&lt;/span&gt;; Ramsay and Salmond &lt;span&gt;2012&lt;/span&gt;).&lt;/p&gt;&lt;p&gt;These observations suggest that intercellular communication and EPS production are central processes in &lt;i&gt;Microcystis&lt;/i&gt; bloom formation, paralleling key features of bacterial biofilm development (Shen et al. &lt;span&gt;2011&lt;/span&gt;). Accordingly, we propose that cyanobacterial surface blooms function as ecological analogues of biofilms: an adaptive strategy that enhances community resilience, facilitates gene and metabolite exchange, and accelerates genetic diversification in response to environmental challenges (Fig. 1).&lt;/p&gt;&lt;p&gt;Biofilms enhance cellular protection and survival by embedding cells within EPS that acts as a physical and chemical barrier against environmental stressors such as antibiotics, toxins, UV radiation, and predation (Flemming and W","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"11 3","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70132","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148046850","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}

{"title":"Algal blooms as biofilm analogues: Evolutionary insights into cyanobacterial adaptation","authors":"Hidetoshi Urakawa,&nbsp;Hans W. Paerl","doi":"10.1002/lol2.70132","DOIUrl":"https://doi.org/10.1002/lol2.70132","url":null,"abstract":"&lt;p&gt;Cyanobacteria are the oldest oxygenic phototrophs on Earth, with fossil records extending back to Archean Eon (Golubic and Seong-Joo &lt;span&gt;1999&lt;/span&gt;; Schirrmeister et al. &lt;span&gt;2015&lt;/span&gt;). Many lineages form mats that thrive in benthic and epilithic habitats, where attachment and stability confer clear ecological advantages (Chen et al. &lt;span&gt;2021&lt;/span&gt;; Paerl et al. &lt;span&gt;2000&lt;/span&gt;). Over evolutionary time, some cyanobacterial groups transitioned to a planktonic lifestyle, dispersing throughout the photic water column, providing habitat expansion (Chen et al. &lt;span&gt;2021&lt;/span&gt;). Primary production of current marine and freshwater pelagic habitats is dominated by free-living picocyanobacteria, which are highly adapted to this vast and often oligotrophic environment (Flombaum et al. &lt;span&gt;2013&lt;/span&gt;). Among the free-living cyanobacteria, certain species evolved with the remarkable ability to aggregate and form dense surface blooms. Based on a comparative genome analysis, these lineages were likely established around 1 ± 0.5 billion years ago (Schirrmeister et al. &lt;span&gt;2015&lt;/span&gt;).&lt;/p&gt;&lt;p&gt;Because the formation of massive surface blooms is recognized as a threat to ecosystem and biotic health and hence a management challenge, the mechanisms underlying bloom development, proliferation, and collapse have been extensively investigated, largely in freshwater ecosystems (Huisman et al. &lt;span&gt;2018&lt;/span&gt;). The transition to a surface-associated lifestyle among bloom-forming cyanobacteria involves substantial physiological and metabolic reprogramming (Huang et al. &lt;span&gt;2025&lt;/span&gt;). In &lt;i&gt;Microcystis&lt;/i&gt;, a widely-distributed and studied bloom-forming cyanobacterium, colony buoyancy and aggregation are regulated predominantly through the coordinated functions of gas vesicles and extracellular polymeric substances (EPS) (Wei et al. &lt;span&gt;2019&lt;/span&gt;). During early stages of bloom formation, cells proliferate rapidly within the water column, and surface accumulation generally occurs only after the population exceeds a critical density, suggesting the involvement of quorum sensing or other cell-to-cell communication mechanisms (Li et al. &lt;span&gt;2013&lt;/span&gt;; Ramsay and Salmond &lt;span&gt;2012&lt;/span&gt;).&lt;/p&gt;&lt;p&gt;These observations suggest that intercellular communication and EPS production are central processes in &lt;i&gt;Microcystis&lt;/i&gt; bloom formation, paralleling key features of bacterial biofilm development (Shen et al. &lt;span&gt;2011&lt;/span&gt;). Accordingly, we propose that cyanobacterial surface blooms function as ecological analogues of biofilms: an adaptive strategy that enhances community resilience, facilitates gene and metabolite exchange, and accelerates genetic diversification in response to environmental challenges (Fig. 1).&lt;/p&gt;&lt;p&gt;Biofilms enhance cellular protection and survival by embedding cells within EPS that acts as a physical and chemical barrier against environmental stressors such as antibiotics, toxins, UV radiation, and predation (Flemming and W","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"11 3","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70132","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148046878","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}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"11 3","pages":""},"PeriodicalIF":5.0,"publicationDate":"2026-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148067256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}