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Disentangling effects of droughts and heatwaves on alpine periphyton communities: A mesocosm experiment 区分干旱和热浪对高山浮游生物群落的影响：中型宇宙实验
IF 7.8 2区 地球科学
Limnology and Oceanography Letters Pub Date : 2024-10-26 DOI: 10.1002/lol2.10445
Tamika Nagao, Rolf Vinebrooke
{"title":"Disentangling effects of droughts and heatwaves on alpine periphyton communities: A mesocosm experiment","authors":"Tamika Nagao, Rolf Vinebrooke","doi":"10.1002/lol2.10445","DOIUrl":"https://doi.org/10.1002/lol2.10445","url":null,"abstract":"The accelerating rate of global climate change at higher elevations and latitudes is increasing the potential for extreme climatic events. Here, a knowledge gap exists in how the order of exposure to, and duration of droughts and heatwaves affect their cumulative impact on aquatic communities. We tested experimentally for the legacy effects of simultaneous vs. sequential exposures to drought and heatwave on sediment‐dwelling algal communities (epipelon) from small fishless alpine lakes. In both simultaneous, and sequential exposure treatments involving drought followed by a heatwave, the negative effect of drought masked the effects of warming on chlorophyll‐inferred algal biomass and taxonomic composition. Reversal of order of exposure (i.e., heatwave followed by drought) lowered their cumulative effect on community structure. These findings highlight the potential for drought events to dominate over heatwaves in altering shallow littoral ecosystems at high elevations under a rapidly warming climate.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142490525","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}
引用次数: 0
Snow removal cools a small dystrophic lake 除雪给萎缩小湖降温
IF 7.8 2区 地球科学
Limnology and Oceanography Letters Pub Date : 2024-10-24 DOI: 10.1002/lol2.10444
H. A. Dugan, R. Ladwig, P. Schramm, N. R. Lottig
{"title":"Snow removal cools a small dystrophic lake","authors":"H. A. Dugan, R. Ladwig, P. Schramm, N. R. Lottig","doi":"10.1002/lol2.10444","DOIUrl":"https://doi.org/10.1002/lol2.10444","url":null,"abstract":"Limnological understanding of the role snow plays in under‐ice thermal dynamics is mainly based on studies of clear‐water lakes. Very little is known about the role snow plays in the thermal dynamics of dystrophic lakes. We conducted a whole lake experiment on a small, 8 m deep dystrophic bog lake in northern Wisconsin, where we removed all snowfall over two consecutive winters. Due to weather variability, only 1 year had predominantly black ice. Under these conditions, the lake rapidly cooled in early and mid‐winter, compared to snow covered conditions that insulated the lake from heat loss. The lake also rapidly gained heat in late winter resulting in isothermal conditions well in advance of ice‐off. These results show how water clarity modulates the influence of snow on under‐ice thermal dynamics, which is relevant to futures with snow droughts.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142489963","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}
引用次数: 0
Unraveling Lake Geneva's hypoxia crisis in the Anthropocene 揭示人类世的日内瓦湖缺氧危机
IF 7.8 2区 地球科学
Limnology and Oceanography Letters Pub Date : 2024-10-08 DOI: 10.1002/lol2.10435
Laura M. V. Soares, Olivia Desgué‐Itier, Cécilia Barouillet, Céline Casenave, Isabelle Domaizon, Victor Frossard, Nelson G. Hairston, Andrea Lami, Bruno J. Lemaire, Georges‐Marie Saulnier, Frédéric Soulignac, Brigitte Vinçon‐Leite, Jean‐Philippe Jenny
{"title":"Unraveling Lake Geneva's hypoxia crisis in the Anthropocene","authors":"Laura M. V. Soares, Olivia Desgué‐Itier, Cécilia Barouillet, Céline Casenave, Isabelle Domaizon, Victor Frossard, Nelson G. Hairston, Andrea Lami, Bruno J. Lemaire, Georges‐Marie Saulnier, Frédéric Soulignac, Brigitte Vinçon‐Leite, Jean‐Philippe Jenny","doi":"10.1002/lol2.10435","DOIUrl":"https://doi.org/10.1002/lol2.10435","url":null,"abstract":"Despite global evidence of lake deoxygenation, its duration, timing, and impacts over decadal to centennial timescales remain uncertain. This study introduces a novel model approach using 150 yr of limnological and paleolimnological data to evaluate the anthropogenic impacts on deep oxygen in Lake Geneva. Results highlight an increase in oxygen consumption rates due to cultural eutrophication, initially triggering historical hypoxia, subsequently exacerbated by reduced winter mixing induced by climate change. Simulations of pre‐eutrophication conditions and future climate scenarios define safe operating spaces for the lake to thrive without severe hypoxia risk. Complete winter mixing and O<jats:sub>2</jats:sub> recharge once every 3 yr can compensate the oxygen demand in Lake Geneva, even when exceeding 1.5 g O<jats:sub>2</jats:sub> m<jats:sup>−2</jats:sup> d<jats:sup>−1</jats:sup>. However, when complete winter mixing becomes less frequent, even consumption rates similar to those observed before eutrophication can cause persistent hypoxia, posing a significant threat to the survival of hypolimnetic aquatic life.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142385644","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}
引用次数: 0
Simple visualization of fish migration history based on high‐resolution otolith δ18O profiles and hydrodynamic models 基于高分辨率耳石 δ18O 图谱和流体力学模型的鱼类洄游史简易可视化技术
IF 7.8 2区 地球科学
Limnology and Oceanography Letters Pub Date : 2024-10-05 DOI: 10.1002/lol2.10434
Tatsuya Sakamoto
{"title":"Simple visualization of fish migration history based on high‐resolution otolith δ18O profiles and hydrodynamic models","authors":"Tatsuya Sakamoto","doi":"10.1002/lol2.10434","DOIUrl":"https://doi.org/10.1002/lol2.10434","url":null,"abstract":"Oxygen‐stable isotope (<jats:italic>δ</jats:italic><jats:sup>18</jats:sup>O) in otoliths has been useful to infer marine fish migrations. However, because otolith <jats:italic>δ</jats:italic><jats:sup>18</jats:sup>O is affected by two parameters, temperature and <jats:italic>δ</jats:italic><jats:sup>18</jats:sup>O of ambient water, its interpretation becomes challenging when neither of them is constant. Here, I describe a simple method using hydrodynamic models to visualize potential migration histories from high‐resolution otolith <jats:italic>δ</jats:italic><jats:sup>18</jats:sup>O chronologies. By predicting the distribution of potential otolith <jats:italic>δ</jats:italic><jats:sup>18</jats:sup>O, that is, otolith <jats:italic>δ</jats:italic><jats:sup>18</jats:sup>O isoscape from modeled temperature and salinity distributions and comparing these with observed values, possible fish locations can be inferred. The demonstration of sardine juveniles in the western North Pacific region reproduced their seasonal northward migrations accurately. The predicted locations were consistent with the results of sampling surveys of eggs and juveniles and correctly approached the point where fish were caught. The methodological recommendations and the successful demonstration in this study may help in planning future sclerochronology research using carbonate <jats:italic>δ</jats:italic><jats:sup>18</jats:sup>O values.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142379272","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}
引用次数: 0
Arctic fishes reveal patterns in radiocarbon age across habitats and with recent climate change 北极鱼类揭示了不同栖息地的放射性碳年龄模式以及最近的气候变化
IF 7.8 2区 地球科学
Limnology and Oceanography Letters Pub Date : 2024-10-04 DOI: 10.1002/lol2.10442
Ashley E. Stanek, Jonathan A. O'Donnell, Michael P. Carey, Sarah M. Laske, Xiaomei Xu, Kenneth H. Dunton, Vanessa R. von Biela
{"title":"Arctic fishes reveal patterns in radiocarbon age across habitats and with recent climate change","authors":"Ashley E. Stanek, Jonathan A. O'Donnell, Michael P. Carey, Sarah M. Laske, Xiaomei Xu, Kenneth H. Dunton, Vanessa R. von Biela","doi":"10.1002/lol2.10442","DOIUrl":"https://doi.org/10.1002/lol2.10442","url":null,"abstract":"Climate change alters the sources and age of carbon in Arctic food webs by fostering the release of older carbon from degrading permafrost. Radiocarbon (<jats:sup>14</jats:sup>C) traces carbon sources and age, but data before rapid warming are rare and limit assessments over time. We capitalized on <jats:sup>14</jats:sup>C data collected ~ 40 years ago that used fish as natural samplers by resampling the same species today. Among resampled fish, those using freshwater food webs had the oldest <jats:sup>14</jats:sup>C ages (&gt; 1000 yr BP), while those using marine food webs had the youngest <jats:sup>14</jats:sup>C ages (near modern). One migratory species encompassed the entire range of <jats:sup>14</jats:sup>C ages because juveniles fed in freshwater streams and adults fed in offshore marine habitats. Over ~ 40 yr, average <jats:sup>14</jats:sup>C ages of freshwater and marine feeding fish shifted closer to atmospheric values, suggesting a potential influence from “greening of the Arctic.”","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142377344","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}
引用次数: 0
Dense vegetation hinders sediment transport toward saltmarsh interiors 茂密的植被阻碍了沉积物向盐沼内部的迁移
IF 7.8 2区 地球科学
Limnology and Oceanography Letters Pub Date : 2024-10-03 DOI: 10.1002/lol2.10436
Olivier Gourgue, Jean‐Philippe Belliard, Yiyang Xu, Maarten G. Kleinhans, Sergio Fagherazzi, Stijn Temmerman
{"title":"Dense vegetation hinders sediment transport toward saltmarsh interiors","authors":"Olivier Gourgue, Jean‐Philippe Belliard, Yiyang Xu, Maarten G. Kleinhans, Sergio Fagherazzi, Stijn Temmerman","doi":"10.1002/lol2.10436","DOIUrl":"https://doi.org/10.1002/lol2.10436","url":null,"abstract":"To save saltmarshes and their valuable ecosystem services from sea level rise, it is crucial to understand their natural ability to gain elevation by sediment accretion. In that context, a widely accepted paradigm is that dense vegetation favors sediment accretion and hence saltmarsh resilience to sea level rise. Here, however, we reveal how dense vegetation can inhibit sediment accretion on saltmarsh platforms. Using a process‐based modeling approach to simulate biogeomorphic development of typical saltmarsh landscapes, we identify two key mechanisms by which vegetation hinders sediment transport from tidal channels toward saltmarsh interiors. First, vegetation concentrates tidal flow and sediment transport inside channels, reducing sediment supply to platforms. Second, vegetation enhances sediment deposition near channels, limiting sediment availability for platform interiors. Our findings suggest that the resilience of saltmarshes to sea level rise may be more limited than previously thought.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142374394","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}
引用次数: 0
Disaster avoided: current state of the Baltic Sea without human intervention to reduce nutrient loads 避免灾难：在没有人为干预减少营养负荷的情况下波罗的海的现状
IF 7.8 2区 地球科学
Limnology and Oceanography Letters Pub Date : 2024-10-03 DOI: 10.1002/lol2.10443
Eva Ehrnsten, Christoph Humborg, Erik Gustafsson, Bo G. Gustafsson
{"title":"Disaster avoided: current state of the Baltic Sea without human intervention to reduce nutrient loads","authors":"Eva Ehrnsten, Christoph Humborg, Erik Gustafsson, Bo G. Gustafsson","doi":"10.1002/lol2.10443","DOIUrl":"https://doi.org/10.1002/lol2.10443","url":null,"abstract":"Excessive nutrient inputs have caused eutrophication of coastal ecosystems worldwide, triggering extensive algal blooms, oxygen‐depletion, and collapse of local fisheries. In the Baltic Sea, inputs of nitrogen (N) and phosphorus (P) have been significantly reduced since the 1980s, but the environmental state shows little to no signs of recovery. However, a simulation with continued high loads from the mid‐1980s demonstrates that while the state has not improved yet, it would be considerably worse today without the load reductions (e.g., 82% larger oxygen‐free bottom areas and 104% and 58% higher wintertime concentrations of inorganic N and P, respectively, in the Baltic Proper). Additional simulations with current nutrient loads continuing into the future indicate that conditions will likely improve in the coming decades. This study underscores the significance of acting on early warning signs of eutrophication, and furthermore how sustained efforts to decrease nutrient loads can mitigate the severity of eutrophication.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142374049","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}
引用次数: 0
Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and light 低光照 Prochlorococcus 生态型光系统结构对铁和光照的极端可塑性反应
IF 7.8 2区 地球科学
Limnology and Oceanography Letters Pub Date : 2024-09-28 DOI: 10.1002/lol2.10441
Xin Zhang, William G. Sunda, Haizheng Hong, Dalin Shi
{"title":"Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and light","authors":"Xin Zhang, William G. Sunda, Haizheng Hong, Dalin Shi","doi":"10.1002/lol2.10441","DOIUrl":"https://doi.org/10.1002/lol2.10441","url":null,"abstract":"Light affects the cellular iron (Fe) requirement of phytoplankton because of its presence in major photosynthetic proteins. Thus, interactions between variable Fe concentrations and light intensities could restrict photosynthetic carbon fixation in the ocean. Here we show a narrowing of the optimal light range for growth of a marine cyanobacterium, <jats:italic>Prochlorococcus</jats:italic> strain NATL1A, a member of LLI ecotype, under Fe limitation. The response of the cells to variations in Fe and light involved differential changes in the cellular content of low‐Fe photosystem II (PSII) and Fe‐rich photosystem I (PSI), and associated up to 23‐fold changes in PSII : PSI ratios, showing an unprecedented extreme plasticity of the photosynthetic apparatus. Our study demonstrated the physiological effects of Fe and light interactions on this low‐light‐adapted <jats:italic>Prochlorococcus</jats:italic> strain, and increases our understanding of the reasons for the wide distribution of this and possibly other <jats:italic>Prochlorococcus</jats:italic> strains in the ocean.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142328813","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}
引用次数: 0
Unexpected mismatches in population structure among marine mussel life‐history stages reveal the true scales of planktonic larval dispersal 海洋贻贝生命史各阶段种群结构的意外错配揭示了浮游幼体扩散的真实规模
IF 7.8 2区 地球科学
Limnology and Oceanography Letters Pub Date : 2024-09-23 DOI: 10.1002/lol2.10439
Jody‐Carynn Oliver, Francesca Porri, Arsalan Emami‐Khoyi, Peter R. Teske
{"title":"Unexpected mismatches in population structure among marine mussel life‐history stages reveal the true scales of planktonic larval dispersal","authors":"Jody‐Carynn Oliver, Francesca Porri, Arsalan Emami‐Khoyi, Peter R. Teske","doi":"10.1002/lol2.10439","DOIUrl":"https://doi.org/10.1002/lol2.10439","url":null,"abstract":"Studies investigating gene flow in sessile or sedentary marine species typically draw conclusions about larval dispersal by investigating genetic structure of adults. Here, we generated microsatellite data from adults, recruits, settlers and planktonic larvae of the brown mussel, <jats:italic>Perna perna</jats:italic>, from the southeast coast of South Africa, and identified a consistent mismatch in genetic structure between the adults and all earlier life stages. While adults could be assigned to two major geographical groups (western and eastern), most of the early‐stage mussels were strongly affiliated with the eastern group. This suggests that few of the early‐stage individuals present in the western portion of the sampling range will eventually establish themselves in the adult population, highlighting the importance of post‐recruitment processes as drivers of population structure. Our findings caution against the exclusive use of genetic data generated from adults to assess population connectivity facilitated by the dispersal of planktonic propagules.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142276940","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}
引用次数: 0
Correction to “Global subterranean estuaries modify groundwater nutrient loading to the ocean” 对 "全球地下河口改变了地下水对海洋的营养负荷 "的更正
IF 7.8 2区 地球科学
Limnology and Oceanography Letters Pub Date : 2024-09-20 DOI: 10.1002/lol2.10433
{"title":"Correction to “Global subterranean estuaries modify groundwater nutrient loading to the ocean”","authors":"","doi":"10.1002/lol2.10433","DOIUrl":"https://doi.org/10.1002/lol2.10433","url":null,"abstract":"","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":7.8,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142275554","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}
引用次数: 0
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