Limnology and Oceanography最新文献_第5页

Issue Information & Masthead

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-18 DOI: 10.1002/lno.12802

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Issue Information & TOC 发行信息和目录

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-18 DOI: 10.1002/lno.70010

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Issue Information & Copyright 发行信息和版权

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-18 DOI: 10.1002/lno.70009

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Limited microbial degradation of elevated concentrations of dissolved organic carbon in the deep ocean 深海中高浓度溶解有机碳的微生物降解能力有限

IF 4.5 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-17 DOI: 10.1002/lno.70000

Tao Liu, Yixian Li, Yuan Shen

{"title":"Limited microbial degradation of elevated concentrations of dissolved organic carbon in the deep ocean","authors":"Tao Liu, Yixian Li, Yuan Shen","doi":"10.1002/lno.70000","DOIUrl":"https://doi.org/10.1002/lno.70000","url":null,"abstract":"Understanding the ocean's capacity potential to store dissolved organic carbon (DOC) is essential for predicting its role in long‐term carbon sequestration and climate regulation. This capacity hinges on the behavior of DOC at elevated concentrations, a critical yet unresolved question that has produced mixed results due to narrow concentration ranges tested previously and limited molecular insights. This study addresses these gaps by investigating microbial degradation of DOC across a broad concentration range (2‐ to 55‐fold) in year‐long bioassay experiments using solid‐phase extracted DOC (SPE‐DOC) from 2000‐m‐deep waters. Specific SPE‐DOC compounds (combined amino acids) were analyzed to provide a molecular‐level understanding of DOC reactivity at varying concentrations. Our results show that microbial communities rapidly proliferated and became more uniform following SPE‐DOC amendments, with Nitrosococcales, Flavobacteriales, and Alteromonadales dominating. Despite these shifts, microbial utilization of SPE‐DOC was constrained, exhibiting a nonlinear relationship with concentration, from < 3% in the control to a maximum of 9% in DOC‐enriched groups. Degradation was predominantly confined to the initial 28 d, with negligible additional removal (0–2%) thereafter. Compound‐specific analysis showed only moderate utilization (7–11%) of amino acid compounds within the first 3 d, indicating restricted microbial access even when these individual compounds were concentrated. These results indicate that a fraction of deep‐sea DOC molecules can persist for long at elevated concentrations. Our study demonstrates the ocean's substantial potential for DOC storage and suggests that modern ocean is capable of accommodating a larger DOC reservoir than is currently present.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"30 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427160","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}

引用次数: 0

Differences in bed elevation shape subtidal mussel bed stability under high‐energy hydrodynamic events 高能水动力事件下潮下带贻贝海床稳定性的差异

IF 4.5 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-14 DOI: 10.1002/lno.70005

Zhiyuan Zhao, Jaco C. de Smit, Jacob J. Capelle, Tim Grandjean, Mingxuan Wu, Theo Gerkema, Johan van de Koppel, Tjeerd J. Bouma

{"title":"Differences in bed elevation shape subtidal mussel bed stability under high‐energy hydrodynamic events","authors":"Zhiyuan Zhao, Jaco C. de Smit, Jacob J. Capelle, Tim Grandjean, Mingxuan Wu, Theo Gerkema, Johan van de Koppel, Tjeerd J. Bouma","doi":"10.1002/lno.70005","DOIUrl":"https://doi.org/10.1002/lno.70005","url":null,"abstract":"Escalating high‐energy hydrodynamic events, like storms, represent a significant manifestation of global climate change, causing detrimental impacts on various ecosystems and potentially triggering thresholds that result in abrupt shifts in ecosystem states. Despite the potential of such thresholds, few studies have explicitly addressed them. This gap is particularly notable for subtidal ecosystems due to technological challenges in detecting responses of organisms enduring constant submersion. This study focused on subtidal soft‐bottom mussel beds through the development of Biophys loggers for in situ monitoring of the fine‐scale behavior of mussel clusters under hydrodynamic disturbances and a statistical model based on an 11‐yr dataset to perform regional‐scale assessments of mussel bed stability. Multisite monitoring in the Dutch Wadden Sea revealed spatial heterogeneity in mussel bed mobility threshold (i.e., near‐bed orbital velocity inducing mussel movement), with predictable patterns along elevation gradients. Stability assessment in this region demonstrated that mussel beds in shallower areas (i.e., at higher bed elevations) exhibited higher stability than those in deeper areas, a difference that was attributed to the longer return interval of the mobility thresholds in shallow regions. These findings suggest that conditions such as bed elevation can modulate the stress tolerance of mussels and thereby influence the stability of subtidal soft‐bottom mussel beds. This study provides an approach for assessing mussel bed stability, which can also be extended to other comparable ecosystems, such as oyster reefs, to address their stability under climate change, thereby informing strategic management.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"68 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143417972","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}

引用次数: 0

Carbon dioxide–induced acidification enhances short‐lived brominated hydrocarbons production in oligotrophic oceans

IF 4.5 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-13 DOI: 10.1002/lno.70004

Ya‐Wen Zou, Cheng‐Xuan Li, Qin‐Sheng Wei, Qian‐Yao Ma, Hui Ding, Xiao Meng Duan, Xing Zhai, Bao‐Dong Wang

{"title":"Carbon dioxide–induced acidification enhances short‐lived brominated hydrocarbons production in oligotrophic oceans","authors":"Ya‐Wen Zou, Cheng‐Xuan Li, Qin‐Sheng Wei, Qian‐Yao Ma, Hui Ding, Xiao Meng Duan, Xing Zhai, Bao‐Dong Wang","doi":"10.1002/lno.70004","DOIUrl":"https://doi.org/10.1002/lno.70004","url":null,"abstract":"Oceanic emission is a primary source of brominated very short‐lived substances (BrVSLs) to the atmosphere, which have important effects on stratospheric ozone chemistry. Marine biogeochemical processes regulating BrVSLs are often sensitive to ocean acidification. Yet, the response of BrVSLs production to acidification remains poorly understood. Herein, the effects of acidification on the production of two main BrVSLs, dibromomethane (CH2Br2) and tribromomethane (CHBr3), were studied by ship‐based incubation experiments at three stations in the South Atlantic and Indian Oceans. The average CH2Br2 and CHBr3 concentrations increased by 17.2–58.7% and 14.3–80.3% due to acidification under the in situ nutrient conditions with nutrient and/or iron limitation at the three stations, but the mechanisms driving these increases varied among different regions. The increased bromoperoxidase (BrPO) activity caused by acidification facilitated BrVSLs release in the Eastern Tropical Indian Ocean, where diatoms were dominant. CHBr3 increased due to acidification as a result of enhanced reactivity of dissolved organic matter (DOM) in the Eastern Tropical Atlantic, where dinoflagellates were dominant. Brominated very short‐lived substances increased due to acidification as a result of a combined effect of the above two mechanisms in the Benguela Current Coastal with high phytoplankton abundance. Under the nutrient and/or iron addition conditions with nutrient and iron sufficiency, however, acidification did not promote BrVSLs production due to its only minor effect on the BrPO activity and reactivity of DOM, partly because the effect of increased oxidative stress was offset by that of changed phytoplankton composition. Our study provided a basis for future modeling on the impact of acidification on global BrVSLs emissions.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"16 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143401277","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}

引用次数: 0

Pre‐aged organic matter dominates organic carbon burial in a major perialpine lake system

IF 4.5 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-11 DOI: 10.1002/lno.12815

Benedict V. A. Mittelbach, Alexander S. Brunmayr, Margot E. White, Timo M. Y. Rhyner, Negar Haghipour, Thomas M. Blattmann, Martin Wessels, Nathalie Dubois, Timothy I. Eglinton

{"title":"Pre‐aged organic matter dominates organic carbon burial in a major perialpine lake system","authors":"Benedict V. A. Mittelbach, Alexander S. Brunmayr, Margot E. White, Timo M. Y. Rhyner, Negar Haghipour, Thomas M. Blattmann, Martin Wessels, Nathalie Dubois, Timothy I. Eglinton","doi":"10.1002/lno.12815","DOIUrl":"https://doi.org/10.1002/lno.12815","url":null,"abstract":"Organic carbon (OC) burial in lake sediments is comparable to that in marine sediments globally. However, climatic and carbon cycle implications depend on the origin of buried OC. This study utilizes high‐resolution radiocarbon (14C) measurements in combination with stable carbon isotopes (13C) and total organic carbon/total nitrogen ratios to constrain sources and ages of OC deposited since the early 20th century in Lake Constance, the second‐largest lake in central Europe. We differentiate between aquatic, pre‐aged soil, and fossil rock‐derived (petrogenic) OC. The shape and magnitude of the 14C bomb spike recorded in the sediment profile indicate the sequestration of recently synthesized biospheric OC with a complex overlay from different OC sources. We find that soil‐derived OC is the dominant component of sedimentary OC, with a mean transit time in the catchment of around 110 yr. Additionally, we quantified the 14C dynamics of dissolved inorganic carbon in the lake, which can be modeled with a mean transit time of around 10 yr. An ordinary kriging spatial analysis revealed that the Alpine Rhine delta and the profundal areas are the primary loci for allochthonous OC deposition. Lake‐wide surface sediment OC fluxes were spatially heterogeneous but averaged 52.0 gC m−2 yr−1, where 26.7 gC m−2 yr−1 of mostly stable, allochthonous OC are buried long term. This study highlights the necessity of accounting for both pre‐aged and fossil OC sources, as well as spatial heterogeneity, when assessing the response of lakes and, more broadly, source‐to‐sink systems to ongoing climate and ecosystem change.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"10 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143393044","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}

引用次数: 0

Recovery from drought-induced dieback may lead to modified salt marsh vegetation composition

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-10 DOI: 10.1002/lno.12795

Zhicheng Yang, Andrea D'Alpaos, Marco Marani, Tegan Blount, Merryl Alber, Brad Murray, Sonia Silvestri

{"title":"Recovery from drought-induced dieback may lead to modified salt marsh vegetation composition","authors":"Zhicheng Yang, Andrea D'Alpaos, Marco Marani, Tegan Blount, Merryl Alber, Brad Murray, Sonia Silvestri","doi":"10.1002/lno.12795","DOIUrl":"10.1002/lno.12795","url":null,"abstract":"Salt marshes are vital but vulnerable ecosystems. However, our understanding of disturbance-induced dieback and recovery processes in multi-specific marshes remains limited. This study utilized remote sensing data (2001–2021) to analyze a dieback event and subsequent recovery in the multi-specific San Felice marsh within the Venice lagoon, Italy. A significant dieback of Spartina maritima (Spartina) was identified in 2003, likely triggered by a drought event and heat stress. This resulted in a conversion of 4.6 ha of marsh predominantly colonized by Spartina (fractional cover of Spartina > 50%) in 2001 to bare soil in 2003. These bare areas were then gradually encroached by vegetation, indicating the occurrence of the recovery. Despite gradually gaining ground, Spartina only dominated 6.4 ha marshes in 2021, significantly lower than its pre-dieback area (21.3 ha). However, other species also encroached on the dieback area, such that the aboveground biomass returned to pre-dieback levels, indicating that the shift in marsh species composition that occurred as a consequence of the event compensated for this ecosystem service. Vegetation recovery, spanning from 1 yr to more than 18 yr, was found to be slowest in areas of lowest elevation. This study provides evidence that dieback and recovery can modify the species composition of multi-specific marshes over decades. These insights contribute to a better understanding of marsh resilience to drought and elevated temperature, both of which are likely to increase in the future.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 3","pages":"792-805"},"PeriodicalIF":3.8,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.12795","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143393043","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}

引用次数: 0

Prey particle surface property mediates differential selection by the ubiquitous appendicularian Oikopleura dioica

IF 4.5 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-07 DOI: 10.1002/lno.12819

Terra C. Hiebert, Anne E. Aasjord, Daniel M. Chourrout, Anne W. Thompson, Kelly R. Sutherland

{"title":"Prey particle surface property mediates differential selection by the ubiquitous appendicularian Oikopleura dioica","authors":"Terra C. Hiebert, Anne E. Aasjord, Daniel M. Chourrout, Anne W. Thompson, Kelly R. Sutherland","doi":"10.1002/lno.12819","DOIUrl":"https://doi.org/10.1002/lno.12819","url":null,"abstract":"Cell surface properties can strongly mediate microbial interactions with predators in soil and host‐pathogen systems. Yet, the role of microbial surface properties in avoiding or enhancing predation in the ocean is less well known. Appendicularians are globally abundant marine suspension feeders that capture marine microorganisms in a complex mucous filtration system. We used artificial microspheres to test whether the surface properties of prey particles influenced selection by the appendicularian, Oikopleura dioica. We used a range of microsphere sizes (0.5, 1, 2, and 3 μm), concentrations (~ 103–106 particles mL−1), and two charges (amine‐modified, more positive vs. carboxylate‐modified, more negative) to represent open‐ocean microbial communities. We found that appendicularians selected between the particles of different charge. More negatively charged particles were enriched in the gut by up to 3.8‐fold, while more positive particles were enriched in the mucous filters by up to 4.7‐fold, leading to different particle fates. These results expand understanding of the mechanisms by which filter‐feeders select between prey and reveal a mechanism by which marine bacteria could rapidly alter their susceptibility to predation, either through adaption or acclimation.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"12 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258604","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}

引用次数: 0

Lake chlorophyll responses to drought are related to lake type, connectivity, and ecological context across the conterminous United States

IF 4.5 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-06 DOI: 10.1002/lno.12817

Xinyu Sun, Kendra S. Cheruvelil, Patrick J. Hanly, Patricia A. Soranno

{"title":"Lake chlorophyll responses to drought are related to lake type, connectivity, and ecological context across the conterminous United States","authors":"Xinyu Sun, Kendra S. Cheruvelil, Patrick J. Hanly, Patricia A. Soranno","doi":"10.1002/lno.12817","DOIUrl":"https://doi.org/10.1002/lno.12817","url":null,"abstract":"Local and regional‐scaled studies point to the important role of lake type (natural lakes vs. reservoirs), surface water connectivity, and ecological context (multi‐scaled natural settings and human factors) in mediating lake responses to disturbances like drought. However, we lack an understanding at the macroscale that incorporates multiple scales (lake, watershed, region) and a variety of ecological contexts. Therefore, we used data from the LAGOS‐US research platform and applied a local water year timeframe to 62,927 US natural lakes and reservoirs across 17 ecoregions to examine how chlorophyll a responds to drought across various ecological contexts. We evaluated chlorophyll a changes relative to each lake's baseline and drought year. Drought led to lower and higher chlorophyll a in 18% and 20%, respectively, of lakes (both natural lakes and reservoirs included). Natural lakes had higher magnitudes of change and probabilities of increasing chlorophyll a during droughts than reservoirs, and these differences were particularly pronounced in isolated and highly‐connected lakes. Drought responses were also related to long‐term average lake chlorophyll a in complex ways, with a positive correlation in less productive lakes and a negative correlation in more productive lakes, and more pronounced drought responses in higher‐productivity lakes than lower‐productivity lakes. Thus, lake chlorophyll responses to drought are related to interactions between lake type and surface connectivity, long‐term average chlorophyll a, and many other multi‐scaled ecological factors (e.g., soil erodibility, minimum air temperature). These results reinforce the importance of integrating multi‐scaled ecological context to determine and predict the impacts of global changes on lakes.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"79 2 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143192063","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}

引用次数: 0