Limnology and Oceanography最新文献_第7页

Carbon production at shallow-water artificial reef ecosystems relies on water column primary productivity 浅水人工礁生态系统的碳产量依赖于水柱初级生产力

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-24 DOI: 10.1002/lno.70008

Traci Erin Cox, Kelly S. Boyle, Mark A. Albins, Sean P. Powers, Just Cebrian

{"title":"Carbon production at shallow-water artificial reef ecosystems relies on water column primary productivity","authors":"Traci Erin Cox, Kelly S. Boyle, Mark A. Albins, Sean P. Powers, Just Cebrian","doi":"10.1002/lno.70008","DOIUrl":"10.1002/lno.70008","url":null,"abstract":"The attraction-production continuum in fishery management centers on the extent to which artificial reefs increase fish production or whether they simply redistribute fish. Reef systems could produce carbon to support growth of higher trophic levels. Therefore, we aimed to understand carbon flows at lower trophic levels on shallow-water (11 m) artificial reefs within a region which hosts an extensive artificial reef network. We described benthic communities and quantified changes in oxygen content within in situ enclosures to assess reef, sediment, and water-column community metabolism. We tested spatial and temporal differences in metrics by repeatedly sampling at three sites across two seasons for 2 yrs. Suspension feeders were abundant on reef surfaces and these communities were often heterotrophic. In sediments, lancelets, amphipods, and bivalves were scarcer adjacent to the reef (2 m) and more numerous 20 m away. Infauna communities at adjacent reefs were significantly dissimilar, suggesting biotic (e.g., predation) and, or abiotic (e.g., sand scour) conditions cause large differences in infauna communities near reefs. Sediment and water-column communities were mostly autotrophic and net productivity did not consistently increase or decrease with distance from the reef. Metabolic metrics were often best explained by temporal intervals and site. The integrated system was autotrophic in 9 out of 11 instances where reef, sediment, and water-column contributed −0.46 to 0.27, −14.8 to 66.8, and 33.5% to 91.4% respectively to net system productivity. When planning artificial reef deployment projects with heterotrophic reefs, managers should ensure ample water-column space is provisioned to support them trophically.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 4","pages":"1075-1092"},"PeriodicalIF":3.8,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599550","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}

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Transport and retention of microplastic fibers in streams are impacted by benthic algae, discharge, and substrate 溪流中微塑料纤维的迁移和滞留受到底栖藻类、排水量和底质的影响

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-24 DOI: 10.1002/lno.70003

Elizabeth M. Berg, Shannon Speir, Arial J. Shogren, Martha M. Dee, Anna E. S. Vincent, Jennifer L. Tank, John J. Kelly, Timothy J. Hoellein

{"title":"Transport and retention of microplastic fibers in streams are impacted by benthic algae, discharge, and substrate","authors":"Elizabeth M. Berg, Shannon Speir, Arial J. Shogren, Martha M. Dee, Anna E. S. Vincent, Jennifer L. Tank, John J. Kelly, Timothy J. Hoellein","doi":"10.1002/lno.70003","DOIUrl":"10.1002/lno.70003","url":null,"abstract":"Microplastics (particles < 5 mm) are pollutants of emerging concern in aquatic ecosystems worldwide. Streams are key sites of microplastic input, retention, and transport, and empirical measurements of microplastic movement in lotic ecosystems are needed to inform global microplastic budgets. However, factors that influence microplastic retention in lotic ecosystems are not well studied. We used particle spiraling metrics to directly measure microplastic retention following pulse releases of polyester fibers using outdoor, experimental streams lined with substrates of varying sizes. We tested the impact of benthic algae, stream discharge, and substrate type on the transport of experimentally added microplastic fibers. We also quantified microplastic retention in and release from the stream benthos after an increase in discharge to simulate a storm event. Microplastic deposition rates were significantly higher with (1) well-established benthic algal biofilms, (2) higher stream discharge, and (3) larger benthic substrate. The increase in microplastic deposition rates with elevated discharge is opposite the expected trend observed for particulate organic matter, indicating distinct retention processes for microplastics. A rapid increase in discharge in our experimental streams resulted in resuspension of retained microplastic from all substrate types, suggesting that storm events could trigger microplastic release in natural streams. The results from this study provide direct measurements of the magnitude and direction of factors that drive microplastic retention in streams, which will contribute to the parameterization of models for microplastic deposition (and release) at larger spatial and temporal scales for freshwater ecosystems.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 4","pages":"1093-1107"},"PeriodicalIF":3.8,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599548","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}

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Issue Information & Members 发行信息及会员

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-18 DOI: 10.1002/lno.70011

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Issue Information & Masthead 发行信息和报头

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

引用次数: 0

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 3.8 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":"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":"70 4","pages":"989-1000"},"PeriodicalIF":3.8,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70000","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":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Carbon dioxide–induced acidification enhances short-lived brominated hydrocarbons production in oligotrophic oceans 在低营养海洋中，二氧化碳引起的酸化增加了短寿命的溴化碳氢化合物的生产

IF 3.8 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":"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":"70 4","pages":"1016-1031"},"PeriodicalIF":3.8,"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

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 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-02-13 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":"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":"70 4","pages":"1032-1045"},"PeriodicalIF":3.8,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70005","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":"OA","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 从干旱引起的枯死中恢复可能导致盐沼植被组成的改变

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