Limnology and Oceanography最新文献

{"title":"Smaller phytoplankton size-groups control the stoichiometry of the autotrophic community","authors":"Thomas Mollica,&nbsp;Hanna Farnelid,&nbsp;Elin Lindehoff,&nbsp;Catherine Legrand","doi":"10.1002/lno.70058","DOIUrl":"10.1002/lno.70058","url":null,"abstract":"<p>In the marine environment, the prevailing paradigm is that larger organisms like diatoms are primary contributors to phytoplankton stoichiometry. Numerous studies investigated the stoichiometry of phytoplankton groups or total community but its dynamics among different size-groups are not resolved. In exploring the influence of phytoplankton community composition and succession on seasonal stoichiometry in the Baltic Sea, our study reveals that smaller size-groups, such as nanoplankton and picoplankton, play a more significant role than traditionally thought. During seasonal transitions in nutrient availability—from nutrient-rich spring conditions favoring diatoms and dinoflagellates to nitrogen-limited summer conditions favorable for cyanobacteria—the Baltic Proper exhibits marked shifts in community structure and offers a unique system to investigate stoichiometric dynamics. Our yearly sampling at an offshore station using a size-fraction protocol unveils that the stoichiometry within larger size fractions (&gt; 20 <i>μ</i>m) does not reflect the overall community's stoichiometry. Instead, nanoplankton and picoplankton dominate nutrient cycling processes despite their smaller size. On any occasion, they represent between 55% and 90% of the biomass making them critical for nitrogen and phosphorus uptake and photosynthetic carbon fixation. These findings challenge the plankton stoichiometry paradigm and highlight the necessity to include these smaller phytoplankton groups into future climate change models to improve predictions regarding ecosystem responses to eutrophication and environmental changes.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 7","pages":"1947-1961"},"PeriodicalIF":3.8,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70058","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144176580","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":"The interaction of regional and local drivers shapes summer ecosystem metabolism in lakes across Canada","authors":"Amir Reza Shahabinia,&nbsp;Matthew J. Bogard,&nbsp;Paul A. del Giorgio","doi":"10.1002/lno.70095","DOIUrl":"10.1002/lno.70095","url":null,"abstract":"<p>Assessments of lake gross primary production (GPP) and respiration (R) and their balance (net ecosystem production, NEP) have been limited to specific watersheds and a limited number of lakes, often along narrow environmental gradients. This is because conventional approaches require either lengthy incubations or the deployment of monitoring equipment, none of which are feasible for large-scale studies. Here we present a macroscale study of lake metabolism and explore the patterns and drivers of GPP, R, and NEP in lakes across Canada as part of the LakePulse network. We measured summertime water column metabolic rates in 742 lakes, using an oxygen isotopic (δ¹⁸O₂) approach, which provide an integrative snapshot of mixed-layer metabolism in stratified lakes, or whole-lake metabolism in polymictic lakes. The lakes were distributed across the five major Canadian continental drainage basins, covering a wide range of in-lake, land use, and climatic features. Gross primary production and R varied by four orders of magnitude across lakes and regions, driven by factors such as total phosphorus and nitrogen, dissolved organic carbon, and chlorophyll. Net ecosystem production had a weak but significant positive linear relationship with water column light and a negative relationship with colored dissolved organic matter. Our results reveal systematic differences in regional baseline GPP and R driven by landscape properties such as altitude, and that lake metabolism in some regions may be more sensitive to eutrophication and browning, mediated by regional hydrology, which is itself linked to climate.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 7","pages":"1962-1980"},"PeriodicalIF":3.8,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70095","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144176623","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":"Eutrophication-induced dinoflagellate succession contributes to marine carbon sequestration through refractory dissolved organic matter accumulation","authors":"Fu-Tao Fang,&nbsp;Zhuo-Yi Zhu,&nbsp;Yuan-Bi Yi,&nbsp;Ding He,&nbsp;Hong-Yan Bao,&nbsp;En-Ren Zhang,&nbsp;Cheng-Xu Zhou","doi":"10.1002/lno.70097","DOIUrl":"10.1002/lno.70097","url":null,"abstract":"<p>The increasing eutrophication of coastal seas is causing a shift in the most important phytoplankton groups from diatoms to dinoflagellates, but its feedback to marine carbon cycling remains unclear. Here, we investigated the potential of the key coastal phytoplankton, the diatom <i>Skeletonema costatum</i>, and the dinoflagellate <i>Prorocentrum donghaiense</i>, for refractory dissolved organic carbon (DOC) accumulation over dark degradation incubations of 70 d. Our multi-method approach showed that dinoflagellate detritus, rather than diatom detritus, significantly contributes to refractory DOC. This is evidenced by the fact that the detritus of dinoflagellates compared to that of diatoms (1) has a weaker transmittance in infrared spectrometry, indicating a lower content of labile organic substances (alcohol and amide groups); (2) has a higher release and/or transformation efficiency of particulate organic carbon to DOC (81% vs. 50%); (3) has a lower content of labile fraction, amino acid (8% vs. 17% carbon) and exhibits lower degradability of the DOC formed (23% vs. 30%); (4) has a lower content of labile compounds determined by Fourier transform ion cyclotron resonance mass spectrometry (maximum molecular lability boundary: 21% vs. 31%); and (5) has a higher proportion of refractory carboxylic-rich alicyclic molecules (57% ± 0.5% vs. 51% ± 0.7%) over incubations. Our results emphasize that eutrophication-triggered coastal dinoflagellate succession has a significant potential for positive feedback to carbon sequestration through the formation of refractory DOC.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 7","pages":"1992-2001"},"PeriodicalIF":3.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153309","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":"Vertical microbial fluxes in a modern permanently redox-stratified lake provide insights into organic carbon sequestration and benthic–pelagic coupling during the Proterozoic Eon","authors":"Ashley B. Cohen,&nbsp;Vanja Klepac-Ceraj,&nbsp;Kristen Bidas,&nbsp;Felix Weber,&nbsp;Arkadiy I. Garber,&nbsp;Lisa N. Christensen,&nbsp;Milana Yagudaeva,&nbsp;Jacob A. Cram,&nbsp;Michael L. McCormick,&nbsp;Gordon T. Taylor","doi":"10.1002/lno.70096","DOIUrl":"10.1002/lno.70096","url":null,"abstract":"<p>Microbial processes regulating carbon cycling in ancient oceans remain poorly understood, yet characterizing these processes is critical for understanding early Earth biogeochemistry. Here, we investigate microbial communities associated with sinking particles regulating carbon cycling in meromictic Fayetteville Green Lake, a mid-Proterozoic marginal ocean analog. The lake's photic zone spans oxic through sulfidic conditions, where prokaryotic photoautotrophs contribute to sinking fluxes and organotrophs mediate remineralization across redox and irradiance gradients. To characterize microbial communities in the sinking flux over time and redox condition, we sequenced 16S rRNA amplicons recovered from sediment traps throughout the lake's water column over the course of an annual photoautotroph bloom. Purple sulfur bacteria dominated deep fluxes, while cyanobacteria and green sulfur bacteria contributed variably across depths but were more abundant in suspended communities. As the bloom waned, chemoautotrophic Epsilonbacteraeota gained dominance in deeper fluxes, possibly due to niche partitioning. The shallow flux was remineralized by microbes exposed to temporally fluctuating biogeochemical conditions. Putative temporal changes in the availability and quality of organic matter and terminal electron acceptors thus promoted a succession of low-diversity communities with few dominant hydrolytic and acidogenic clades. Unchanging conditions at depth promoted higher diversity microbial communities with niches for specialists dominated by sulfur-metabolizing and fermentative clades. These findings improve our understanding of carbon cycling in the ancient ocean and offer insights into future shifts under climate change and meromixis in lakes.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 7","pages":"1930-1946"},"PeriodicalIF":3.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153311","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":"Highly mobile pelagic species co-occur with fine-scale ocean fronts","authors":"Alexandre Lhériau-Nice,&nbsp;Denham G. Cook,&nbsp;Alice Della Penna","doi":"10.1002/lno.70083","DOIUrl":"10.1002/lno.70083","url":null,"abstract":"<p>Coastal areas are an important source of food and a valuable tourism asset for communities, but also highly dynamic and heterogeneous environments. Understanding how marine species respond to the variability of their habitat is essential to sustainably manage coastal resources. Here we investigate the distribution of highly mobile marine species in relation to fine-scale fronts (&lt; 10 km) in North-East Aotearoa New Zealand. We use fishery dependent catch and aerial observations to assess species distribution and compare their locations to the position of fronts tracked using high-resolution ocean color images. We find significant aggregation near fine-scale surface chlorophyll <i>a</i> fronts for most species considered. Specifically blue mackerel, kahawai, and jack mackerel are most often found in regions of moderate to high chlorophyll <i>a</i> and characterized by strong spatial gradients in ocean color. On the other hand, seabirds and mammals collocated most often with higher chlorophyll <i>a</i> concentrations and lower gradients compared to the other species examined. These findings advance our understanding of how mobile marine species interact with fine-scale coastal fronts, suggesting that these features and their variability need to be accounted explicitly for habitat modeling and effective management.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 7","pages":"1901-1912"},"PeriodicalIF":3.8,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70083","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130662","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":"Plankton communities today and tomorrow—potential impacts of multiple global change drivers and marine heatwaves","authors":"Cédric L. Meunier, Josefin Schmidt, Antonia Ahme, Areti Balkoni, Katharina Berg, Lea Blum, Maarten Boersma, Jan D. Brüwer, Bernhard M. Fuchs, Luis Gimenez, Maïté Guignard, Ruben Schulte‐Hillen, Bernd Krock, Johannes Rick, Herwig Stibor, Maria Stockenreiter, Simon Tulatz, Felix Weber, Antje Wichels, Karen Helen Wiltshire, Sylke Wohlrab, Inga V. Kirstein","doi":"10.1002/lno.70042","DOIUrl":"https://doi.org/10.1002/lno.70042","url":null,"abstract":"In the context of global change, marine organisms are subjected not only to gradual changes in abiotic parameters, but also to an increasing number of extreme events, such as heatwaves. However, we still know little about the influence of heatwaves on the structure of marine communities, and experimental studies are needed to test the impact of heatwaves alone and in combination with other environmental drivers. Here, we conducted a mesocosm experiment to assess the potential impact of heatwaves on plankton communities, which we did under ambient and future environmental conditions. To simulate future environmental conditions, we simultaneously manipulated temperature and pH based on IPCC predictions for 2100, and dissolved N : P ratios based on the conditions expected in European coastal zones. While we did not observe any effects of simulated heatwaves on phytoplankton abundances, we identified that future environmental conditions may favor smaller phytoplankton species and that additional heatwaves may especially favor small phytoflagellates and coccolithophores. We also observed that future environmental conditions may reduce the abundances and modify the species composition of bacterioplankton, microzooplankton, and mesozooplankton, and that heatwaves may exacerbate these effects. Using a unique approach to examine the potential impacts of heatwaves under current and future environmental conditions on a natural multi‐trophic marine plankton community, we show that the combination of multiple global change drivers has the potential to perturb the entire basis of marine food webs.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"8 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144113423","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":"Regulation of surface carbon dioxide distributions and air–sea fluxes by temperature, biology, and mixing along the North American Atlantic Coastal Ocean Margin","authors":"Zelun Wu,&nbsp;Xinyu Li,&nbsp;Zhangxian Ouyang,&nbsp;Wei-Jun Cai","doi":"10.1002/lno.70073","DOIUrl":"10.1002/lno.70073","url":null,"abstract":"<p>The North American Atlantic Coastal Ocean Margin (NAACOM) was recognized as an atmospheric carbon dioxide (CO₂) sink, with large uncertainties in its northern areas due to complex dynamics in controlling the spatiotemporal variability of surface partial pressure of CO₂ (<i>p</i>CO₂) and limited <i>p</i>CO₂ observations. Here, we used a regional reconstructed product to investigate the spatial and seasonal variability of <i>p</i>CO₂ and air–sea CO₂ fluxes across the region during 1993–2021. Decomposition of <i>p</i>CO₂ variability reveals temperature as the primary driver in southern sub-regions (Gulf of Mexico, South and Mid Atlantic Bight), while both thermal and nonthermal processes dominate in the north (Gulf of Maine, Scotian Shelf, Gulf of St. Lawrence, and Grand Banks), with winter deep mixing leading to <i>p</i>CO₂ elevation, and spring phytoplankton production significantly influencing <i>p</i>CO₂ drawdown. These regional differences in local dynamics result in greater air–sea CO₂ disequilibrium in the north, driving larger seasonal <i>p</i>CO₂ amplitudes, and a pronounced south-to-north decreasing gradient. We identified the entire region as a CO₂ sink, with fluxes of −0.63 ± 0.19 and −0.60 ± 0.21 mol C m⁻² yr⁻¹ (10.14 ± 3.00 and 24.24 ± 8.31 Tg C yr⁻¹), respectively, in the narrow (depth &lt; 200 m) and wide (distance from shoreline &lt; 400 km) ocean margins. The updated wide-margin CO₂ uptake is 61% lower than previous reports. This 29-yr analysis elucidates the drivers of <i>p</i>CO₂ variability across the diverse NAACOM, highlighting the importance of regional <i>p</i>CO₂ products for improving coastal carbon systems projections in a changing climate.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 7","pages":"1867-1882"},"PeriodicalIF":3.8,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144113424","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":"RETRACTION: Future Warming Stimulates Growth and Photosynthesis in an Arctic Microalga More Strongly than Changes in Light Intensity or pCO2","authors":"","doi":"10.1002/lno.70094","DOIUrl":"10.1002/lno.70094","url":null,"abstract":"<p><b>RETRACTION:</b> <span>S.D. Rokitta</span>, <span>C.H. Grossmann</span>, <span>E. Werner</span>, <span>J. Moye</span>, <span>G. Castellani</span>, <span>E.M. Nöthig</span>, and <span>B. Rost</span>, “ <span>Future Warming Stimulates Growth and Photosynthesis in an Arctic Microalga More Strongly than Changes in Light Intensity or pCO₂</span>,” <i>Limnology and Oceanography</i> <span>68</span>, no. <span>12</span> (<span>2023</span>): <span>2789</span>–<span>2799</span>, https://doi.org/10.1002/lno.12460.</p><p>The above article, published online on 29 November 2023 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors; the journal Editor-in-Chief, K. David Hambright; and John Wiley &amp; Sons, Inc. The retraction has been agreed due to an error in the identification of a species in the study. Subsequent sequencing runs performed by the authors revealed that the alga species was not <i>Phaeocystis pouchetii</i> as originally reported but rather was identified as <i>Isochrysis,</i> a closely related haptophyte. As a result, the conclusions reported in the article are not considered reliable, as they pertain to a different taxon than originally reported. A revised version of this article will be submitted for consideration for publication.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 7","pages":""},"PeriodicalIF":3.8,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70094","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144104192","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":"Pre-existing phytoplankton biomass concentrations shape coastal plankton response to fire-generated ash leachate","authors":"Nicholas Baetge,&nbsp;Kimberly H. Halsey,&nbsp;Erin J. Hanan,&nbsp;Michael J. Behrenfeld,&nbsp;Allen J. Milligan,&nbsp;Jason R. Graff,&nbsp;Parker Hansen,&nbsp;Craig A. Carlson,&nbsp;Rene M. Boiteau,&nbsp;Eleanor C. Arrington,&nbsp;Jacqueline Comstock,&nbsp;Elisa R. Halewood,&nbsp;Elizabeth L. Harvey,&nbsp;Norman B. Nelson,&nbsp;Keri Opalk,&nbsp;Brian Ver Wey","doi":"10.1002/lno.70087","DOIUrl":"10.1002/lno.70087","url":null,"abstract":"<p>Climate-driven warming is projected to intensify wildfires, increasing their frequency and severity globally. Wildfires are an increasingly significant source of atmospheric deposition, delivering nutrients, organic matter, and trace metals to coastal and open ocean waters. These inputs have the potential to fertilize or inhibit microbial growth, yet their ecological impacts remain poorly understood. This study examines how ash leachate, derived from the 2017 Thomas Fire in California and lab-produced ash from Oregon vegetation, affects coastal plankton communities. Shipboard experiments off the California coast examined how pre-existing plankton biomass concentrations mediate responses to ash leachates. We found that ash leachate contained dissolved organic matter (DOM) that significantly increased bacterioplankton specific growth rates and DOM remineralization rates but had a negligible effect on bacterioplankton growth efficiency, suggesting low DOM bioavailability. Furthermore, ash-derived DOM had a higher potential to accumulate in high biomass water, where pre-existing DOM substrates may better support bacterial metabolism. Ash leachate had a neutral to negative effect on phytoplankton division rates and decreased microzooplankton grazing rates, particularly in low biomass water, leading to increased phytoplankton accumulation. Nanoeukaryotes accumulated in low biomass water, whereas picoeukaryotes and <i>Synechococcus</i> accumulated in high biomass water. Our findings suggest that the influence of ash deposition on DOM cycling, phytoplankton accumulation, and broader marine food web dynamics depends on pre-existing biomass levels. Understanding these interactions is critical for predicting the biogeochemical consequences of increasing wildfire activity on marine ecosystems.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 7","pages":"1883-1900"},"PeriodicalIF":3.8,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70087","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144113425","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":"The grazing impact of megaherbivores on sediment accumulation and stabilization functions of seagrass meadows in a subtropical coral reef lagoon","authors":"Toshihiro Miyajima,&nbsp;Takashi Nakamura,&nbsp;Atsushi Watanabe,&nbsp;Naoko Morimoto,&nbsp;Kazuo Nadaoka","doi":"10.1002/lno.70088","DOIUrl":"10.1002/lno.70088","url":null,"abstract":"<p>Seagrasses thrive in shallow lagoons between land and fringing coral reefs, serving as a buffer that mitigates the propagation of environmental stressors from land to reefs. However, mass grazing by megaherbivores poses a significant threat to seagrass loss, impacting the sustainability of tropical coastal habitats. Despite the urgency of this issue, few studies have investigated the possible consequences of grazing on the mitigating functions of seagrass beds. To explore the roles of seagrass beds in sediment accumulation and stabilization and assess the effects of herbivory on these functions, we conducted sediment trap experiments in a coral reef lagoon to examine the impact of seagrasses on sediment mobility. Hydrodynamic forces governing sediment mobility were quantified using a customized reef-scale hydrodynamic model. The results indicated that sediment resuspension primarily driven by bottom shear stress was the primary factor influencing sediment mobility within the lagoon. Resuspension within healthy seagrass beds was generally low and exhibited minimal sensitivity to hydrodynamic forcing. Consequently, river-borne mineral soil particles predominantly remained confined within the nearshore seagrass zone due to the trapping and stabilizing effects of seagrasses. Since 2019, seagrasses have been severely depleted due to intensive grazing by sea turtles. Simultaneously, sediment resuspension has intensified, and its dependence on bottom shear stress has become evident. Our findings demonstrate that reef seagrass can effectively suppress sediment resuspension by capturing river-borne mineral soil. Furthermore, the loss of this function through mass grazing could potentially lead to sediment destabilization and erosion.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 7","pages":"1835-1848"},"PeriodicalIF":3.8,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144097311","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}