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Spatiotemporal variation and generation mechanism of wave nonlinearity across salt marsh vegetation 盐沼植被波浪非线性时空变化及产生机制
IF 3.7 1区 地球科学
Limnology and Oceanography Pub Date : 2025-08-07 DOI: 10.1002/lno.70168
Ying Zhao, Zhong Peng, Qinghua Ye, Yuan Xu, Haisheng Yu, Liangzhi Chen, Zhengbing Wang, Qing He
{"title":"Spatiotemporal variation and generation mechanism of wave nonlinearity across salt marsh vegetation","authors":"Ying Zhao,&nbsp;Zhong Peng,&nbsp;Qinghua Ye,&nbsp;Yuan Xu,&nbsp;Haisheng Yu,&nbsp;Liangzhi Chen,&nbsp;Zhengbing Wang,&nbsp;Qing He","doi":"10.1002/lno.70168","DOIUrl":"10.1002/lno.70168","url":null,"abstract":"<p>Wave nonlinearity plays a critical role in modulating energy dissipation and sediment transport in vegetated coastal zones, influencing shoreline stability and ecosystem-based defenses. This study analyzes 45 d of wave observations from the Yangtze Estuary, including data collected during Typhoon Khanun, to investigate its spatial variability and underlying mechanisms of wave nonlinearity across a mudflat–vegetation transect. Wave skewness and asymmetry varied within tidal cycles, increasing at low tide and decreasing at high tide. During typhoon conditions, nonlinearity intensified significantly, with skewness increasing by up to 346% and asymmetry shifting toward more forward-leaning waveforms, both closely linked to elevated Ursell numbers. Bispectral analysis at five stations across the transect revealed distinct energy transfer mechanisms: sum interactions dominated over mudflats, whereas difference interactions prevailed within vegetated zones, indicating vegetation-induced modification of nonlinear wave dynamics. Further analysis shows that shoaling and vegetation exerted opposing influences, amplifying and damping wave nonlinearity, respectively. Empirical formulas proposed by Zhao et al. (<i>Coastal Engineering</i> 2024; 192:104543) from laboratory data were evaluated against the field data, demonstrating reasonable performance under extreme conditions. These findings improve mechanistic understanding of wave–vegetation interactions and support the development of nature-based strategies for coastal resilience and sediment management.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 9","pages":"2660-2672"},"PeriodicalIF":3.7,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145101025","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
The influence of mountain streamflow on nearshore ecosystem metabolism in a large, oligotrophic lake across a drought and a wet year 旱涝年山地径流对大型寡营养湖泊近岸生态系统代谢的影响
IF 3.7 1区 地球科学
Limnology and Oceanography Pub Date : 2025-08-06 DOI: 10.1002/lno.70157
Kelly Loria, Heili Lowman, Jasmine Krause, Leon Katona, Ramon Naranjo, Facundo Scordo, Adrian Harpold, Sudeep Chandra, Joanna R. Blaszczak
{"title":"The influence of mountain streamflow on nearshore ecosystem metabolism in a large, oligotrophic lake across a drought and a wet year","authors":"Kelly Loria,&nbsp;Heili Lowman,&nbsp;Jasmine Krause,&nbsp;Leon Katona,&nbsp;Ramon Naranjo,&nbsp;Facundo Scordo,&nbsp;Adrian Harpold,&nbsp;Sudeep Chandra,&nbsp;Joanna R. Blaszczak","doi":"10.1002/lno.70157","DOIUrl":"10.1002/lno.70157","url":null,"abstract":"<p>The influence of streamflow can be highly heterogeneous around lake edges, making it challenging to predict how benthic productivity in the littoral zone responds to hydroclimatic change. The degree to which streamflow affects nearshore productivity varies as a function of catchment characteristics, internal lake morphometry, and processes. This study investigates the relative influence of streamflow on nearshore metabolism (e.g., gross primary productivity [GPP], ecosystem respiration [ER], and net ecosystem productivity [NEP]) for shores with large, small, or no stream inflows (four locations across two shores) during two contrasting water years (one drought and one wet) in Lake Tahoe (Nevada/California, USA). Using Bayesian structural equation modeling, we found streamflow decreased water temperature, benthic light, and GPP across both years. Compared to the drought year, the subsequent wet year had 54% higher annual streamflow, 37% less light, and lower NEP at locations with large or small inflows (39% Δ −0.32 mmol O₂ m<sup>−3</sup> d<sup>−1%</sup> and 49% Δ −1.19 mmol O₂ m<sup>−3</sup> d<sup>−1</sup>, respectively). During the wet year, we observed a 68% increase in the negative association between streamflow and nearshore GPP at the large inflow and a 62% decrease in the positive association between streamflow and GPP at the small inflow. This work demonstrates how oligotrophic littoral productivity varies across shorelines and in response to hydrological conditions, with streamflow and precipitation exerting contrasting effects depending on the proximity to inflowing streams. Our results suggest future lake responses to climate volatility depend on spatial and temporal hydrologic connectivity to catchments and upland processes.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 9","pages":"2645-2659"},"PeriodicalIF":3.7,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144792274","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
Varying vulnerabilities: Seagrass species under threat from prolonged ocean warming 不同的脆弱性:海草物种受到长期海洋变暖的威胁
IF 4.5 1区 地球科学
Limnology and Oceanography Pub Date : 2025-08-06 DOI: 10.1002/lno.70156
Marnie L. Campbell, Chi T. U. Le
{"title":"Varying vulnerabilities: Seagrass species under threat from prolonged ocean warming","authors":"Marnie L. Campbell, Chi T. U. Le","doi":"10.1002/lno.70156","DOIUrl":"https://doi.org/10.1002/lno.70156","url":null,"abstract":"Understanding the response of various seagrass species to prolonged elevated water temperatures is crucial for effective management and seagrass species restoration amid increasing climate change‐induced ocean warming and marine heat waves. This is especially important in intertidal seagrass meadows, where heat can penetrate substrate depths of up to 50 cm. We assessed and contrasted the responses of five intertidal species—<jats:italic>Zostera muelleri</jats:italic> Irmisch ex Asch, <jats:italic>Halophila ovalis</jats:italic> (R.Br.) Hook f., <jats:italic>Halodule uninervis</jats:italic> (Forssk.) Asch, <jats:italic>Halophila decipiens</jats:italic> Ostenf., and <jats:italic>Halophila spinulosa</jats:italic> (R.Br.) Asch—over a month of elevated temperatures by examining rhizome growth, number of living shoots, root development, and sprig survival. While all the species appeared to negatively respond to elevated water temperatures, our results indicate notable interspecific variations in their reactions to prolonged warming stress. Two <jats:italic>Halophila</jats:italic> species, including <jats:italic>H. ovalis</jats:italic> and <jats:italic>H. spinulosa</jats:italic>, are sensitive to prolonged heat stress exceeding 10°C above ambient. <jats:italic>Halodule uninervis</jats:italic> is the most tolerant of elevated water temperature, followed by <jats:italic>Zostera muelleri,</jats:italic> although the latter is still negatively affected. Intertidal <jats:italic>H. decipiens</jats:italic> appears to be highly vulnerable to disturbance and performs poorly in mesocosm settings. This study offers an initial understanding of how climate change might impact these seagrass species, whose ecological functions are not easily replaceable once lost.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"34 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144792249","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
Effects of increasing hydrostatic pressures on marine microbial enzymatic activities 增加静水压力对海洋微生物酶活性的影响
IF 3.7 1区 地球科学
Limnology and Oceanography Pub Date : 2025-08-05 DOI: 10.1002/lno.70164
John Paul Balmonte, Carol Arnosti, Douglas H. Bartlett, Stephanie Caddell, Ronnie N. Glud
{"title":"Effects of increasing hydrostatic pressures on marine microbial enzymatic activities","authors":"John Paul Balmonte,&nbsp;Carol Arnosti,&nbsp;Douglas H. Bartlett,&nbsp;Stephanie Caddell,&nbsp;Ronnie N. Glud","doi":"10.1002/lno.70164","DOIUrl":"10.1002/lno.70164","url":null,"abstract":"<p>High hydrostatic pressure is characteristic of the deep ocean and is presumed to influence microbial functions and viability. However, marine microbial processes are typically measured only at atmospheric pressure (0.1 MPa), limiting our understanding of pressure effects on the activities of microbes that sink as part of the biological carbon pump, as well as those that reside in the deep ocean. To test pressure effects on microbial functions, we measured extracellular enzymatic activities—the first step in organic matter remineralization—of a moderate piezophile (<i>Photobacterium profundum</i> SS9), as well as of microbial communities in waters and sediments from shallow to abyssal (5500 m) depths and their cell-free enzymes (&lt; 0.2 <i>μ</i>m). Activities were measured at 0.1–100 MPa to assess the pressure effects across the nearly full range of oceanic depths. <i>Photobacterium profundum</i> SS9 enzymes show varying pressure effects, from considerable stimulation at optimal pressure (28 MPa) to near complete inhibition (100 MPa). Pressure effects were measured for diverse protein- and carbohydrate-degrading and phosphorus-acquiring enzymes among pelagic and benthic microbial communities. The most common pressure effect was partial activity inhibition, indicating a dampening of the initial step of carbon remineralization at increasing pressures. However, the retention of cell-free enzymatic activities at higher pressures was occasionally observed even for enzymes from surface-originating assemblages, indicating functionality down to hadal depths and their potential for piezotolerance. These variable pressure effects must be considered when quantifying degradation rates of sinking and deposited particulate matter at increasing pressures in the deep ocean.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 9","pages":"2632-2644"},"PeriodicalIF":3.7,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://aslopubs.onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70164","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144778486","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
Wildfire ash inhibits the growth and photosynthetic efficiency of marine phytoplankton 野火灰烬抑制海洋浮游植物的生长和光合效率
IF 3.7 1区 地球科学
Limnology and Oceanography Pub Date : 2025-08-02 DOI: 10.1002/lno.70161
Kyle S. Van Houtan, John Lambert, Anthony A. Provatas, Dillon J. Van Houtan, Celia M. Smith
{"title":"Wildfire ash inhibits the growth and photosynthetic efficiency of marine phytoplankton","authors":"Kyle S. Van Houtan,&nbsp;John Lambert,&nbsp;Anthony A. Provatas,&nbsp;Dillon J. Van Houtan,&nbsp;Celia M. Smith","doi":"10.1002/lno.70161","DOIUrl":"10.1002/lno.70161","url":null,"abstract":"<p>While the ecological effects of wildfires have been documented in terrestrial and aquatic environments, impacts on coastal and ocean ecosystems are largely unexplored. Here, we describe the physical and chemical properties of ash from the CZU Lightning Complex fire (California, USA) and assess its experimental impacts on unicellular marine phytoplankton, using model monocultures. Air-fall ash samples were primarily composed of particles 250–500 <i>μ</i>m and contained ~ 1‰ of Fe, Mn, and Ba. Diagnostic indices indicated the air-fall ash originated from combusted wood, and the total concentration of the EPA 16 high-priority polycyclic aromatic hydrocarbons approached 3 ppm. Pulse Amplitude Modulation fluorometry documented 0%–18% reductions in photosynthetic efficiency of <i>Isochrysis</i> and <i>Dunaliella</i> cultures dosed with ash, and culture extracts showed 20%–84% declines in bulk cellular growth. While our study demonstrated the impacts of wildfire ash on marine producers, the precise physiological mechanisms are unclear, and we make several recommendations for future studies.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 9","pages":"2745-2755"},"PeriodicalIF":3.7,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763391","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
Ascidians increase in abundance on tropicalized reefs and may enhance benthic nitrous oxide production 海鞘在热带珊瑚礁上的丰度增加,可能会增加底栖一氧化二氮的产生
IF 3.7 1区 地球科学
Limnology and Oceanography Pub Date : 2025-08-02 DOI: 10.1002/lno.70154
Zuhairah Dindar, Dirk V. Erler, Stephanie G. Gardner, Hamish A. Malcolm, Michael Sutherland, Adriana Vergés
{"title":"Ascidians increase in abundance on tropicalized reefs and may enhance benthic nitrous oxide production","authors":"Zuhairah Dindar,&nbsp;Dirk V. Erler,&nbsp;Stephanie G. Gardner,&nbsp;Hamish A. Malcolm,&nbsp;Michael Sutherland,&nbsp;Adriana Vergés","doi":"10.1002/lno.70154","DOIUrl":"10.1002/lno.70154","url":null,"abstract":"<p>Nitrous oxide (N<sub>2</sub>O) is an ozone-depleting greenhouse gas that has a global warming potential nearly 300 times greater than carbon dioxide. Although the oceans contribute about 21% of atmospheric global N<sub>2</sub>O emissions, we know relatively little about N<sub>2</sub>O dynamics in nearshore systems. Here, we document the fourfold increase in the abundance of a large N<sub>2</sub>O-producing invertebrate (<i>Herdmania grandis</i>) over two decades in eastern Australia. This increase occurred in warming subtropical reefs that were previously dominated by carbon-capturing kelp but have since become tropicalized as warm-affinity species expand their ranges poleward. Temperature manipulation experiments demonstrated that <i>Herdmania</i> produces higher levels of N<sub>2</sub>O under current summer conditions (25°C) compared to winter (18°C). However, further warming to 28°C resulted in intermediate N<sub>2</sub>O production rates, which did not differ significantly from either summer or winter values, indicating that a threshold for temperature-driven N<sub>2</sub>O production may have been reached. By integrating N<sub>2</sub>O production rates with <i>Herdmania</i> field density data and coastal bathymetry, we estimate that subtropical reefs may already be producing more N<sub>2</sub>O than adjacent estuaries. Our findings suggest that warming reefs, transitioning from carbon-capturing kelp forests to N<sub>2</sub>O-producing ascidian-dominated reefs, could significantly alter coastal greenhouse gas budgets.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 9","pages":"2618-2631"},"PeriodicalIF":3.7,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://aslopubs.onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763392","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
Plankton do not care: Minimal effects of ocean liming on plankton growth and grazing in the Eastern Mediterranean 浮游生物不在乎:海洋石灰化对东地中海浮游生物生长和放牧的最小影响
IF 4.5 1区 地球科学
Limnology and Oceanography Pub Date : 2025-08-02 DOI: 10.1002/lno.70136
Claudia Traboni, Ariadna C. Nocera, Filomena Romano, Justine Courboulès, Christos Chantzaras, Iordanis Magiopoulos, Selene Varliero, Daniela Basso, Paraskevi Pitta
{"title":"Plankton do not care: Minimal effects of ocean liming on plankton growth and grazing in the Eastern Mediterranean","authors":"Claudia Traboni, Ariadna C. Nocera, Filomena Romano, Justine Courboulès, Christos Chantzaras, Iordanis Magiopoulos, Selene Varliero, Daniela Basso, Paraskevi Pitta","doi":"10.1002/lno.70136","DOIUrl":"https://doi.org/10.1002/lno.70136","url":null,"abstract":"Increasing CO<jats:sub>2</jats:sub> emissions have led to the development of CO<jats:sub>2</jats:sub> removal strategies to counteract ocean acidification. Among these, ocean alkalinity enhancement techniques, particularly ocean liming, may represent a promising approach to restore seawater pH and boost CO<jats:sub>2</jats:sub> sequestration. Yet, the impact of liming on plankton communities remains underexplored. In the framework of a mesocosm experiment, we conducted three dilution incubations to assess natural plankton response (abundance, composition, growth, grazing, diet, and food selectivity) to liming, achieved with calcium hydroxide (Ca(OH)<jats:sub>2</jats:sub>) additions. Experiments included two liming treatments (low concentration, and high concentration) and a control treatment without Ca(OH)<jats:sub>2</jats:sub>. The community was dominated by small‐sized plankton (bacteria, <jats:italic>Synechococcus</jats:italic> and pigmented picoflagellates), outnumbering larger diatoms, dinoflagellates, and ciliates. While chlorophyll <jats:italic>a</jats:italic>, heterotrophic bacteria, and pigmented picoflagellates remained stable across treatments, the abundance of <jats:italic>Synechococcus</jats:italic> and dinoflagellates increased, whereas diatoms and ciliates declined particularly under high Ca(OH)<jats:sub>2</jats:sub>. Growth and grazing rates were largely unaffected by alkalinity, except for increased growth in pigmented picoflagellates upon liming. Microzooplankton showed low ingestion of <jats:italic>Synechococcus</jats:italic> and pigmented picoflagellates and higher intake of diatoms, dinoflagellates, and ciliates. Food selectivity was unresponsive to liming, as the grazers selected prey based on size, regardless of Ca(OH)<jats:sub>2</jats:sub> concentrations. Increased alkalinity and pH, and the parallel effect of trophic cascades might have driven nutrient fluctuations and shaped downstream trophic interactions. Despite positive responses highlighted in this study, further research is needed to explore liming potentiality on a wider range of food‐web components and larger scales in the framework of ocean alkalinity enhancement research.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"15 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763394","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
Impact of nutritional history, prey quality, and quantity on grazing and photophysiological responses in the mixoplanktonic dinoflagellate Karenia brevis 营养史、猎物质量和数量对混合浮游甲藻短卡雷氏菌放牧和光生理反应的影响
IF 3.7 1区 地球科学
Limnology and Oceanography Pub Date : 2025-07-30 DOI: 10.1002/lno.70158
So Hyun Ahn, Xavier Mayali, Peter K. Weber, Patricia M. Glibert
{"title":"Impact of nutritional history, prey quality, and quantity on grazing and photophysiological responses in the mixoplanktonic dinoflagellate Karenia brevis","authors":"So Hyun Ahn,&nbsp;Xavier Mayali,&nbsp;Peter K. Weber,&nbsp;Patricia M. Glibert","doi":"10.1002/lno.70158","DOIUrl":"10.1002/lno.70158","url":null,"abstract":"<p>The mixotrophic toxic dinoflagellate <i>Karenia brevis</i> forms red tides almost annually along Florida's Gulf coast. We hypothesize that the nutritional status and abundance of its prey, the picocyanobacterium <i>Synechococcus</i>, will affect its feeding rates and growth responses, with implications for bloom dynamics. This study investigated how prey nutritional quality and quantity (absolute and relative) impact grazing rates by <i>K. brevis</i> initially exponentially growing and in nitrogen (N)-limited conditions, and how grazing, in turn, affects the photophysiological responses of predator and prey. Prey quality was manipulated by providing <i>Synechococcus</i> grown under different ratios of N : phosphorus (P). <i>Synechococcus</i> quality did not significantly affect ingestion rates (measured as prey death rate) but grazing rates increased with increasing prey : grazer ratios (<i>R</i><sup>2</sup> = 0.7). Compared to control, the growth of exponentially growing grazers doubled when <i>Synechococcus</i> was provided, whereas there was no growth enhancement when <i>Synechococcus</i> of varying qualities was provided to N-limited, chemostat-seeded grazers. Despite this doubled growth, <sup>15</sup>N labeling of the prey and nanoscale secondary ion mass spectrometry (nanoSIMS) detected low <i>Synechococcus</i>-N transfer into grazer biomass after 3 d (&lt; 1% on a cell basis). This suggests the potential of grazers benefiting from alternative N sources (e.g., microbiome-N) or other constituents (e.g., vitamins or metals) not measured in this study. Prey photosynthetic efficiency declined under grazing conditions, demonstrating that grazers can directly affect prey abundance through grazing and indirectly affect prey photophysiology, potentially via allelopathy, supporting previous findings of an inverse relationship between grazers and prey along the Florida Gulf Coast.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 9","pages":"2603-2617"},"PeriodicalIF":3.7,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://aslopubs.onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70158","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144747365","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
Inhibition of cosmopolitan toxic diatom, Pseudo-nitzschia, by seaweeds 海藻对世界性有毒硅藻伪尼茨菌的抑制作用
IF 3.7 1区 地球科学
Limnology and Oceanography Pub Date : 2025-07-29 DOI: 10.1002/lno.70127
Laine H. Sylvers, Christopher J. Gobler
{"title":"Inhibition of cosmopolitan toxic diatom, Pseudo-nitzschia, by seaweeds","authors":"Laine H. Sylvers,&nbsp;Christopher J. Gobler","doi":"10.1002/lno.70127","DOIUrl":"10.1002/lno.70127","url":null,"abstract":"<p><i>Pseudo-nitzschia</i> is a genus of harmful algal bloom (HAB)-forming diatoms that can produce domoic acid (DA), a compound known to cause death and disease in marine wildlife as well as amnesic shellfish poisoning in humans. Here, we show the effects of multiple cultivable seaweeds—<i>Saccharina latissima</i> (sugar kelp), <i>Ulva</i> spp., and <i>Gracilaria</i> spp.—on multiple toxic species of <i>Pseudo-nitzschia</i>. Co-culture growth assays of <i>Pseudo-nitzschia multiseries</i> and <i>Pseudo-nitzschia australis</i> together with environmentally realistic concentrations of each seaweed showed that all seaweeds except for <i>Gracilaria</i> caused significant reduction in <i>Pseudo-nitzschia</i> cell density relative to control treatments of 13%–47% in 24-to-48 h and up to 74%–94% reduction at 72 h and later (<i>p</i> &lt; 0.05 for all assays). In almost all experiments, <i>Pseudo-nitzschia</i> spp. in control treatments displayed exponential growth whereas populations in seaweed treatments did not. Bottle incubations of field-collected bloom populations of <i>Pseudo-nitzschia</i> spp. containing different <i>Pseudo-nitzschia</i> species assemblies with aquaculture realistic concentrations of <i>S. latissima</i> led to a significant reduction in <i>Pseudo-nitzschia</i> spp. cell density of 69%–81% by <i>S. latissima</i> at 2 g L<sup>−1</sup> (<i>p</i> &lt; 0.05 for all assays). In toxin accumulation experiments, <i>S. latissima</i> significantly lessened (<i>p</i> &lt; 0.05) DA accumulation in blue mussels (<i>Mytilus edilus</i>) and razor clams (<i>Ensis leei</i>). Collectively, these results suggest that the integration of seaweeds (particularly <i>S. latissima</i>) with shellfish aquaculture should be considered as a non-invasive and potentially profit-generating measure to mitigate the damage to that industry caused by the growing threat of <i>Pseudo-nitzschia</i> blooms.</p>","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 9","pages":"2591-2602"},"PeriodicalIF":3.7,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://aslopubs.onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766099","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
Issue Information & TOC 发行信息和TOC
IF 3.7 1区 地球科学
Limnology and Oceanography Pub Date : 2025-07-29 DOI: 10.1002/lno.70148
{"title":"Issue Information & TOC","authors":"","doi":"10.1002/lno.70148","DOIUrl":"10.1002/lno.70148","url":null,"abstract":"","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 S1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70148","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725379","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
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