Limnology and Oceanography最新文献_第10页

Daily Sun-induced chlorophyll fluorescence vs. irradiance curves reflect the photoadaptation of phytoplankton in surface waters 每日太阳诱导的叶绿素荧光与辐照度曲线反映了表层浮游植物的光适应性

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-03-13 DOI: 10.1002/lno.70001

Yannick Huot, David Antoine, Vincenzo Vellucci

{"title":"Daily Sun-induced chlorophyll fluorescence vs. irradiance curves reflect the photoadaptation of phytoplankton in surface waters","authors":"Yannick Huot, David Antoine, Vincenzo Vellucci","doi":"10.1002/lno.70001","DOIUrl":"10.1002/lno.70001","url":null,"abstract":"Phytoplankton chlorophyll Sun-induced fluorescence is observable in the upwelling light field of the ocean. This allows its observation by radiometers in situ or on satellite sensors. Since it is influenced by both biomass and physiology it can potentially provide information about both. Since fluorescence yield is complementary to photosynthesis and heat in photosystem II, its observation throughout the day provides information on the response of phytoplankton to diel light cycles. Here we use a time series collected in the northwestern Mediterranean Sea (BOUSSOLE site) to extract photophysiological parameters of phytoplankton using the Sun-induced fluorescence and as well as with an active chlorophyll fluorometer. The daily resolved patterns are consistent with photoacclimation and photoadaptation processes and reflect seasonal variations of the mixed-layer average irradiance. We also show that fluorescence yields derived from satellite measurements (MODIS) at the same location are not correlated to these patterns, confirming the limited influence of photoacclimation and photoadaptation on the satellite-derived chlorophyll fluorescence yield near solar noon.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 4","pages":"1001-1015"},"PeriodicalIF":3.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618453","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

Responses of microbial communities and greenhouse gas production to land use change in mangrove wetland sediments 红树林湿地沉积物微生物群落和温室气体排放对土地利用变化的响应

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-03-13 DOI: 10.1002/lno.70028

Xianbiao Lin, Bingqian Zhu, Yongyi Peng, Genmei Lin, Dongyao Sun, Wangwang Ye

{"title":"Responses of microbial communities and greenhouse gas production to land use change in mangrove wetland sediments","authors":"Xianbiao Lin, Bingqian Zhu, Yongyi Peng, Genmei Lin, Dongyao Sun, Wangwang Ye","doi":"10.1002/lno.70028","DOIUrl":"10.1002/lno.70028","url":null,"abstract":"Tidal wetland reclamation is a worldwide issue that profoundly alters ecological functions and ecosystem service provisions; however, its impacts on sediment microbial communities and functions remain poorly understood. Here, we investigated the spatial and seasonal patterns of greenhouse gas (GHG) production in response to land use change in mangrove wetlands and elucidated the underlying mechanisms by integrating environmental parameters and microbial community characteristics. In the time period studied, land use change substantially reduced the sediment organic matter content, microbial community richness and diversity, and CO2 production rates. Converting mangroves to drier land cover types, namely orchard and vegetable field, significantly diminished reducing substrates (sulfide, Fe2+, and NH4+), microbial network complexity and stability, and CH4 production rates, while increasing N2O production rates. In contrast, these parameters showed the opposite trend following the conversion of mangroves to flooded aquaculture pond. Overall GHG production rate in mangrove wetlands was 399.8 mg CO2e kg−1 d−1, which respectively decreased by 68.83%, 69.86%, and 30.84% in orchard, vegetable field, and aquaculture pond. Microbial community richness and network complexity and stability were strongly related to the production rates of CH4 and N2O, rather than CO2, which can be better indicators of specialized functions (CH4 and N2O production). Therefore, preserving microbial “interaction” could be important to mitigate the negative effects of microbial community richness and diversity loss caused by human activities in aquatic environments. Future research should consider environmental conditions and microbial community diversity, composition, interactions, and activities to gain a comprehensive understanding of ecosystem functions.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 5","pages":"1210-1225"},"PeriodicalIF":3.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143618452","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

Autonomous observations enhance our ability to observe the biological carbon pump across diverse carbon export regimes 自主观察增强了我们在不同碳出口制度下观察生物碳泵的能力

IF 4.5 1区地球科学

Limnology and Oceanography Pub Date : 2025-03-12 DOI: 10.1002/lno.70002

Shawnee Traylor, David P. Nicholson, Samantha J. Clevenger, Ken O. Buesseler, Eric D'Asaro, Craig M. Lee

{"title":"Autonomous observations enhance our ability to observe the biological carbon pump across diverse carbon export regimes","authors":"Shawnee Traylor, David P. Nicholson, Samantha J. Clevenger, Ken O. Buesseler, Eric D'Asaro, Craig M. Lee","doi":"10.1002/lno.70002","DOIUrl":"https://doi.org/10.1002/lno.70002","url":null,"abstract":"The expansion of autonomous observation platforms offers vast opportunities for analyzing ocean ecosystems and their role in carbon export. As part of the EXport Processes in the Ocean from RemoTe Sensing campaign, we autonomously measured the productivity regimes in two contrasting end‐member ecosystem states. The first campaign occurred in the subpolar North Pacific near Ocean Station Papa (Site 1), characterized by iron limitation and a highly regenerative regime. The second captured a springtime bloom in the North Atlantic (Site 2), which typically drives efficient export of productivity. Using a combination of floats and gliders carrying biogeochemical sensors, we quantified gross primary productivity, net community production, and organic carbon export potential (fCorg) to assess biological carbon pump strength. Site 2 demonstrated higher cruise‐period productivity, with roughly 5× the gross primary productivity and 13× the euphotic zone net community production seen at Site 1. Greater export efficiency at Site 2 was reflected in numerous indices, such as the ratio of new production to net primary productivity (ef‐ratio; Site 1: 0.33; Site 2: 0.73), the ratio of sinking particulate organic carbon to net primary productivity (ez‐ratio; Site 1: 0.24; Site 2: 0.69), and mean daily fCorg (Site 1: 3.4 ± 0.7; Site 2: 20.3 ± 2.3 mmol C m−2 d−1). Together with particulate organic carbon flux derived from thorium‐234 measurements, we infer that observed low net community production was almost entirely routed to sinking particulate organic carbon at Site 1, while the much higher net community production at Site 2 resulted in near‐equal proportions routed to dissolved organic carbon production and sinking particulate organic carbon.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"11 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143607807","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

Relative phase between tidal and solar cycles influences the heating of a coral atoll lagoon 潮汐和太阳周期之间的相对相位影响珊瑚环礁泻湖的加热

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-03-07 DOI: 10.1002/lno.70013

Sarah Ruth Merrigan, Geno Pawlak, Gregory Sinnett, Ke-Hsien Fu, Kristen A. Davis

{"title":"Relative phase between tidal and solar cycles influences the heating of a coral atoll lagoon","authors":"Sarah Ruth Merrigan, Geno Pawlak, Gregory Sinnett, Ke-Hsien Fu, Kristen A. Davis","doi":"10.1002/lno.70013","DOIUrl":"10.1002/lno.70013","url":null,"abstract":"We seek to understand the physical processes driving a recent warming event in Dongsha Atoll lagoon, a coral atoll in the South China Sea. The system has experienced hypoxia-related fish kills and seagrass die-offs, further motivating our understanding of circulation and exchange within the lagoon. Hydrographic observations were collected in summer 2019 to examine circulation and ocean–lagoon exchange. A heat budget was constructed to investigate the relative influence of tides, wind, waves, surface heating, and advective ocean–lagoon exchange on the lagoon heat content. Volume fluxes also allow for the estimate of bulk lagoon flushing time, which is critical in driving water temperatures, biogeochemical cycles, and reef ecosystem functions. Over the 22-d study period, the lagoon warmed by 1.5°C, driven primarily by solar radiative heating. Surface heat fluxes were balanced by cooling from advective exchange through deeper channels and over the shallow reef flat surrounding the lagoon. Without these cooling flows, the lagoon would have heated by 4.5°C over the study period. Estimated flushing times for the Dongsha Atoll lagoon range from 4.6 to 6.1 d for spring and neap tide. A phase-locked interaction between the diurnal solar cycle and the diurnal tide drives advective cooling over the reef flat into the lagoon at night during the summer, especially during spring tide. These results highlight a unique mechanism shaping seasonal patterns in circulation and heat fluxes in a diurnal-tide-dominated reef system, which is likely important for other biogeochemical parameters and in shallow coastal ecosystems with similar tidal forcing.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 5","pages":"1181-1195"},"PeriodicalIF":3.8,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143589910","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

Molecular activity mediates the composition and assembly of dissolved organic matter in lake sediments 分子活动调节湖泊沉积物中溶解有机质的组成和聚集

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-03-07 DOI: 10.1002/lno.70015

Shuailong Wen, Ang Hu, Francisco Dini-Andreote, Lei Han, Shuyu Jiang, Kyoung-Soon Jang, Jianjun Wang

{"title":"Molecular activity mediates the composition and assembly of dissolved organic matter in lake sediments","authors":"Shuailong Wen, Ang Hu, Francisco Dini-Andreote, Lei Han, Shuyu Jiang, Kyoung-Soon Jang, Jianjun Wang","doi":"10.1002/lno.70015","DOIUrl":"10.1002/lno.70015","url":null,"abstract":"Lake sediments are hotspots for carbon transformation and burial, where the turnover of dissolved organic matter (DOM), influenced by molecular activity, regulates global carbon cycling. However, the composition of sediment DOM and how its assembly mechanisms are related to molecular activity remain poorly understood. Here, 63 freshwater sediments were collected from tropical to cold temperate climatic zones in China. We explored the molecular composition and assembly of sediment DOM and the underlying mechanisms driven by climate, physicochemical factors, and microbes along the gradient of molecular activity, indicated by the number of potential biochemical transformations in which a molecule is involved. Sediment DOM was dominated by lipid- (35%) and lignin-like compounds (33%), and the latter were enriched as the molecular activity of DOM increased. Besides, the DOM assemblage with higher potential biochemical transformations had greater compositional similarity across different climatic zones and tended to assemble deterministically. Specifically, as the average number of potential biochemical transformations of molecules increased from 0.4 to 14, the assembly of these molecules was structured by a shift from stochastic to deterministic processes, with the latter accounting for ≥ 75% thereafter. Overall, DOM assemblages were primarily structured by physicochemical factors, including sediment total organic carbon and electrical conductivity. As molecular activity increased, however, assemblages were increasingly affected by climate and bacterial communities, consistent with the enhanced complexity of bacterial–molecular networks. Collectively, our study highlights that the turnover of DOM regulated by biotic and abiotic factors is further constrained by the intrinsic molecular activity.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 5","pages":"1196-1209"},"PeriodicalIF":3.8,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599349","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

Global satellite observations of marine phytoplankton pigments over the past two decades 过去二十年海洋浮游植物色素的全球卫星观测

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-03-04 DOI: 10.1002/lno.70017

Deyong Sun, Yuhang Chen, Zhenghao Li, Shengqiang Wang, Peng Chen, Yu Huan

{"title":"Global satellite observations of marine phytoplankton pigments over the past two decades","authors":"Deyong Sun, Yuhang Chen, Zhenghao Li, Shengqiang Wang, Peng Chen, Yu Huan","doi":"10.1002/lno.70017","DOIUrl":"10.1002/lno.70017","url":null,"abstract":"Documenting the variations of phytoplankton pigments is essential for understanding phytoplankton assemblages' dynamics and physiological characteristics in the global oceans. Advanced chlorophyll a satellite product has provided an overview of global phytoplankton biomass, yet deeper taxonomic biomass monitoring demands more detailed pigment information. In this study, we have collected 1562 in situ measured sea surface samples (depth < 10 m) from 1997 to 2017 covering the global ocean, where the in situ dataset consists of pigment concentration and phytoplankton absorption coefficient (aph). A global semi-analytical pigment model was developed using the Gaussian decomposition method and was evaluated by the leave-one-out cross validation method. Model accuracy verification based on in situ measurement (e.g., mean absolute percentage errors below ~ 67% for most pigments) and satellite synchronization dataset (e.g., most pigments have mean absolute percentage errors below ~ 70%) showed the reliable performance of the pigment model in the global oceans. We reconstructed the global hyperspectral phytoplankton absorption by the three-component absorption model of the phytoplankton size class, enabling satellite application of the pigment model and obtaining the nearly 20-yr spatiotemporal variations of 14 phytoplankton pigments. Global pigment concentrations exhibited a generally relatively unchanging pattern at the beginning of the 21st century, as evidenced by stable geographic distribution and temporal trends, while local environmental disturbances created anomalies in 1-yr period. Our findings provide an effective model to detect global pigment concentration and essential satellite products for further analysis of phytoplankton assemblages.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 5","pages":"1167-1180"},"PeriodicalIF":3.8,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608179","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

Macroalgae detritus decomposition and cross-shelf carbon export from shallow and deep reefs 大型藻类碎屑分解和浅海和深海珊瑚礁的跨大陆架碳输出

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-03-03 DOI: 10.1002/lno.70006

Taylor Simpkins, Mirjam Van Der Mheen, Morten F. Pedersen, Albert Pessarrodona, Chari Pattiaratchi, Thomas Wernberg, Karen Filbee-Dexter

{"title":"Macroalgae detritus decomposition and cross-shelf carbon export from shallow and deep reefs","authors":"Taylor Simpkins, Mirjam Van Der Mheen, Morten F. Pedersen, Albert Pessarrodona, Chari Pattiaratchi, Thomas Wernberg, Karen Filbee-Dexter","doi":"10.1002/lno.70006","DOIUrl":"10.1002/lno.70006","url":null,"abstract":"Macroalgal forests have been suggested to export substantial amounts of carbon to deep ocean sinks and could account for 27–34% of annual blue carbon sequestered in Australia. However, a major knowledge gap concerns how carbon in the detrital tissue of the dominant seaweed species is remineralized as it is exported offshore. We quantified decomposition and carbon content in detrital tissue of dominant canopy-forming seaweeds Ecklonia radiata and Scytothalia dorycarpa at three depths (10, 20, and 50 m) in a 50 d in situ litterbag experiment in Western Australia. We then combined these rates with a particle tracking model to estimate the potential export of macroalgae detritus from our experiment sites into deeper waters. Decomposition of particulate organic carbon was fast relative to other cooler regions globally, and there were no significant differences between species and most depths. One-half of the detritus was remineralized within 12 (± 2) days for E. radiata and 8 (± 2) days for S. dorycarpa, with ~ 8% remaining for both species after 50 d in situ. Based on simulated transport times and decomposition, 10% and 11% of the E. radiata and S. dorycarpa detritus from shallow reefs (10–20 m) were exported beyond the shelf break (≥ 200 m) whereas 47% and 37% were exported from deep reefs (50 m). These estimates highlight the variable but substantial carbon sequestration potential across the coastal zone.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 4","pages":"1046-1058"},"PeriodicalIF":3.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599353","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

Multi-trait responses in two marine diatoms to pH and irradiance reveal interactive effect of light and acidification, mediated by silicification 两种海洋硅藻对pH和辐照度的多性状响应揭示了由硅化介导的光和酸化的相互作用

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-03-03 DOI: 10.1002/lno.70014

Billy FitzGerald-Lowry, Daniel Aagren Nielsen, Rebecca Julianne Duncan, Alyson May Theseira, Georgia Thompson, Katherina Petrou

{"title":"Multi-trait responses in two marine diatoms to pH and irradiance reveal interactive effect of light and acidification, mediated by silicification","authors":"Billy FitzGerald-Lowry, Daniel Aagren Nielsen, Rebecca Julianne Duncan, Alyson May Theseira, Georgia Thompson, Katherina Petrou","doi":"10.1002/lno.70014","DOIUrl":"10.1002/lno.70014","url":null,"abstract":"Ocean ecosystem shifts in response to anthropogenic climate change are impacting marine organisms, including phytoplankton. Ocean acidification and warming represent two key threats to marine phytoplankton, causing significant changes to the upper mixed layer of the ocean, reshuffling their distribution, and reorganizing their physiology and metabolism. In this study, we investigated changes in biomolecular composition and silicification rates of the two “model” diatom species Phaeodactylum tricornutum and Thalassiosira weissflogii under low (~ 350) and projected future (~ 800) pCO2 concentrations with low (20 μmol photons m−2 s−1) and high (200 μmol photons m−2 s−1) light, simulating expected climate change-induced impacts of ocean shoaling and acidification. Specifically, our study conditions elicited changes in lipid and protein content in both species. We also found a negative effect of pCO2 on silica production under high light in T. weissflogii that was linked to improved photochemical efficiency. This interactive effect between light and pCO2 with silica production suggests a potential controlling role of the frustule in diatom photosynthesis and photoprotection (energy balance). Based on these data, ocean shoaling and acidification have the potential to influence the nutritional value and biogeochemical role of diatoms through its effect on diatom frustule synthesis and photobiology.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 5","pages":"1137-1151"},"PeriodicalIF":3.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599352","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

Predicting river ecosystem metabolism across large environmental gradients: Drivers and temporal dependencies in the Iberian Peninsula 预测跨越大环境梯度的河流生态系统新陈代谢：伊比利亚半岛的驱动因素和时间依赖性

IF 3.8 1区地球科学

Limnology and Oceanography Pub Date : 2025-03-03 DOI: 10.1002/lno.70019

Amaia A. Rodeles, Francisco J. Peñas, Maite Arroita, José Barquín

{"title":"Predicting river ecosystem metabolism across large environmental gradients: Drivers and temporal dependencies in the Iberian Peninsula","authors":"Amaia A. Rodeles, Francisco J. Peñas, Maite Arroita, José Barquín","doi":"10.1002/lno.70019","DOIUrl":"10.1002/lno.70019","url":null,"abstract":"River ecosystem metabolism plays a significant role in the global carbon cycle. However, the limited spatial or temporal scale of most river metabolism studies hinders our ability to draw general patterns, identify common drivers, and make reliable global predictions. We developed Random Forest models for predicting daily metabolism rates using a large database of more than 100 river reaches across the Iberian Peninsula covering a large environmental gradient. As potential drivers, we included static variables (e.g., catchment area, distance to the sea), anthropogenic factors (e.g., land uses), and short-term dynamic variables (e.g., light, water temperature, discharge) averaged over different periods (from 0 to 40 d) to explore the role of shorter vs. longer-term environmental control on daily river metabolism rates. Both daily gross primary production and ecosystem respiration rates responded more strongly to average environmental conditions over the previous 40 d than to daily values. The 40-d average random forest models explained up to 77% of gross primary production and 82% of ecosystem respiration variance. The most important drivers of GPP were stage (depth), distance to the sea, and light, while the main predictors of ER were stage and GPP. Dynamic variables were generally the most important drivers of daily metabolic rates, although static ones such as distance to the sea also played a role. Our results indicate that temporal patterns in river metabolism are influenced by a combination of environmental conditions integrated over several weeks, seasonal timing, and to a lesser extent, topology.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 5","pages":"1152-1166"},"PeriodicalIF":3.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599551","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

Heatwave intensity drives eco‐physiological responses in infaunal bivalves: A mesocosm experiment 热浪强度驱动水生双壳类动物的生态生理反应：一个中生态实验

IF 4.5 1区地球科学

Limnology and Oceanography Pub Date : 2025-03-03 DOI: 10.1002/lno.70012

Maren A. Staniek, Christian Pansch, Lisa N. S. Shama, Knut Mehler, Anna Steinmann, Jack J. Middelburg, Lukas Meysick

{"title":"Heatwave intensity drives eco‐physiological responses in infaunal bivalves: A mesocosm experiment","authors":"Maren A. Staniek, Christian Pansch, Lisa N. S. Shama, Knut Mehler, Anna Steinmann, Jack J. Middelburg, Lukas Meysick","doi":"10.1002/lno.70012","DOIUrl":"https://doi.org/10.1002/lno.70012","url":null,"abstract":"Marine heatwaves are increasing globally in intensity and duration. To investigate the potential consequences for coastal ecosystems, the effects of short‐term heat stress must be better understood. This study examined eco‐physiological responses in two common intertidal bivalves, Cerastoderma edule and Macoma balthica, to different heatwave intensities in a mesocosm experiment under near‐natural environmental conditions. Single‐species assemblages were exposed to a 15‐d heatwave of either +2.8°C (mild heatwave) or +4.4°C (strong heatwave) above ambient temperatures. Survival and condition were monitored, and filtration rates were measured before and during heatwave exposure to investigate feeding behavior. Bivalve respiration rates were measured before, during, and after heatwave exposure as a proxy for metabolic responses. For C. edule, we found significantly elevated filtration rates during the mild but not the strong heatwave. For M. balthica, survival was similar across treatments, but marine heatwaves had a significant effect on the condition index (tissue/shell mass ratio). During heatwave exposure, respiration rates were similar across treatments for both species. However, following the heatwaves, bivalves previously exposed to a strong heatwave showed lower respiration rates compared to those exposed to an ambient or a mild heatwave. This study revealed that short‐term heatwaves can have persisting negative effects on bivalve metabolism and that the two species responded differently to the heatwave intensities. Further research is needed on the potential long‐term effects of marine heatwaves on intertidal fauna and their capacity to continue providing crucial ecosystem services.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"84 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143532715","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