Limnology and Oceanography Letters最新文献

{"title":"Gas transfer velocity (k600$$ {k}_{600} $$) increases with discharge in steep streams but not in low‐slope streams","authors":"Kelly S. Aho, Kaelin M. Cawley, Robert O. Hall, Robert T. Hensley, Walter K. Dodds, Nicolas Harrison, Keli J. Goodman","doi":"10.1002/lol2.70003","DOIUrl":"https://doi.org/10.1002/lol2.70003","url":null,"abstract":"Gas transfer velocity () controls gas fluxes between aquatic ecosystems and the atmosphere. In streams, is controlled by turbulence and, thus, local hydrology and geomorphology. Resultantly, variability in can be large and modeling from physical parameters can have large uncertainty. Here, we leverage a large dataset of estimates derived from tracer‐gas experiments in 22 US streams across a range of discharges. Our analysis shows that was highly variable both spatially across and temporally within streams, with estimates of spanning three orders of magnitude. Overall, scaled with discharge in steep streams due to relatively high stream power, but not in low‐slope streams, where stream power was relatively low even at high flows. Understanding how responds to stream discharge in a wide variety of streams is key to creating temporally and spatially resolved estimates of biogeochemical processes in streams.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"68 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143608487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Forecasting climate and human alterations to coastal and estuarine dissolved organic matter","authors":"Liz D. Ortiz Muñoz, John S. Kominoski","doi":"10.1002/lol2.70002","DOIUrl":"https://doi.org/10.1002/lol2.70002","url":null,"abstract":"River networks serve as conduits for dissolved organic matter (DOM) and carbon (DOC) from inland to coastal waters. Human activities and climate change are altering DOM sources, causing hydrological and biogeochemical shifts that impact DOC concentrations and changing the transport and transformation of DOM and DOC. Here, we synthesize current knowledge of changing DOM sources, DOC concentrations, and the associated hydrological and biogeochemical changes during transport along inland‐to‐coastal gradients, focusing on impacts to coastal and estuarine DOM and DOC. We project that continued land‐use changes, hydrological management, and sea‐level rise will result in more microbial and labile DOM, higher DOC concentrations, and an overall decoupling of DOC quantity and DOM quality. Understanding how these changes vary among river networks is essential to forecast coastal and estuarine water quality, ecosystem health, and global carbon cycling.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"128 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143599285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anthropogenic nutrient inputs affect productivity–biodiversity relationships in marine tintinnid assemblages","authors":"Meiping Feng,&nbsp;Jichen Qiu,&nbsp;Wenhua Bian,&nbsp;Yunfan Zhang,&nbsp;Siting Hu,&nbsp;Yijia Yang,&nbsp;Kailin Liu,&nbsp;Chaofeng Wang,&nbsp;Wuchang Zhang,&nbsp;Xiaoxia Sun,&nbsp;Na Li,&nbsp;Jun Lin,&nbsp;Shujin Guo,&nbsp;Bingzhang Chen","doi":"10.1002/lol2.70001","DOIUrl":"10.1002/lol2.70001","url":null,"abstract":"<p>Although the productivity–biodiversity relationship (PBR) has been a hot topic, few studies have considered how anthropogenic pressures affect PBRs in marine microzooplankton. Here, we provide the first insights into PBRs in tintinnid assemblages using 18-yr data from Jiaozhou Bay, a typical coastal bay in the Yellow Sea. We hypothesized and verified that PBRs vary across contrasting anthropogenic nutrient inputs and that functional and phylogenetic diversity would deliver more information than conventional species richness. High productivity promotes more diversity under low to medium rather than high anthropogenic nutrient inputs. Compared to species richness, functional and phylogenetic diversity reveal more PBR patterns and respond more quickly in response to varying anthropogenic inputs. A concave+ PBR is revealed for functional diversity in the ecozone with highly active water exchange. Our study contributes to the understanding of PBR in marine unicellular secondary producers and their responses to anthropogenic nutrient inputs in coastal ecosystems.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 2","pages":"234-244"},"PeriodicalIF":5.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143451861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Reconstructing life-time reproductive histories using steroid hormones in cephalopod beaks","authors":"Erica D. Durante,&nbsp;Michael D. Wiese,&nbsp;Ashley S. Meakin,&nbsp;Karina C. Hall,&nbsp;Zoë A. Doubleday","doi":"10.1002/lol2.70000","DOIUrl":"10.1002/lol2.70000","url":null,"abstract":"<p>Reproductive data are vital for fisheries and conservation management. For cephalopods, reproductive data are usually obtained by analyzing gonads, which only provide data on an individual at a given time and require whole deceased specimens. We developed a novel method for extracting reproductive hormones from along the growth axis of a chitinous structure which could thus provide lifetime reproductive histories. We tested our method on two octopus species by taking small subsamples (&gt; 2 mg) of beak tissue along the growth axis. Estradiol and progesterone were detected in both sexes and species, but testosterone was not. Hormonal peaks were observed, likely indicating the timing of sexual maturity; however, peaks were not matched to absolute age. This is the first study to analyze hormones in the accretionary tissues of a marine invertebrate and could be used to collect vital reproductive data, such as age at maturity, on poorly understood species.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 2","pages":"212-222"},"PeriodicalIF":5.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.70000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Oyster shells as archives of present and past environmental variability and life history traits: A multi-disciplinary review of sclerochronology methods and applications","authors":"Vincent Mouchi,&nbsp;C. Fred T. Andrus,&nbsp;Antonio G. Checa,&nbsp;Mary Elliot,&nbsp;Erika Griesshaber,&nbsp;Niklas Hausmann,&nbsp;Damien Huyghe,&nbsp;Franck Lartaud,&nbsp;Melita Peharda,&nbsp;Niels J. de Winter","doi":"10.1002/lol2.10461","DOIUrl":"10.1002/lol2.10461","url":null,"abstract":"<p>Oysters inhabit a variety of coastal and deep-sea settings over a wide latitudinal range and have a role as ecosystem engineers. They also represent an important food source for humans since hunter-gatherer times, which motivates interest in using oyster shells as environmental and life history archives. Still, oysters have often been disregarded in sclerochronology studies, although several methods based on both microtextural and geochemical approaches have successfully been investigated. We review how these methods have been used to improve interpretations of shell records, and we identify knowledge gaps in a variety of disciplines. Those include ecology to study larval dispersal and growth rates; archaeology to determine shell midden constructions and site occupations; and palaeoenvironmental and palaeoclimate reconstructions from tidal to annual timescales. We also suggest standardizing sclerochronology procedures to improve palaeoenvironmental reconstructions and biophysical models on oyster larval dispersal.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 2","pages":"179-199"},"PeriodicalIF":5.1,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10461","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143056386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"A global dataset of nitrogen fixation rates across inland and coastal waters","authors":"Robinson W. Fulweiler, Megan E. Berberich, Shelby A. Rinehart, Jason M. Taylor, Michelle C. Kelly, Nicholas E. Ray, Autumn Oczkowski, Sawyer J. Balint, Alexandra H. Geisser, Catherine R. Mahoney, Mar Benavides, Matthew J. Church, Brianna Loeks, Silvia E. Newell, Malin Olofsson, Jimmy C. Oppong, Sarah S. Roley, Carmella Vizza, Samuel T. Wilson, Peter M. Groffman, J. Thad Scott, Amy M. Marcarelli","doi":"10.1002/lol2.10459","DOIUrl":"https://doi.org/10.1002/lol2.10459","url":null,"abstract":"Biological nitrogen fixation is the conversion of dinitrogen (N<jats:sub>2</jats:sub>) gas into bioavailable nitrogen by microorganisms with consequences for primary production, ecosystem function, and global climate. Here we present a compiled dataset of 4793 nitrogen fixation (N<jats:sub>2</jats:sub>‐fixation) rates measured in the water column and benthos of inland and coastal systems via the acetylene reduction assay, <jats:sup>15</jats:sup>N<jats:sub>2</jats:sub> labeling, or N<jats:sub>2</jats:sub>/Ar technique. While the data are distributed across seven continents, most observations (88%) are from the northern hemisphere. <jats:sup>15</jats:sup>N<jats:sub>2</jats:sub> labeling accounted for 67% of water column measurements, while the acetylene reduction assay accounted for 81% of benthic N<jats:sub>2</jats:sub>‐fixation observations. Dataset median area‐, volume‐, and mass‐normalized N<jats:sub>2</jats:sub>‐fixation rates are 7.1 <jats:italic>μ</jats:italic>mol N<jats:sub>2</jats:sub>‐N m<jats:sup>−2</jats:sup> h<jats:sup>−1</jats:sup>, 2.3 × 10<jats:sup>−4</jats:sup> <jats:italic>μ</jats:italic>mol N<jats:sub>2</jats:sub>‐N L<jats:sup>−1</jats:sup> h<jats:sup>−1</jats:sup>, and 4.8 × 10<jats:sup>−4</jats:sup> <jats:italic>μ</jats:italic>mol N<jats:sub>2</jats:sub>‐N g<jats:sup>−1</jats:sup> h<jats:sup>−1</jats:sup>, respectively. This dataset will facilitate future efforts to study and scale N<jats:sub>2</jats:sub>‐fixation contributions across inland and coastal aquatic environments.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"3 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Calcium carbonate and phosphorus interactions in inland waters","authors":"Jessica R. Corman","doi":"10.1002/lol2.10452","DOIUrl":"10.1002/lol2.10452","url":null,"abstract":"<p>Phosphorus, an element essential to all life, is impacted by calcium carbonate (CaCO₃) co-precipitation and dissolution dynamics across aquatic ecosystems. Changes to climate, hydrology, and eutrophication, coupled with differences in terminology related to naming CaCO₃-producing ecosystems (i.e., chalk, carbonate, karst, travertine), point to the urgency and challenges in understanding this portion of the phosphorus cycle. Forms of CaCO₃ vary across inland aquatic ecosystems, from “whiting events” in open waters to massive travertine or tufa formations to cemented layers on basal resources. And, across lakes, streams, and wetlands, periphyton mats and microbialites may form in photic regions. These biogenic carbonate structures beg the question: if aerobic photosynthesis promotes CaCO₃ precipitation, but CaCO₃ precipitation sequesters P, is this a challenge or opportunity for organisms? This review considers that question and others to better characterize this unexpectedly dynamic and influential portion of a major biogeochemical cycle.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 2","pages":"158-178"},"PeriodicalIF":5.1,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10452","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143026601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Tried and true vs. shiny and new: Method switching in long-term aquatic datasets","authors":"Catriona L. C. Jones,&nbsp;Kelsey J. Solomon,&nbsp;Emily R. Arsenault,&nbsp;Katlin D. Edwards,&nbsp;Atefah Hosseini,&nbsp;Hadis Miraly,&nbsp;Alexander W. Mott,&nbsp;Karla Münzner,&nbsp;Igor Ogashawara,&nbsp;Carly R. Olson,&nbsp;Meredith E. Seeley,&nbsp;John C. Tracey","doi":"10.1002/lol2.10438","DOIUrl":"10.1002/lol2.10438","url":null,"abstract":"&lt;p&gt;Long-term datasets are foundational resources in aquatic research, vital for establishing baselines and detecting shifts in aquatic biodiversity, water quality, and ecosystem function. For example, the Hawaii Ocean Time Series (HOTS), which has sampled biogeochemical data at Station Aloha in the North Pacific Subtropical Gyre since 1988, played a crucial role in documenting temporal variability in ocean carbon inventories and fluxes and provided the first evidence for a multi-decade decline in marine pH associated with climate change (Dore et al. &lt;span&gt;2009&lt;/span&gt;). Research from U.S. National Science Foundation Long Term Ecological Research sites has advanced understanding of ecosystem dynamics, including the long-term effects of invasive species on lakes (e.g., Walsh et al. &lt;span&gt;2016&lt;/span&gt;) and the influence of disturbances on watershed biogeochemical processes (e.g., Miniat et al. &lt;span&gt;2021&lt;/span&gt;). Finally, another NSF initiative, the Continuous Plankton Recorder surveys, are some of the longest-running aquatic long-term datasets, with one survey collecting data continuously since 1931 (www.cprsurvey.org). These surveys have demonstrated how climate change is affecting plankton communities.&lt;/p&gt;&lt;p&gt;The insights gained from such long-term datasets are only as robust as the data that have been collected. It is, therefore, a priority for those managing long-term datasets to ensure data quality. Advances in technology or sampling methods often leave researchers with a dilemma: switch to the newer method (i.e., “emerging” method) and take advantage of novel technologies, or continue with the older, existing method (i.e., “established” method) and maintain continuity in sampling protocol. Long-term dataset managers may choose to adopt emerging methods for many reasons: the emerging method could be faster, more efficient and/or more cost-effective, it might offer real-time data collection, or it could reveal previously unattainable or undetectable information. As a group of early career researchers, many of the authors of this essay have been in the position of taking responsibility for managing long-term aquatic datasets and have seen first-hand the importance of mindful data stewardship. Researchers commonly acknowledge the challenges associated with method switching in long-term monitoring programs. However, these discussions often occur informally between small groups of colleagues, not among the wider scientific community. As such, the literature lacks first-hand examples of how to proceed with adopting new methods. Here, our goal is to initiate broader discussion among current and future managers of long-term datasets in the aquatic sciences to help guide decisions about method switching. To achieve this, we discuss indicators of method-switching successes and failures. Then, we outline three case studies of method-switching successes in long-term datasets and suggest a set of best practices. We acknowledge that certain emerging methods pr","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 2","pages":"151-157"},"PeriodicalIF":5.1,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10438","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Catastrophic bleaching in protected reefs of the Southern Great Barrier Reef","authors":"Maria Byrne, Alexander Waller, Matthew Clements, Aisling S. Kelly, Michael J. Kingsford, Bailu Liu, Claire E. Reymond, Ana Vila‐Concejo, Monique Webb, Kate Whitton, Shawna A. Foo","doi":"10.1002/lol2.10456","DOIUrl":"https://doi.org/10.1002/lol2.10456","url":null,"abstract":"The iconic Great Barrier Reef (GBR) experienced mass coral bleaching in early 2024. In the southern GBR, heat stress triggered severe and widespread bleaching to levels not previously recorded and impacted a diverse range of coral genera at One Tree Reef (OTR). Over 161 d, we tracked the health of 462 coral colonies from heatwave peak to autumn and winter cooling. In February and April, 66% and 80% of the colonies were bleached, respectively. By May, 44% of the bleached colonies were dead and 53% in July. In July, 31% of colonies were still bleached and 16% recovered. <jats:italic>Goniopora</jats:italic> developed black band disease contributing to high mortality. Colony collapse occurred in <jats:italic>Acropora</jats:italic> (95% mortality) with accumulation of algal‐fouled fragments. In‐water tracking of individual colonies showed rapid bleaching, disease onset and mortality. The protected status and offshore location did not protect OTR from heat stress bleaching and mortality.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"17 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142988032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Calcium carbonate cycling in the Southern Ocean: insights from dissolved calcium and potential alkalinity tracers","authors":"Yaojia Sun,&nbsp;Michael J. Ellwood","doi":"10.1002/lol2.10457","DOIUrl":"10.1002/lol2.10457","url":null,"abstract":"<p>The cycling of calcium carbonate (CaCO₃) plays a significant role in deep-water carbon sequestration and affects the buffer capacity of the upper ocean for absorbing atmospheric CO₂. This study investigates the role of dissolved calcium (Ca) and potential alkalinity (PA) as tracers for CaCO₃ cycling in the Southern Ocean. The correlation between PA and Ca concentrations in subantarctic and polar waters supports their use as effective tracers of the process of CaCO₃ dissolution and precipitation. Estimates of particulate inorganic carbon export flux based on Ca concentration reveals substantial contributions in the Southern Ocean, with higher values in the subantarctic waters. These findings highlight the value of Ca and PA as tracers for understanding CaCO₃ cycling and its role in carbon sequestration and buffering atmospheric CO₂.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 2","pages":"254-263"},"PeriodicalIF":5.1,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10457","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}