Limnology and Oceanography Letters最新文献

{"title":"Tried and true vs. shiny and new: Method switching in long-term aquatic datasets","authors":"Catriona L. C. Jones, Kelsey J. Solomon, Emily R. Arsenault, Katlin D. Edwards, Atefah Hosseini, Hadis Miraly, Alexander W. Mott, Karla Münzner, Igor Ogashawara, Carly R. Olson, Meredith E. Seeley, John C. Tracey","doi":"10.1002/lol2.10438","DOIUrl":"10.1002/lol2.10438","url":null,"abstract":"<p>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. <span>2009</span>). 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. <span>2016</span>) and the influence of disturbances on watershed biogeochemical processes (e.g., Miniat et al. <span>2021</span>). 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.</p><p>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}

{"title":"From historians to forecasters: The potential of bivalve records to assess resilience and provide early warnings for marine tipping points","authors":"Beatriz Arellano-Nava,&nbsp;Chris A. Boulton,&nbsp;David J. Reynolds,&nbsp;Paul G. Butler,&nbsp;James Scourse,&nbsp;Timothy M. Lenton,&nbsp;Paul R. Halloran","doi":"10.1002/lol2.10455","DOIUrl":"10.1002/lol2.10455","url":null,"abstract":"<p>Amidst the ongoing climate crisis, the need for observation-based prediction of environmental tipping points becomes increasingly urgent. Detecting loss of resilience within a system can provide early warnings for tipping points. This requires long, regularly spaced time-series, characteristics that are rare among marine observational and proxy records. Due to their remarkable length and temporal resolution, records from bivalve shells offer a unique opportunity for assessing resilience in the marine environment. Here, we investigate the suitability of bivalve records for measuring changes in two resilience indicators, autocorrelation and variance. We find that increment-width records typically considered robust can provide reliable resilience assessments. However, while autocorrelation is a generally robust indicator for increment-width series, variance may exhibit biases mainly associated with age-related effects. This work provides guidelines for obtaining reliable resilience assessments from bivalve records, unlocking their potential to provide early warnings for tipping points.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 2","pages":"200-211"},"PeriodicalIF":5.1,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10455","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940186","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":"Light and nutrients modulate the temperature-sensitivity of growth in phytoplankton","authors":"Vanessa Weber de Melo,&nbsp;Marc J.-F. Suter,&nbsp;Anita Narwani","doi":"10.1002/lol2.10453","DOIUrl":"10.1002/lol2.10453","url":null,"abstract":"<p>In aquatic ecosystems facing climate change, higher temperatures often co-occur with alterations in resource availability. The metabolic theory of ecology uses activation energy to assess the sensitivity of biological processes to temperature, but neglects how resource availability might modify temperature sensitivities. To understand the impacts of resource limitation on temperature sensitivities, we performed experiments manipulating temperature and three key resources (nitrogen, phosphorus, and light) in six species of freshwater phytoplankton. We measured activation energies of population growth rates and how they were modulated by resource limitation. We find that the interaction of temperature and resource limitation is dependent on the resource type. Phosphorus limitation did not modify the temperature sensitivity of growth rates, light limitation reduced the sensitivity of growth rates to temperature in all species, and nitrogen limitation had species-dependent effects. We explore how stoichiometry and cell physiology may explain the complex responses of phytoplankton to multiple environmental changes.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 1","pages":"91-100"},"PeriodicalIF":5.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10453","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142937544","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":"Sink or break: Oil increases resistance of phytoplankton aggregates to fragmentation","authors":"Kai Ziervogel,&nbsp;Julia A. Sweet,&nbsp;Yixuan Song,&nbsp;Laura Bretherton,&nbsp;Matthew J. Rau,&nbsp;Antonietta Quigg,&nbsp;Uta Passow","doi":"10.1002/lol2.10454","DOIUrl":"10.1002/lol2.10454","url":null,"abstract":"<p>Fragmentation of marine snow affects the downward flux of organic matter, and other aggregate-associated compounds such as oil. Using phytoplankton aggregates, we demonstrate that marine snow with oil, termed marine oil snow, had a higher resistance to fragmentation compared to marine snow without oil when exposed to turbulence ex situ. At moderate shear levels, typical of the ocean mixed layer, 17% of marine snow without oil broke, whereas 63% of marine snow fragmented at intermediate shear. In contrast, only 17% and 33% of marine oil snow fragmented at the intermediate and highest shear levels, respectively. Our results suggest that oil increases the cohesion and stability of aggregates making them less susceptible to breaking. This work contributes toward explaining the exceptional oil sedimentation event following the 2010 spill in Gulf of Mexico. It also enhances our understanding of the factors that determine the probability of sinking aggregates to fragment.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 1","pages":"73-81"},"PeriodicalIF":5.1,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10454","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142884253","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 model of near-sea ice phytoplankton blooms","authors":"C. W. Lester,&nbsp;T. J. W. Wagner,&nbsp;Dylan E. McNamara","doi":"10.1002/lol2.10449","DOIUrl":"10.1002/lol2.10449","url":null,"abstract":"<p>Arctic phytoplankton spring blooms have increased in magnitude and extent over the past two decades, particularly in waters near the sea ice edge. We develop an idealized model of phytoplankton dynamics that takes into account the role of sea ice meltwater flux and its impact on surface mixed layer depth. Satellite observations feature a characteristic peak in phytoplankton concentration at around 100 km from the ice edge. Model dynamics capture this peak and overall structure of the phytoplankton distribution. In the model, the characteristic spatial scale emerges from a balance of exponential growth near the ice edge, horizontal advection, and increased decay with distance from the ice as the mixed layer deepens. Observations and data further agree in that meltwater impacts phytoplankton concentrations up to 1000 km from the ice edge. Results suggest that reduced meltwater input under future sea ice retreat may suppress spring phytoplankton blooms in the region.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 2","pages":"245-253"},"PeriodicalIF":5.1,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10449","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142867413","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":"Future Arctic: how will increasing coastal erosion shape nearshore planktonic food webs?","authors":"Gabriel A. Juma,&nbsp;Cédric L. Meunier,&nbsp;Emily M. Herstoff,&nbsp;Anna M. Irrgang,&nbsp;Michael Fritz,&nbsp;Caroline Weber,&nbsp;Hugues Lantuit,&nbsp;Inga V. Kirstein,&nbsp;Maarten Boersma","doi":"10.1002/lol2.10446","DOIUrl":"10.1002/lol2.10446","url":null,"abstract":"<p>Arctic regimes. Currently, warming accelerates the erosion of permafrost coasts and the associated discharge of sediment, carbon, and nutrients into the Arctic Ocean. However, the impacts of coastal erosion on planktonic food webs remain understudied. We aimed to (1) understand how coastal erosion impacts nearshore carbon, nutrient, and light regimes; (2) investigate the effects on primary production and energy transfer; and (3) predict how increased erosion will impact the productivity of consumers, and the overall food web interactions. We found that sediment discharge increases turbidity (darkening). This darkening is expected to hamper phytoplankton productivity, while additional carbon input will provide bacteria with direct energy sources, and shift the balance between basal autotrophic and heterotrophic production. Since the heterotrophic pathway has a lower efficiency, its dominance might negatively affect mesozooplankton. Increased Arctic coastal erosion might therefore influence planktonic food webs by changing mechanisms of energy mobilization and transfer to higher trophic levels.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 1","pages":"5-17"},"PeriodicalIF":5.1,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10446","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142823092","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":"Mineral surface area of sinking particles in the deep ocean interior: Preliminary implications","authors":"Minkyoung Kim, Thomas M. Blattmann, Baozhi Lin, Sun‐A Lee, Daniel B. Montluçon, Timothy I. Eglinton","doi":"10.1002/lol2.10450","DOIUrl":"https://doi.org/10.1002/lol2.10450","url":null,"abstract":"Measurement of the mineral surface area (MSA) of sedimentary particles is a traditional approach for studying the transport and protection of organic carbon (OC) in marine systems. We investigated the application of MSA on the biological carbon pump in the deep ocean interior in the Ulleung Basin (UB), East/Japan Sea. This is the second study of sinking particle MSA, and the first in an ocean with no major riverine (terrestrial) input. We measured seasonal and vertical variations in the MSA of sinking particles and adjacent surface sediments in the UB. Mineral surface area values exhibit seasonal variations associated with particle composition, with a negative correlation with OC content and a strong positive correlation with the content of lithogenic material and the radiocarbon values of sinking OC. Our results indicate that the MSA of sinking particles may provide clues to the processes of particle resuspension and decomposition.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"233 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142804906","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":"Capitalizing on the wealth of chemical data in the accretionary structures of aquatic taxa: Opportunities from across the tree of life","authors":"Zoë A. Doubleday,&nbsp;Louise Hosking,&nbsp;Jasper Willoughby,&nbsp;Minoli Dias,&nbsp;Natasha Leclerc,&nbsp;Shanie Brault Nikolajew,&nbsp;Melita Peharda,&nbsp;Arieli Tristão Rézio,&nbsp;Clive Trueman","doi":"10.1002/lol2.10448","DOIUrl":"10.1002/lol2.10448","url":null,"abstract":"<p>Aquatic organisms are natural data loggers and record chemical variations within hardened accretionary structures like shells and teeth. Chemical sclerochronology is the study of these chemical variations through time and how they are used to understand environmental change and the physiology and ecology of species. While sclerochronology research has largely focused on bivalves, teleost fish, and hard corals, there are many other aquatic taxa rich with time-resolved chemical data. To expand focus to these “other” taxa and determine the state-of-play, we compiled a database of chemical sclerochronology studies spanning nine living phyla and 19 classes. We then examined research trends and knowledge gaps across these taxa and showcase their exciting potential to collect critical data and address pressing environmental and ecological challenges. We hope this synthesis will encourage further research on species across the tree of life, as well as foster collaboration among the established and lesser-known fields of sclerochronology.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 1","pages":"18-36"},"PeriodicalIF":5.1,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10448","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142637057","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}