Limnology and Oceanography Letters最新文献

{"title":"Disaster avoided: current state of the Baltic Sea without human intervention to reduce nutrient loads","authors":"Eva Ehrnsten,&nbsp;Christoph Humborg,&nbsp;Erik Gustafsson,&nbsp;Bo G. Gustafsson","doi":"10.1002/lol2.10443","DOIUrl":"10.1002/lol2.10443","url":null,"abstract":"<p>Excessive nutrient inputs have caused eutrophication of coastal ecosystems worldwide, triggering extensive algal blooms, oxygen-depletion, and collapse of local fisheries. In the Baltic Sea, inputs of nitrogen (N) and phosphorus (P) have been significantly reduced since the 1980s, but the environmental state shows little to no signs of recovery. However, a simulation with continued high loads from the mid-1980s demonstrates that while the state has not improved yet, it would be considerably worse today without the load reductions (e.g., 82% larger oxygen-free bottom areas and 104% and 58% higher wintertime concentrations of inorganic N and P, respectively, in the Baltic Proper). Additional simulations with current nutrient loads continuing into the future indicate that conditions will likely improve in the coming decades. This study underscores the significance of acting on early warning signs of eutrophication, and furthermore how sustained efforts to decrease nutrient loads can mitigate the severity of eutrophication.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 3","pages":"318-328"},"PeriodicalIF":5.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10443","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142374049","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":"Dense vegetation hinders sediment transport toward saltmarsh interiors","authors":"Olivier Gourgue,&nbsp;Jean-Philippe Belliard,&nbsp;Yiyang Xu,&nbsp;Maarten G. Kleinhans,&nbsp;Sergio Fagherazzi,&nbsp;Stijn Temmerman","doi":"10.1002/lol2.10436","DOIUrl":"10.1002/lol2.10436","url":null,"abstract":"<p>To save saltmarshes and their valuable ecosystem services from sea level rise, it is crucial to understand their natural ability to gain elevation by sediment accretion. In that context, a widely accepted paradigm is that dense vegetation favors sediment accretion and hence saltmarsh resilience to sea level rise. Here, however, we reveal how dense vegetation can inhibit sediment accretion on saltmarsh platforms. Using a process-based modeling approach to simulate biogeomorphic development of typical saltmarsh landscapes, we identify two key mechanisms by which vegetation hinders sediment transport from tidal channels toward saltmarsh interiors. First, vegetation concentrates tidal flow and sediment transport inside channels, reducing sediment supply to platforms. Second, vegetation enhances sediment deposition near channels, limiting sediment availability for platform interiors. Our findings suggest that the resilience of saltmarshes to sea level rise may be more limited than previously thought.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"9 6","pages":"764-775"},"PeriodicalIF":5.0,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10436","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142374394","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":"Extreme plasticity in the photosystem composition of a low-light Prochlorococcus ecotype in response to iron and light","authors":"Xin Zhang,&nbsp;William G. Sunda,&nbsp;Haizheng Hong,&nbsp;Dalin Shi","doi":"10.1002/lol2.10441","DOIUrl":"10.1002/lol2.10441","url":null,"abstract":"<p>Light affects the cellular iron (Fe) requirement of phytoplankton because of its presence in major photosynthetic proteins. Thus, interactions between variable Fe concentrations and light intensities could restrict photosynthetic carbon fixation in the ocean. Here we show a narrowing of the optimal light range for growth of a marine cyanobacterium, <i>Prochlorococcus</i> strain NATL1A, a member of LLI ecotype, under Fe limitation. The response of the cells to variations in Fe and light involved differential changes in the cellular content of low-Fe photosystem II (PSII) and Fe-rich photosystem I (PSI), and associated up to 23-fold changes in PSII : PSI ratios, showing an unprecedented extreme plasticity of the photosynthetic apparatus. Our study demonstrated the physiological effects of Fe and light interactions on this low-light-adapted <i>Prochlorococcus</i> strain, and increases our understanding of the reasons for the wide distribution of this and possibly other <i>Prochlorococcus</i> strains in the ocean.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 1","pages":"82-90"},"PeriodicalIF":5.0,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10441","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142328813","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":"Unexpected mismatches in population structure among marine mussel life-history stages reveal the true scales of planktonic larval dispersal","authors":"Jody-Carynn Oliver,&nbsp;Francesca Porri,&nbsp;Arsalan Emami-Khoyi,&nbsp;Peter R. Teske","doi":"10.1002/lol2.10439","DOIUrl":"10.1002/lol2.10439","url":null,"abstract":"<p>Studies investigating gene flow in sessile or sedentary marine species typically draw conclusions about larval dispersal by investigating genetic structure of adults. Here, we generated microsatellite data from adults, recruits, settlers and planktonic larvae of the brown mussel, <i>Perna perna</i>, from the southeast coast of South Africa, and identified a consistent mismatch in genetic structure between the adults and all earlier life stages. While adults could be assigned to two major geographical groups (western and eastern), most of the early-stage mussels were strongly affiliated with the eastern group. This suggests that few of the early-stage individuals present in the western portion of the sampling range will eventually establish themselves in the adult population, highlighting the importance of post-recruitment processes as drivers of population structure. Our findings caution against the exclusive use of genetic data generated from adults to assess population connectivity facilitated by the dispersal of planktonic propagules.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"9 6","pages":"806-814"},"PeriodicalIF":5.0,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10439","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142276940","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":"Correction to “Global subterranean estuaries modify groundwater nutrient loading to the ocean”","authors":"","doi":"10.1002/lol2.10433","DOIUrl":"10.1002/lol2.10433","url":null,"abstract":"<p>Wilson, S. J., and others. 2024. Global subterranean estuaries modify groundwater nutrient loading to the ocean. Limnol. Oceanogr.: Lett. <b>9</b>: 411–422. doi:10.1002/lol2.10390.</p><p>In the author affiliation section, the first and third affiliation for the co-author “Michael Ernst Böttcher” have been revised to “Geochemistry &amp; Isotope Biogeochemistry, Leibniz Institute for Baltic Sea Research, Warnemünde, Germany” and “Interdisciplinary Faculty, University of Rostock, Rostock, Germany.” The second affiliation has no changes and it has been left as it was stated originally in this article when it was first published online.</p><p>We apologize for this error.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"9 6","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10433","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142275554","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":"Delineating population structure of resilient sea/river-type sockeye salmon","authors":"Kyle G. Brennan,&nbsp;Sean R. Brennan,&nbsp;Timothy Cline,&nbsp;Gabriel J. Bowen","doi":"10.1002/lol2.10437","DOIUrl":"10.1002/lol2.10437","url":null,"abstract":"<p>Conserving wild fisheries requires identifying and monitoring distinct populations, yet prevalent genetic approaches often do not integrate habitat data and may not fully delineate these structures. This issue is critical in sea/river-type sockeye salmon (<i>Oncorhynchus nerka</i>), an ecotype whose specific spawning habitats better define distinct breeding populations. Despite possessing traits that confer greater resilience to climate change and significant contributions to wild fisheries, gene flow among groups dilutes genetic structure, making it difficult to track populations. We focus on sea/river sockeye from one of the Pacific Rim's largest Sockeye fisheries, combining river strontium (Sr) isotope predictions, otolith Sr isotope measurements, and a Bayesian assignment model with a 4-yr radiotelemetry and genetic dataset (<i>n</i> = 1994) to delineate the geographic structure of spawning habitats. Our results identify four distinct subpopulations with unique natal habitat Sr isotope ratios previously undifferentiated by genetic methods, providing a novel approach to monitor critical groups over multiple years.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 2","pages":"223-233"},"PeriodicalIF":5.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10437","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142245213","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":"Advancing phenology in limnology and oceanography","authors":"Hilary A. Dugan,&nbsp;Zachary S. Feiner,&nbsp;Monika Winder,&nbsp;Heidi M. Sosik,&nbsp;Emily H. Stanley","doi":"10.1002/lol2.10432","DOIUrl":"10.1002/lol2.10432","url":null,"abstract":"&lt;p&gt;Phenology, the study of the seasonal timing of natural phenomena, is a central construct in ecology, focusing on interactions between temporal changes in the physical environment and the structuring of annual organismal, population, community, and ecosystem dynamics (Forrest and Miller-Rushing &lt;span&gt;2010&lt;/span&gt;). In aquatic ecology, phenology explicitly or implicitly forms the basis of several foundational concepts. For example, the match/mismatch hypothesis (Cushing &lt;span&gt;1990&lt;/span&gt;) theorizes that the survival of newly hatched fish larvae will depend on their temporal overlap with peak production of their food resources, namely plankton, and was explicitly developed from earlier phenological studies of phytoplankton (Cushing &lt;span&gt;1967&lt;/span&gt;) and fish spawning (Hjort &lt;span&gt;1914&lt;/span&gt;; Cushing &lt;span&gt;1969&lt;/span&gt;). The Plankton Ecology Group (PEG) model (Sommer et al. &lt;span&gt;1986&lt;/span&gt;, &lt;span&gt;2012&lt;/span&gt;) implicitly draws on phenological concepts to explain observed, predictable seasonal succession in plankton communities.&lt;/p&gt;&lt;p&gt;Despite the centrality of phenology in how we understand aquatic ecosystems, the study of aquatic phenology lags behind its terrestrial counterpart. We see three related explanations for slower progress in the aquatic realm. First and most simply, observing phenological phenomena in aquatic systems is difficult because they occur out of sight, and monitoring is costly as a result. Terrestrial research has benefited from the wealth of observations collected by well-coordinated volunteer networks (e.g., National Phenology Network [NPN], European Phenology Network, and the Global Phenological Monitoring Programme) that report observations often at a daily timescale outfitted with little to no equipment. Aquatic representation within these programs is largely limited to observations of the appearance of aquatic birds, large fish, amphibians, or budding/blooming of well-known riparian or wetland vegetation. The relative ease of tracking terrestrial organisms has also allowed deeper investigations of the ecological and evolutionary processes driving terrestrial phenology, including the ability of organisms to adapt to shifting seasonality (Anderson et al. &lt;span&gt;2012&lt;/span&gt;; Kingsolver and Buckley &lt;span&gt;2015&lt;/span&gt;). Thus, it is not surprising that a literature search on the study of phenology reveals a terrestrial bias, with studies dominated by topics such as the timing of bird migration or the appearance of various developmental stages among a range of plant species and locations.&lt;/p&gt;&lt;p&gt;Second, the problem of observing subsurface events or behaviors is compounded by the short life cycles and small body sizes of key aquatic groups. Short generation times mean that notable phenological events occur rapidly and briefly, and small body sizes allow many species to escape notice even under the best of circumstances. Thus, one cannot track the appearance and decline of a spring phytoplankton bloom or the emergence of zooplankto","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"9 5","pages":"506-511"},"PeriodicalIF":5.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10432","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142231650","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":"Multiple climatic drivers increase pace and consequences of ecosystem change in the Arctic Coastal Ocean","authors":"Mikael K. Sejr,&nbsp;Amanda E. Poste,&nbsp;Paul E. Renaud","doi":"10.1002/lol2.10431","DOIUrl":"10.1002/lol2.10431","url":null,"abstract":"<p>The impacts of climate change on Arctic marine systems are noticeable within the scientific “lifetime” of most researchers and the iconic image of a polar bear struggling to stay on top of a melting ice floe captures many of the dominant themes of Arctic marine ecosystem change. But has our focus on open-ocean systems and parameters that are more easily modeled and sensed remotely neglected an element that is responding more dramatically and with broader implications for Arctic ecosystems? We argue that a complementary set of changes to the open ocean is occurring along Arctic coasts, amplified by the interaction with changes on land and in the sea. We observe an increased number of ecosystem drivers with larger implications for the ecological and human communities they touch than are quantifiable in the open Arctic Ocean. Substantial knowledge gaps exist that must be filled to support adaptation and sustainability of socioecological systems along Arctic coasts.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"9 6","pages":"683-695"},"PeriodicalIF":5.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10431","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142174709","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 dataset of individual wet weights of benthic macroinvertebrates","authors":"Allison R. Hrycik,&nbsp;Lyubov E. Burlakova,&nbsp;Alexander Y. Karatayev,&nbsp;Susan E. Daniel,&nbsp;Ronald Dermott,&nbsp;Morgan Tarbell,&nbsp;Elizabeth K. Hinchey","doi":"10.1002/lol2.10428","DOIUrl":"10.1002/lol2.10428","url":null,"abstract":"<p>Biomass estimates are crucial for modeling and understanding energy flow through ecosystems. Many modeling frameworks rely on published body weights of organisms to convert density estimates to biomass. However, published body weight data are limited to few taxa in a limited number of systems. Here we present mean individual weights for common benthic macroinvertebrates of the Laurentian Great Lakes from over 2000 benthic samples and 8 yr of data collection. We also compiled wet to dry weight conversions to facilitate data reuse for researchers interested in dry weight. We compared our benthic invertebrate weights to other lakes, demonstrating when weight measurements may be applied outside the Great Lakes. Sensitivity analyses supported the robustness of our calculations. Our dataset is applicable to food web energy flow models, calculation of secondary production, interpretation of trophic markers, and for understanding how biomass distribution varies by benthic invertebrate species in the Great Lakes.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"9 6","pages":"696-715"},"PeriodicalIF":5.0,"publicationDate":"2024-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10428","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142085664","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":"Eutrophication and urbanization enhance methane emissions from coastal lagoons","authors":"Stefano Bonaglia,&nbsp;Henry L. S. Cheung,&nbsp;Tobia Politi,&nbsp;Irma Vybernaite-Lubiene,&nbsp;Tristan McKenzie,&nbsp;Isaac R. Santos,&nbsp;Mindaugas Zilius","doi":"10.1002/lol2.10430","DOIUrl":"10.1002/lol2.10430","url":null,"abstract":"<p>Coastal lagoons are important nutrient filters and carbon sinks but may release large amounts of methane (CH₄) to the atmosphere. Here, we hypothesize that eutrophication and population density will turn coastal lagoons into stronger methane emitters. We report benthic fluxes from 187 sediment cores incubated from three of the largest European lagoons suffering persistent eutrophication. Methane fluxes were mainly driven by sediment porosity, organic matter, and dissolved inorganic carbon (DIC) fluxes. Methane was always supersaturated (250–49,000%) in lagoon waters leading to large, variable emissions of 0.04–26 mg CH₄ m⁻² d⁻¹. Combining our new dataset with earlier estimates revealed a global coastal lagoon emission of 7.9 (1.4–34.7) Tg CH₄ yr⁻¹ with median values of 5.4 mg CH₄ m⁻² d⁻¹. Lagoons with very highly populated catchments released much more methane (223 mg CH₄ m⁻² d⁻¹). Overall, projected increases in eutrophication, organic loading and population densities will enhance methane fluxes from lagoons worldwide.</p>","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":"10 1","pages":"140-150"},"PeriodicalIF":5.0,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lol2.10430","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142050579","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}