Limnology and Oceanography最新文献

{"title":"Differential effects of Daphnia genotype composition on spatial environmental heterogeneity in experimental metacommunities","authors":"Romana Limberger, Jenny Spaak, Helmut Bürgmann, Piet Spaak, Blake Matthews","doi":"10.1002/lno.70043","DOIUrl":"https://doi.org/10.1002/lno.70043","url":null,"abstract":"Spatial environmental heterogeneity is an important driver of aquatic biodiversity. Ecological and evolutionary theory often consider spatial heterogeneity as being driven by exogenous factors, yet heterogeneity can also be generated and modified by organisms. Here we used a mesocosm experiment to investigate if consumers influence the build‐up of spatial heterogeneity. We expected that consumer effects on heterogeneity would depend on consumer composition and differ among response variables. We constructed metacommunities consisting of three mesocosms and manipulated the presence and composition of consumers, using four treatment levels: (1) no consumers, (2) two genotypes of <jats:italic>Daphnia galeata</jats:italic>, (3) <jats:italic>D. galeata</jats:italic> and <jats:italic>Daphnia longispina</jats:italic>, and (4) <jats:italic>D. galeata</jats:italic> and a hybrid of <jats:italic>D. galeata × D. longispina</jats:italic>. We then continuously increased heterogeneity among the three patches of each metacommunity by adding nutrients and dissolved organic carbon (DOC), respectively, to two of the three mesocosms. We found that consumers affected the build‐up of heterogeneity, but the direction and magnitude of this effect differed among consumer compositions. Metacommunities with only <jats:italic>D. galeata</jats:italic> had increased heterogeneity in phytoplankton biomass, whereas metacommunities with <jats:italic>D. longispina</jats:italic> or the hybrid had low phytoplankton heterogeneity. The differential effects of <jats:italic>Daphnia</jats:italic> taxa on phytoplankton heterogeneity cascaded down to the abiotic environment and resulted in taxon‐specific effects on heterogeneity in light extinction, dissolved inorganic nitrogen, and total inorganic carbon. Our results imply that changes in consumer species (e.g., due to environmental change or invasion) might affect not only the local environment but could also impact heterogeneity among environments, with important consequences for aquatic biodiversity.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"26 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736621","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}

{"title":"Dynamics of surface accretion and surface elevation differ between river and tide dominated settings in tropical mangroves","authors":"Catherine E. Lovelock, Marilyn C. Ball, Nigel Brothers, Alex Pearse, Ruth Reef","doi":"10.1002/lno.70024","DOIUrl":"https://doi.org/10.1002/lno.70024","url":null,"abstract":"The maintenance of soil surface elevation in mangroves supports the persistence of mangroves with sea level rise. The processes contributing to soil surface elevation have rarely been assessed in the humid tropics, despite most mangroves occurring in river deltas and tidal estuaries within this climate zone. Using surface elevation table (SET) with marker horizon methods over sites that occurred on either the main river channel or a tidal channel, we assessed the role of rainfall and associated river discharge in moderating surface elevation in mangroves of the Daintree River, Queensland, Australia. In the sites in the main river channel close to the river mouth, increases in soil surface elevation were episodic, with river flooding leading to greater accretion of sediment and increases in surface elevation in years with high river discharge, while in the tidal channel further from the mouth, sediment accretion and surface elevation increments were variable among years and not linked to river discharge. Our study finds that the 32.7 km<jats:sup>2</jats:sup> of mangroves of the Daintree River estuary have surface elevation gains that are variable but similar to current rates of sea level rise through trapping of around 40,000 t of sediment annually, mainly within the downstream mangroves and those in the main river channel. Extreme rainfall and river flows have spatially variable influences on surface elevation in mangroves of the Daintree River, which may lead to similarly variable responses to accelerating sea level rise.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"66 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734136","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}

{"title":"Trout have weak effects on zooplankton diversity but strong effects on community biomass","authors":"Matthew D. Green, Kurt E. Anderson","doi":"10.1002/lno.70041","DOIUrl":"https://doi.org/10.1002/lno.70041","url":null,"abstract":"The introduction and extirpation of predators can have large impacts on food web structure and ecosystem function. The magnitude of these predator effects can be influenced by species diversity and turnover along environmental gradients in space or time, which have the potential to buffer or magnify the impact of trophic interactions on ecosystem functioning. In this study, we explored the individual species and community effects of fish predators on lake zooplankton in the Sierra Nevada, CA, USA. Local and beta diversity in zooplankton communities were resilient to fish, only marginally differing among fish and fishless sites, and were more structured along elevational gradients. Observed diversity changes were attributed to species turnover in zooplankton communities, which suggests elevational gradients and fish are acting as ecological filters excluding subsets of species rather than reducing species density. We found that fish significantly reduced densities of larger‐bodied zooplankton species. Further, as larger‐bodied species densities were lower in the presence of fish, we found that the community weighted mean of body mass decreased in the presence of fish in lakes. Although species turnover largely maintained diversity over elevational gradients and in the presence of fish, such changes in larger‐bodied taxa and community biomass may have important implications in the transfer of energy throughout the food web and to connected riparian and aquatic ecosystems that are dependent on the flow of biomass and nutrients.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"7 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734106","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}

{"title":"Correction to: Summer dynamics drive the microbial response to carbon and nutrient additions in a high‐altitude lake","authors":"","doi":"10.1002/lno.12472","DOIUrl":"https://doi.org/10.1002/lno.12472","url":null,"abstract":"","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"183 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734109","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}

{"title":"Temporal methane dynamics in the surface waters of a stratified eutrophic lake over four years","authors":"César Ordóñez, Alexandrine Massot, Tonya DelSontro, Timon Langenegger, Daphne Donis, Daniel F. McGinnis","doi":"10.1002/lno.70020","DOIUrl":"https://doi.org/10.1002/lno.70020","url":null,"abstract":"The occurrence of oxic methane production (OMP) has been reported for numerous aquatic ecosystems. Its seasonal dynamics and contribution to global methane () emissions remains uncertain, however, due to the lack of measurements constraining the spatial and temporal variability of OMP. In this study, we used data collected over 4 yrs with three types of models to estimate the net production/consumption of () in the surface mixed layer of a eutrophic lake. These models allowed us to assess the lateral contribution and the surface fluxes' variability on estimations. All model results show positive rates suggesting that OMP occurs consistently during the stratified period and was often the dominant source of surface diffusive emissions. In years with monthly data, we observed a consistent pattern of high rates at the start of stratification and a decrease towards the end of the stratified season. Along with the trends and in agreement with recent findings, correlations between vs. Secchi depth, chlorophyll <jats:italic>a</jats:italic> concentrations and light climate suggest that photoautotrophs play a role in production. Finally, using an isotopic mass balance model, we determined that the stable carbon isotopic signature of in this lake was likely between and , which aligns with published work. Clearly, OMP can be a significant component of an aquatic budget of eutrophic systems, but can vary temporally; thus, temporal variability should be considered when assessing the global contribution of OMP to aquatic emissions, particularly in systems experiencing or threatened by eutrophication.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"63 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143723311","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}

{"title":"Issue Information & Members form","authors":"","doi":"10.1002/lno.70037","DOIUrl":"https://doi.org/10.1002/lno.70037","url":null,"abstract":"","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 3","pages":"iv"},"PeriodicalIF":3.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70037","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707586","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}

{"title":"Issue Information & Masthead","authors":"","doi":"10.1002/lno.70036","DOIUrl":"https://doi.org/10.1002/lno.70036","url":null,"abstract":"","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 3","pages":"i"},"PeriodicalIF":3.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70036","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707272","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}

{"title":"Issue Information & Copyright","authors":"","doi":"10.1002/lno.70035","DOIUrl":"https://doi.org/10.1002/lno.70035","url":null,"abstract":"","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 3","pages":"ii"},"PeriodicalIF":3.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70035","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707584","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}

{"title":"Issue Information & TOC","authors":"","doi":"10.1002/lno.70038","DOIUrl":"https://doi.org/10.1002/lno.70038","url":null,"abstract":"","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"70 3","pages":"iii"},"PeriodicalIF":3.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/lno.70038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143707585","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}

{"title":"Springtime upwelling conditions influence microbial communities and dissolved thiamin compounds in the California Current Ecosystem","authors":"Kelly C. Shannon, Gillian St. John, Robin Gould, Christopher Hartzell, Hailey Matthews, Elizabeth J. Brennan, Luis M. Bolaños, Steven T. Lindley, John C. Field, Nate Mantua, Rachel Johnson, Carson Jeffres, Frederick S. Colwell, Christopher P. Suffridge","doi":"10.1002/lno.70021","DOIUrl":"https://doi.org/10.1002/lno.70021","url":null,"abstract":"Understanding dissolved concentrations of the essential coenzyme thiamin (vitamin B<jats:sub>1</jats:sub>) can provide insights into the biological controls on highly productive upwelling systems such as the California Current Ecosystem. To connect thiamin availability with microbial communities in the California Current Ecosystem, we measured concentrations of dissolved thiamin and its biochemically related moieties (thiamin congeners) and 16S rRNA gene‐based microbial communities during the spring. We found that strong upwelling caused a depletion of dissolved thiamin precursor compounds and abiotic degradation products relative to periods of weak upwelling. Specific microbial taxa, including species of SAR11 ecotypes, <jats:italic>Candidatus</jats:italic> Nitrosopumilus, and SUP05 cluster, were also significantly enriched with strong upwelling. Our data provide evidence that alterations to microbial communities in the mixed layer that occur as a result of upwelling could constrain the availability of dissolved thiamin and its chemical congeners in the California Current Ecosystem.","PeriodicalId":18143,"journal":{"name":"Limnology and Oceanography","volume":"94 1","pages":""},"PeriodicalIF":4.5,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143677575","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}