Freshwater Biology最新文献

{"title":"Calcium Concentration Regulates Interspecific Interaction of Algae Along the Nutrient Gradient","authors":"QingShi Zhou,&nbsp;ZhanPeng Pan,&nbsp;XinYi Li,&nbsp;Yang Gao","doi":"10.1111/fwb.70282","DOIUrl":"https://doi.org/10.1111/fwb.70282","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Although many studies have focused on the influence of abiotic stress gradients on biological interactions, few have examined the effects of both resource and non-resource stresses on facilitation.</li>\u0000 \u0000 \u0000 <li>We conducted a controlled experiment to study the effects of nutrient stress on the interspecific interaction between <i>Phormidium corium</i> and <i>Scenedesmus quadricauda</i> along calcium gradient.</li>\u0000 \u0000 \u0000 <li>The results showed that elevated calcium concentration changed the interspecific relationship among algae with nutrient stress. When the calcium stress was low, the relationship between <i>P. corium</i> and <i>S. quadricauda</i> changed from competition to facilitation with the increase of nutrient stress gradient. In a nutrient-stress environment, the population density and the encounter rate are typically low. Facilitation improves these harsh environments and makes them more beneficial for the beneficiary species.</li>\u0000 \u0000 \u0000 <li>When the calcium stress was high, facilitation peaked under medium resource stress. This phenomenon may be caused by the interaction between salt stress and nutrients. High calcium stress is conducive to the absorption of nutrients by algae. The facilitation effect is strongest in a medium calcium stress environment owing to relatively sufficient resources.</li>\u0000 \u0000 \u0000 <li>These results emphasize the importance of non-resource stress in interspecific relationships, highlight a new direction for the study of facilitation, and provide theoretical guidance for studying the influencing factors of algal competition.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148754161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nitrogen and Phosphorus Controls on Phytoplankton Growth and Bacterioplankton Communities in Wetland Impoundments","authors":"Rachel. L. Wood,&nbsp;Jakob L. Young,&nbsp;Madeleine P. Malmfeldt,&nbsp;Adam J. Norris,&nbsp;Zachary T. Aanderud,&nbsp;Michelle A. Baker","doi":"10.1111/fwb.70295","DOIUrl":"https://doi.org/10.1111/fwb.70295","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70295","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Landscape and Hydro-Climatic Drivers of Fish Communities in Floodplain Wetlands","authors":"Saúl González-Murcia,&nbsp;Samuel Lewis,&nbsp;Sally Maxwell,&nbsp;Luke McPhan,&nbsp;Michael Shackleton,&nbsp;Nick Bond","doi":"10.1111/fwb.70293","DOIUrl":"https://doi.org/10.1111/fwb.70293","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70293","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temporal and Ecological Factors Influencing Aquatic Hyphomycetes in a Tropical Headwater Stream","authors":"Edson Serafim de Almeida Júnior,&nbsp;Renan de Souza Rezende,&nbsp;José Francisco Gonçalves-Júnior,&nbsp;Keisla Silva Batista de Oliveira,&nbsp;Daniela Mariano Lopes da Silva,&nbsp;Guilherme Pereira da Silva Sena,&nbsp;Jéssica Carneiro de Souza,&nbsp;Adriana Oliveira Medeiros","doi":"10.1111/fwb.70288","DOIUrl":"https://doi.org/10.1111/fwb.70288","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70288","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flow-Regulated Migration Phenology of Potamodromous Fishes in a Large Regulated Australian River","authors":"Ivor G. Stuart,&nbsp;Jason D. Thiem,&nbsp;Benjamin G. Fanson","doi":"10.1111/fwb.70292","DOIUrl":"https://doi.org/10.1111/fwb.70292","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70292","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental and Spatial Structuring of Aquatic Macrophyte Metacommunities Across River Networks and Associated Freshwater Systems","authors":"Dragana Vukov,&nbsp;Mirjana Ćuk,&nbsp;Miloš Ilić","doi":"10.1111/fwb.70294","DOIUrl":"https://doi.org/10.1111/fwb.70294","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Aquatic macrophytes are key structural and functional components of freshwater ecosystems, yet the processes shaping their community composition across spatial scales remain incompletely understood. Less attention has been paid to macrophyte metacommunity organisation across heterogeneous freshwater landscapes composing both lotic and lentic system types. Here, we investigate how environmental filtering and spatial structuring are jointly associated with aquatic macrophyte community composition within a regional metacommunity context.</li>\u0000 \u0000 \u0000 <li>Using abundance-based community data from a nationwide freshwater network encompassing lotic and lentic systems, we analysed macrophyte assemblages using non-metric multidimensional scaling (NMDS), distance decay relationships, variation partitioning, beta diversity decomposition, and local contribution to beta diversity (LCBD).</li>\u0000 \u0000 \u0000 <li>Macrophyte communities exhibited continuous compositional variation, with substantial overlap among freshwater ecosystem types. Community similarity declined significantly with increasing geographic distance, with steeper distance decay relationships observed in lotic systems than in reservoirs, indicating stronger spatial structuring within river networks. Beta diversity was high and dominated by species turnover rather than nestedness, with nearly complete turnover in lotic systems and a modest nestedness component in reservoirs. LCBD analysis identified spatially widespread sites contributing disproportionately to regional compositional heterogeneity.</li>\u0000 \u0000 \u0000 <li>Together, these results indicate that aquatic macrophyte metacommunities are associated with both environmental heterogeneity and spatial structuring, rather than being explained by a single dominant process. Differences among freshwater ecosystem types are likely linked to contrasts in hydrological connectivity, environmental gradients, and landscape configuration.</li>\u0000 \u0000 \u0000 <li>By examining rivers, reservoirs, and natural lakes within a single regional framework, this study highlights how hydrological context influences spatial structuring and compositional turnover in aquatic macrophyte communities and demonstrates the value of large-scale monitoring networks for metacommunity research.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148617391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Do Inter-Basin Water Transfer Schemes Facilitate the Dispersal of Freshwater Crabs Across Catchments? A Genetic Case Study From the Eastern Cape, South Africa","authors":"Gavin Gouws,&nbsp;Albert Chakona,&nbsp;Jana Nadermann,&nbsp;Melissa B. Martin,&nbsp;Nigel P. Barker","doi":"10.1111/fwb.70285","DOIUrl":"https://doi.org/10.1111/fwb.70285","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>The impacts of inter-basin water transfer schemes (IBWTs) are well-understood globally. In South Africa, changes caused by the connection of the Orange, Great Fish and Sundays rivers have been studied, but evidence of inter-basin dispersal is restricted to freshwater fishes. This study investigated whether IBWTs provided conduits for the dispersal of freshwater crabs (genus <i>Potamonautes</i>) across catchment divisions.</li>\u0000 \u0000 \u0000 <li>Crabs were sampled from ten locations, representing upstream, putatively native populations from the three catchments and downstream (potential recipient) populations. Mitochondrial DNA sequence data (from the protein-coding cytochrome <i>c</i> oxidase subunit I and non-coding 16S rRNA regions) and microsatellite genotype data were analysed to identify catchment-specific lineages and potentially admixed populations, indicating movement among catchments.</li>\u0000 \u0000 \u0000 <li>Genetically distinct populations of <i>Potamonautes</i> were identified in each catchment, and there was no evidence of admixture or catchment-lineage discordance to suggest translocation or gene flow among catchments.</li>\u0000 \u0000 \u0000 <li>These results show a lack of inter-basin dispersal and indicate that human-made connections do not facilitate crab dispersal. In contrast, ecological differences, such as habitat preferences and feeding ecology, may predispose other groups, such as certain freshwater fishes, to migrate through these connections.</li>\u0000 \u0000 \u0000 <li>This study highlights the importance of understanding species-specific responses when evaluating the potential impact of IBWT schemes, and underscores the need for further research on the movement ecology of African freshwater crabs.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148617346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantifying Colonisation Pressure as a Driver of Secondary Spread During the Dreissena polymorpha Invasion of German River Networks","authors":"Phillip J. Haubrock,&nbsp;Ismael Soto,&nbsp;Ronaldo Sousa,&nbsp;J. Robert Britton","doi":"10.1111/fwb.70289","DOIUrl":"https://doi.org/10.1111/fwb.70289","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70289","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148617343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Leaf Stoichiometry and Edaphic Properties Jointly Shape Plant Nutrient Resorption in a Riparian Wetland Undergoing Water Table Fluctuations","authors":"Baoyi Wang,&nbsp;Chaohe Huangfu","doi":"10.1111/fwb.70286","DOIUrl":"https://doi.org/10.1111/fwb.70286","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Variations in traits of plant leaves and roots affect both above-ground and below-ground resource exploitation strategies. However, little is known about the drivers of such variation in riparian wetlands undergoing water table fluctuation.</li>\u0000 \u0000 \u0000 <li>We examined the links between strategies for nutrient conservation in leaves and nutrient acquisition by roots for two dominant species, <i>Carex thunbergii</i> and <i>Phalaris arundinacea</i> along a hydrological gradient. These linkages were assessed using a series of variables: (1) the N and P resorption efficiency of leaves, (2) nutrient acquisition-related root and leaf morphological properties.</li>\u0000 \u0000 \u0000 <li>We found that N resorption efficiency increases with increasing water table level, while P resorption efficiency was static for both species across different soil water conditions. Specifically, in <i>C. thunbergii</i>, we found a positive relationship between N conservation in above-ground tissues and the below-ground rate of nutrient acquisition that was driven by water table-related variation in the leaf N content and the soil NH₄⁺/NO₃⁻ ratio. Conversely, for <i>P. arundinacea</i>, its root traits shifted from conservation to acquisitive strategy along the hydrological gradient, coinciding with a shift in leaf strategies from conservation to acquisition, with higher leaf N at higher water table levels. The association of P and N resorption efficiencies with the N to P ratio in leaves in <i>P. arundinacea</i> suggested that resorption of nutrients responded to nutrient stoichiometry.</li>\u0000 \u0000 \u0000 <li>We suggest that the characteristics of plant nutrient resorption are species-specific and that the nutrient preferences of roots influence the nutrient availability in above-ground tissues in this subtropical wetland ecosystem.</li>\u0000 \u0000 \u0000 <li>Our study provides important insights into the nutrient balance and adaptation strategies of plants and helps us predict nutrient cycling under climate change in wetland ecosystems.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148617217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Issue Information - Cover and Ed Board","authors":"","doi":"10.1111/fwb.70239","DOIUrl":"https://doi.org/10.1111/fwb.70239","url":null,"abstract":"","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 8","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70239","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148617218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}