Freshwater Biology最新文献

{"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}

{"title":"Global Expansion of Ponto-Caspian Aquatic Invaders: Drivers, Trends and Taxonomic Biases in a Changing World","authors":"Ismael Soto,&nbsp;Ross N. Cuthbert,&nbsp;Michal Grabowski,&nbsp;Denis Copilaș-Ciocianu,&nbsp;Joanna Grabowska,&nbsp;Karolina Bacela-Spychalska,&nbsp;Tomasz Rewicz,&nbsp;Markéta Ondračková,&nbsp;Yuriy Kvach,&nbsp;Péter Borza,&nbsp;Alexander Y. Karatayev,&nbsp;Lyubov E. Burlakova,&nbsp;Sarah Bailey,&nbsp;Hugh J. MacIsaac,&nbsp;Jaimie T. A. Dick,&nbsp;Antonín Kouba,&nbsp;Phillip J. Haubrock,&nbsp;Elizabeta Briski","doi":"10.1111/fwb.70281","DOIUrl":"https://doi.org/10.1111/fwb.70281","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70281","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148616528","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":"Fungal Strains From Intermittent Streams Contribute More Than Their Perennial Counterparts to Fungal Diversity After Drought Events","authors":"João Martins,&nbsp;Sara Simões,&nbsp;Ricardo Oliveira,&nbsp;Cristina Canhoto","doi":"10.1111/fwb.70290","DOIUrl":"https://doi.org/10.1111/fwb.70290","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Hydrologic intermittency is widespread across lotic ecosystems, and climate change is expected to drive complex, region-specific changes in flow performance, affecting key ecosystem processes such as leaf litter decomposition.</li>\u0000 \u0000 \u0000 <li>In this study we evaluated whether long-term intermittency altered fungal growth rates, fungal-mediated decomposition capacity of leaves and associated descriptors in paired strains of five aquatic hyphomycetes (AH) (<i>Alatospora pulchella, Anguillospora filiformis, Tetrachaetum elegans, Tricladium chaetocladium, Triscelophorus monosporus</i>) collected from an intermittent (<i>I</i>) or perennial (<i>P</i>) stream. All strains, singly or together in <i>I</i> or <i>P</i> assemblages, were subjected to continuous water availability or water-drought-water conditions.</li>\u0000 \u0000 \u0000 <li>Fungal growth was generally higher for <i>P</i> (vs <i>I</i>) strains, suggesting faster substrate colonization strategies compatible with more dynamic flow environments.</li>\u0000 \u0000 \u0000 <li>Drought always compromised the functional ability of AH (exception for <i>A. filiformis, T. chaetocladium</i>), regardless of their <i>P</i> or <i>I</i> origin, but conspecific strains differed in their response and recovery strategies. Intermittent strain communities showed a slower functional recovery after rewetting but a resilient diversity in comparison with the community of <i>P</i> strains. Trade-offs between mass loss and microbial activity likely support desiccation tolerance mechanisms, and in some cases also sporulation, as these were observed in some <i>P</i> strains that demonstrated higher stress tolerance than <i>I</i> strains and communities after the hydric stress period.</li>\u0000 \u0000 \u0000 <li>This study demonstrates that intraspecific variability is crucial for understanding the responses of fungal decomposers to hydrological intermittency. Variation within species may be as relevant as variation between species, particularly under environmental pressure caused by climate change at a global scale.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148616527","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":"Beyond Habitat: How Anuran Skin Texture Shapes Plant Dispersal in Neotropical Wetlands","authors":"Andressa Adolfo,&nbsp;Pedro Hoffmann,&nbsp;Andy J. Green,&nbsp;Milena Rosa Pereira,&nbsp;Leonardo F. B. Moreira,&nbsp;Cristina Stenert,&nbsp;Leonardo Maltchik","doi":"10.1111/fwb.70283","DOIUrl":"https://doi.org/10.1111/fwb.70283","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70283","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148615615","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":"Climate Variation Shapes Freshwater Fish Spatiotemporal β-Diversity Patterns Across Latitudes in Europe","authors":"Siwen He,&nbsp;Yuxin Chen,&nbsp;Chunyan Qin,&nbsp;Janne Soininen","doi":"10.1111/fwb.70287","DOIUrl":"https://doi.org/10.1111/fwb.70287","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Spatial and temporal variations in β-diversity contribute differently to the dynamics of biodiversity, but how these variations relate to climate and latitude remains poorly resolved, especially in freshwater systems, Earth's biodiversity hotspots.</li>\u0000 \u0000 \u0000 <li>We examined the relative rate of freshwater fish spatial and temporal (i–i) β-diversity (<i>β</i>_space/<i>β</i>_time ratio) and (ii–i) climate dissimilarity (CD_space/CD_time ratio) and (i–ii) the relative contribution of <i>β</i>_space (<i>β</i>_space contribution) and <i>β</i>_time to total β-diversity (<i>β</i>_time contribution) and (ii–ii) the relative contribution of CD_space (CD_space contribution) and CD_time to total climate dissimilarity (CD_time contribution) across 73 drainage basins in Europe.</li>\u0000 \u0000 \u0000 <li>We found that (i) both <i>β</i>_space/<i>β</i>_time and CD_space/CD_time ratios formed negative relationships with latitude and were strongly associated with each other, and (ii–i) both <i>β</i>_space and CD_space contributions showed negative relationships with latitude and were strongly associated with each other, and (ii–i) both <i>β</i>_time and CD_time contributions showed positive relationships with latitude and were strongly associated with each other.</li>\u0000 \u0000 \u0000 <li>Our findings suggest that spatiotemporal variation in climate along latitude accounts for the spatiotemporal variation in β-diversity through mediating the strength of species-climate filtering. Our results shed light on latitudinal patterns and drivers of spatiotemporal β-diversity and are useful for the conservation and management of biodiversity undergoing global climate changes.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"71 7","pages":""},"PeriodicalIF":2.6,"publicationDate":"2026-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148615614","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}