Freshwater Biology最新文献

{"title":"Advancing Marker-Gene-Based Methods for Prokaryote-Mediated Multifunctional Redundancy: Exploring Random and Non-Random Extinctions in a Catchment","authors":"Wan-Hsuan Cheng,&nbsp;Takeshi Miki,&nbsp;Motohiro Ido,&nbsp;Kinuyo Yoneya,&nbsp;Kazuaki Matsui,&nbsp;Taichi Yokokawa,&nbsp;Hiroki Yamanaka,&nbsp;Shin-ichi Nakano","doi":"10.1111/fwb.70020","DOIUrl":"https://doi.org/10.1111/fwb.70020","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Multifunctional redundancy, which measures the extent of loss in multiple ecosystem functions with decreasing biodiversity, stands as a crucial index for evaluating ecosystem resilience to environmental changes. Previous studies have assessed functional redundancy by evaluating the overlap in multiple traits or functions among taxonomic units, but quantifying these experimentally for each taxonomic unit is challenging and resource-intensive, especially for microorganisms. In this study, we aimed to refine the estimation of multifunctional redundancy in prokaryotic communities using a marker-gene-based methodology.</li>\u0000 \u0000 \u0000 <li>We used the bioinformatic tool, PICRUSt2, to predict KEGG ortholog (KO) composition for each Amplicon Sequence Variant (ASV) of the 16S rRNA gene and assessed community-wide KO richness as a metric of genomic multifunctionality. Additionally, we introduced a refined regression on KO richness vs. ASV richness curves, providing a reliable estimate of the power-law exponent within computational time constraints, serving as the multifunctional redundancy index. To quantify variations between different species extinction scenarios, we incorporated various non-random extinction scenarios alongside a random one. Finally, to elucidate potential mechanisms contributing to the variations in multifunctional redundancy, we applied our refined methodology to the prokaryote community in Lake Biwa and four of its inlet rivers.</li>\u0000 \u0000 \u0000 <li>Our refined marker-gene-based methodology for quantifying multifunctional redundancy was effectively validated using experimentally quantified phenotypic multifunctionality. Our application to the Lake Biwa catchment revealed spatio-temporal variations in multifunctional redundancy.</li>\u0000 \u0000 \u0000 <li>Our analysis demonstrated lower redundancy in Lake Biwa compared to its inlet rivers, aiding in prioritising conservation targets and inferring distinct community assembly processes.</li>\u0000 \u0000 \u0000 <li>Future directions include a deeper exploration of KO composition information for detailed multifunctionality quantification and the refinement of extinction scenarios. This study demonstrates the promising integration of bioinformatic functional prediction and modelling biodiversity loss, offering a valuable tool for effective ecosystem management.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143632862","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":"Environmental DNA Template Variation: Its Relevance for Species Detection and Conservation","authors":"Sofia Nogueira,&nbsp;Manuel Curto,&nbsp;Diogo Dias,&nbsp;Maria Judite Alves,&nbsp;Susana Dias Amaral,&nbsp;Maria Filomena Magalhães,&nbsp;Carlos Carrapato,&nbsp;Ana Veríssimo,&nbsp;Filipe Ribeiro","doi":"10.1111/fwb.70019","DOIUrl":"https://doi.org/10.1111/fwb.70019","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622480","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":"Comparing Methods for Estimating Geographic Ranges in Freshwater Fishes: Several Mirrors of the Same Reality","authors":"Daniel Valencia-Rodríguez,&nbsp;Fabricio Villalobos,&nbsp;Pablo A. Tedesco,&nbsp;Norman Mercado-Silva,&nbsp;Miguel Rubio-Godoy,&nbsp;Octavio Rojas-Soto","doi":"10.1111/fwb.70014","DOIUrl":"https://doi.org/10.1111/fwb.70014","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;\u0000 \u0000 &lt;/p&gt;&lt;ol&gt;\u0000 \u0000 \u0000 &lt;li&gt;Describing the geographic range of aquatic species is crucial for biodiversity conservation and management. This study comprehensively assesses commonly used methods for constructing geographic ranges and estimating their sizes in freshwater environments, focusing on the Curimatidae family of tropical freshwater fishes distributed in Central and South America. Our main objective was to evaluate different range estimation methods, including convex hull polygons, alpha-shape polygons with a fixed alpha-value, dynamic alpha-shape polygons, expert maps and species distribution models (SDMs).&lt;/li&gt;\u0000 \u0000 \u0000 &lt;li&gt;We used georeferenced data from various sources to delineate species' ranges within their hydrographic basins of occurrence. Geographic ranges for each species were reconstructed using the five methods. For the four polygon methods (i.e., excluding SDMs), two ranges were constructed: (i) polygons considering the whole terrestrial surface (unrestricted) and (ii) polygons considering only freshwater bodies (restricted). Specific environmental variables of freshwater systems were employed for the SDMs. Then, we assessed the differences in range sizes among methods and within each method (excluding SDMs) considering unrestricted and restricted polygons.&lt;/li&gt;\u0000 \u0000 \u0000 &lt;li&gt;Our results revealed significant variations in range size estimates among the methods. Specifically, the convex hull method produced larger range sizes than the other methods. Additionally, our comparison between range size estimates using unrestricted and water body-restricted polygons revealed a consistent trend: unrestricted polygons estimated ranges that were eight times larger than those restricted to water bodies. Moreover, restricting polygons to water bodies resulted in ranges closely matching those estimated by SDMs, indicating the effectiveness of this adjustment procedure.&lt;/li&gt;\u0000 \u0000 \u0000 &lt;li&gt;We highlight the notable variability in range size estimates among different methods, underscoring the need to carefully select the one appropriate for given research goals. For example, expert maps could be helpful for quick assessments of species' distribution and diversity when these are readily available. Convex hulls are suitable for quickly identifying potential conservation areas and assessing the overall species range in biodiversity monitoring. Dynamic alpha is appropriate for species with fragmented distributions, as they can capture discontinuities in range delimitation. Static alpha provides a balanced method for range size estimation when ecological information is limited, offering a practical solution for ecological and conservation assessments. SDMs are ideal for detecting species-environment relationships and identifying unexplored areas where a species might occur. Additionally, adjusti","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143581779","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":"Spatially Diverse Water Levels Enhance Habitat Heterogeneity for Wintering Waterbirds","authors":"Zijian Wang,&nbsp;Jiaying Zhou,&nbsp;Ying He,&nbsp;Yangsirui Zhang,&nbsp;Peizhong Liu,&nbsp;Yifei Jia,&nbsp;Cai Lu,&nbsp;Guangchun Lei","doi":"10.1111/fwb.70016","DOIUrl":"https://doi.org/10.1111/fwb.70016","url":null,"abstract":"<div>\u0000 \u0000 <p>1. Rising global temperatures and the increasing frequency of climate extremes pose significant challenges to waterbird conservation. These effects might be mitigated by managing habitat heterogeneity through diverse water levels in waterbird habitats. East Dongting Lake (EDL), a critical wintering site within the East Asian–Australasian Flyway, has experienced a significant drop in winter water levels due to extreme drought and operation of the Three Gorges Dam. This study aimed to determine optimal water levels for supporting waterbird populations under these changing conditions.</p>\u0000 <p>2. We examined winter waterbird populations at EDL from 2004 to 2021. Species were categorised into five foraging guilds based on established criteria. Environmental variables comprised daily water levels from the Chenglingji hydrological station, meteorological data from ERA5-Land, and the 6-month Standardised Precipitation Evapotranspiration Index (SPEI) for drought severity assessment. We used a generalised additive model (GAM) with a negative binomial distribution to analyse the relationships between waterbird abundance and these factors, applying GAIC-based stepwise selection and varying-coefficient functions to account for guild-specific responses.</p>\u0000 <p>3. In controlled areas of EDL, higher maximum water levels (MaxWL) during the wet season were positively correlated with waterbird abundance, while controlled areas also maintained high waterbird numbers during extreme drought years, providing crucial habitat refuges. In uncontrolled areas, MaxWL and SPEI positively influenced waterbird abundance, while minimum water levels (MinWL) and biological accumulated temperature (BioT) were negatively associated.</p>\u0000 <p>4. In lakes where water levels can be regulated, regulation can be used to maintain habitat heterogeneity and food availability for wintering waterbirds. By adjusting local water management strategies within lake ecosystems, wetland managers can use these findings to support waterbird conservation efforts.</p>\u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571400","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":"Glacier Meltwater Input and Salinity Decline Promote Algal Growth in a Tibetan Saline Lake","authors":"Chenliang Du,&nbsp;Ke Zhang,&nbsp;Qi Lin,&nbsp;Shixin Huang,&nbsp;Yaoyao Han,&nbsp;Ji Shen","doi":"10.1111/fwb.70010","DOIUrl":"https://doi.org/10.1111/fwb.70010","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143564873","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":"Effects of Changing Snow and Ice Cover Conditions on Phytoplankton Chlorophyll-a and Community Composition in a Mesotrophic Lake","authors":"Ellinor Jakobsson,&nbsp;Silke Langenheder,&nbsp;Peter Eklöv,&nbsp;Gesa A. Weyhenmeyer","doi":"10.1111/fwb.70012","DOIUrl":"https://doi.org/10.1111/fwb.70012","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143564823","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":"Hungry Catfish—Effect of Prey Availability on Movement Dynamics of a Top Predator","authors":"Milan Říha,&nbsp;Rubén Rabaneda-Bueno,&nbsp;Lukáš Vejřík,&nbsp;Ivan Jarić,&nbsp;Marie Prchalová,&nbsp;Marek Šmejkal,&nbsp;Martin Čech,&nbsp;Vladislav Draštík,&nbsp;Petr Blabolil,&nbsp;Michaela Holubová,&nbsp;Tomáš Jůza,&nbsp;Karl Ø. Gjelland,&nbsp;Zuzana Sajdlová,&nbsp;Luboš Kočvara,&nbsp;Michal Tušer,&nbsp;Jiří Peterka","doi":"10.1111/fwb.70017","DOIUrl":"https://doi.org/10.1111/fwb.70017","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554513","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":"Norfloxacin Pollution Reshapes Interspecific Relationships in Zooplankton: Impacts of Reduced Phytoplankton Defence and Altered Zooplankton Motility Across Individual, Population and Community Scales","authors":"Changqun Duan,&nbsp;Ruobing Wang,&nbsp;Wenxiang Fang,&nbsp;Ya Li,&nbsp;Dan Liu,&nbsp;Ao Shen,&nbsp;M. D. K. Lakmali Gunathilaka,&nbsp;Ying Pan","doi":"10.1111/fwb.70018","DOIUrl":"https://doi.org/10.1111/fwb.70018","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Recent studies indicate that antibiotics can inhibit the formation of phytoplankton colonies. This may affect zooplankton of varying sizes differently, potentially altering interspecific competition.</li>\u0000 \u0000 \u0000 <li>To investigate these effects, we established resource (predator-free) and apparent competition (with a larval damselfly as predator) systems by co-culturing <i>Daphnia magna</i> and <i>Moina affinis</i> with the algae <i>Scenedesmus quadricauda</i> as food. We examined the effects of norfloxacin (NOR, 0, 31.25, 500 and 8000 μg L⁻¹) on the colony formation of <i>S. quadricauda</i> and on both individual- and population-level traits of zooplankton, along with interspecific competitive dynamics.</li>\u0000 \u0000 \u0000 <li>NOR impaired the ability of <i>S. quadricauda</i> to form large colonies, increasing grazing rates and boosting population expansion of both grazer species, particularly enhancing the competitive advantage of the smaller species, <i>M. affinis</i>, in the resource competition system. However, NOR caused oxidative damage and reduced mobility, which impacted <i>M. affinis</i> more severely, increasing its predation risk by damselfly larvae and reducing its dominance in the apparent competition system.</li>\u0000 \u0000 \u0000 <li>Our findings indicate that zooplankton interspecies competition is highly sensitive to antibiotic contamination. Moreover, the combined effects of differences in individual body size and sensitivity determine the potential hazards antibiotics pose to zooplankton communities, highlighting the need for concern.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554512","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.14268","DOIUrl":"https://doi.org/10.1111/fwb.14268","url":null,"abstract":"","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.14268","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535737","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":"Drought-Induced Decreases in Abundance of Emergent Midge Subsidies Are Offset by Increased Body Size in a Prairie Stream","authors":"Adam C. Siders,&nbsp;Garrett W. Hopper,&nbsp;Matt R. Whiles,&nbsp;Alexander J. Reisinger,&nbsp;Keith B. Gido","doi":"10.1111/fwb.70011","DOIUrl":"https://doi.org/10.1111/fwb.70011","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Emerging aquatic insects can be an important resource subsidy for a variety of terrestrial consumers, including spiders, birds, bats and lizards. Emergence flux is influenced by a variety of abiotic and biotic variables, such as temperature, drying, and predators and these variables can also control the body size of emergent insects. Despite their importance, these variables can change rapidly during drought conditions as water temperatures rise, surface area decreases and predator densities increase.</li>\u0000 \u0000 \u0000 <li>During 2018, the Konza Prairie Biological Station experienced a record drought: flow ceased in the lower reaches of Kings Creek for the first time in over 40 years of observation, leaving a series of isolated pools. We studied how the drought affected aquatic insect emergence in 12 of these pools via elevated temperatures, decreased surface area, and concentration of predators (e.g. fishes and crayfish) over a four-week period. We returned in 2020 and sampled emergence in the same pools over 2 weeks under non-drought conditions to compare emergence between drought and non-drought conditions.</li>\u0000 \u0000 \u0000 <li>We found three overall patterns: (1) rates of areal emergence abundance and biomass (number or mg DM m⁻² d⁻¹) did not differ between drought and non-drought conditions. In contrast, pool-scale emergence abundance, but not biomass (number or mg DM pool⁻¹ d⁻¹), was lower during drought conditions; (2) average midge body size was larger during the drought relative to the non-drought conditions; (3) environmental variables (e.g. temperature, pool surface area, predator biomass) were not predictive of emergence during drought and non-drought conditions.</li>\u0000 \u0000 \u0000 <li>Fewer, but larger emergent midges (as seen under drought conditions) may represent a higher quality resource for terrestrial consumers than many smaller midges due to increased per-capita energy yield. However, due to the overall decrease in water availability throughout the stream network, the overall emergence flux was concentrated in reaches with remaining water during the drought, making pools emergence subsidy hotspots. Overall, these contrasting responses underscore the complex nature of community responses to shifting climatic conditions.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 2","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471918","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}