Freshwater Biology最新文献

{"title":"The Role of Host Age at Exposure, Host–Parasite Genetics and Host Size-Parasite Length Mechanics in Shaping the Outcome of Parasitic Infections in Three Zooplankton Taxa","authors":"Sabrina Gattis,&nbsp;Frida Ben-Ami","doi":"10.1111/fwb.70086","DOIUrl":"https://doi.org/10.1111/fwb.70086","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70086","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144885104","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":"High Altitudes as Reservoirs of Unique Genetic Diversity: A Case Study on Aquatic Beetles in Glacial Lakes of Tatra Mountains","authors":"Patrik Macko,&nbsp;Fedor Čiampor Jr,&nbsp;Michaela Šamulková,&nbsp;Ondrej Vargovčík,&nbsp;Kornélia Tuhrinová,&nbsp;Zuzana Čiamporová-Zaťovičová","doi":"10.1111/fwb.70083","DOIUrl":"https://doi.org/10.1111/fwb.70083","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;Mountains play a crucial role in global biodiversity, serving as refugia for many endemic and endangered species. This extends to high-altitude freshwater habitats, such as glacial lakes and ponds, which support unique communities of cold-adapted invertebrates. However, their remoteness, short ice-free periods and difficult accessibility pose challenges for research, leaving key ecosystem aspects poorly understood. This is particularly true for population genetic diversity and structure, which are essential for developing effective conservation strategies, especially in the context of climate change adaptation and biodiversity preservation. This study aims to (i) assess the community composition and genetic diversity and structure of aquatic beetles in the (sub)alpine lakes and ponds of the Tatra Mountains, (ii) compare these populations with conspecifics from lower elevations and (iii) evaluate the role of this mountain system in maintaining unique genetic diversity.&lt;/li&gt;\u0000 \u0000 \u0000 &lt;li&gt;Macroinvertebrate samples were collected from 215 sites, and a target barcoding fragment was amplified from ~500 aquatic beetles. Furthermore, our dataset was expanded with &gt; 1700 sequences from the BOLD database (Barcode of Life Data Systems) and used for species delimitation with RESL, ASAP and mPTP, as well as for assessing key genetic parameters, including haplotype and nucleotide diversity, intraspecific variation and genetic differentiation. Phylogenetic relationships among haplotypes recorded within the study area were inferred using maximum likelihood analyses, and time-calibrated Bayesian phylogenies were conducted to assess cryptic taxa.&lt;/li&gt;\u0000 \u0000 \u0000 &lt;li&gt;Aquatic beetles were recorded at 106 sites, yielding 387 DNA barcodes and identifying 68 species from 27 genera and eight families. Of these, 29 species were newly recorded in the region. The expanded dataset comprised 657 haplotypes representing 106 BINs (barcode index numbers), with species delimitation yielding 81 (ASAP) and 92 (mPTP) MOTUs (molecular operational taxonomic units). For species recorded in the Tatra Mountains, approximately 75% of their globally recognised BINs/MOTUs were also present within the region, and three Linnean species were confirmed to include cryptic complexes likely originating in the Pleistocene. Notably, 68% of the 179 haplotypes found in the studied area were unique to this region, with significant genetic differentiation from non-Tatra populations, as shown by AMOVA analyses.&lt;/li&gt;\u0000 \u0000 \u0000 &lt;li&gt;The study demonstrates that highly diverse (sub)alpine lakes distributed in a geographically small area can harbour substantial species and genetic diversity and serve as important reservoirs of unique genetic diversity. These lakes likely also act as secondary contact sites for the cryptic comp","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144885068","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":"Biodiversity and Community Assembly of Endorheic Rivers on Earth's Largest Plateau","authors":"Xiu Feng,&nbsp;Kai Chen,&nbsp;Ren Zhu,&nbsp;Yintao Jia,&nbsp;Xiaoyun Sui,&nbsp;Xiong Xiong,&nbsp;Huan Zhu,&nbsp;Bing Li,&nbsp;Huanhuan Sun,&nbsp;Tong Mu,&nbsp;Chuanqi Jiang,&nbsp;Wei Miao,&nbsp;Yifeng Chen","doi":"10.1111/fwb.70087","DOIUrl":"https://doi.org/10.1111/fwb.70087","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Understanding biodiversity distribution patterns and related environmental factors and community assembly mechanisms is crucial for deciphering community responses and feedback to global changes, but it remains largely unknown in aquatic ecosystems on the Qinghai-Tibet Plateau (QTP) which is the Asian water tower and one of the regions most severely affected by climate changes.</li>\u0000 \u0000 \u0000 <li>Here, by analysing environmental DNA metagenomic and metabarcoding sequencing data of water samples from the ice margin to the lake along two endorheic rivers (Tsachu Tsangpo and Bochu Tsangpo) on the QTP, we examined the alpha and beta diversity and the ecological processes driving community assembly of various taxonomic groups (bacteria, fungi, eukaryotic algae, protozoa, metazoan invertebrates and vertebrates).</li>\u0000 \u0000 \u0000 <li>We found no significant continuous change in alpha diversity from the ice margin to lake along the two rivers for most taxonomic groups, except for fungi in Tsachu Tsangpo, which showed a gradual decline. Alpha diversity was significantly correlated with various environmental factor, including total nitrogen and ammonium nitrogen for bacteria, turbidity for fungi, total phosphorus and nitrate nitrogen for eukaryotic algae, chloride ion for protozoa and total phosphorus for metazoan invertebrates. Community compositions of these taxonomic groups were significantly correlated to similar environmental factors, such as water temperature, turbidity, nitrate nitrogen, and total organic carbon.</li>\u0000 \u0000 \u0000 <li>Furthermore, homogeneous selection, dispersal limitation and drift mainly contributed to the community assembly in both rivers, with a higher importance of deterministic processes and lower importance of stochastic processes for bacteria, eukaryotic algae and protozoa than for metazoan invertebrates and fungi.</li>\u0000 \u0000 \u0000 <li>The results demonstrated various environmental factors correlated with the alpha and beta diversity of multi-taxonomic groups in the two endorheic rivers. Deterministic processes were more prominent in the community assembly of bacteria, eukaryotic algae and protozoa than in metazoan invertebrates and fungi. These findings would help to understand how aquatic organisms on the QTP respond to climate change.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869143","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":"Response of Pond Food Webs to Anthropogenic Habitat Degradation","authors":"Noelia Gobel,&nbsp;Gabriel Laufer,&nbsp;Matías Arim,&nbsp;Iván González-Bergonzoni","doi":"10.1111/fwb.70088","DOIUrl":"https://doi.org/10.1111/fwb.70088","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>In the context of the Anthropocene, it is crucial to understand how habitat degradation and species loss alter the structure and functioning of ecological communities. Using a pondscape within the Pampas Biome as a study model, we analysed the impact of agricultural intensification on the taxonomic and trophic assemblage of pond communities.</li>\u0000 \u0000 \u0000 <li>We sampled ponds in landscapes of natural grasslands, artificial grasslands, and crop fields. Using a multitrophic approach that included zooplankton, macroinvertebrates, fish, and amphibians, we evaluated taxonomic richness, assemblage abundance, and food web structure. The trophic niche structure, energy pathways, and network topology were inferred from stable isotopes and stomach content.</li>\u0000 \u0000 \u0000 <li>Ponds in crop fields exhibited lower species richness, with significant decreases in the abundance of tadpoles, fish, and predatory macroinvertebrates, and increases in scrapers and filter-feeding macroinvertebrates indicating a severe impact of agriculture. These ponds also showed more diversity in basal resources and trophic positions but reduced trophic redundancy. Although no changes in the relative importance of trophic pathways were detected, we observed fewer primary consumers subsidised by detritus in crop-affected systems. The ponds in artificial grassland exhibited fewer alterations than those in crop fields, where environmental disruption is greater.</li>\u0000 \u0000 \u0000 <li>This study shows how land use impacts aquatic ecosystems, leading to loss of biodiversity and functional disruptions, and underscores the vulnerability of certain species and interactions to agricultural intensification.</li>\u0000 \u0000 \u0000 <li>We highlight the urgent need for targeted management to mitigate these consequences for ecosystem resilience and services, safeguard biodiversity, and preserve ecosystem functions in agricultural landscapes.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869729","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":"A Comprehensive Assessment of Heavy Metal Contamination in Chinese Lake Sediments and Submerged Macrophyte Responses: Multi-Scale Impacts, Accumulation Capacity and Tolerance Mechanisms","authors":"Shijie Xie,&nbsp;Song Peng,&nbsp;Yifan Wei,&nbsp;Wenxiang Fang,&nbsp;Shili Shen,&nbsp;Changqun Duan,&nbsp;Torben Linding Lauridsen,&nbsp;Erik Jeppesen,&nbsp;Ying Pan","doi":"10.1111/fwb.70082","DOIUrl":"https://doi.org/10.1111/fwb.70082","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70082","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869762","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":"Fish Diversity and Water Quality in Streams of the Andean-Amazonian Transition Zone Reflect Local Land Cover Rather Than Upstream Conditions","authors":"Juan David Bogotá-Gregory,&nbsp;Leo Ohyama,&nbsp;Astrid Acosta-Santos,&nbsp;Edwin Agudelo Córdoba,&nbsp;David G. Jenkins","doi":"10.1111/fwb.70084","DOIUrl":"https://doi.org/10.1111/fwb.70084","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Landscapes are heavily influenced by anthropogenic activities, affecting land cover at different scales. Anthropogenic land cover affects downstream aquatic communities in the catchment area via runoff, often reducing diversity. Some landscapes are yet to be strongly influenced, such as where armed conflict has prevented human activities. Land cover in these areas may affect aquatic communities differently and serve as a reference for subsequent changes in land use.</li>\u0000 \u0000 \u0000 <li>We sampled fishes and water temperature, pH, conductivity, and dissolved oxygen at 25 localities from the lightly influenced Andean-Amazonian transition zone in Colombia when armed conflict ended. We used multivariate analysis to infer the effects of land cover on fish and water quality at three local scales (100, 500, and 1000 m radii) relative to upstream catchment land cover. We also evaluated predictors of species richness, effective diversity, and local contribution to β diversity via regressions.</li>\u0000 \u0000 \u0000 <li>Local land cover predicted fish assemblages and water quality in the relatively pristine catchment areas better than upstream catchment land cover. We provided support that local drivers of fish assemblages and water quality become dominated by anthropogenic landscape effects upstream, and the shift may be a sensitive, early indicator of anthropogenic land use on streams. Both water quality and fish assemblages showed highest local correlation with 1000 m buffers over the 100 m and 500 m buffers.</li>\u0000 \u0000 \u0000 <li>Our study represents a baseline for evaluating the effects of anthropogenic activities on relatively conserved streams. The streams from our study system serve as a model for other tropical and subtropical areas at risk of habitat transformation and degradation due to anthropogenic activities.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869730","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":"Inter-Period and Inter-Season Variability of Zooplankton of a Mountain Lake With an Emphasis on Under-Ice Communities","authors":"Ulrike Obertegger,&nbsp;Stefano Corradini,&nbsp;Leonardo Cerasino","doi":"10.1111/fwb.70085","DOIUrl":"https://doi.org/10.1111/fwb.70085","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.70085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144861914","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":"Large-Scale eDNA Sampling and Hierarchical Modelling Elucidates the Importance of Stream Habitat for Eastern Hellbender (Cryptobranchus a. alleganiensis) Occupancy and eDNA Detection","authors":"Sarah A. Tomke,&nbsp;Steven J. Price","doi":"10.1111/fwb.70079","DOIUrl":"https://doi.org/10.1111/fwb.70079","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Accurate detection data are imperative to assess distributions and habitat-associations for species of conservation need. Environmental DNA (eDNA) sampling is an effective tool to obtain detection data across large geographic scales; however, most eDNA studies do not account for environmental variation that could influence detection. Hierarchical modelling can be used to identify factors important to species occurrence while accounting for such factors.</li>\u0000 \u0000 \u0000 <li>Local extirpations and significant population declines have been documented across the range of the Eastern Hellbender (<i>Cryptobranchus alleganiensis alleganiensis</i>) due to water quality and habitat degradation, but a paucity of information on the current distribution and status of hellbenders remains for certain regions. We conducted a state-wide eDNA survey to (1) investigate the current distribution of hellbenders in Kentucky, a state which lacks extensive hellbender occurrence information, (2) evaluate habitat associations for hellbenders in this region and (3) identify environmental factors that influence eDNA detection.</li>\u0000 \u0000 \u0000 <li>Environmental DNA samples, water chemistry and habitat data were collected from 90 sites state-wide, 27 of which had historic records. We ran multiscale Bayesian occupancy models to determine occupancy and detection probabilities at each site, and to identify water chemistry, local habitat and landscape factors associated with hellbender occupancy and eDNA detection.</li>\u0000 \u0000 \u0000 <li>Hellbender eDNA was detected at 22 sites total, including 12 (44%) historic locations. We found that total organic carbon in the stream significantly hindered eDNA detection and that local habitat quality was more important for hellbender presence than water chemistry or upstream catchment land cover. Hellbender occupancy was positively associated with the percent cobble, gravel and bedrock in the streambed and stream order, and negatively associated with the percent fine sediment in the streambed.</li>\u0000 \u0000 \u0000 <li>Our results indicate that hellbender populations have significantly declined in Kentucky, and the quality of available stream substrate is critical for hellbender presence. This study demonstrates that by applying hierarchical modelling to large-scale eDNA sampling, we were able to make robust inferences about factors associated with hellbender occurrence and eDNA detection.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832848","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":"Long-Term Boat Noise Effects on Growth and Behavioural Patterns During Early Life Stages of the African Cichlid Maylandia zebra","authors":"Wenjing Wang,&nbsp;Théophile Turco,&nbsp;Aurélie Pradeau,&nbsp;Paulo J. Fonseca,&nbsp;Raquel O. Vasconcelos,&nbsp;Maria Clara P. Amorim,&nbsp;Gérard Coureaud,&nbsp;Marilyn Beauchaud","doi":"10.1111/fwb.70077","DOIUrl":"https://doi.org/10.1111/fwb.70077","url":null,"abstract":"<div>\u0000 \u0000 <p>\u0000 \u0000 </p><ol>\u0000 \u0000 \u0000 <li>Underwater anthropogenic noise is currently recognised as a global environmental pollutant, with negative impacts on the behaviour and physiology of a wide range of aquatic animals. However, long-term studies on the effects of chronic exposure to anthropogenic noise on fish are lacking, especially regarding early life stages.</li>\u0000 \u0000 \u0000 <li>Here, we focused on a well-known fish behavioural model, the cichlid fish <i>Maylandia zebra</i>, to assess the effects of boat noise on early life stages over 12 weeks. To minimise potential genetic effects, a split-brood approach was employed, with half of each female's offspring exposed to control treatment (100 dB re. 1 μPa), while the other half was subjected to boat noise treatment (120 dB re. 1 μPa). Subsequently, we closely monitored weekly changes in growth and behaviour, including foraging, territorial behaviour, swimming, and group cohesion.</li>\u0000 \u0000 \u0000 <li>We found that juveniles exposed to boat noise exhibited increased foraging activity and swimming distance, stayed closer to the water surface, and showed reduced digging behaviour, shelter use, and group cohesion compared to control juveniles. However, at the end of the experiment, there were no differences between treatment and control fish in any measured variable, suggesting habituation to noise.</li>\u0000 \u0000 \u0000 <li>Our findings suggest that long-term boat noise affects a suite of behaviours during development that appear to change in concert—likely by the need to maintain an energy balance—and differ from those observed under short-term noise exposure. These changes could pose unpredictable risks in the wild, especially before habituation occurs.</li>\u0000 </ol>\u0000 \u0000 </div>","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 8","pages":""},"PeriodicalIF":2.7,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767894","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.14278","DOIUrl":"https://doi.org/10.1111/fwb.14278","url":null,"abstract":"","PeriodicalId":12365,"journal":{"name":"Freshwater Biology","volume":"70 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fwb.14278","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716954","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}