Aquatic Sciences最新文献

{"title":"Siliceous microfossils in the surface sediments of the eastern Arabian Sea","authors":"Rahul Khichi,&nbsp;Suhas Shetye,&nbsp;Siby Kurian","doi":"10.1007/s00027-025-01178-y","DOIUrl":"10.1007/s00027-025-01178-y","url":null,"abstract":"<div><p>The global oceanic silica cycle is regulated by siliceous plankton such as diatoms, radiolarians, and silicoflagellates. Among these, diatoms play a major role in oceanic CO₂ sequestration as they are abundant in most oceanic regions. We studied the biogenic silica (BSi) and siliceous microfossil assemblages in the surface sediments of the eastern Arabian Sea. The BSi content ranged from 1.87 to 8.51% and the major contributors to it were diatoms, sponges (their spicules) and radiolarians, with minor contributions from silicoflagellates and siliceous dinoflagellates. The abundances of diatoms and sponge spicules showed a strong positive correlation with BSi and a negative correlation with sediment grain size. Our results indicated a high abundance of diatoms in the nutrient-rich coastal sediments, while the radiolarian contribution to BSi was high in offshore oligotrophic regions. Diatom abundance showed large spatial variation, and ranged from 0.69 × 10⁴ to 1.85 × 10⁶ valves/g. The diatom assemblages in the surface sediments differed significantly from those reported for the water column. The results of this study are considered to be of particular significance with respect to ongoing effects of climate change that already pose a threat to the Arabian Sea, such as silicate limitation and ocean acidification.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production of dissolved organic matter from lily pads (Nymphaea odorata) in a mesotrophic freshwater lake","authors":"Kyle Juetten,&nbsp;Warren J. De Bruyn,&nbsp;Zachary Landram,&nbsp;Caleb D. R. Jansen,&nbsp;Aaron W. Harrison,&nbsp;Angela Strecker,&nbsp;Catherine D. Clark","doi":"10.1007/s00027-025-01180-4","DOIUrl":"10.1007/s00027-025-01180-4","url":null,"abstract":"<div><p>Macrophytes are potentially an important dissolved organic matter (DOM) source in lakes. To assess the effect of lily pads (<i>Nymphaea odorata</i>) on DOM, optical properties and dissolved organic carbon concentrations (DOC) were measured over a year in Lake Louise, Pacific Northwest, USA. Lily pads were widespread around the shoreline during summer, dying back in the fall. Some optical indices (slope ratio, index of recent autochthonous contribution, fluorescence index) indicated the lake was dominated by DOM from terrestrial sources for most of the year. Indicators of autochthonous production in a few winter samples were attributed to phytoplankton. DOC concentrations and precipitation were not correlated, but DOC was positively correlated with absorption coefficient at 350 nm (<i>α</i>₃₅₀). DOC and <i>α</i>₃₅₀ were highest in summer and decreased in the winter wet season, which would be consistent with an in situ lake source being diluted by rainfall as a possible explanation for this. Excitation-emission matrix fluorescence spectra of lake waters and lily pad leachates indicated humic and protein material components. The plant leachates had slope ratio, fluorescence index, and index of recent autochthonous contribution values consistent with terrestrially derived DOM and lake waters. Higher DOC and <i>α</i>₃₅₀ in the summer were associated with some lower optical indices (specific ultra-violet absorbance, spectral slope, humification index, fluorescence/absorbance ratio ratios), consistent with material derived from lily pads. Estimates indicated lily pads contributed as much to the lake DOM pool in the summer dry season as watershed terrestrial inputs in the winter wet season, suggesting that DOM production by lily pads may account for a significant portion of the carbon pool in smaller lakes.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the use of a freshwater protected area by northern pike (Esox lucius) in a large temperate lake system","authors":"Jordanna N. Bergman,&nbsp;Chantal Vis,&nbsp;Valerie Minelga,&nbsp;Joseph R. Bennett,&nbsp;Steven J. Cooke","doi":"10.1007/s00027-025-01182-2","DOIUrl":"10.1007/s00027-025-01182-2","url":null,"abstract":"<div><p>Freshwater fish populations, especially migratory species and those with larger home ranges, are declining worldwide as a result of numerous direct and indirect anthropogenic factors. Freshwater protected areas (FPAs) are an emerging conservation tool that could help mitigate freshwater biodiversity losses by offering areas within freshwater ecosystems that provide full protection to species and the critical habitats they rely on. Using acoustic telemetry, we evaluated the use of a shallow, heavily vegetated FPA by northern pike (<i>Esox lucius</i>; <i>N</i> = 29) in a large temperate lake system in Ontario, Canada from 2019 to 2021. Receivers were deployed within the FPA, in the waters adjacent to but outside of the FPA (the “boundary area”), and throughout the open-area lake basins further from the FPA. Telemetry data revealed that 46% of fish captured and released in the FPA departed and did not return (<i>N</i> = 6), while the remaining 54% exhibited fidelity (<i>N</i> = 7). Notably, northern pike spent a significant portion of time in the boundary area, potentially because it contains deeper waters (maximum 12 m) that may offer thermal refuge or transitional space for movements to the lake’s deep main basin (max 95 m). Additionally, three northern pike that were captured and released in the lake’s main basin were detected inside the boundary area; however, their use of the FPA was minimal. Our findings underscore the importance of considering habitat requirements and movement ecology of species to inform effective FPA design and identify opportunities to enhance conservation benefits provided by these areas for mobile species.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143769868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Artificial intelligence as an ally to assess and manage the golden mussel (Limnoperna fortunei (Dunker, 1857)) bioinvasion","authors":"Humberto F. M. Fortunato,&nbsp;Raquel M. A. Figueira,&nbsp;Ronny F. M. de Souza,&nbsp;Nelson Theodoro Junior,&nbsp;Victor B. B. Mello","doi":"10.1007/s00027-025-01177-z","DOIUrl":"10.1007/s00027-025-01177-z","url":null,"abstract":"<div><p>Invasion of the golden mussel (<i>Limnoperna fortunei</i>) into Brazilian watersheds is still impacting energy production and aquaculture after 30 years of establishment. No control attempts have been effective and even monitoring is limited by costs and accessibility to the areas. In this context, we propose an approach that integrates traditional monitoring tools with an artificial intelligence (AI) program developed using convolutional neural networks (CNN), with the aim to identify and quantify golden mussels in two Brazilian watersheds, Paraná and São Francisco. In the latter, we conducted an additional 7-month temporal evaluation using recruitment plates. Neural networks can assist in species identification in complex environments, facilitating population monitoring and biodiversity assessment. In our study, the AI program had 85–98% accuracy compared to human measurements, demonstrating a high success rate for autonomous assessment. Independent of individual mussel size, the best feature for golden mussel detection was valve aperture. This study provides a valuable quantitative and methodological baseline regarding golden mussel infestation in Brazil, highlighting the efficiency and cost-effectiveness of the AI program for monitoring this invasive species. This technique is easily replicable and scalable, with a great potential to facilitate the work of researchers and environmental agencies worldwide as an additional tool to combat the spread of invasive species.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seasonal hydrology shapes the taxonomic and functional diversity of fish associated with aquatic macrophytes in a neotropical floodplain lake","authors":"Ruineris Almada Cajado,&nbsp;Lucas Silva de Oliveira,&nbsp;Jerry Max Sanches Corrêa,&nbsp;Fabíola Katrine Souza da Silva-Cajado,&nbsp;Diego Maia Zacardi","doi":"10.1007/s00027-025-01179-x","DOIUrl":"10.1007/s00027-025-01179-x","url":null,"abstract":"<div><p>We evaluated the influence of hydrological phases and limnological variables on the taxonomic composition and functional diversity of fish associated with aquatic macrophytes in a floodplain lake of Amazon Basin, Brazil. Sampling was conducted using seine nets across the four phases of the local hydrological cycle (rising, high-water, receding, and low-water) during the year 2018 in Lake Maicá. The species were identified and classified into four functional groups on the basis of their ecological traits (migration, life history strategy, feeding habits, and swimming performance/microhabitat use). A total of 6075 individuals were captured, representing nine orders, 26 families, and 104 species. The fish assemblages underwent changes in both taxonomic and functional structure in response to the hydrological phases and limnological variables (pH, temperature, dissolved oxygen, and water transparency), with an increase in functional diversity during the receding water and low-water phase. During the low-water period, there was an increase in the abundance of fish with life history strategies at equilibrium, small periodic species as well as invertivores, piscivores, short-distance migrants, and residents. In contrast, the rising and high-water phases contributed to higher abundances of young fish (larvae and juveniles) and medium-distance migratory fish. The synergy among these factors acts as an environmental filter in the structure of the local ichthyofauna, allowing species with antagonistic ecological traits to coexist, maintain their populations, and reduce competition for space and food under varying environmental conditions during the four phases of the annual hydrological cycle. The information presented is essential for identifying priority areas for the conservation of fish assemblages, which represent the primary source of animal protein and income for the region, and for understanding the mechanisms responsible for changes in the taxonomic and functional structure of fish in Amazonian floodplain lakes.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Tracking repeat spawning anadromous fish migrations over multiple years in a fragmented river suggests philopatry and sex‑linked variation in space use","authors":"Peter Davies,&nbsp;J. Robert Britton,&nbsp;Demetra Andreou,&nbsp;Charles Crundwell,&nbsp;Jamie R. Dodd,&nbsp;Olivier Lepais,&nbsp;Andrew D. Nunn,&nbsp;Stephen Sabatino,&nbsp;Randolph Velterop,&nbsp;Jonathan D. Bolland","doi":"10.1007/s00027-025-01176-0","DOIUrl":"10.1007/s00027-025-01176-0","url":null,"abstract":"","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00027-025-01176-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143581027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing the distribution and habitat suitability of Austropotamobius pallipes complex in proximity of invasive Procambarus clarkii in the Avigliana Lakes (northwest Italy): an integrated approach to ecosystem health and conservation","authors":"Alessandra Maganza,&nbsp;Alice Gabetti,&nbsp;Camilla Mossotto,&nbsp;Paolo Pastorino,&nbsp;Giuseppe Esposito,&nbsp;Matteo Riccardo Di Nicola,&nbsp;Barbara Rizzioli,&nbsp;Antonia Concetta Elia,&nbsp;Marino Prearo","doi":"10.1007/s00027-025-01175-1","DOIUrl":"10.1007/s00027-025-01175-1","url":null,"abstract":"<div><p>The white-clawed crayfish (<i>Austropotamobius pallipes</i> complex) is a crucial species complex in European freshwater ecosystems, but its population has faced severe declines since the 1860s due to pollution, habitat loss and fragmentation. The introduction of invasive crayfish species that carry the crayfish plague (<i>Aphanomyces astaci</i>), a water mold, has exacerbated this decline. The Avigliana Lakes Nature Park in Piedmont, Italy, which encompasses the Great Lake, Small Lake and Mareschi wetland, has been designated a Natura 2000 site supporting <i>A. pallipes</i>, particularly in the tributaries of the Small Lake. The aim of this study was to assess both the presence and distribution of <i>A. pallipes</i> in the study area and the physicochemical and ecological characteristics of its habitats. We also evaluated the proximity of invasive crayfish <i>Procambarus clarkii</i> populations to <i>A. pallipes</i> to further current understanding of potential health impacts and support management efforts. Macroinvertebrate monitoring was used to gauge overall ecosystem health and habitat suitability for <i>A. pallipes</i>. The results showed that <i>A. pallipes</i> was present at only two out of the six monitored sites, with no visible signs of disease. Macroinvertebrate monitoring indicated good water quality, while significant differences in pH, conductivity, and nutrient levels were found. Canonical correspondence analysis highlighted key environmental factors for <i>A. pallipes</i>, including conductivity, total dissolved solids, and vegetation. The lack of evidence for crayfish plague within the <i>P. clarkii</i> population may enable more effective management strategies and reduce potential health risks to the <i>A. pallipes</i> population. This study emphasises the need for ongoing monitoring and targeted management to mitigate invasive species’ impacts and conserve native crayfish populations.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dragonflies (Odonata) as bioindicators of the sustainability of agroforestry systems in the Atlantic Forest","authors":"Cíntia Ribeiro,&nbsp;Fernando Geraldo de Carvalho,&nbsp;Fábio de Oliveira Roque,&nbsp;John P. Simaika,&nbsp;Ulisses Gaspar Neiss,&nbsp;Laís Rodrigues Santos,&nbsp;Francisco Maciel Barbosa-Santos,&nbsp;Karolina Teixeira Silva,&nbsp;Marciel Elio Rodrigues","doi":"10.1007/s00027-025-01173-3","DOIUrl":"10.1007/s00027-025-01173-3","url":null,"abstract":"<div><p>Anthropogenic activities constitute a major threat to the physical and ecological integrity of freshwater ecosystems. Among the various anthropogenic impacts, alterations in land use and occupation patterns stand out as key drivers of aquatic ecosystem degradation and loss. In this context, agroforestry systems stand out among various land uses as an alternative for reducing environmental impacts. This study evaluated the integrity of streams in the Atlantic Forest under different land use types and their effects on dragonfly larval assemblages. Dragonfly larvae were collected in native forests, pastures, and cocoa cultivation areas, known locally as Cabruca (an agroforestry system in which Atlantic Forest trees are partially preserved, and cacao is planted in the understory). Our results revealed a difference in genus richness among the studied areas, with Cabruca areas showing higher richness and pasture areas exhibiting lower richness. We also observed variations in species composition, with native areas displaying a more homogeneous composition and pasture areas exhibiting a more heterogeneous composition. In addition, our results indicated that dragonfly larvae can serve as excellent indicators of sustainable cultivation areas. Although Cabruca areas represent a model of sustainable agriculture with the potential to contribute to biodiversity preservation, this study emphasizes that such areas cannot fully replace native habitats, reiterating the importance of conserving the remaining forests and their biodiversity.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental heterogeneity drives the spatial distribution of macrobenthos in the Yellow River Delta wetland","authors":"Qinglu Fu,&nbsp;Jiao Wang,&nbsp;Debin Sun,&nbsp;Jianyu Chi,&nbsp;Wenzheng Fan,&nbsp;Yu Li,&nbsp;Yilin Wang,&nbsp;Baoquan Li,&nbsp;Linlin Chen","doi":"10.1007/s00027-025-01172-4","DOIUrl":"10.1007/s00027-025-01172-4","url":null,"abstract":"<div><p>Exploring the ecological responses of organisms to environmental heterogeneity reveals crucial insights into environmental filtering processes and species distribution patterns, providing a scientific foundation for wetland management and conservation efforts. Macrobenthos play a major role in wetland ecosystem, yet simultaneously, research on biodiversity patterns and their responses to ecological factors remains insufficiently comprehensive. Therefore, we systematically investigated the spatial structure patterns and driving factors of macrobenthic communities in the Yellow River tidal zone (HT) and the Dawenliu tidal zone (DT) of the Yellow River Delta (YRD) wetland using β-diversity analysis, co-occurrence network analysis, and stability analysis. Our findings demonstrate significant differences in community composition and diversity between HT and DT. The HT exhibits higher species richness, dominated by mollusks (51%) and annelids (45%), primarily explained by salinity variations. Conversely, the DT was dominated by arthropods (74%), influenced mainly by sediment sand content. Our findings indicate that environmental heterogeneity intensifies the role of environmental filtering on species distribution. Species turnover dominated biodiversity changes in HT (52%) and DT (80%), driven significantly by sediment properties. Moreover, our research found that high species nestedness enhances the complexity of co-occurrence networks, thereby strengthening the stability of macrobenthic communities. Our study highlights the significance of species coexistence mechanisms in shaping biodiversity patterns. These research findings enhance our understanding of how environmental heterogeneity regulates community composition and sustains biodiversity, underscoring the necessity for diverse conservation strategies.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Spatial and temporal taxonomic and functional beta diversity of macroinvertebrate assemblages along a tropical dammed river","authors":"Diego M. P. Castro,&nbsp;Pedro H. M. do Amaral,&nbsp;Eduardo van den Berg,&nbsp;Robert M. Hughes,&nbsp;Marcos Callisto","doi":"10.1007/s00027-025-01174-2","DOIUrl":"10.1007/s00027-025-01174-2","url":null,"abstract":"","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"87 2","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}