Aquatic Sciences最新文献

{"title":"Turbidity effects on prey consumption and survival of larval European smelt (Osmerus eperlanus)","authors":"Björn Illing,&nbsp;Jennifer Sehl,&nbsp;Stefan Reiser","doi":"10.1007/s00027-024-01103-9","DOIUrl":"10.1007/s00027-024-01103-9","url":null,"abstract":"<div><p>The anadromous European smelt (<i>Osmerus eperlanus</i>) plays a key role in food webs of many riverine ecosystems in Europe. However, population sizes in several German rivers (e.g. Elbe or Weser rivers) have diminished drastically over the past decade. Turbidity has been considered one of the stressors affecting the successful recruitment of European smelt, as their early life stages may be particularly sensitive to changes in the abiotic environment. In this study, we investigated whether prey consumption and survival of European smelt larvae would be negatively affected by an acute exposure to elevated turbidity. We reared the larvae in the laboratory and exposed them in four separate trials (18 to 26 days post hatch, 9.5 ± 0.8 mm standard length, mean ± SD) to six turbidity levels (0–500 NTU, nephelometric turbidity units). We found that prey uptake increased at low turbidity levels and decreased at high turbidity levels, with an optimum between 100 and 200 NTU. Survival started to decrease at turbidity levels above 300 NTU. In addition, we conducted a systematic literature analysis in which we found that prey consumption of larval and juvenile fishes had been tested across a wide range of turbidity levels, mostly using pelagic (e.g. planktonic) prey items, with more studies focusing on perciform fishes and juvenile rather than larval life stages. Our empirical findings contribute to establishing thresholds for optimal larval European smelt performance under increased turbidity and provide valuable information for developing mechanistic models that assess potential consequences for European smelt recruitment dynamics.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00027-024-01103-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569905","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":"Ontogenetic variation in isotopic niche positions of aquatic consumers in boreal lakes","authors":"T. A. Johnston,&nbsp;P. A. Cott,&nbsp;H. K. Swanson,&nbsp;A. D. Ehrman,&nbsp;G. L. Lescord,&nbsp;A. W. Sumner,&nbsp;P.-L. Savage,&nbsp;K. A. Patterson,&nbsp;R. W.-K. Tang,&nbsp;M. J. Heerschap,&nbsp;J. J. Montgomery,&nbsp;J. M. Gunn","doi":"10.1007/s00027-024-01097-4","DOIUrl":"10.1007/s00027-024-01097-4","url":null,"abstract":"<div><p>We used an extensive multispecies dataset to examine how C and N stable isotope ratios (δ¹³C and δ¹⁵N) of aquatic consumers varied with body size in populations of northern lakes. Ontogenetic variation in tissue δ¹³C and δ¹⁵N was evident in a diversity of aquatic consumers. Relationships with body size tended to be stronger and more consistently positive for δ¹⁵N, and more variable in nature for δ¹³C. Among-population variation in ontogenetic slopes was greater for δ¹³C than for δ¹⁵N for most biota examined. Relationships between δ¹³C and δ¹⁵N and body size were still significant even after accounting for variation owing to tissue C:N and body condition. Ontogenetic variation was more strongly linked to age than body size in some fishes, particularly for δ¹⁵N, but age effects, inferred from growth rate, also accounted for variation in δ¹³C and δ¹⁵N beyond body size effects; δ¹³C tended to be positively related and δ¹⁵N tended to be negatively related to growth rate. There was only limited evidence of concordance in ontogenetic slopes between co-habiting pairs of species, suggesting that the factors driving ontogenetic variation in stable isotope ratios may be largely species- or population-specific. However, ontogenetic slopes of individual taxa were related to various lake habitat features representing climate, ecosystem size, and water clarity. The proportion of isotopic niche space attributable to ontogenetic variation can be substantial and this has implications for applying and interpreting isotopic niche metrics. Our study provides the broadest and most comprehensive analysis of ontogenetic variation in isotopic compositions of freshwater consumers to date and our results underscore the need to account for this variation in the analysis of freshwater food webs.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569957","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":"Unveiling the spatio-temporal variation of harmful algal bloom (HAB) species assemblages and their relationship with environmental factors in a tidal creek environment","authors":"Abhilash Wodeyar K,&nbsp;Sahina Akter,&nbsp;Suman Nama,&nbsp;Binaya Bhusan Nayak,&nbsp;Pranab Gogoi,&nbsp;Geetanjali Deshmukhe,&nbsp;Ashok Kumar Jaiswar,&nbsp;Asha Taterao Landge,&nbsp;Porayil Layana","doi":"10.1007/s00027-024-01093-8","DOIUrl":"10.1007/s00027-024-01093-8","url":null,"abstract":"<div><p>The present study provides complementary information on the harmful algal bloom (HAB) species present in Manori Creek coastal water and tidal channel. A total of 67 HAB species representing 35 genera and 7 taxonomic class groups were identified. Among them, 27 were potentially toxic, while 45 had the potential to form harmful algal blooms. Notable blooms included <i>Chaetoceros socialis</i> in April (8.9 × 10⁵ cells l⁻¹) and May (3.9 × 10⁵ cells l⁻¹), <i>Nitzschia palea</i> in May (4.37 × 10⁶ cells l⁻¹) and June (1.1 × 10⁵ cells l⁻¹), and <i>Coscinodiscus radiatus</i> in (2.7 × 10⁵ cells l⁻¹) in January. The marine ciliate <i>Mesodinium rubrum</i> exhibited bloom formation in May (1.33 × 10⁵ cells l⁻¹) at all stations in Manori Creek. Canonical correspondence analysis revealed that the proliferation of HAB species was facilitated by optimal temperature, salinity, and nutrient levels in creek water. Dinoflagellates responsible for paralytic shellfish poisoning (PSP) and diarrhetic shellfish poisoning (DSP) were rare and found in low abundance. Toxin assessment results, based on the mouse bioassay, revealed that <i>Gafrarium divaricatum</i> samples contained paralytic shellfish toxin (PSP toxin) levels &lt; 0.875 mouse units (MU) per 100 g of clam tissue. The test mice exhibited normal fecal consistency, indicating the absence of high levels of diarrhetic shellfish toxin (DSP toxin). The present study recorded HAB species variability and potential toxin accumulation within <i>G. divaricatum</i> in Manori Creek. The data generated from the creek serve as a pivotal base for the advance monitoring initiatives focused on HAB species and their associated toxins within the creek ecosystem.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569958","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":"Contribution and control of microbial necromass carbon in wetland soils","authors":"Shanshan Liao,&nbsp;Xiaodong Nie,&nbsp;Wenfei Liao,&nbsp;Yi Liu,&nbsp;Aoqi Zeng,&nbsp;Zhongwu Li","doi":"10.1007/s00027-024-01098-3","DOIUrl":"10.1007/s00027-024-01098-3","url":null,"abstract":"<div><p>Microbial necromass carbon (MNC) has been identified as an essential component of a persistent soil carbon pool. However, the contribution of MNC to soil organic carbon (SOC) in wetlands remains unclear. This study aims to explore the contribution of MNC to SOC and the factors controlling its distribution in wetlands. The distribution pattern of MNC in drawdown areas was investigated in the inlet and center of the Dongting Wetland, China. Random forest modeling was performed to determine the relative importance of environmental variables to MNC. A partial least squares path model was performed to further explore the direct and indirect effects of environmental variables on MNC. The analyses showed that the MNC content was 2652.70–3314.64 mg kg⁻¹, accounting for 23.16–31.65% of SOC in wetland soils. Compared to bacterial necromass carbon (BNC), fungal necromass carbon (FNC) contributed more to SOC accumulation (over 70% of total MNC) in wetland soils. MNC content and the contribution of BNC to MNC increased with soil depth. In addition, MNC in wetland soils was directly affected by dissolved total nitrogen (DTN) and dissolved organic carbon (DOC)/SOC (<i>p</i> &lt; 0.001; standardized total effect = 0.81). The pH indirectly affected MNC by regulating carbon and nitrogen content, with a standardized total effect of 0.48. In wetland soils, the lower MNC content and lower contribution to SOC may be supported by the slow accumulation of necromass and potential necromass mining in nutrient-poor conditions. Carbon and nitrogen availability played a crucial role in controlling the MNC turnover process in wetland soils.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569956","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":"Monitoring potential impacts of climate change on the biodiversity of springs and springbrooks in the Central Alps","authors":"Stefanie von Fumetti,&nbsp;Angelika Aberhalden","doi":"10.1007/s00027-024-01095-6","DOIUrl":"10.1007/s00027-024-01095-6","url":null,"abstract":"<div><p>Headwaters in alpine regions and their biodiversity are particularly threatened by climatic changes. Most predictions on their response to climate change are based on modeling approaches. Empirically gained data rarely exist for glacially influenced and groundwater-fed headwaters. In 2019, long-term monitoring was initiated at 15 springs, 8 springbrooks and 2 brooks in the UNESCO Biosphere Reserve Engiadina Val Müstair. The goal was to gain data on hydro-ecological aspects over several decades to understand whether (1) the environmental conditions change over time and (2) how these changes influence the composition of the species assemblages. Water temperature loggers were installed, pH, electrical conductivity, oxygen, nutrients and discharge were measured three times per year, and ecomorphological features were mapped two times per year. The meio- and macrofauna was sampled in 2019, 2020 and 2021 with a semi-quantitative approach. The results of the first 5 years of monitoring show that the physico-chemistry, water temperature and discharge confirm the stable character typical for groundwater-fed systems. Certain seasonal variability is evident, which possibly indicates an influence of permafrost or snow meltwater. The composition of the species assemblages differs significantly between sites but stays relatively constant over time within a site. Elevation and the availability of wood—parameters indicating forestation—significantly influence the species composition. This study provides a solid baseline on the environmental conditions and the fauna in springs and springbrooks in the Central Alps, which is needed for a proper interpretation of changes identified on a long-term basis.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00027-024-01095-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141524448","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":"Dormant and active ostracod communities in six rice fields of Yunnan, China","authors":"Dayou Zhai,&nbsp;Qianwei Wang,&nbsp;Changfei Jin","doi":"10.1007/s00027-024-01094-7","DOIUrl":"10.1007/s00027-024-01094-7","url":null,"abstract":"<div><p>Ostracods have frequently been reported as part of the active faunas in the wet phase of rice fields, but knowledge on the dormant ostracods during the dry period of the rice cycle has been limited, hindering a comprehensive understanding of their adaptation to the rice field environment. In this study, we record 11 dormant ostracod species by incubating soil samples from six desiccated rice fields in Yunnan Province of southwestern China. The dormant ostracod community was dominated by species of the family Cyprididae, accompanied by members of Candonidae, Ilyocyprididae, and Notodromadidae. Our data provide unequivocal evidence for the presence of dormant ostracods from all the four families of the superfamily Cypridoidea in desiccated rice fields, verifying that these ostracods adapt to the rice fields by desiccation-resistant stage. Considering the usually shallow penetration depth of ostracods, the frequent discoveries of dormant ostracods in 2‒4 cm depth in the soil profile were probably the result of ploughing. Despite overlap in species composition, the dormant ostracod community differs from the active community sampled at the same sites more than four years ago. This suggests temporal changes of faunal composition, although the ecological memory of the dormant community containing multiple generations and the different seasonal windows represented by the two types of communities should also be considered. The emergence of adults within the first two weeks of the incubation experiment suggests the presence of dormant instars in the soil rather than resting eggs alone.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141531958","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 dynamics of mangrove outwelling and its impact on estuarine productivity: insights from multi-parameter analysis across tidal variations","authors":"Seyieleno C. Seleyi,&nbsp;Chinnarajan Ravindran,&nbsp;Chellandi Mohandass,&nbsp;Prantick Patra,&nbsp;Teja Ankush Naik","doi":"10.1007/s00027-024-01092-9","DOIUrl":"10.1007/s00027-024-01092-9","url":null,"abstract":"<div><p>Tropical mangroves are subjected to extreme environmental conditions yet remain highly productive ecosystems. The Mandovi and Zuari estuaries of Goa on the western coast of India are lined by mangroves and are a rich source of fisheries that supports the coastal livelihood. Despite their ecological and economic significance, the nutrient and organic matter dynamics in tropical mangrove ecosystems remain poorly studied. The hydrographic conditions in the mangrove and adjacent estuarine waters are dictated by monsoonal precipitation, freshwater input, tides, and influx of seawater, resulting in subsequent changes in their physicochemical parameters and organic matter concentrations. The impact of these changes on the phytoplankton biomass and primary productivity in estuarine waters was investigated during the pre-monsoon, monsoon and post-monsoon seasons. Dissolved inorganic nutrients, such as nitrite, nitrate, ammonia, phosphate and silicate, displayed wide seasonal variability and were higher during the low tide than those in high tide. Isotopic and elemental ratios of carbon and nitrogen revealed that primary productivity in the estuaries was enhanced by the outwelling of mangrove-derived organic matter. The highest chlorophyll a and primary productivity were observed during the pre-monsoon season, with Zuari exhibiting higher levels compared with Mandovi. Multivariate statistical analyses confirmed that primary productivity was influenced mainly by temperature, salinity, pH, dissolved oxygen and organic matter. Results from our study emphasizes the role of outwelling of organic matter from mangroves and their influence on primary productivity in adjacent estuarine waters.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502643","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":"Combining biotelemetry and genetics provides complementary insights relevant to the management and conservation of a freshwater predator (Esox lucius) living in brackish lagoons","authors":"Olga Lukyanova,&nbsp;Félicie Dhellemmes,&nbsp;Stefan Dennenmoser,&nbsp;Arne W. Nolte,&nbsp;Robert Arlinghaus","doi":"10.1007/s00027-024-01090-x","DOIUrl":"10.1007/s00027-024-01090-x","url":null,"abstract":"<div><p>To inform the management of wild fish populations, it is equally important to understand both the ecological connectivity of habitat patches, apparent at annual and seasonal scales, and the genetic connectivity, emerging at evolutionary scales across generations. Ecological connectivity indicates the potential for rapid recolonization upon local depletion, while genetic connectivity informs about the conservation needs related to the evolution of subpopulations and ecotypes in metapopulations. We combined acoustic biotelemetry and pooled-genome sequencing to study a northern pike (<i>Esox lucius</i>) population as a model of a freshwater piscivore that inhabits a network of shallow brackish lagoons in the southern Baltic Sea. We found limited ecological connectivity among genetically similar subpopulations of pike, suggesting a metapopulation structure characterized by discrete local subpopulations with infrequent migrations between them. Connectivity of different lagoons increased during spawning, suggesting directed spawning migrations to either freshwater rivers or low salinity patches in connected lake-like bays. Spawning site fidelity to either brackish or freshwater spawning sites was observed, further contributing to the reproductive isolation of certain subpopulations. The genetic population structure aligned with salinity gradients and geographical distance and was significant between pairs of rivers draining into the lagoon network, but it was unrelated to ecological connectivity. The results collectively suggest that local subpopulations may not rapidly replenish upon local depletion and that even weak connectivity among subpopulations was sufficient to maintain genetic homogeneity across lagoons with similar salinity levels. Effective management and conservation of species forming metapopulations, such as the coastal northern pike studied here, necessitate localized approaches that adapt fishing mortality to local abundance and promote access to specific habitats, especially\u0000rivers, during spawning to conserve the entire genetic biodiversity and foster resilience of the metapopulation.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00027-024-01090-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502642","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":"Existing dataset suggests lakes in agricultural watersheds are warming faster than urban or forested lakes","authors":"Patrick T. Kelly,&nbsp;Kathleen Cutting,&nbsp;Samantha Supan,&nbsp;Jake Ackerman,&nbsp;Rebecca Erickson,&nbsp;Edward Pope","doi":"10.1007/s00027-024-01091-w","DOIUrl":"10.1007/s00027-024-01091-w","url":null,"abstract":"<div><p>Lake temperatures are important drivers of ecological and ecosystem processes, including influencing organism physiology and biogeochemical rates. Over the past several decades, lake surface temperatures have warmed due to increases in air temperatures driven by anthropogenic climate change. Similarly, increases in surface temperatures have contributed to stronger water column stratification, which also affects oxygen dynamics, nutrient cycling, and organism habitat availability. To date, we know relatively little about how land use impacts lake temperatures. We hypothesized a greater proportion of urban land use within the watershed may increase warming in lakes and lead to increased strength of stratification through time relative to other land use types, as urban heat islands and warmer runoff would contribute to greater warming. We explored trends in lake surface temperatures and stratification strength using a long-term dataset of widely distributed lakes. Contrary to our expectations, we did not observe greater warming in urban lakes; however, we did see higher rates of warming with greater agricultural land use in the watershed. We did not observe any patterns between land use and stratification strength, but stratification strength increased through the time series across lakes. Our results suggest greater warming is an important consideration for projecting the ecological implications for land use change and agricultural expansion. Our assessment of a multi-continental set of lakes also highlights the need to emphasize long-term data collection in human-impacted systems.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502644","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":"Effects of metals exposure on morphological and histological structure of the digestive gland in native and invasive clams in the Paraná de las Palmas River (Buenos Aires, Argentina)","authors":"Tatiana Noya Abad,&nbsp;Henrique Knack de Almeida,&nbsp;Yanina Susana Minaberry,&nbsp;María Soledad Yusseppone,&nbsp;Javier Ángel Calcagno,&nbsp;Sebastián Eduardo Sabatini","doi":"10.1007/s00027-024-01087-6","DOIUrl":"10.1007/s00027-024-01087-6","url":null,"abstract":"<div><p><i>Corbicula fluminea</i> is an aggressive invasive species that has successfully colonized aquatic habitats worldwide, producing changes in natural environments and impacting endemic populations. As disturbed environments may favor the adaptive success of exotic species over native ones, we studied the fitness response of two freshwater bivalves, invasive <i>C. fluminea</i> and native <i>Diplodon delodontus</i>, to the presence of metals in the Parana de la Palmas River. To assess the health status of both species, we analyzed morphological and histological alterations in the digestive gland and their relation to metal concentrations in this organ and in the water. Water and specimens sampling took place in the first section of the delta of the Parana River in June and September. Most metal concentrations increased in the river, although in the digestive gland only iron in <i>D. delodontus</i> and nickel and zinc in <i>C. fluminea</i> increased seasonally. Digestive gland factor and hepatosomatic index indicated higher values in <i>C. fluminea</i> in both periods. Despite histological analysis showing a decrease in atrophic tubules frequency in both species, which was followed by histomorphometric parameters of the epithelium and lumen of the digestive tubules, <i>C. fluminea</i> exhibited a greater physiological capacity for metal metabolism and recovery. These results suggest that the physiological characteristics of the Asian clam <i>C. fluminea</i>, combined with its reproductive efficiency and broad dispersal capacities, could explain its invasive dispersal competence over the <i>D. delodontus</i> in the disturbed environmental conditions observed in the Parana de las Palmas River.</p></div>","PeriodicalId":55489,"journal":{"name":"Aquatic Sciences","volume":"86 3","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141254639","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}