International Review of Hydrobiology最新文献

{"title":"Temporal dynamics of rotifers' feeding guilds shaped by chlorophyll-a, nitrate, and environmental heterogeneity in subtropical floodplain lakes","authors":"Fabiana Palazzo,&nbsp;Francieli F. Bomfim,&nbsp;Juliana D. Dias,&nbsp;Nadson R. Simões,&nbsp;Fábio A. Lansac-Tôha,&nbsp;Claudia C. Bonecker","doi":"10.1002/iroh.201902037","DOIUrl":"10.1002/iroh.201902037","url":null,"abstract":"<p>In floodplains, rotifers are among the most abundant zooplankton organisms and play an important role in ecosystem functioning. Here, we evaluated the distribution of six feeding guilds of rotifers including filter C1 (body size: &lt;200 µm), filter C2 (body size: &gt;200 to &lt;600 µm), filter C3 (body size: &gt;600 to &lt;1000 µm), filter C4 (body size: &gt;1000 µm), suctor, and predator for 11 years. We also analyzed the relationship between guild distribution and environmental parameters (i.e., chlorophyll-a, phosphate, nitrate, ammonia, and inorganic suspended matter). Finally, we investigated the relationship between feeding guilds heterogeneity (abundance inconsistency) and environmental heterogeneity. Sampling occurred every 3 months from 2000 to 2010 in six shallow lakes of the Upper Paraná River floodplains. Filters C1, Filter C2, and suctors were the dominant feeding guilds. Nitrate and chlorophyll-a shaped the temporal distribution of the guilds. An intermediate value of environmental heterogeneity was correlated with greater feeding guilds heterogeneity, potentially indicating that intermediate disturbance in the environmental variables may allow for greater differences in abundance distribution between rotifer guilds in shallow floodplain lakes. Our study elucidated the role of rotifers in food resource consumption, energy transfer, and competitive relationships in response to temporal environmental heterogeneity in subtropical floodplains.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"106 2","pages":"95-105"},"PeriodicalIF":1.9,"publicationDate":"2020-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201902037","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48453178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on aquatic ecosystems – freshwater and marine environments and their management","authors":"","doi":"10.1002/iroh.202075010","DOIUrl":"10.1002/iroh.202075010","url":null,"abstract":"","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 5-6","pages":"115"},"PeriodicalIF":1.9,"publicationDate":"2020-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/iroh.202075010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44580147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Substratum selection and feeding responses influence the demography of the sessile rotifer Cupelopagis vorax (Collothecacea: Atrochidae)","authors":"Cristian Alberto Espinosa-Rodríguez,&nbsp;S. S. S. Sarma,&nbsp;Nandini Sarma,&nbsp;Robert L. Wallace","doi":"10.1002/iroh.202002051","DOIUrl":"10.1002/iroh.202002051","url":null,"abstract":"<p>Larvae of the sessile rotifer <i>Cupelopagis vorax</i> swim using their ciliated corona, but do not feed. Once they attach to a substratum and metamorphose into adults, they are predatory on protozoans and micrometazoans. Here we present information on ingestion time, feeding behaviour and food preference of <i>C. vorax</i> using protozoans and non-sessile rotifers as prey. We also tested effects of physical, chemical and biological stimuli on settlement of <i>C. vorax</i> larvae and, using life table experiments, determined their survivorship and fecundity on three, free-floating macrophytes. Ingestion time was shortest on prey species smaller than 100 µm. Capture/attack ratio was low for <i>Brachionus calyciflorus</i>, but high for <i>Lecane inermis</i> and <i>Peranema</i> sp. The ingestion/capture ratio was lowest for <i>Oxytricha</i> sp. and highest for <i>Euchlanis lyra</i> and <i>Squatinella lamellaris</i>. Species that swim slowly and close to the surface of hydrophytes (<i>E</i><i>. lyra</i>, <i>Lepadella patella</i>, <i>L</i>. <i>inermis</i>, <i>Peranema</i> sp., <i>Philodina</i> sp. and <i>S</i>.<i> lamellaris</i>) had lower ingestion time, higher encounter/attack ratio, and were the preferred prey in selectivity experiments. Larval settlement was higher on macrophyte leaves of <i>Ceratophyllum demersum</i>, <i>Lemna valdiviana</i> and <i>Wolffiella</i> sp., but lower on <i>Azolla filiculoides</i> and <i>Wolffia columbiana</i>. Coverslips coated with dried extracts of macrophytes showed lower rates of larval settlement compared to live macrophytes, as well as coverslips that had been allowed to develop natural biofilms or were physically roughened. Contrary to what might be expected from the settling tests, life-table experiments showed that <i>W. columbiana</i> enhanced survivorship (mean lifespan and life expectancy) and rate of population increase, while animals attached to <i>Wolffiella</i> sp. had lower values for life history characteristics. This study adds to our understanding of the impact of <i>Cupelopagis</i> predation on protozoans and rotifers and the importance of substratum selection on larval settlement, adult survival, and reproductive potential after larval settlement.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"106 1","pages":"18-28"},"PeriodicalIF":1.9,"publicationDate":"2020-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.202002051","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46211293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Beta diversity patterns in zooplankton assemblages from a semiarid river ecosystem","authors":"Natanael J. da Silva,&nbsp;Fernando M. Lansac-Tôha,&nbsp;Fábio A. Lansac-Tôha,&nbsp;Paulo César L. Sales,&nbsp;José de Ribamar de Sousa Rocha","doi":"10.1002/iroh.201902018","DOIUrl":"10.1002/iroh.201902018","url":null,"abstract":"<p>The study of beta diversity patterns, as well as their underlying mechanisms, is fundamental for the understanding of community structure in aquatic ecosystems. Here, we aimed to investigate patterns of beta diversity in cladoceran, copepod, and rotifer assemblages in the Parnaíba and Poti rivers, along the urban perimeter of the city of Teresina (Piaui, Brazil) and to evaluate the effect of environmental, spatial, and temporal factors on beta diversity in the zooplankton assemblages. We used the Simplex analysis to represent the relative importance of replacement and abundance difference to beta diversity. The decomposition of beta diversity into its components was performed using the Ruzicka dissimilarity index, for abundance data. Distance-based Redundancy Analyses and variation partitioning were used to explore the relations between explanatory variables and beta diversity and its components. We found that beta diversity was high both spatially and temporally, and the abundance difference component showed greater relative importance than the replacement component. Environmental factors showed a greater contribution to the total explained variability in beta diversity and abundance difference, while replacement received most importance of temporal and spatial variables. Our study provides new insights on how environmental, spatial, and temporal factors shape beta diversity patterns in zooplankton assemblages in impacted aquatic ecosystems.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"106 1","pages":"29-40"},"PeriodicalIF":1.9,"publicationDate":"2020-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201902018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44871846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of climate warming on microbial loop function in peat pools and Sphagnum hollows: Mesocosm experiments","authors":"Tomasz Mieczan,&nbsp;Monika Tarkowska-Kukuryk","doi":"10.1002/iroh.202002044","DOIUrl":"10.1002/iroh.202002044","url":null,"abstract":"<p>Climate change models predict a possible increase in air temperature of 2–8°C. This means that global warming will significantly affect the functioning of various types of hydrogenic ecosystems. However, the effect of the temperature increase on microbial loop function in small water bodies associated with peat ecosystems (peat pools and <i>Sphagnum</i> hollows) is still unknown. We used mesocosm experiments (control and treatments with a 2°C, 4°C and 8°C temperature increase) to determine the response of bacterioplankton, flagellates, testate amoebae and ciliates to simulated temperature changes, taking into account seasonal variation in the temperate climate zone. The simulated increase in climate warming increased the species richness of ciliates and the abundance of bacteria, flagellates and ciliates. In contrast, there was a decrease in the species number and abundance of testate amoebae, the top predators in peat ecosystems. The sensitivity of the various microbial groups to temperature was size-dependent; large-sized testate amoebae declined under warming. These shifts caused a decrease in the predator–prey mass ratio. An increase in the abundance of top predators promotes increased abundance of ciliates, and thus changes the architecture of the food web. At the same time, we observed the increase in phycoflora biomass thus can cancel the potential negative effects of warming on heterotrophic microbial activity. So, the potential effect of warming on the C budgets of peat pools and hollows is evident. A better understanding of what regulates microbial populations and activity in small reservoirs in peat bogs and unravelling of these fundamental mechanisms are particularly critical to more accurately predict how peat bogs will respond to climate disturbances.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"106 2","pages":"106-120"},"PeriodicalIF":1.9,"publicationDate":"2020-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.202002044","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45400328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genomic markers confirm introgressive hybridization in Cichla (Teleostei) in an invaded coastal system","authors":"Nathália A. Diamante,&nbsp;Alessandra V. de Oliveira,&nbsp;Ana C. Petry,&nbsp;Paula A. Catelani,&nbsp;Fernando M. Pelicice,&nbsp;Larissa P. Mueller,&nbsp;Sônia M. A. P. Prioli,&nbsp;Alberto J. Prioli","doi":"10.1002/iroh.201902030","DOIUrl":"10.1002/iroh.201902030","url":null,"abstract":"<p>Hybridization seems frequent among <i>Cichla</i> species (peacock bass), as studies have reported hybrids in populations within and outside their natural range (the Amazon and Orinoco river basins). <i>Cichla kelberi</i> and <i>C. monoculus</i> were introduced to the São João river (Southeast Brazil) more than 20 years ago, where they successfully colonized different environments. In this system, specimens have coloration and morphology that differ from patterns observed in their native range, indicating that the contact between <i>C. monoculus</i> and <i>C. kelberi</i> eliminated reproductive isolation, leading to introgressive hybridization. In this context, we used the <i>LWS</i> and <i>dlx2</i> genes and the random amplified polymorphic DNA technique to characterize <i>Cichla</i> species in the São João river and to detect possible hybridization processes. The genetic markers identified here showed mismatches between mitochondrial and nuclear DNA in <i>C. monoculus</i> and <i>C. kelberi</i>, sampled both in the reservoir and in the estuarine stretch. Fragments of nuclear DNA from both species, as well as the presence of mitochondrial DNA from one species associated with the nuclear genome of the other, provide strong evidence of hybridization associated with bidirectional genetic introgression. Because hybrids may be more resistant, competitive, and aggressive than their parental species, these invaders may pose a significant threat to native biodiversity in this and other coastal rivers of the region.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"106 1","pages":"48-57"},"PeriodicalIF":1.9,"publicationDate":"2020-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201902030","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43208481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Littoral vegetation predicts mollusc distribution in a network of unconnected small karstic lakes in the Mediterranean zone of Albania","authors":"Erika Lorencová,&nbsp;Jindřiška Bojková,&nbsp;Eliška Maršálková,&nbsp;Michal Horsák","doi":"10.1002/iroh.201902035","DOIUrl":"10.1002/iroh.201902035","url":null,"abstract":"<p>Small lakes and ponds in karstic systems have received little attention in terms of mollusc research. Although these systems represent a refuge for lentic biota in most of the Mediterranean, there are virtually no ecological studies from many regions, including Albania. Therefore, we quantitatively studied mollusc assemblages at 58 sampling sites within a compact karstic area of Central Albania and measured a set of potentially important environmental variables. Only nine ubiquitous species, including three non-native mollusc species, were recorded. <i>Gyraulus albus, Radix auricularia</i> and <i>Physa acuta</i> were the most frequent species. Individual sites hosted notably species-poor assemblages, ranging between zero and six species, with more than half of the studied sites being unoccupied. Mollusc presence was predicted mainly by fine substrate, depth of soft sediment and high transparency. Despite the importance of calcium for molluscs, more species were recorded at sites with a low calcium concentration. Regression tree analysis explained 40% of the total variation, defining reed cover and lake surface area as the most important variables for mollusc species richness. Based on mollusc species composition, the sites were clustered into four groups, differing mainly in submerged littoral vegetation cover, depth of soft sediment and reed cover. Our results showed that limited development of littoral vegetation and the area of lakes are the major drivers for mollusc species presence and their distribution in the studied network of unconnected karstic lakes.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"106 2","pages":"121-130"},"PeriodicalIF":1.9,"publicationDate":"2020-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201902035","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43761402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of regulated dam discharge on plants and migratory waterfowl are mediated by salinity changes in estuaries","authors":"Ji Yoon Kim,&nbsp;Gu-Yeon Kim","doi":"10.1002/iroh.202002042","DOIUrl":"10.1002/iroh.202002042","url":null,"abstract":"<p>The rapid increase in dam construction has resulted in a worldwide loss of natural river flows. Regulated dam discharge into estuaries can interrupt the spatiotemporal occurrence of brackish communities adapted to optimal salinity ranges, further threatening biodiversity and ecosystem function in the affected regions. We used annual survey records from the Nakdong River Estuary from 2009 to 2018 to identify the indirect effect of regulated dam discharge on plants and migratory waterfowl. Increased mean salinity during the spring season negatively influenced the area covered by plants and the number of days on which swans were present during winter. Moreover, the mean salinity during the early growing periods of plants providing food to waterfowl was regulated by the amount of freshwater discharge from the estuarine barrage rather than by the direct effect of precipitation. Conservation managers should consider the amount of dam discharge and the salinity conditions during spring to maintain sufficient food resources and supporting functions for migratory waterfowl in the estuary. Our study highlights the need for a comprehensive assessment of time-lag effects to minimize the negative impacts resulting from regulated dam discharge.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"106 1","pages":"58-63"},"PeriodicalIF":1.9,"publicationDate":"2020-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.202002042","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47724592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distribution patterns and diversity of riverine fishes of the Lake Victoria Basin, Kenya","authors":"Frank O. Masese,&nbsp;Alfred O. Achieng’,&nbsp;Philip O. Raburu,&nbsp;Ted Lawrence,&nbsp;Jessica T. Ives,&nbsp;Chrisphine Nyamweya,&nbsp;Boaz Kaunda-Arara","doi":"10.1002/iroh.202002039","DOIUrl":"10.1002/iroh.202002039","url":null,"abstract":"<p>The Lake Victoria Basin (LVB) is a global hotspot of aquatic biodiversity, but aquatic ecosystems are under threat from multiple stressors. Most studies on fish have focused on Lake Victoria, while patterns of fish diversity, distribution, and assemblage structure in influent rivers remain poorly understood. To assess threats and conservation status of riverine fishes, we used sampling surveys and searches of published and gray literature to compile data on diversity, distribution, and abundance. In total, 72 fish species were found to inhabit Kenyan rivers and associated wetlands and lakes (excluding Lake Victoria). Low-order streams (first to third order) in headwaters of rivers are species-poor and dominated by small-bodied cyprinids (<i>Enteromius</i> spp.) and clariids (<i>Clarias</i> spp.). A small number of fishes are endemic to rivers, and species turnover across river basins is low. Species dominance is high, with 10 species accounting for &gt;90% of all individuals and weights. Two cyprinid species (<i>Labeobarbus altianalis</i> and <i>Labeo victorianus</i>) account for &gt;65% of all individuals and weights (biomass) per unit effort. Most species occur in small numbers and low biomass is insufficient to sustain a commercial riverine fishery. A review of the literature continues to indicate a reduction in migratory runs of potamodromous fishes from Lake Victoria into influent rivers, although some species, such as <i>L. victorianus</i> and <i>L. altianalis</i>, also maintain stenotopic populations in rivers. Most of the exotic fishes introduced in Lake Victoria, such as <i>Oreochromis nilotics</i>, <i>Oreochromis</i>, <i>Coptodon zillii</i>, <i>Coptodon rendalli</i>, <i>and Gambusia affinis</i>, have invaded and established themselves in rivers, thereby posing a threat to riverine populations. Although this study focuses on Kenyan rivers, the distribution patterns of fishes reflect other rivers of the LVB and have broad implications on threats to riverine biodiversity in other regions undergoing development around the world.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 5-6","pages":"171-184"},"PeriodicalIF":1.9,"publicationDate":"2020-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.202002039","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49134962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Compound-specific δ15N analyses of amino acids for trophic level estimation from indigenous and invasive freshwater amphipods","authors":"René Sahm,&nbsp;Eike Sünger,&nbsp;Lisa Burmann,&nbsp;Jochen P. Zubrod,&nbsp;Ralf Schulz,&nbsp;Patrick Fink","doi":"10.1002/iroh.202002058","DOIUrl":"10.1002/iroh.202002058","url":null,"abstract":"<p>Invasion of non-native species in freshwater ecosystems often alters the indigenous macroinvertebrate community and food web structure by changing the resource availability. One of these species is the invasive amphipod <i>Dikerogammarus villosus</i>, whose impact by predation, especially on coexisting amphipods, is still under debate. In this study, we aim to apply compound-specific stable isotope analysis of amino acid δ¹⁵N, which is the state-of-the-art approach for marine systems to estimate trophic positions, (1) to calculate <i>β</i> values (i.e., the differences in δ¹⁵N values of trophic and source amino acids in primary producer) for freshwater systems, based on field samples of freshwater primary consumers (i.e., mussels) from the River Rhine, and (2) use these <i>β</i> values in a case study to calculate the trophic position of the invasive <i>D. villosus</i> in comparison with coexisting indigenous and non-native amphipod species from the river Alb sampled in 2013 and river Speyerbach sampled in 2014, two tributaries of the River Rhine, Central Europe. Our results show that our freshwater <i>β</i> values calculated for six combinations of trophic and source amino acids were lower by between approximately 0.85‰ and 5.67‰ than those found for marine animals in previous studies. This highlights that more attention is needed on the variability of the natural differences in <i>β</i> values between ecosystems. By using the freshwater <i>β</i> values, we showed that the trophic position of <i>D. villosus</i> is comparable to those of coexisting amphipod species. These findings confirm that <i>D. villosus</i> has a flexible and omnivorous feeding strategy like other amphipod species, and suggest that predation is not the main responsible factor for the impact of <i>D. villosus</i> on other species.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"106 1","pages":"41-47"},"PeriodicalIF":1.9,"publicationDate":"2020-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.202002058","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45233950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}