International Review of Hydrobiology最新文献

{"title":"Urbanisation reduces litter breakdown rates and affects benthic invertebrate structure in Pampean streams","authors":"Marina Tagliaferro,&nbsp;Adonis Giorgi,&nbsp;Ana Torremorell,&nbsp;Ricardo Albariño","doi":"10.1002/iroh.201902000","DOIUrl":"10.1002/iroh.201902000","url":null,"abstract":"<p>The Pampean region has become one of the most urbanised areas in South America with more than 91% of the Argentinean population. This region is ideal for human settlements that have historically chosen riverine grassland areas to settle. Consequently, urban streams are increasingly subjected to pressures affecting their functioning. The aim of this study was to assess urbanisation effects on two proxies of stream integrity: leaf litter decay and benthic invertebrate assemblage colonizing litter in streams draining urbanised versus reference grassland areas. We placed plastic coarse- and fine-mesh bags containing <i>Populus nigra</i> leaf litter along three urban and three reference reaches, and these were retrieved periodically to determine the remaining leaf mass and the identity and quantity of detritivore assemblage colonizing bags. The decay rate was negatively affected by urbanisation, and it followed a negative relationship with increasing Nitrogen concentration (mostly ammonia) and a hump-shape relationship against soluble reactive phosphorus. Urban invertebrate assemblages were significantly different from the reference reaches, and were species-poorer and characterized by tolerant taxa belonging to Naididae, Glossiphoniidae, and Nematoda, whereas Hyalellidae, Aeglidae, Chironomidae, Caenidae, Baetidae, and Hydrobiidae represented the reference reaches. Our proxies of structural (i.e., invertebrate assemblages) and functional (i.e., leaf litter breakdown) stream integrity were mostly driven by a nutrient-enrichment gradient and responded in a similar direction but with different magnitude to urban alterations.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 1-2","pages":"33-43"},"PeriodicalIF":1.9,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201902000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42271120","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":"Conversion of tropical forests to agriculture alters the accrual, stoichiometry, nutrient limitation, and taxonomic composition of stream periphyton","authors":"Flavia Tromboni,&nbsp;Christine Lourenço-Amorim,&nbsp;Vinicius Neres-Lima,&nbsp;Steven A. Thomas,&nbsp;Monalisa Silva-Araújo,&nbsp;Rafael Feijó-Lima,&nbsp;Eduardo F. Silva-Júnior,&nbsp;Thomas Heatherly II,&nbsp;Timothy P. Moulton,&nbsp;Eugenia Zandonà","doi":"10.1002/iroh.201801963","DOIUrl":"10.1002/iroh.201801963","url":null,"abstract":"<p>The conversion of forests to agriculture in tropical areas profoundly changes adjacent streams by modifying hydrological conditions, altering light regimes, and increasing nutrient concentrations. In this study, we used an integrative approach to examine how transformations of intact forests affected the physical, chemical, and biological properties of periphyton, in three Brazilian Atlantic rainforest streams. We found that riparian land use change affected the stream periphyton in a variety of ways that were linked to the availability of light and nutrients. Periphyton standing stocks and accrual rates of new periphyton biomass on tiles were higher in deforested reaches than forested reaches. Linear mixed-model analyses showed that the increase of chlorophyll-<i>a</i> in the periphyton was explained by the increase in deforestation and soluble reactive phosphorus concentration. Deforestation also altered periphyton stoichiometry as deforested streams exhibited lower C:P, whereas C:N ratios decreased with increasing NH₄⁺ concentration that was higher in some deforested reaches. Periphyton productivity appeared to be limited by light in forested reaches and by nutrients in deforested reaches. There was differential availability of nitrogen and phosphorus in the deforested reaches, depending on land use type, and this resulted in different nutrient limitation. Periphyton community structure shifted from taxa less tolerant to high nutrients and light found in forested sites, to species tolerant to these conditions dominating periphyton assemblages in deforested sites. The loss of canopy cover was the strongest predictor of community composition for all sites, whereas phosphorus concentration was the best predictor of algal abundance in deforested reaches. This study highlights the complex effects of forest clearing on stream periphyton, ranging from changes to biomass accrual, nutrient limitation, stoichiometry, and community structure. We show the importance of using a comprehensive approach to help determine and predict how deforestation impacts stream ecosystems.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"104 5-6","pages":"116-126"},"PeriodicalIF":1.9,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201801963","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42016390","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.201972010","DOIUrl":"https://doi.org/10.1002/iroh.201972010","url":null,"abstract":"","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"104 3-4","pages":"45"},"PeriodicalIF":1.9,"publicationDate":"2019-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201972010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91940194","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":"Functional redundancy in leaf-litter-associated aquatic hyphomycetes: Fine sediment alters community composition but hardly decomposer activity","authors":"Aingeru Martínez,&nbsp;Ana V. Lírio,&nbsp;Isabel Febra,&nbsp;João Rosa,&nbsp;Ana L. Gonçalves,&nbsp;Cristina Canhoto","doi":"10.1002/iroh.201901997","DOIUrl":"10.1002/iroh.201901997","url":null,"abstract":"<p>The increase in the flow of fine sediments to the aquatic ecosystems (AH), as a consequence of human activities, is a widespread stressor that may alter the structure of biological communities and ecosystem processes. In this study, the effects of sediments (Ø &lt; 2 mm) on the structure (biomass and composition) and activity (decomposer activity and sporulation rate) of litter-associated microorganisms (mainly AH) were investigated. For this, leaf discs of in-stream preconditioned <i>Quercus robur</i> were incubated in microcosms for 30 days under the influence of four different grain-size (&lt;2, 1–0.5, 0.5–0.063, and &lt;0.063 mm) sediments kept in motion. Fine sediments barely altered microbial decomposer activity and did not affect fungal biomass. Meanwhile, the sporulation rate was enhanced by sediments’ presence, the results being grain-size-dependent, and the fungal community composition was affected by the presence of sediments, independently of grain size. These findings evidence the functional redundancy of microbial assemblages involved in leaf litter decomposition in freshwaters.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 1-2","pages":"44-51"},"PeriodicalIF":1.9,"publicationDate":"2019-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201901997","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43956779","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":"Silent invasion: Sinanodonta woodiana successfully reproduces and possibly endangers native mussels in the north of its invasive range in Europe","authors":"Maria Urbańska,&nbsp;Małgorzata Kirschenstein,&nbsp;Krystian Obolewski,&nbsp;Małgorzata Ożgo","doi":"10.1002/iroh.201801971","DOIUrl":"10.1002/iroh.201801971","url":null,"abstract":"<p>The explosive global spread of <i>Sinadonta woodiana</i>, a large-bodied unionid mussel of East Asian origin, potentially affects the functioning of freshwater habitats and threatens native mussels. Molecular data indicate that its invasion in Europe started with a single colonization event, followed by in situ adaptation. This study traces one of the possible routes of such adaptation. It documents a population of <i>S. woodiana</i> with a known history of a two-stage introduction: first, from a heated water source to a production fish pond in northern Poland, and subsequently from that pond to the study site. As the latest local transfer occurred more than 15 years before the study, the abundance of young <i>S. woodiana</i> in various age classes provides proof of ongoing in situ reproduction and resolves the question of the ability of <i>S. woodiana</i> to permanently colonize thermally unpolluted water bodies in areas with prolonged and cold winters. The study also shows that translocations of glochidia-infested fish and/or adult mussels between water bodies in such areas result in the establishment of new self-recruiting populations. Together, these findings show that further expansion of <i>S. woodiana</i> into colder regions and establishment of new populations in already invaded areas are to be expected. The relative abundance of <i>S. woodiana</i> and the native unionids: <i>Anodonta anatina</i> and <i>A. cygnea</i> was 40%, 18%, and 42%, respectively. <i>S. woodiana</i> contributed to 65% of the total mussel biomass. Individuals in the first three size classes, corresponding to the 2- to 4 year age classes, composed 50% of <i>S. woodiana</i>, 37% of <i>A. anatina</i>, and 26% of <i>A. cygnea</i>. The high proportion of young individuals in <i>S. woodiana</i> indicates population trajectories toward a gradually increasing dominance of this species and possibly reflects its negative impacts via interactions with host fish and competition for resources.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"104 5-6","pages":"127-136"},"PeriodicalIF":1.9,"publicationDate":"2019-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201801971","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45008119","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":"Factors explaining community contrast of Trichoptera assemblages at insular Western Carpathian spring fens to the adjacent headwaters","authors":"Jana Petruželová,&nbsp;Jindřiška Bojková,&nbsp;Lenka Hubáčková,&nbsp;Vanda Šorfová,&nbsp;Vít Syrovátka,&nbsp;Michal Horsák","doi":"10.1002/iroh.201901987","DOIUrl":"10.1002/iroh.201901987","url":null,"abstract":"<p>The specific biota of isolated habitats is determined by habitat properties (e.g., age, size, environmental conditions), their spatial isolation and the characteristics of the surrounding landscape matrix. In this study, we examine the contrast in Trichoptera assemblages between isolated island-like Western Carpathian spring fens and nearby headwater streams. We evaluate the potential of streams and their mesohabitats to serve as stepping-stone habitats for fen species, and identify factors determining the dissimilarity of the Trichoptera between the fens and streams. Of 24 studied fen-stream pairs, 80 Trichoptera taxa, mainly species, were identified. Out of these, 17 and 34 species were exclusive for fens and streams, respectively. Although the remaining 29 species were in common, a clear preference of each species to one of these two habitat types was observed, which resulted in highly contrasting assemblages in terms of species composition. A clear difference was found also at the level of species traits, as cold-adapted crenobiont and crenophilous species of small body size, limited dispersal ability, and long larval development prevailed at the fens. The fen-stream dissimilarity of Trichoptera was not associated either with fen habitat properties (age, size and environmental conditions) or with the distance between the habitats. Only stream characteristics reducing the fen-stream environmental contrast were important. Abundance of fen species at streams was negatively related with substrate roughness and stream size, suggesting that small streams with a fine substrate can serve preferably as stepping-stone habitats for the fen species. Our results show the high conservation value of spring-fen Trichoptera assemblages due to the prevalence of habitat specialists as well as cold stenothermic and pollution-sensitive species. It also seems that the isolation of fens surrounded only by unsuitable streams is additionally increased by a lack of stepping-stone habitats in the surrounding matrix.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 1-2","pages":"20-32"},"PeriodicalIF":1.9,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201901987","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47776675","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":"Within-species phenotypic diversity enhances resistance to stress - A case study using the polymorphic species Bosmina longirostris","authors":"Małgorzata Adamczuk,&nbsp;Tomasz Mieczan","doi":"10.1002/iroh.201901985","DOIUrl":"https://doi.org/10.1002/iroh.201901985","url":null,"abstract":"<p><i>Bosmina longirostris</i> is a polymorphic cladoceran, widely distributed throughout the world in temperate and tropical climates, where it colonises all kinds of freshwater bodies regardless of their trophy, acidification, or salinity. In this paper, we test the hypothesis that the ability of <i>B. longirostris</i> to colonise new freshwater bodies results from their maintenance of morphotypes with different life histories. To test the above hypothesis, the life histories of four morphotypes of <i>B. longirostris</i> were analysed through daily observations of individuals cultured separately under uniform optimal conditions. We demonstrated that these morphotypes differed in somatic growth, reproductive effort, lifespan, and fitness, and differences in life histories among morphotypes resulted from the trade-offs between these parameters. Next, we examined the role of distinct morphotypes (each with specific life-history) in populations subjected to stress: we maintained two populations of <i>B. longirostris</i> under biotic stress (the presence of invertebrate predators) or abiotic stress (elevated salinity). At the end of the experiment these populations differed from one another in the relative density of morphotypes in comparison with the population cultured in the optimal environment. In populations that suffered from predatory pressure we found an increase in the relative density of morphotypes that grew considerably quicker, had a shorter lifespan, reproduced infrequently but delivered many offspring at each reproductive event. In populations that suffered from elevated salinity, we observed an increase in morphotypes that exhibited low reproductive effort but had the highest survival. Simultaneously, with phenotypic regrouping of populations, morphotypes adapted to novel conditions by altering the expression of life-history traits. The observed switches in the phenotypic structure of <i>B. longirostris</i> suggest that the persistence of morphotypes with different life histories is beneficial to populations colonising varying environments and their relative abundances in a population are conditioned by the diverseness of local stressors.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"104 5-6","pages":"137-146"},"PeriodicalIF":1.9,"publicationDate":"2019-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201901985","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92293935","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":"Comparison of trophic structure of fish assemblages in two tropical streams in Sri Lanka: A seasonal dry-zone stream and a perennial wet-zone stream","authors":"Wasantha S. Weliange,&nbsp;Upali S. Amarasinghe,&nbsp;Jacobus Vijverberg,&nbsp;Maria Leichtfried,&nbsp;Leopold Füreder","doi":"10.1002/iroh.201601867","DOIUrl":"10.1002/iroh.201601867","url":null,"abstract":"<p>Most tropical rivers, especially in the Asian region, are severely impacted by various human perturbations and the diverse habitats in streams support rich invertebrate and vertebrate communities. It is hypothesized that the fish assemblages and their dietary structure in two tropical streams differ because they flow through different terrains and are exposed to different climatic conditions. In the wet-zone stream, which is geomorphologically more complex, fish faunal diversity showed a significant variation and presence of endemic fish species. In the diets of fish, the taxonomic composition was different along the longitudinal gradients, but dietary taxa richness in the two streams was virtually similar having 32 dietary taxa in the wet-zone stream and 36 taxa in the dry-zone stream. In the wet-zone stream, we observed a lower proportion of specialist feeding species than those in the dry-zone stream. Trophic indices of individual species in fish assemblages ranging from herbivory to carnivory also indicate structuring of fish communities along the longitudinal gradients of the two streams based on the dietary structure. The main differences between the fish assemblages in the wet zone compared with the dry zone were the higher number of endemic species and the lower percentage of specialist feeders with higher trophic indices. The outcome of this study, hopefully, contributes to planning future biodiversity conservation management schemes under various river-basin development strategies.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"104 3-4","pages":"80-93"},"PeriodicalIF":1.9,"publicationDate":"2019-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201601867","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45507927","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":"Mortality of downstream migrating European eel at power stations can be low when turbine mortality is eliminated by protection measures and safe bypass routes are available","authors":"Finn Økland,&nbsp;Torgeir B. Havn,&nbsp;Eva B. Thorstad,&nbsp;Lisa Heermann,&nbsp;Stein Are Sæther,&nbsp;Meelis Tambets,&nbsp;Maxim A. K. Teichert,&nbsp;Jost Borcherding","doi":"10.1002/iroh.201801975","DOIUrl":"10.1002/iroh.201801975","url":null,"abstract":"<p>The abundance of the European eel has seriously declined during recent decades. Hydropower production is one of the main threats, and solutions at power stations are needed to reduce the mortality of the downstream migrating silver eel. We examined the mortality, migration routes, and behavior of silver eel at a power station in Germany, after the power station was rebuilt to reduce the mortality of downstream migrating fish. Of 270 eels implanted with radio transmitters and released upstream of the power station, 222 eels passed the power station, primarily in October and November, although some descended during winter and spring. Most eels followed the main flow and passed over the spillway gate (59% and 49% in the 2 study years) or followed the route toward the bar racks in front of the turbines (24% and 27%), where they were guided to a route outside the turbines via the flushing channel. Some eels used the vertical slot fish passage (12% and 8%), whereas few used a nature-like fishway, canoe pass, or custom-made bypasses for eel. The eels showed large individual variation in migration timing, migration speeds, and choice of bypass. No eels were killed in the turbines, as none passed through them, likely due to the narrow bar spacing of the racks (10 mm). The results demonstrated that the mortality of eel passing power stations can be low (0–4% and 0–8% in the 2 study years) when the turbine intake is covered by racks hindering eels from entering turbines and safe bypass routes are available. Mortality estimates are given as ranges because the fate of 4% and 8% of the individuals could not be determined. Potential mortality could have been related to injuries in the bypass routes or increased predation risk, but there were no indications of injuries caused by installations in any of the bypass routes.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"104 3-4","pages":"68-79"},"PeriodicalIF":1.9,"publicationDate":"2019-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201801975","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47950108","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":"Dissolved organic N in shallow tropical lakes and reservoirs: Contribution to total dissolved N and relationships with eutrophication","authors":"Iola Gonçalves Boëchat,&nbsp;Aparecida Beatriz das Mercês Paiva-Magela,&nbsp;Helbert Rocha Reis,&nbsp;Björn Gücker","doi":"10.1002/iroh.201801958","DOIUrl":"10.1002/iroh.201801958","url":null,"abstract":"<p>Dissolved organic nitrogen (DON) plays important biogeochemical and ecological roles in aquatic systems. However, little is known about its importance in small tropical lakes and reservoirs. We hypothesized that (a) DON is higher in these systems than dissolved inorganic N (DIN), and that (b) relative contributions of DON and DIN to the total dissolved nitrogen (TDN) pool decrease and increase, respectively, with trophic status. To test these hypotheses, we measured DON and DIN in six lakes and two reservoirs at the Atlantic forest-Cerrado savanna transition in Southeast Brazil, in the rainy and the dry season. With one exception in each season, all oligo- and mesotrophic systems had DON:DIN ratios &gt;1. DON:DIN ratios were negatively correlated with total phosphorus (TP). This pattern was due to high DIN, mainly ammonium, in eutrophic and hypertrophic systems. DON:DIN ratios &lt;1 occurred at TP higher than 103 and 104 µg L⁻¹ in the rainy and dry season, respectively. We found a general dominance of DON in near-natural lentic systems at the Atlantic forest-Cerrado savanna transition, which was more pronounced than that reported for other regions. Human alterations to the TDN pool may affect biological communities and ecosystem functioning of these systems.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"104 5-6","pages":"106-115"},"PeriodicalIF":1.9,"publicationDate":"2019-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201801958","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46249250","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}