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Correction to: The intertidal mudflats of Barr Al Hikman, Sultanate of Oman, as feeding, reproduction and nursery grounds for brachyuran crabs Hydrobiologia (IF 2.385) Pub Date : 2020-12-22 Roeland A. Bom, Jan A. van Gils, Karen Molenaar, Andy Y. Kwarteng, Reginald Victor, Eelke O. Folmer
In the above mentioned publication, incorrect values for P. segnis are shown on the right hand side of Fig. 4. The correct version of Fig. 4 and its caption is published here.
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A systematic revision of the five-spotted Hemichromis complex (Cichliformes: Cichlidae) from West Africa and Lower Guinea, with the description of a new species from Cameroon Hydrobiologia (IF 2.385) Pub Date : 2021-01-22 Arnold Roger Bitja-Nyom, Jean-François Agnèse, Antoine Pariselle, Charles Félix Bilong-Bilong, André Gilles, Jos Snoeks
The group of large five-spotted Hemichromis species from West Africa and Lower Guinea was revised using an integrative approach combining morphometry (measurements, meristics and colour patterns) and genetics (cytochrome b gene). Specimens from 100 populations were sorted into three main groups on the basis of morphological criteria. Samples from Lake Bosumtwi clustered together with others from West
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Abiotic factors driving cyanobacterial biomass and composition under perennial bloom conditions in tropical latitudes Hydrobiologia (IF 2.385) Pub Date : 2021-01-18 Rayane F. Vanderley, Kemal A. Ger, Vanessa Becker, Maria Gabriela T. A. Bezerra, Renata Panosso
While warming and eutrophication have increased the frequency and magnitude of harmful cyanobacterial blooms globally, the scenario for many eutrophic tropical freshwaters is a perennial year-round bloom. Yet, the drivers of persistent blooms are less understood when conditions such as light, temperature, and nutrients favor cyanobacteria growth year-round, and especially in regions facing recurrent
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Towards global dominance of invasive alien plants in freshwater ecosystems: the dawn of the Exocene? Hydrobiologia (IF 2.385) Pub Date : 2021-01-18 Rossano Bolpagni
The global and seemingly unstoppable spread of invasive alien plants emerges as one of the main topics of current science. This is due to the multiple repercussions of invasive plants on biodiversity and ecosystem functioning, plus huge consequences on human existence. In freshwaters, lots of invaders are extremely competitive by virtue of their idiosyncratic reproductive and adaptive strategies. As
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Effects of nuisance submerged vegetation on the fauna in Norwegian rivers Hydrobiologia (IF 2.385) Pub Date : 2021-01-18 Gaute Velle, Helge Skoglund, Bjørn T. Barlaup
The abundance of aquatic vegetation is increasing in rivers and lakes worldwide. The aim of this study was to find how the macrophyte Juncus bulbosus Linnaeus affects salmonids and benthic macroinvertebrates in Norwegian rivers. The proliferation of J. bulbosus in the study rivers commenced after the development of hydropower in the 1960s and 1970s. J. bulbosus is now considered a nuisance for humans
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Life-history traits display strong associations to genome size in annelids Hydrobiologia (IF 2.385) Pub Date : 2021-01-18 Nicholas Beaudreau, Gloria Massamba-N’Siala, Claude Belzile, Piero Calosi, France Dufresne
Genome size, known also as the C-value, has been proposed as an important determinant of life-history variation in numerous animal taxa. We assessed the relationships between genome size and fitness-related life-history traits in six species of interstitial marine annelids of the genus Ophryotrocha. Life-history traits and genome size data obtained from 18 additional annelid species were included in
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Impacts of different monoculture types on stream benthic macroinvertebrate and fish communities Hydrobiologia (IF 2.385) Pub Date : 2021-01-14 Pedro Sartori Manoel, Virginia Sanches Uieda
Agribusiness is one of the main economic activities in Brazil, which caused the removal of much of its natural vegetation for the expansion of monoculture areas. Once aquatic environments have a direct relationship with the surrounding terrestrial environment, it is essential to understand the monocultures’ impact on adjacent streams and, especially, how aquatic communities react to these impacts.
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Correction to: Non-indigenous species along the Israeli Mediterranean coast: tally, policy, outlook Hydrobiologia (IF 2.385) Pub Date : 2021-01-12 Bella S. Galil, Henk K. Mienis, Razy Hoffman, Menachem Goren
After publication of the above mentioned article, previously undisclosed material was made available resulting in an altered population status for the below mentioned species:
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Testing the short-term effects of a fish invader on the trophic ecology of a closely related species Hydrobiologia (IF 2.385) Pub Date : 2021-01-09 Jeferson R. Amaral, Luisa R. Manna, Rosana Mazzoni, Vinicius Neres-Lima, Piatã S. Marques, Rana W. El-Sabaawi, Eugenia Zandonà
The effects of invaders on native species are usually tested using species mean trait values over long time scales. However, considering individual variation over short timescales can help us better understand the interaction between invaders and native species. We compared trophic traits of the non-native guppy (Poecilia reticulata) and the native Brazilian poeciliid Phalloceros harpagos using experiments
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Categorizing the influences of two large seabird colonies on island freshwater ecosystems in the Northwest Atlantic Ocean Hydrobiologia (IF 2.385) Pub Date : 2021-01-07 Matthew P. Duda, Neal Michelutti, Xiaowa Wang, John P. Smol
Seabird colonies influence ecosystems by releasing high concentrations of nutrients, metals, and contaminants via their wastes. Here, we examined seven lentic waterbodies impacted by two major colonies of Leach’s Storm-petrel (Hydrobates leucorhous), six from Baccalieu Island, Newfoundland and Labrador with ~ 1.95 million breeding pairs, and another from Grand Colombier Island, St. Pierre and Miquelon
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Competition induces silver spoon effects in developing anuran larvae Hydrobiologia (IF 2.385) Pub Date : 2021-01-07 Samantha M. Bonifas, Sarah S. Bouchard
Early life conditions can have lifelong impacts on survival and fitness. Silver spoon effects occur when favorable early life conditions provide advantages through adulthood, even if conditions worsen. Alternatively, compensatory growth allows organisms initially reared in unfavorable conditions to grow more quickly than expected should conditions improve. We examined these possibilities in the American
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Artificially generated turbulence: a review of phycological nanocosm, microcosm, and mesocosm experiments Hydrobiologia (IF 2.385) Pub Date : 2021-01-07 Russell N. Arnott, Mehdi Cherif, Lee D. Bryant, Danielle J. Wain
Building on a summary of how turbulence influences biological systems, we reviewed key phytoplankton-turbulence laboratory experiments (after Peters and Redondo in Scientia Marina: Lectures on plankton and turbulence, International Centre for Coastal Resources, Barcelona, 1997) and Peters and Marrasé (Marine Ecology Progress Series 205:291–306, 2000) to provide a current overview of artificial turbulence
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Effect of clonal fragmentation on the growth of Vallisneria natan s (Lour.) Hara at contrasting nutrient and light conditions Hydrobiologia (IF 2.385) Pub Date : 2021-01-06 Hui Peng, Dabing Ge, Guixiang Yuan, Dongsheng Zou, Hui Fu, Erik Jeppesen
Clonal fragmentation (CF), caused by various disturbances, significantly affects the growth performance of plants. However, little is known about how CF affects the growth of submersed macrophytes facing light limitation and nutrient enrichment, a typically situation found in eutrophic lakes. To examine the effects of CF on Vallisneria natans (Lour.) Hara, a common submersed macrophyte species in warm
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Fishers’ ecological knowledge on the reproduction of fish and shrimp in a subtropical coastal ecosystem Hydrobiologia (IF 2.385) Pub Date : 2021-01-06 Moisés Ubiratã Schmitz Nunes, Olímpio Rafael Cardoso, Marcelo Soeth, Renato Azevedo Matias Silvano, Luís Fernando Fávaro
Fishers’ ecological knowledge (FEK) has contributed to a better understanding about the reproduction of fishery resources, especially where biological data are scarce or unavailable. We analyzed FEK on the reproduction of five fishery resources in the Paranaguá estuarine complex and adjacent coastal area, Brazil, including fishes (Genidens barbus, Centropomus parallelus, Chaetodipterus faber, Pseudobatos
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Macrophyte diversity alters invertebrate community and fish diet Hydrobiologia (IF 2.385) Pub Date : 2021-01-05 Katia Yasuko Yofukuji, Ana Lúcia Paz Cardozo, Bárbara Angélio Quirino, Matheus Henrique Ferreira Aleixo, Rosemara Fugi
The diversity of aquatic macrophytes can offer different local conditions required to support an increased number of microhabitats, therefore resulting in diverse biotic communities. This study assessed the influence of macrophyte diversity on the ecological attributes of the associated invertebrates (diversity, richness and abundance), as well as the diet composition of a small fish, Moenkhausia forestii
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Impacts of inter-basin water transfer on the water quality of receiving reservoirs in a tropical semi-arid region Hydrobiologia (IF 2.385) Pub Date : 2021-01-04 José Etham de Lucena Barbosa, Juliana dos Santos Severiano, Hérika Cavalcante, Daniely de Lucena-Silva, Camila Ferreira Mendes, Vanessa Virgínia Barbosa, Ranielle Daiana dos Santos Silva, Dayany Aguiar de Oliveira, Joseline Molozzi
Inter-basin water transfer (IBWT) involves the transport of water from one geographically distinct basin to another to balance the distribution of water resources. Although the socio-economic benefits of implementing these projects are well recognized, little is known about the subsequent effects on the water quality of the receiving systems. We evaluated the effects of an IBWT on the water quality
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Trophic niches of three sympatric invasive crayfish of EU concern Hydrobiologia (IF 2.385) Pub Date : 2021-01-04 Lukáš Veselý, Timo J. Ruokonen, András Weiperth, Jan Kubec, Bettina Szajbert, Wei Guo, Fabio Ercoli, Martin Bláha, Miloš Buřič, Heikki Hämäläinen, Antonín Kouba
The spread of non-native species results in novel and often unexpected assemblages. Using stable isotopes, we disentangled the trophic relationships between three invasive crayfish species at two sites of a small thermal tributary of the Barát stream, Hungary. We studied Procambarus virginalis and Faxonius limosus living in sympatry in the upper section of this thermal tributary, and then an assemblage
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Restoration-mediated alteration induces substantial structural changes, but negligible shifts in functional and phylogenetic diversity of a non-target community: a case study from a soda pan Hydrobiologia (IF 2.385) Pub Date : 2021-01-04 Pál Boda, Tamás Bozóki, Eszter Á. Krasznai-K., Gábor Várbíró, Arnold Móra, Zoltán Csabai
Stream macroinvertebrates, as non-target organisms, may face with either a single or a complex stressor during a restoration treatment. We quantified the structural, phylogenetic, and functional responses to both single (water retention) and complex (water retention and grazing) stressors and analysed how the ecological quality changes, in order to reveal the potential unwanted consequences in a soda
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Intraspecific differences of Asian/Australian Phragmites australis subgroups reveal no potentially invasive traits Hydrobiologia (IF 2.385) Pub Date : 2021-01-03 Liujuan Xie, Emil Jespersen, Siyuan Ye, Lixin Pei, Huijia Song, Xiao Guo, Weihua Guo, Hans Brix, Franziska Eller
Phragmites australis is a cosmopolitan plant species with high intraspecific diversity and phenotypic plasticity. Due to its variability and large ecological niche breadth, subgroups of P. australis have become invasive in North America, and this invasion has been recognized late. While this cryptic invasion on the American continent has received much attention, little is known about the potential
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Effects of biological behaviors of benthic bivalve ( Corbicula japonica ) on its passive transport Hydrobiologia (IF 2.385) Pub Date : 2021-01-03 Hiroshi Yajima, Ryohei Morohara, Masaki Yamada
The bivalve Corbicula japonica is a popular food in Japan. The abundance of the clam in a lake changes over time. Clam transport is assumed to be passive even after the clam’s settlement. But it is not clear whether clams can be considered like sand particles, or whether biological features of the clams affect their movement. Features of clams that differ from sediment particles and may affect movement
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Possible predation on commercial bivalves by Tachypleus gigas : an assessment of horseshoe crab reintroduction in Setiu Lagoon of Terengganu, Malaysia Hydrobiologia (IF 2.385) Pub Date : 2021-01-03 Anis Syahira Abdul Halim, Faridah Mohamad, Fisal Ahmad, Noraznawati Ismail, Tuan Zainazor Tuan Chilek, Ahmad Shamsuddin Ahmad, Zaidi Che Cob, Ku Mohd Kalkausar Ku Yusof
The population of horseshoe crabs, Tachypleus gigas, in Malaysian waters is declining due to overexploitation, pollution, and loss of natural habitats. As an initiative to increase their population, adult T. gigas were reintroduced in Setiu lagoon, Terengganu. In the interest of sustainable management of bivalve resources in that area, feeding experiments were carried out to determine quantity consumption
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Sex-based divergence in isotopic compositions of north temperate freshwater fishes Hydrobiologia (IF 2.385) Pub Date : 2021-01-03 T. A. Johnston, J. M. Casselman, W. C. Leggett
Differences in reproductive allocation of male and female fishes could lead to sexual divergence in nutritional requirements, trophic ecologies, and metabolisms that may be reflected in isotopic compositions. We compared muscle C:N ratio, δ13C, and δ15N between mature females and males for eight fish species from 21 North American populations. We also compared isotopic compositions between muscle and
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A stream by any other name: does β-diversity differ between Nearctic and Neotropical streams? Hydrobiologia (IF 2.385) Pub Date : 2021-01-03 John W. McCreadie, Neusa Hamada, Maria E. Grillet, Peter H. Adler
Beta diversity typically increases with decreasing latitude, with explanations of this pattern often based on tropical origins of most clades. Black flies (Diptera: Simuliidae) are at odds with this trend, having a northern origin. Increasing β-diversity with decreasing latitude might also be a product of changes in causal mechanisms structuring local assemblages among biogeographical realms. We tested
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Geographical and temporal patterns of cyanobacterial assemblages in the Danube Delta lake complexes Hydrobiologia (IF 2.385) Pub Date : 2021-01-03 Maria Iasmina Moza, Carmen Postolache, Ana Maria Benedek, Mirela Moldoveanu, Piet Spaak
Danube Delta shallow lakes experience cyanobacteria blooms that can negatively affect the aquatic ecosystem. Although there are several studies on Danube Delta cyanobacteria, little is known about their spatial–temporal patterns and the potential predictive role they can offer. We therefore analyzed the distribution of cyanobacteria in 19 lakes belonging to three lake complexes and tested whether their
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Charrs of the genus Salvelinus (Salmonidae): hybridization, phylogeny and evolution Hydrobiologia (IF 2.385) Pub Date : 2021-01-03 Alexander G. Osinov, Alexander A. Volkov, Nikolai S. Mugue
Evolutionary history, systematics and taxonomy of charrs of the genus Salvelinus and especially of the representatives of the S. alpinus–S. malma species complex remain confused that is connected with a substantial ecological and morphological flexibility of this group and with supposed ancient hybridization between some taxa. For the analysis of phylogenetic relationships and introgressive hybridization
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Following the Mangroves: diversification in the banded lampeye Aplocheilichthys spilauchen (Duméril, 1861) (Cyprinodontiformes: Procatopodidae) along the Atlantic coast of Africa Hydrobiologia (IF 2.385) Pub Date : 2021-01-03 P. H. N. Bragança, J. Van der Zee, A. Chakona, R. C. Schmidt, M. L. J. Stiassny
Available ecological information, an extensive distributional range, conflicting osteological data, and a proposed early Miocene origin provide the impetus for the present study which investigates genetic structuring, biogeographic, and phylogenetic relationships within the Aplocheilichthys spilauchen lineage. Through the analysis of the mitochondrial gene COI, species delimitation methods (ABGD, GB
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The ups and downs of hydropeaking: a Canadian perspective on the need for, and ecological costs of, peaking hydropower production Hydrobiologia (IF 2.385) Pub Date : 2021-01-03 K. E. Smokorowski
Hydropeaking refers to the mode of hydropower dam operation where sub-daily changes in flow are used to vary the generation of electricity in accordance with demand. A typical pattern produces maximum power during the day (i.e., the peak), and minimal power at night. Hydropeaking is considered necessary to stabilize the energy grid since it is the only reliably flexible method of producing electricity
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Staining of subfossil chironomid head capsules: a method for improving the extraction process from lake sediments and peat Hydrobiologia (IF 2.385) Pub Date : 2021-01-02 Yanmin Cao, Zijie Zheng, Xuan Luo, Peter G. Langdon, Zhe Dai, Anqi Zhou
Subfossil chironomids are regarded as a useful biological proxy for palaeoenvironmental research, but picking chironomid head capsules from aquatic sediments is extremely time-consuming. This is often the case for finding and isolating small head capsules from the deflocculated sediment. In this study, two stains (aniline blue and cotton blue) were used to dye chironomid head capsules in lake and peat
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The effects of food quantity, light, and temperature on clearance rates in freshwater bivalves (Cyrenidae and Unionidae) Hydrobiologia (IF 2.385) Pub Date : 2021-01-02 Simon Pouil, Amber Hills, Teresa J. Mathews
Assessing the environmental variables that influence freshwater bivalve filtration activity is key to better understand the functioning of stream ecosystems. In the present study, the effects of light (0 ± 0 µmol m−2 s−1 and 19 ± 2 µmol m−2 s−1) and temperature (10, 15, 20 and 25°C) on the clearance rates of two bivalve species: the Asian clam Corbicula fluminea (Cyrenidae) and pocketbook Lampsilis
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Courting danger: socially dominant fish adjust their escape behavior and compensate for increased conspicuousness to avian predators Hydrobiologia (IF 2.385) Pub Date : 2021-01-02 Keith W. Whitaker, Marcos Alvarez, Thomas Preuss, Molly E. Cummings, Hans A. Hofmann
Males of many species display conspicuous colors to attract mates and deter rivals, although this benefit can incur an increased predation risk. In the African cichlid fish, Astatotilapia burtoni, males can change both their social status (dominant, DOM, or subordinate, SUB) and primary body color (yellow or blue). We hypothesized that these phenotypes vary in conspicuousness to predators and conspecifics
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Seasonal variations in food web dynamics of floodplain lakes with contrasting hydrological connectivity in the Southern Gulf of Mexico Hydrobiologia (IF 2.385) Pub Date : 2021-01-02 Matteo Cazzanelli, Miriam Soria-Barreto, María Mercedes Castillo, Rocío Rodiles-Hernández
Floodplains are some of the most productive and diverse ecosystems on Earth. The Usumacinta River Basin, in the Southern Gulf of Mexico, hosts several floodplain lakes, whose integrity is threatened by water resource development. We aimed to investigate how food webs in these ecosystems vary in relation to their hydrological connectivity and seasonal flood cycles. To do this, we combined analysis of
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Shorter, warmer winters may inhibit production of ephyrae in a population of the moon jellyfish Aurelia aurita Hydrobiologia (IF 2.385) Pub Date : 2020-12-14 Alexandra Loveridge, Cathy H. Lucas, Kylie A. Pitt
Scyphozoan jellyfish blooms display high interannual variability in terms of timing of appearance and size of the bloom. To understand the causes of this variability, the conditions experienced by the polyps prior to the production of ephyrae in the spring were examined. Polyps reared from planula larvae of Aurelia aurita medusae collected from southern England (50°49′58.8; − 1°05′36.9) were incubated
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Effects of phosphorus control on primary productivity and deep-water oxygenation: insights from Lake Lugano (Switzerland and Italy) Hydrobiologia (IF 2.385) Pub Date : 2020-12-06 Fabio Lepori, Camilla Capelli
Attempts to restore Lake Lugano, Switzerland and Italy, from eutrophication have produced weak responses in the target variables (primary productivity and hypolimnetic oxygen concentrations), indicating shortcomings in the underlying eutrophication model. An analysis of monitoring data showed that the decrease in phosphorus concentration, although nearly compliant with restoration targets, produced
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Nest-site selection in a fish species with paternal care Hydrobiologia (IF 2.385) Pub Date : 2020-12-04 Theo C. M. Bakker, Beat Mundwiler
Fish that perform paternal care may increase their fitness by choosing nest sites that enhance survival and development of embryos. We studied nest-site choice with respect to dissolved oxygen concentration and water temperature in males of the three-spined stickleback (Gasterosteus aculeatus), a small fish species with exclusive male parental care that usually breeds in the littoral zone of freshwaters
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Environmental assessment of Neotropical streams using fish as bioindicators: a multibiomarker and integrated approach Hydrobiologia (IF 2.385) Pub Date : 2020-11-30 Nédia de Castilhos Ghisi, Crislei Larentis, Elton Celton de Oliveira, Mayara Pereira Neves, Arielli Giachini Zavaski, Aliciane de Almeida Roque, Catia Cappelli Wachtel, Ana Paula da Silva, Emanuele Barreto Stange de Lima, Giovanni de Oliveira Nagasawa Costa, Joao Paulo de Arruda Amorim, Ciro Alberto de Oliveira Ribeiro, Rosilene Luciana Delariva
Freshwater ecosystems are among the most threatened habitats on Earth, due mainly to anthropogenic pollutants made up of complex mixtures. The Iguaçu River is world famous for the Iguaçu Falls and highlighted by its endemism. Unfortunately, it is considered the second most polluted urban river in Brazil. We aimed to perform an environmental evaluation of Neotropical streams in the Iguaçu River basin
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High rates of biodeposition and N-excretion indicate strong functional effects of mussels (Bivalvia: Unionida) in certain anthropogenic tropical freshwater habitats Hydrobiologia (IF 2.385) Pub Date : 2020-11-28 Alexandra Zieritz, Wei Ning Chan, Suzanne McGowan, Christopher Gibbins
The functional roles of freshwater mussels (Unionida) in tropical systems are poorly understood. We quantified the effects of mussel filtration, excretion and deposition in three anthropogenic tropical systems, i.e. a man-made lake, abandoned mining pool and rice paddy channel. Sinanodonta cf. woodiana (non-native) was present at all three sites, whilst Pilsbryoconcha compressa (native) was present
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Seasonal and El Niño Southern Oscillation-driven variations in isotopic and elemental patterns among estuarine primary producers: implications for ecological studies Hydrobiologia (IF 2.385) Pub Date : 2020-11-25 Marianna Lanari, Bianca Possamai, Margareth da Silva Copertino, Alexandre Miranda Garcia
Estuaries are complex systems where environmental fluctuations occur over distinct timescales due to local meteorological and large-scale climatic factors. Consequently, studies with low temporal resolution and taxonomic coverage may fail to detect isotopic variations in basal sources, providing biased interpretations of isotope mixing models. We investigated the seasonal and El Niño Southern Oscillation
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Influence of competition and predation on survival of the hydrilla tip mining midge and its success as a potential augmentative biological control agent of hydrilla Hydrobiologia (IF 2.385) Pub Date : 2020-11-23 Courtney Stachowiak, Julie Baniszewski, James P. Cuda, Colette St. Mary, Emma N. I. Weeks
Hydrilla verticillata is an aquatic weed that grows densely throughout the water column and is costly to manage. The hydrilla tip mining midge, Cricotopus lebetis, a potential augmentative biological control agent of hydrilla, feeds on the apical meristem preventing growth. The goal of this study was to quantify the influence of a predator (mosquitofish, Gambusia sp.) and a competitor (hydrilla leafcutter
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Estimating salinity stress via hsp70 expression in the invasive round goby ( Neogobius melanostomus ): implications for further range expansion Hydrobiologia (IF 2.385) Pub Date : 2020-11-17 R. Puntila-Dodd, D. Bekkevold, J. W. Behrens
Species invasions often occur on coasts and estuaries where abiotic conditions vary, e.g. salinity, temperature, runoff etc. Successful establishment and dispersal of non-indigenous species in many such systems are poorly understood, partially since the species tend to show genetic and ecological plasticity at population level towards many abiotic conditions, including salinity tolerance. Plasticity
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Preface: Restoration of eutrophic lakes: current practices and future challenges Hydrobiologia (IF 2.385) Pub Date : 2020-11-16 Tom Jilbert, Raoul-Marie Couture, Brian J. Huser, Kalevi Salonen
Eutrophication of lake ecosystems is a pervasive global environmental problem, exacerbated by urbanization, industrialization, and intensification of agriculture. Excess loading of the macronutrients nitrogen and phosphorus from a myriad of human activities in catchment areas has forced many lake ecosystems into turbid, eutrophic states from which natural recovery is slow. A wide array of tools is
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Polyunsaturated fatty acids in fish tissues more closely resemble algal than terrestrial diet sources Hydrobiologia (IF 2.385) Pub Date : 2020-11-16 Nadine Ebm, Fen Guo, Michael T. Brett, Stuart E. Bunn, Martin J. Kainz
The River Continuum Concept implies that consumers in headwater streams have greater dietary access to terrestrial basal resources, but recent studies have highlighted the dietary importance of high-quality algae. Algae provide consumers with physiologically important omega-3 (n-3) polyunsaturated fatty acids (PUFA), particularly eicosapentaenoic acid (EPA). However, terrestrial plants and most benthic
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Intraspecific morphological variation in Cichlidogyrus (Monogenea) parasitizing two cichlid hosts from Lake Tanganyika exhibiting different dispersal capacities Hydrobiologia (IF 2.385) Pub Date : 2020-11-08 Chahrazed Rahmouni, Maarten Van Steenberge, Maarten P. M. Vanhove, Andrea Šimková
As parasites depend on their hosts and play a significant role in their ecology and evolution, we hypothesized an association between the host dispersal capacity and the intraspecific variability of their host-specific parasites. We investigated the morphological variability of the gill monogeneans Cichlidogyrus gistelincki and C. milangelnari parasitizing the Tanganyika cichlids ‘Ctenochromis’ horei
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Decades needed for ecosystem components to respond to a sharp and drastic phosphorus load reduction Hydrobiologia (IF 2.385) Pub Date : 2020-11-08 Ingrid Chorus, Antje Köhler, Camilla Beulker, Jutta Fastner, Klaus van de Weyer, Tilo Hegewald, Michael Hupfer
Lake Tegel is an extreme case of restoration: inflow treatment reduced its main external phosphorus (TP) load 40-fold, sharply focused in time, and low-P water flushed the lake volume ≈ 4 times per year. We analysed 35 years of data for the time TP concentrations took to decline from ≈ 700 to 20–30 µg/l, biota to respond and cyanobacteria to become negligible. The internal load proved of minor relevance
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High connectivity and migration potentiate the invasion of Limnoperna fortunei (Mollusca: Mytilidae) in South America Hydrobiologia (IF 2.385) Pub Date : 2020-11-08 Sandra Ludwig, Eloisa H. R. Sari, Hugo Paixão, Lângia C. Montresor, Juliano Araújo, Cristiana F. A. Brito, Gustavo Darrigran, Almir R. Pepato, Teofânia H. D. A. Vidigal, Carlos B. Martinez
Even after almost 30 years of Limnoperna fortunei introduction into South America, it is still unclear how the source and propagules are connected. Here, we present genetic evidence of population connectivity and gene flow of L. fortunei propagules from Asia into South America, proposing the main invasion routes into South America. To achieve that we expanded the sampling effort to cover all occurrence
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Mobile piscivores and the nature of top-down forcing in Upper Amazonian floodplain lakes Hydrobiologia (IF 2.385) Pub Date : 2020-11-08 John Terborgh, Lisa Davenport
Shallow lakes can change states in response to manipulations of top predators. In most reported experiments, the top piscivore has been a fish. However, low-latitude lakes typically support non-piscine piscivores, including mammals, birds, and reptiles. The roles of these groups have been little investigated, and whether they are more important as piscivores than fish remains unknown. We report both
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Drivers assessment of zooplankton grazing on phytoplankton under different scenarios of fish predation and turbidity in an in situ mesocosm experiment Hydrobiologia (IF 2.385) Pub Date : 2020-11-07 Diego Frau, María Florencia Gutierrez, Florencia Rojas Molina, Franco Teixeira de Mello
Zooplankton play a key role in energy transfer within lake food webs, but we have a poor knowledge concerning their role as phytoplankton grazers in shallow subtropical lakes. In this study, we aimed to determine how zooplankton grazing upon phytoplankton is altered in different scenarios of fish predation and turbidity, and we explored the relevance of grazing compared to other environmental variables
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Variable shrimp in variable environments: reproductive investment within Palaemon varians Hydrobiologia (IF 2.385) Pub Date : 2020-11-06 Andrew Oliphant, Sven Thatje
The maternal environment may influence the quantity and quality of resources invested in offspring (per-offspring provisioning) and this trait, in turn, affects larval fitness and may carry-over into early juvenile life. Here, per-offspring investment was measured across three consecutive breeding seasons for the caridean shrimp, Palaemon varians. Egg and hatchling larval dry weight as well as hatchling
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In situ river experiments to explore variability in Microcoleus autumnalis mat expansion Hydrobiologia (IF 2.385) Pub Date : 2020-11-06 Georgia Thomson-Laing, Niamh Dyer, Ruby Whyte-Wilding, Susanna A. Wood
Proliferations of benthic mats dominated by anatoxin-producing Microcoleus autumnalis (basionym Phormidium autumnale) pose an increasing health risk to human and animals worldwide. This study assessed M. autumnalis mats in two in situ experiments undertaken at three spatial scales: (1) reach-scale along a river; (2) reach-scale, focusing on two sites upstream and downstream of a tributary with substantial
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The effect of riverine networks on fish β-diversity patterns in a Neotropical system Hydrobiologia (IF 2.385) Pub Date : 2020-11-06 Rodrigo A. Carvalho, Fabrício B. Teresa, Francisco L. Tejerina-Garro
We investigated how the riverine network influences taxonomic and functional beta diversity patterns of fish assemblages in the mainstem/headwater (lateral) and upstream/downstream (longitudinal) gradients in a Neotropical river system. We investigated the following questions: which component (turnover or nestedness) explains taxonomic and functional beta diversity in both gradients? Is this component
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The invasion of an alien characiform fish and the decline of a native congener in a Neotropical river-floodplain system Hydrobiologia (IF 2.385) Pub Date : 2020-11-04 Maria Julia Mileo Ganassin, Emili García-Berthou, Amanda Cantarute Rodrigues, Carolina Pedrozo do Nascimento, Carolina Mendes Muniz, Matheus Tenório Baumgartner, Marcelo Henrique Schmitz, Luiz Carlos Gomes
Using a long time series, we analyzed trends in abundance of two characiform fishes in the upper Paraná River and its floodplain: the native Schizodon altoparanae and its alien congener Schizodon borellii, which invaded the floodplain in the last decades. We aimed to contribute to the understanding of the invasive species success and its relationship with its native congener. We compared feeding-related
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Comparative functional responses predict the predatory impact of the highly invasive fish Cichla kelberi Hydrobiologia (IF 2.385) Pub Date : 2020-11-03 Thiago Lima Carvalho, Eveline de Almeida Ferreira, Fernando Mayer Pelicice, Rodrigo Fernandes
Peacock basses (genus Cichla) are a group of Amazonian predatory fishes that invaded many systems worldwide. Severe ecological impacts have been reported, but no study investigated the functional response of these fishes to variations in prey abundance, a crucial information to determine predator consumption and impact. In this study, we evaluated the functional response of the highly invasive Cichla
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The biogeographic history of the relictual Gondwanan lineage of Australian burrowing crayfish Hydrobiologia (IF 2.385) Pub Date : 2020-11-03 Kathryn L. Dawkins, James M. Furse, Jane M. Hughes
Biogeographic investigations of Gondwanan mesic Australian fauna are scarce. The burrowing clade of Australian freshwater crayfish represent an ideal group to provide biogeographic inferences, due to their extensive distribution across the continent and their presumed ancient origin. This study tested the competing hypotheses of a ‘early’ versus ‘late’ origin of this clade, coinciding with the early
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A new morph of Telmatochromis temporalis (Cichlidae; Cichliformes) from Lake Tanganyika Hydrobiologia (IF 2.385) Pub Date : 2020-11-02 Tetsumi Takahashi
Telmatochromis temporalis is a cichlid fish endemic to Lake Tanganyika. Two morphs of this species, normal and dwarf, form a good model for the study of ecological speciation through divergent natural selection on body size. This study reports a third morph of this species, slender morph, which was collected from deep waters off Kasenga, Zambia, whereas the normal morph inhabits shallow waters of the
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Variation of thermal plasticity for functional traits between populations of an invasive aquatic plant from two climatic regions Hydrobiologia (IF 2.385) Pub Date : 2020-11-02 Gabrielle Thiébaut, Michèle Tarayre, Olivier Jambon, Nathalie Le Bris, Hervé Colinet, David Renault
Temperature inducible phenotypic plasticity is a major player in plant responses to climate warming. Functional responses and their role in determining thermal plasticity of plants remain poorly understood. Our objective was to compare trait responses of six populations of Ludwigia peploides resulting from seed from Oceanic climate and from Mediterranean climate after an exposure at three temperatures
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Exceeding its own limits: range expansion in Argentina of the globally invasive apple snail Pomacea canaliculata Hydrobiologia (IF 2.385) Pub Date : 2020-10-30 M. E. Seuffert, P. R. Martín
Pomacea canaliculata is a freshwater snail native to southern South America. The aims of this work are to update its distribution in Argentina and to analyze through niche models whether the environmental conditions from its original distribution can anticipate its recently expanded range. Almost all records of P. canaliculata before 1958 (original records) belong to del Plata or connected basins.
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Individual variability in stable isotope turnover rates of epidermal mucus according to body size in an omnivorous fish Hydrobiologia (IF 2.385) Pub Date : 2020-10-29 Emily R. Winter, J. Robert Britton
Epidermal mucus (‘mucus’) is increasingly applied to fish ecological studies based on stable isotope analysis (SIA) due to its non-invasive collection. However, knowledge on mucus SI turnover rates of individual fish remains limited, including uncertainty over how they are influenced by fish body sizes. Here, a diet switch experiment predicted mucus SI turnover rates (δ13C and δ15N) as a function of
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Salinity and inundation effects on productivity of brackish tidal marsh plants in the San Francisco Bay-Delta Estuary Hydrobiologia (IF 2.385) Pub Date : 2020-10-29 Christopher N. Janousek, Bruce D. Dugger, Brandon M. Drucker, Karen M. Thorne
Plant productivity is central to numerous ecosystem functions in tidal wetlands. We examined how productivity of brackish marsh plants in northern California responded to abiotic stress gradients of inundation and salinity using two experimental approaches. In a greenhouse study with varying salinity, shoot production and biomass of Juncus balticus, Schoenoplectus acutus and S. americanus all declined
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Combining conservation priorities and vulnerability of invasion in nature reserves using geospatial tools can optimize management efforts Hydrobiologia (IF 2.385) Pub Date : 2020-10-28 M. E. Bravo, S. M. Fiori, M. E. Carbone
The management of invasive species in large, little-known, nature reserves is difficult. Weighing the risk of invasion against the conservation value of each sector in nature reserves would help design viable management strategies. We evaluated the invasion risk of the Pacific oyster (Crassostrea gigas) in nature reserves in the Bahía Blanca estuary (Argentina). We tested the hypothesis that there
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Semi-natural fishway efficiency for goliath catfish ( Brachyplatystoma spp.) in a large dam in the Amazon Basin Hydrobiologia (IF 2.385) Pub Date : 2020-10-28 Lisiane Hahn, Eduardo G. Martins, Leonardo D. Nunes, Leonardo S. Machado, Taise M. Lopes, Luís Fernando da Câmara
The recent large-scale hydropower development in the Amazon basin has raised concerns about the impacts on the movements of migratory fishes such as goliath catfish (Brachyplatystoma spp.). In the Madeira River, the efficiency of a 1400-m long fishway in the Santo Antônio hydropower plant (SAE HPP) was evaluated between 2012 and 2016 using telemetry techniques. Tagged fish (N = 388) were released 2000 m
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Demographic characteristics of young-of-year freshwater mussel populations in ponds Hydrobiologia (IF 2.385) Pub Date : 2020-10-27