International Review of Hydrobiology最新文献

{"title":"Does predation by the omnivorous Gammarus fossarum affect small-scale distribution of macroinvertebrates? A case study from a calcareous spring fen","authors":"Berenika Georgievová,&nbsp;Marie Zhai,&nbsp;Jindřiška Bojková,&nbsp;Vanda Šorfová,&nbsp;Vít Syrovátka,&nbsp;Vendula Polášková,&nbsp;Jana Schenková,&nbsp;Michal Horsák","doi":"10.1002/iroh.202002046","DOIUrl":"10.1002/iroh.202002046","url":null,"abstract":"<p>Our understanding of functional roles of aquatic invertebrate taxa is still limited even for common species, although being crucial for explanations of patterns observed in natural communities. As only recently shown, the common native European amphipod <i>Gammarus fossarum</i>, traditionally treated as a shredder of leaf litter, shows predatory behaviour which may influence the composition of invertebrate assemblages. However, the evidence for the predation effect of <i>G. fossarum</i> on natural assemblages at the within-site scale is still lacking. Therefore, we collected 50 quantitative samples of macroinvertebrates along with the important environmental variables within a heterogeneous calcareous spring fen. Using linear regression, we explored the relationships between the abundance of <i>G. fossarum</i> (separately adult and juvenile) and the abundance and number of taxa for two groups of invertebrates differing in their susceptibility to predation, (a) hard-bodied taxa with protective body structures, such as shells and calcified cuticles, and (b) soft-bodied taxa without those protections. We separated the effect of <i>G. fossarum</i> from that of environmental conditions using variation partitioning. Our results showed that only the abundance of soft-bodied invertebrates was negatively correlated with the abundance of adult <i>G. fossarum</i>. However, the proportion of variation explained purely by predation (5.5%) was much lower than the one explained by the environment (33.8%). Both <i>G. fossarum</i> and soft-bodied invertebrates were positively associated with organic matter. Although hard-bodied invertebrates consisted of only a few taxa, they were more numerous than soft-bodied invertebrates, and only environmental control was confirmed for them. Despite the limitations of the used correlative approach, we conclude that <i>G. fossarum</i> can significantly control the abundance of vulnerable taxa in natural assemblages. Its predatory effects, however, may be relatively low and easily confounded by the effect of environmental control.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 5-6","pages":"162-170"},"PeriodicalIF":1.9,"publicationDate":"2020-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.202002046","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46065942","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":"First report about toxic cyanobacterial bloom occurrence in Lake Sevan, Armenia","authors":"Gor Gevorgyan,&nbsp;Karsten Rinke,&nbsp;Martin Schultze,&nbsp;Armine Mamyan,&nbsp;Anton Kuzmin,&nbsp;Olga Belykh,&nbsp;Ekaterina Sorokovikova,&nbsp;Armine Hayrapetyan,&nbsp;Anahit Hovsepyan,&nbsp;Termine Khachikyan,&nbsp;Sargis Aghayan,&nbsp;Galina Fedorova,&nbsp;Andrey Krasnopeev,&nbsp;Sergey Potapov,&nbsp;Irina Tikhonova","doi":"10.1002/iroh.202002060","DOIUrl":"10.1002/iroh.202002060","url":null,"abstract":"<p>Lake Sevan, Armenia, is the largest freshwater body in the Caucasus region. Cyanobacteria have become increasingly dominant in summer in Lake Sevan, reflecting the eutrophication of the lake and formed a massive bloom event in 2018. These recent observations mark the transition of this previously oligotrophic high mountain lake into an eutrophic lake with scum-forming cyanobacterial blooms. A bloom of <i>Dolichospermum</i> in July caused a sudden increase in chlorophyll-<i>a</i> concentrations up to, on average, 20 µg/L and a strong decrease in water transparency. The cyanobacterial genera <i>Dolichospermum</i>, <i>Aphanizomenon</i>, <i>Anabaena</i>, <i>Cyanobium</i>, and <i>Synechococcus</i> were detected by metagenomic analysis of the lake bacterioplankton. A qualitative and quantitative assessment of peptide-based secondary metabolites revealed the first detection of cyanotoxins in Lake Sevan. Ten types of microcystin congeners were found in Lake Sevan. The total concentration of microcystins in the phytoplankton varied from 0.34 to 2.49 µg/L. This first record of cyanotoxins in the largest lake in the Caucasus region calls for an urgent need for sustainable nutrient management and a systematic assessment of the ultimate causes that lead to the reoccurrence of scum-forming Cyanobacteria in this large Alpine lake.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 5-6","pages":"131-142"},"PeriodicalIF":1.9,"publicationDate":"2020-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.202002060","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44770124","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":"Behavior of Gammarus aequicauda (Crustacea, Amphipoda) during predation on Artemia (Crustacea, Anostraca): New experimental results","authors":"Nickolai Shadrin,&nbsp;Vladimir Yakovenko,&nbsp;Elena Anufriieva","doi":"10.1002/iroh.202002059","DOIUrl":"10.1002/iroh.202002059","url":null,"abstract":"<p><i>Gammarus aequicauda</i> and <i>Artemia</i> spp. are abundant crustacean species in Crimean hypersaline lakes. <i>G. aequicauda</i> preys on <i>Artemia</i> but there was no quantitative data on this before the current study. Predation of <i>G. aequicauda</i> on adult <i>Artemia</i> was studied in experiments with two different approaches evaluating (a) the time balance of the feeding process and (b) the grazing intensity. The threshold prey concentration, when consumption began to increase with increasing concentration, was approximately 15 ind./L in 200-ml vessels and about 5 ind./L in 500-ml vessels. When the <i>Artemia</i> abundance reached 20–25 ind./L, there was no further influence on the gammarid consumption rate. There was a significant negative correlation between the consumption rate of gammarids and <i>Artemia</i> abundance. According to study results, an individual <i>G. aequicauda</i> may eat up to 20–24 <i>Artemia</i>/day. Our study suggests that (a) <i>G. aequicauda</i> is an omnivorous species and can significantly suppress populations of its prey. (b) The two experimental approaches used to study the feeding of gammarids on <i>Artemia</i> produced similar results, and both may be used to quantitatively assess relations in a “prey–predator” system. (c) The abundance of predators and prey, as well as the experimental vessel volume, may influence the feeding rate. (d) The presence of plant food resources such as the leaves of <i>Ruppia</i> does not influence on the predatory feeding rate of <i>G. aequicauda</i>. (e) The rate of prey consumption by <i>G. aequicauda</i> is not constant and depends nonlinearly on prey and predator abundance. (f) Cannibalism occurs in the presence of plant resources only, but not in the presence of <i>Artemia</i>. (g) Other gammarids react to the capture of <i>Artemia</i> by one of them. They swim up to the successful individual and try to take some part of the prey.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 5-6","pages":"143-150"},"PeriodicalIF":1.9,"publicationDate":"2020-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.202002059","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45177550","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":"Caffeine reduces the toxicity of albendazole and carbamazepine to the microalgae Raphidocelis subcapitata (Sphaeropleales, Chlorophyta)","authors":"Vinicius Diniz,&nbsp;Gabriela M. Reyes,&nbsp;Susanne Rath,&nbsp;Davi G. F. Cunha","doi":"10.1002/iroh.201902024","DOIUrl":"10.1002/iroh.201902024","url":null,"abstract":"<p>Pharmaceutically active compounds (PhACs) are emerging contaminants that have been widely detected in water bodies in the last decades, with ecological effects toward aquatic biota that have not been fully elucidated. Most studies concerning their toxicity to microalgae have only considered short-term individual PhAC exposure, rather than combined exposure to several compounds for longer time periods. In this study, we investigated the effects of albendazole (ABZ) (anthelmintic) and carbamazepine (antiepileptic), alone and in combination with caffeine, on the growth and production of chlorophyll-a of the microalgae <i>Raphidocelis subcapitata</i>, during 16 days of exposure. ABZ alone had a more significant effect than carbamazepine alone on the growth rate and maximum cell density of the microalgae (<i>p</i> &lt; .05; analysis of variance). These results were probably related to the effect of ABZ in inhibiting enzyme complexes and cell membrane proteins related to adenosine triphosphate synthesis, which is important for cell growth. The presence of caffeine lowered the toxicities of ABZ and carbamazepine to the microalgae, probably due to its antioxidant properties, positively affecting chlorophyll-a production, growth rate, and maximum cell density. Thus, caffeine had an antagonistic interaction with the studied PhACs. The results reinforce the importance of ecotoxicological assays that compare individual and combined PhAC exposure conditions. Our findings highlighted that caffeine can be a relevant factor influencing such assays, considering its widespread occurrence in impacted water bodies.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 5-6","pages":"151-161"},"PeriodicalIF":1.9,"publicationDate":"2020-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201902024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47082154","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.202073010","DOIUrl":"https://doi.org/10.1002/iroh.202073010","url":null,"abstract":"","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 3-4","pages":"59"},"PeriodicalIF":1.9,"publicationDate":"2020-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.202073010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91850060","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":"Captive breeding conditions decrease metabolic rates and alter morphological traits in the endangered Spanish toothcarp, Aphanius iberus","authors":"Dani Latorre,&nbsp;Emili García-Berthou,&nbsp;Francesc Rubio-Gracia,&nbsp;Cristina Galobart,&nbsp;David Almeida,&nbsp;Anna Vila-Gispert","doi":"10.1002/iroh.201902014","DOIUrl":"10.1002/iroh.201902014","url":null,"abstract":"<p>Physiological features of species can determine the resilience and adaptation of organisms to the environment. Swimming capacity and metabolic traits are key factors for fish survival, mating and predator–prey interactions. Individuals of the same species can display high phenotypic variation often in response to varying environmental conditions. We investigated the effects of captive breeding conditions on swimming capacity, metabolic traits and morphology by comparing a captive population with a wild population of the endangered Spanish toothcarp (<i>Aphanius iberus</i>). We measured swimming capabilities and oxygen-uptake rates simultaneously, the latter as a proxy for metabolic rate, using a swim tunnel respirometer. Results showed significant differences in standard metabolic rate (SMR), maximum metabolic rate (MMR) and absolute aerobic scope (AAS) between populations, as well as differences in morphological features between populations and sexes. In contrast, we did not find significant differences in critical swimming speed between populations or sexes. Differences in SMR between sexes were found in the captive population, and males showed nearly a twofold increase in SMR when compared with females. SMR, MMR and AAS were, on average, twofold lower for the captive population in comparison with the wild population. These differences in metabolic traits likely reflected captivity conditions, which were low food availability and the absence of predators, which in turn, may have influenced morphological traits, such as body and caudal peduncle shape and head size. At the same time, morphological traits also influenced metabolic traits of the populations. The lower SMR and MMR of captive individuals may be related to their deeper body shapes. Taken together, our results suggested that captive breeding conditions caused significant physiological and morphological changes in the endangered Spanish toothcarp. Reduced metabolic traits and changes in morphology may affect fitness-related traits of the captive populations once reintroduced into the wild, thereby compromising conservation efforts. We therefore recommend to experimentally testing for the effects and consequences of captive breeding conditions before fish are released into the wild for successful conservation of them and other endangered species.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 5-6","pages":"119-130"},"PeriodicalIF":1.9,"publicationDate":"2020-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201902014","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49304811","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":"Anthropogenic flow intermittency shapes food-web topology and community delineation in Mediterranean rivers","authors":"Ignacio Peralta-Maraver,&nbsp;Manuel Jesús López-Rodríguez,&nbsp;Anne L. Robertson,&nbsp;José Manuel Tierno de Figueroa","doi":"10.1002/iroh.201902010","DOIUrl":"10.1002/iroh.201902010","url":null,"abstract":"<p>Anthropogenic flow intermittency is considered a severe disturbance for benthic macroinvertebrates with largely unknown impacts on the organization of benthic communities and their food webs. We analysed the community composition (as taxonomic composition and relative abundance of taxa) and food webs of the macroinvertebrates inhabiting the pools and riffles of two Mediterranean streams with contrasting perennial and anthropogenic intermittent flow regimes. Our analyses comprised monthly measurements in two pools and two riffles of the community composition, food-web topology (the pattern in which specific links are arranged within the network) and food-web complexity indexes (the number of nodes and links regardless of their identity or arrangement) over 1 year. The food webs revealed a significant annual variation in size, complexity, and diversity within pools and under perennial flow (e.g., number of nodes, number of links, link density). Multivariate analysis showed strong differences in the composition and relative abundance of taxa and food-web topology of assemblages inhabiting pools and riffles. However, differences between communities inhabiting pools and riffles varied during the year; periods of great similarity were followed by periods in which communities were very different. This annual sequence of differences between pools and riffles was compressed under the anthropogenic flow intermittency regime. The anthropogenic intermittent flow studied here might represent a moderate stressor for Mediterranean communities well-adapted to dry conditions. Still, the reported deviation of the community composition and food-web topology from the reference status reflect the detrimental effect of this stressor on the benthic community.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 3-4","pages":"74-84"},"PeriodicalIF":1.9,"publicationDate":"2020-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201902010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45440233","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":"Melanin and antipredatory defenses in Daphnia dadayana under UVR exposure","authors":"Laura Wolinski,&nbsp;Beatriz Modenutti,&nbsp;Esteban Balseiro","doi":"10.1002/iroh.201902033","DOIUrl":"10.1002/iroh.201902033","url":null,"abstract":"<p>Ultraviolet radiation (UVR) exposure has potentially hazardous effects on aquatic life, even more in the southern hemisphere, which is close to ozone layer depletion. Aquatic animals living in shallow water cannot escape from UVR effects swimming down, so they have to generate other traits to confront it (i.e., enzymes or pigments). <i>Daphnia</i> is a worldwide freshwater genus that inhabits ponds and lakes. <i>Daphnia dadayana</i> inhabits shallow lakes in Patagonia presenting a yellowish carapace and a horn-like structure in juveniles assumed for avoiding invertebrate predator attacks. We aimed to determine the effect of UVR exposure on the accumulation of melanin and if the development of the antipredatory defense affects the antioxidant response (glutathione S-transferase [GST] activity) to UVR. We carried out laboratory experiments with treatments with and without UVR exposure measuring melanin accumulation by photographic analyses. Also, we performed an experiment to generate the antipredatory structure exposing <i>D. dadayana</i> indirectly to the predaceous copepod <i>Parabroteas sarsi</i>. Our results showed that UVR increased melanin accumulation in <i>D. dadayana</i> and that the morphological structure against predators did not decrease the antioxidant enzymatic defenses (GST). Our concluding remarks are that <i>D. dadayana</i> is a successful organism that can use its phenotypic plasticity to cope with environmental stressors such as invertebrate predators and UVR exposure with no trade-off between these two stressors.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 3-4","pages":"106-114"},"PeriodicalIF":1.9,"publicationDate":"2020-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201902033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41539222","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":"Research on aquatic ecosystems – freshwater and marine environments and their management","authors":"","doi":"10.1002/iroh.202071010","DOIUrl":"10.1002/iroh.202071010","url":null,"abstract":"","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 1-2","pages":"1"},"PeriodicalIF":1.9,"publicationDate":"2020-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.202071010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44777040","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":"Streamside mobile mesocosms (MOBICOS): A new modular research infrastructure for hydro-ecological process studies across catchment-scale gradients","authors":"Patrick Fink,&nbsp;Helge Norf,&nbsp;Christine Anlanger,&nbsp;Mario Brauns,&nbsp;Norbert Kamjunke,&nbsp;Ute Risse-Buhl,&nbsp;Mechthild Schmitt-Jansen,&nbsp;Markus Weitere,&nbsp;Dietrich Borchardt","doi":"10.1002/iroh.201902009","DOIUrl":"10.1002/iroh.201902009","url":null,"abstract":"<p>A key research aim for lotic ecosystems is the identification of natural and anthropogenic pressures that impact ecosystem status and functions. As a consequence of these perturbations, many lotic ecosystems are exposed to complex combinations of nonchemical and chemical stressors. These stressors comprise temperature fluctuations, flow alterations, elevated solute loads or xenobiotics, and all these factors can pose stress upon aquatic ecosystems on different temporal, spatial and biological scales. Factorial experiments are essential to reveal causal relationships especially between combined stressors and their effects in the environment. However, experimental tools that account for the complexity of running waters across different ecosystem compartments, levels of biological organisation, natural or anthropogenic environmental gradients, and replicability are rare. Here we present a new research infrastructure consisting of streamside mobile mesocosms (MOBICOS) that allows analysing the effects of stressors and stressor combinations through multifactorial experiments in near-natural settings and across anthropogenic pressure gradients. Consisting of eight container-based running water laboratories operated as bypasses to running surface waters, MOBICOS combines in situ real-time monitoring of physicochemical and biological parameters with manipulative experiments across ranges of environmental conditions. Different flume types can be set up within MOBICOS to separate and combine different ecosystem compartments (pelagic, epibenthic and hyporheic zones) in a flexible and modular way. Due to its compact design, the MOBICOS units can be shifted easily to particular sites of interest. Furthermore, simultaneous operation of multiple MOBICOS units at different sites allows the integration of natural gradients in multifactorial experiments. We highlight the versatility of the MOBICOS experimental infrastructure with two case studies addressing (a) hydraulic control of lotic biofilms and (b) pollution-induced community tolerance of biofilms along an environmental gradient. The modular and mobile MOBICOS units have the potential to significantly advance our understanding of causal relationships between natural environmental oscillations, anthropogenic stressors and their combined ecological impacts on lotic aquatic ecosystems beyond existing stream mesocosm approaches.</p>","PeriodicalId":54928,"journal":{"name":"International Review of Hydrobiology","volume":"105 3-4","pages":"63-73"},"PeriodicalIF":1.9,"publicationDate":"2020-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/iroh.201902009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48331642","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}