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The relative importance of spatial and environmental processes in the assembly of larval Chironomidae (Insecta, Diptera) communities along a transition landscape in southern Brazilian streams Limnology (IF 1.625) Pub Date : 2021-02-18 Melina Forgiarini Maxwell, Elisangela Secretti, Mateus Marques Pires, Carla Bender Kotzian
Metacommunity structure of stream invertebrates is contingent on complex interplays between species dispersal ability, spatial extent and watershed environmental specificities. Previous studies showed that high diversity of Chironomidae (Insecta, Diptera) is observed in southern Brazilian montane streams, although the knowledge of the processes driving such high diversity is poorly comprehended. In
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Dam promotes downriver functional homogenization of phytoplankton in a transitional river-reservoir system in Amazon Limnology (IF 1.625) Pub Date : 2021-02-16 Luana Silva de Castro, Adriani Aragão de Souza Lopes, Lucas Colares, Leandra Palheta, Mayko de Souza Menezes, Luciana Mendes Fernandes, Bárbara Dunck
Dams disrupt the longitudinal gradient and decrease the natural connectivity of lotic systems and change the physical, chemical, and biological compartments of the river environment. Here, we investigated the effects of damming and seasonal variation in environmental conditions and richness, density, taxonomic and functional beta diversity patterns of phytoplankton, through dry and rainy seasons (of
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Phylogenetic diversity of the picocyanobacterial community from a novel winter bloom in Lake Biwa Limnology (IF 1.625) Pub Date : 2021-02-04 Ji Cai, Yoshikuni Hodoki, Shin-ichi Nakano
In Lake Biwa, picocyanobacteria blooms usually occur during the summer–autumn thermal stratification period. Intriguingly, a novel bloom was detected in winter 2015–2016, in which picocyanobacterial cell density increased by one order of magnitude despite lower water temperature, suggesting the possibility that “cold-water-preference” species dominate in the picocyanobacterial community. In the present
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Influence of climate seasonality on the effectiveness of the use of aquatic macroinvertebrates in urban impact evaluation in central Amazonia Limnology (IF 1.625) Pub Date : 2021-01-02 Sheyla R. M. Couceiro, Karina Dias-Silva, Neusa Hamada
Natural fluctuations in ecosystems, such as those associated with climate, are a fundamental factor structuring macroinvertebrate assemblages. Given that macroinvertebrates are widely used in biomonitoring of aquatic systems, it is necessary assess the potential effects of seasonality on this group to avoid confusing its effects with the effects of anthropogenic impacts. In the present study, the richness
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Interspecific variation in ephippial size between Daphnia galeata and D. pulicaria in Lake Biwa, Japan Limnology (IF 1.625) Pub Date : 2020-11-25 Narumi K. Tsugeki, Mie N. Honjo, Michinobu Kuwae
Daphnia, keystone herbivores in lakes, routinely produce immediately hatching eggs; additionally, they also produce resting eggs enveloped by an ephippial case, a thickened carapace that allows population survival under harsh environmental conditions. To examine differences in ephippial morphology between Daphnia species in different subgenera, we conducted microscopic observations and genetic analyses
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Influences of green macroalgae blooms on nutrients and sulfide dynamics in hypereutrophic intertidal ecosystems Limnology (IF 1.625) Pub Date : 2020-11-23 Yukiko Senga, Wataru Kobayashi, Kasumi Mikawa, Toshiyuki Kitazawa, Seongwon Lee, Yohei Shiraki
Blooms of green macroalgae (Ulva spp.) occur frequently in the hypereutrophic Yatsu tidal flat of eastern Japan. In this study, to elucidate the effects of such blooms on nutrients and sulfide dynamics, we measured Ulva nutrients uptakes and stocks, and sulfide release during Ulva blooms decay. NH4+ uptake was greater than NO3– uptake when NH4+ was sufficient, whereas NO3– uptake increased in the absence
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Determining an effective sampling method for eDNA metabarcoding: a case study for fish biodiversity monitoring in a small, natural river Limnology (IF 1.625) Pub Date : 2020-11-15 Masayuki K. Sakata, Takeshi Watanabe, Nobutaka Maki, Kousuke Ikeda, Toshihiro Kosuge, Hiroaki Okada, Hiroki Yamanaka, Tetsuya Sado, Masaki Miya, Toshifumi Minamoto
In recent years, biodiversity loss has become one of the most serious environmental issues worldwide, especially in aquatic ecosystems. To avoid diversity loss, it is necessary to monitor biological communities, and environmental DNA (eDNA) metabarcoding has been developed as a rapid, noninvasive, and cost-effective method for aquatic biodiversity monitoring. Although this method has been applied to
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Freshwater testate amoebae from waterbodies of North Vietnam with the finding of indicator species Limnology (IF 1.625) Pub Date : 2020-11-13 Hoan Q. Tran, Van T. H. Tran, Denis V. Tikhonenkov
Testate amoebae are an irreplaceable key component of microbial communities in many aquatic and soil ecosystems and well known as useful bioindicators. In the present work, testate amoebae compositions in different-type biotopes of freshwater waterbodies of North Vietnam were investigated for the first time. A total of 80 species and subspecies belonging to 12 genera and 8 families were identified
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Differential intraspecific genetic variations of the closely related, wide-ranged freshwater copepods Cyclops vicinus Uljanin, 1875 and C. kikuchii Smirnov, 1932 Limnology (IF 1.625) Pub Date : 2020-11-12 Imane Sioud, Wataru Makino, Jotaro Urabe
Although Cyclops vicinus Uljanin, 1875 and C. kikuchii Smirnov, 1932 are broadly distributed in Eurasia, the genetic divergences between European and Asian populations have been investigated in neither species. In Japan, the nomenclature and distinction between these two congeners are still questionable (thus, hereafter C. vicinus s.l.). We determined the taxonomic position of the Japanese C. vicinus
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Aquatic macrophytes are important substrates for Libellulidae (Odonata) larvae and adults Limnology (IF 1.625) Pub Date : 2020-11-04 Joás Silva Brito, Thaisa Sala Michelan, Leandro Juen
Understanding the role of abiotic and biotic factors on biological communities is a challenge for ecologists. Individuals of the order Odonata have a close connection with these factors, which can influence the establishment of each stages of live. This study evaluated the relationship between habitat complexity and limnological variables on the diversity of Libellulidae larvae and adults. Our hypotheses
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The invasive macrophyte Hydrilla verticillata causes taxonomic and functional homogenization of associated Chironomidae community Limnology (IF 1.625) Pub Date : 2020-10-09 Camila Gentilin-Avanci, Gisele D. Pinha, Danielle K. Petsch, Roger P. Mormul, Sidinei M. Thomaz
Exotic species have invaded freshwater ecosystems, causing biodiversity loss of associated communities. We investigated the influence of the invasive macrophyte Hydrilla verticillata on taxonomic and functional richness, and on taxonomic and functional beta diversity of associated Chironomidae community, comparing this macrophyte with the structurally similar native macrophyte, Egeria najas. We conducted
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Palaeoenvironment shifts during last ~ 500 years and eutrophic evolution of the Wular Lake, Kashmir Valley, India Limnology (IF 1.625) Pub Date : 2020-09-05 Rayees Ahmad Shah, Hema Achyuthan, Aasif Lone, Pankaj Kumar, Asif Ali, Abdur Rahman
Multi-proxy analysis of lake sediments provides high-resolution and reliable palaeoclimate records. The present study aims to investigate the palaeoenvironmental changes and eutrophic evolution of the Wular Lake, Kashmir Valley spanning the last ~ 500 years. Based on the multi-proxy analysis and supported by radiocarbon chronology, two prominent environmental phases were identified. From 74 to 45 cm
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Niche measures and growth rate do not predict interspecific variation in spatial synchrony of phytoplankton Limnology (IF 1.625) Pub Date : 2020-09-04 Matheus Nunes da Silva, Rafaela Vendrametto Granzotti, Priscilla de Carvalho, Luzia Cleide Rodrigues, Luis Mauricio Bini
Spatial synchrony occurs when local populations exhibit correlated dynamics over time. Recent studies, both experimental and observational, have indicated that the magnitude of spatial synchrony, in cross-species analyses, is correlated with the level of specialization. In theory, specialist species would exhibit higher levels of synchrony than generalist species because they would be more sensitive
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To what degree do spatial and limnological predictors explain the occurrence of a submerged macrophyte species in lotic and semi-lotic/lentic environments of a dammed river? Limnology (IF 1.625) Pub Date : 2020-08-25 Edson Gomes de Moura-Júnior, William Severi, Luciana Hiromi Yoshino Kamino, José Pires de Lemos-Filho
Insufficient knowledge about ecology of weed macrophytes from a large-scale perspective narrows the necessary decision-making for biodiversity conservation. The present study aimed to assess the occurrence frequency of Egeria densa in lotic and lentic/semi-lotic environments from a Brazilian dammed river, as well as to quantify the attributed explanation (pure or combined) by limnological and spatial
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Application of environmental DNA methods for the detection and abundance estimation of invasive aquatic plant Egeria densa in lotic habitats Limnology (IF 1.625) Pub Date : 2020-08-20 Seiji Miyazono, Takao Kodama, Yoshihisa Akamatsu, Ryohei Nakao, Minoru Saito
Estimating the presence and abundance of non-native species in the early stage of invasion is important to prevent further spread of non-native species in aquatic systems. Environmental DNA (eDNA) methods have been applied for aquatic plants; however, it is still questionable on the accuracy of the eDNA methods for the detection and abundance estimation of aquatic plants in lotic systems. Here, we
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Changes in the vertical distribution of hyporheic and benthic fauna associated with low flow conditions in the headwaters of the Tafna river (northwest Algeria) Limnology (IF 1.625) Pub Date : 2020-08-16 Zeyneb Benkebil, Amina Taleb, Ibrahim Zenagui, Nouria Belaidi
This study investigated temporal changes in the vertical distribution of invertebrates during periods of low flows in the Tafna wadi, a semi-arid Mediterranean river characterised by a general decline in average flows. The hyporheos was sampled along a 130-m stretch at depths of 0.3, 0.6 and 1 m in a pool-riffle sequence and a lateral gravel bar. Benthic fauna was collected on each sampling occasion
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Temporal β -diversity of zooplankton at various time scales in a small mountain lake Limnology (IF 1.625) Pub Date : 2020-08-06 Ishara Uhanie Perera, Natsumi Maruoka, Wataru Makino, Jotaro Urabe
To examine how compositional changes in a community vary depending on time scales, we estimated temporal β-diversity of zooplankton in Lake Hataya Ohnuma, a small lake in Yamagata, Japan. The zooplankton community was monitored for 9 years with monthly samplings. We estimated the inter-annual, inter-seasonal, intra-seasonal, and inter-month β-diversity with the magnitude of sampling errors, and examined
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Field storage of water samples affects measured environmental DNA concentration and detection Limnology (IF 1.625) Pub Date : 2020-07-21 Amanda N. Curtis, Eric R. Larson, Mark A. Davis
Environmental DNA (eDNA) is an emerging approach for detecting species, yet numerous methodological questions remain unanswered. Here we examined how time to filtration (0–48 h after collection) and sample storage (open vs. chilled in the dark) influenced detection and measured eDNA concentration. Water samples kept in the dark and chilled had no significant decrease in detection or eDNA concentration
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Optical water types found in Brazilian waters Limnology (IF 1.625) Pub Date : 2020-07-09 Edson Filisbino Freire da Silva, Evlyn Márcia Leão de Moraes Novo, Felipe de Lucia Lobo, Claudio Clemente Faria Barbosa, Mauricio Almeida Noernberg, Luiz Henrique da Silva Rotta, Carolline Tressmann Cairo, Daniel Andrade Maciel, Rogério Flores Júnior
Optical water types (OWTs) can represent diverse ranges of Chlorophyll-a (Chl-a), total suspended matter (TSM), and colored dissolved organic matter (CDOM) concentrations, which make them extremely useful for monitoring water quality, for example, detecting eutrophic conditions or tuning remote sensing algorithms. In this study, the objective is to assess OWTs found in Brazilian waters using in situ
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First report of geosmin and 2-methylisoborneol (2-MIB) in Dolichospermum and Oscillatoria from Vietnam Limnology (IF 1.625) Pub Date : 2020-06-27 Thanh-Luu Pham, Manh Ha Bui, Mark Driscoll, Kazuya Shimizu, Utsumi Motoo
Cyanobacteria are the major producers of the taste and odour compounds geosmin and 2-methylisoborneol (2-MIB) in drinking water and fish worldwide. In recent years, the outbreaks of cyanobacteria blooms in Tri An and Dau Tieng Reservoirs, Vietnam have led to an increase attention in taste and odour problems. In the present study, the two off-flavour compounds geosmin and 2-MIB were found in field samples
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The impact of land use and climate change on surface runoff and groundwater in Cimanuk watershed, Indonesia Limnology (IF 1.625) Pub Date : 2020-06-26 Iwan Ridwansyah; Meti Yulianti; Apip; Shin-ichi Onodera; Yuta Shimizu; Hendro Wibowo; M. Fakhrudin
The Cimanuk River with a total watershed area of 4010.8 km2 flowing from the Garut Regency to Indramayu Delta is the longest in West Java Province. However, the cumulative effects of climate change, increased population, and fish farming in the coastal area have continuously pressured the availability of water resources in its watershed. This study was, therefore, aimed to analyze the impact of land
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Sediment phosphorus cycling in a nutrient-rich embayment in relation to sediment phosphorus pool and release Limnology (IF 1.625) Pub Date : 2020-06-13 Guangzhe Jin; Shin-ichi Onodera; Mitsuyo Saito; Yuta Shimizu
A semi-enclosed river-mouth bay (Kojima Bay) and the artificial lake within it (Kojima Lake) were studied to examine their nutrient storage and export processes and characteristics. The aim of this study was to perform mass balance analysis using long-term monitoring and historical accumulation data of phosphorus (P) via 210Pb measurements of accumulated sediment. The results are then compared with
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Effects of Phylloicus case removal on consumption of leaf litter from two Neotropical biomes (Amazon rainforest and Cerrado savanna) Limnology (IF 1.625) Pub Date : 2020-06-06 Renan S. Rezende, João P. Bernardi, Eliane S. Gomes, Renato T. Martins, Neusa Hamada, José F. Gonçalves
Phylloicus (Trichoptera, Calamoceratidae) is a stream invertebrate widely distributed across Neotropical biomes, which larvae use allochthonous leaf litter as food resource and to build a case that offers protection against predation. Seasonal changes in leaf litter accumulation on the streambed may affect Phylloicus larvae due to variations in availability of food and case-building material; however
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Breakdown of green and senescent leaves in Amazonian streams: a case study Limnology (IF 1.625) Pub Date : 2020-06-02 Marcelo Alves, Renato Tavares Martins, Sheyla Regina Marques Couceiro
Allochthonous organic matter in low-order streams is, in general, mainly composed of senescent leaves. However, in tropical streams green leaves can represent an important source of energy. The present study evaluated the decomposition of green and senescent leaves in Amazonian streams using leaves of three plant species: Inga stipularis D.C. 1876, Tococa guianensis Aubl. 1775 and Vochysia ferruginea
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The life cycle of the Maghrebian endemic Ecdyonurus rothschildi Navás, 1929 (Ephemeroptera: Heptageniidae) and its potential importance for environmental monitoring Limnology (IF 1.625) Pub Date : 2020-05-30 Zineb Bouhala, Joaquín Márquez-Rodríguez, Khemissa Chakri, Farrah Samraoui, Hamed A. El-Serehy, Manuel Ferreras-Romero, Boudjéma Samraoui
North African streams and rivers face multiple anthropogenic stressors, and their aquatic fauna is rapidly dwindling before comprehensive knowledge of their distribution and ecology has been attained. We investigated the distribution and life cycle of the Maghrebian endemic Ecdyonurus rothschildi Navás, 1929 in northeastern Algeria. The species was recorded both from permanent and intermittent freshwater
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Functional diversity of chironomid communities in subarctic lakes across gradients in temperature and catchment characteristics Limnology (IF 1.625) Pub Date : 2020-05-27 Simon Belle, Willem Goedkoop
Northern ecosystems are experiencing rapid and large-scale changes driven by accelerated warming, which have profound effects on the terrestrial and freshwater biodiversity. A comprehensive understanding of the distribution of aquatic biodiversity of subarctic ecosystems is therefore needed to better predict future trajectories of their unique biodiversity. In this study, we examined the functional
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Developing a hydro-chemical model of Ise Bay watersheds and the evaluation of climate change impacts on discharge and nitrate-nitrogen loads Limnology (IF 1.625) Pub Date : 2020-05-01 Takeo Onishi; Jun Yoshino; Ken Hiramatsu; Hiroaki Somura
The objective of this study was to develop a hydro-chemical model using the Soil and Water Assessment Tool (SWAT) and to evaluate the climate change impacts on discharge and nitrate-nitrogen loads from Ise Bay watersheds (the Kiso, Nagara, Ibi, and Shonai rivers). Using a regional climate model, through the dynamic downscaling approach, present and future climate data were generated at a 2 km spatial
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Carbon gas flux to and from inland waters: support for a global observation network Limnology (IF 1.625) Pub Date : 2020-04-25 Thomas C. Harmon
Research on carbon gas flux to and from inland waters has increased over the past two decades, driven mainly by the need to understand (1) the global carbon budget in regard to stabilizing earth’s climate, and (2) how aquatic ecosystems and the services they provide change in response to anthropogenic pressures like climate and land use change. This paper reviews carbon flux research in support of
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Effect of in-stream impoundment on water quality of a suburban stream Limnology (IF 1.625) Pub Date : 2020-04-24 Yuta Shimizu; Shin-ichi Onodera; Guangzhe Jin; Mitsuyo Saito
This study aims to confirm the effect of a small stream impoundment on phosphorus and nitrogen dynamics in a suburban watershed. The results show that the phosphate concentration in the water body was significantly higher than that in the inflowing water under ordinary flow conditions. The phosphorus promotes algal growth that causes significant diurnal dissolved oxygen variation because of photosynthesis
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Effects of winter flooding on phosphorus dynamics in rice fields Limnology (IF 1.625) Pub Date : 2020-04-24 Takuya Ishida; Yoshitoshi Uehara; Tohru Ikeya; Takashi F. Haraguchi; Satoshi Asano; Yohei Ogino; Noboru Okuda
Controlling phosphorous (P) loads from rice fields is important for the conservation of aquatic ecosystems, in part because P is relatively concentrated at its sources. Recently, winter flooding, by which irrigation water is maintained in rice fields during winter, has attracted much attention as a farming strategy for environmental conservation and biodiversity maintenance. However, the effects of
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Elemental concentration in a potentially protected forest catchment in Singapore Limnology (IF 1.625) Pub Date : 2020-04-24 Canh Tien Trinh Nguyen; Dong Eon Kim; Jiandong Liu; Yixiong Cai; Shie-Yui Liong
A total of 24 soil samples, including 4 subsurface, 34 water samples and 17 sets of hydrological survey data were collected in a soil investigation and hydrological survey campaign from August 2017 to September 2018 at a small Dermawan forest catchment, Singapore. The study was to understand and evaluate the catchment’s soil and stream status through the assessment of elemental concentrations and their
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Correction to: Detection of freshwater mussels ( Sinanodonta spp.) in artificial ponds through environmental DNA: a comparison with traditional hand collection methods Limnology (IF 1.625) Pub Date : 2020-03-13 Daisuke Togaki, Hideyuki Doi, Izumi Katano
In the original publication of the article the sentence under the heading “Primer and probe design” was published incorrectly. The correct sentence is given in this correction.
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Identifying a “pseudogene” for the mitochondrial DNA COI region of the corixid aquatic insect, Hesperocorixa distanti (Heteroptera, Corixidae) Limnology (IF 1.625) Pub Date : 2020-04-09 Koki Yano; Masaki Takenaka; Toshimasa Mitamura; Koji Tojo
DNA barcoding has been actively used as a method for species identification, and it will become an increasingly important method in the future. However, DNA barcoding can occasionally encounter a major problem, namely “nuclear mitochondrial DNA pseudogenes (NUMTs)”. In this paper, we report the discovery of a pseudogene in the mitochondrial COI region from aquatic heteropterans. PCR with Folmer’s universal
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Appearance of hermaphrodite individuals in the crucian population ( Carassius auratus , Cyprinidae) during the regression phase of the water level in Chany Lake (Western Siberia) Limnology (IF 1.625) Pub Date : 2020-04-06 Elena N. Yadrenkina
Hermaphroditic individuals in the population of Chinese crucians [Carassius auratus (Linnaeus, 1758)] in Chany Lake (Western Siberia) were recorded during a water level regression phase between 2006 and 2014. This period was characterized by critical conditions affecting crucian spawning because of increasing water salinity and a wide amplitude of water temperature fluctuations in the shallow spawning
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High water flow velocity reduces beta diversity and leads to a distinct composition of Oligochaeta in Neotropical lotic ecosystems Limnology (IF 1.625) Pub Date : 2020-03-28 Danielle Katharine Petsch; Ana Paula dos Santos Bertoncin; Camila Gentilin-Avanci; Alline Favro; Juan David González‑Trujillo; Gisele Daiane Pinha
Water flow velocity is a strong environmental filter structuring benthic communities in lotic ecosystems. While many studies have determined its effect on the distribution and diversity patterns of insects, the role of water flow velocity on other groups of aquatic invertebrates (i.e., Oligochaeta) has remained unexplored. We sampled five lotic ecosystems to investigate the influence of water flow
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Long-term effects of fish biomanipulation and macrophyte management on zooplankton functional diversity and production in a temperate shallow lake Limnology (IF 1.625) Pub Date : 2020-03-28 Rayanne Barros Setubal; Nicoletta Riccardi
Eutrophication still is one of the greatest anthropogenic impacts affecting aquatic ecosystems. Food web manipulations to reverse eutrophic conditions have been applied, mainly by reducing fish stocks. However, the long-term results of biomanipulation are still ambiguous. The objective of this study was to evaluate biomanipulation effects on zooplankton functional diversity and production during 24 years
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Identifying microbial drivers promoting plant growth on soil amended with composted aquatic plant: insight into nutrient transfer from aquatic to terrestrial systems Limnology (IF 1.625) Pub Date : 2020-03-28 Shunsuke Matsuoka; Yuki Kobayashi; Satoru Hobara; Takashi Osono
Effects of applying composted aquatic plants on soil chemistry, soil microbes (fungi and bacteria), and the growth of cultivated plant were demonstrated. To identify drivers promoting cultivated plant growth on soil amended with composted aquatic plant, empirical data of pot experiments were incorporated into structural equation models by hypothesizing causal relationships between the application of
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Abiotic factors and trophic interactions affect the macroinvertebrate community of bromeliad tanks in a Neotropical Restinga Limnology (IF 1.625) Pub Date : 2020-03-25 Renan de Souza Rezende; Nádia Kroth; Bruna Maria Capitanio; Cássia Alves Lima-Rezende; Angélica Soligo Cassol; Gilberto Dinis Cozzer; Ronei Baldissera; Jennifer Ann Breaux; Daniel Albeny-Simões
Aquatic macroinvertebrate communities are dependent on intrinsic environmental characteristics and biological interactions in microhabitat systems. We investigated the species–area relationships, detritus content input and trophic interactions of macroinvertebrate fauna in 46 Vrieseae friburguensis in a “Restinga” environment. Our hypotheses are that (i) bromeliad water volume and detritus content
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Lagrangian tracking measurements revealed the temporal dynamics of nitrogen and phosphorus spiralling in a large Japanese river Limnology (IF 1.625) Pub Date : 2020-03-25 Tomoya Iwata; Yuta Ikeda; Ryo Uzawa; Yoshiki Ikarashi
The in-stream processing of nutrients plays an important role in the fluvial nutrient transport from lands to the ocean, but few empirical studies have addressed the temporal dynamics of net nutrient removal rates in large river systems. The present study applied the recently developed Lagrangian approach to the sixth-order Fuji River to identify the seasonal dynamics of in-stream uptake rates for
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Factors characterizing phosphate oxygen isotope ratios in river water: an inter-watershed comparison approach Limnology (IF 1.625) Pub Date : 2020-03-25 Jun’ichiro Ide; Takuya Ishida; Abigail P. Cid-Andres; Ken’ichi Osaka; Tomoya Iwata; Takuya Hayashi; Masanori Akashi; Ichiro Tayasu; Adina Paytan; Noboru Okuda
We compared the oxygen isotope ratio of dissolved phosphate \(\left( {\delta^{{{18}}} {\text{O}}_{{{\text{PO}}_{{4}} }} } \right)\) in two rivers with different land-cover and geological features (Ado River and Yasu River) within Lake Biwa basin, central Japan, to explore what factor primarily characterizes the \(\delta^{{{18}}} {\text{O}}_{{{\text{PO}}_{{4}} }}\). Mean values of \(\delta^{{{18}}}
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Partitioning the influence of hydrodynamics-induced physical variables and nutrients on phytoplankton assemblages in a shallow tropical reservoir (Koka, Ethiopia) Limnology (IF 1.625) Pub Date : 2020-03-11 Mesfin Gebrehiwot; Demeke Kifle; Ludwig Triest
Ecological processes, population dynamics and species interactions in shallow lakes and reservoirs are affected by seasonal and inter-annual fluctuations in rainfall and runoff. The present study aimed to explore the relationship between riverine runoff and phytoplankton community structure in Koka Reservoir, Ethiopia. Onsite measurements and collection of water samples and phytoplankton were performed
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Leaf consumption by invertebrate aquatic shredders in the Amazon: effects of climate change and microbial conditioning Limnology (IF 1.625) Pub Date : 2020-03-02 Renato Tavares Martins; José Francisco Gonçalves; Claudimir Menezes Campos; Aline Lopes; Maria Teresa Fernandez Piedade; Neusa Hamada
We grew leaves of Montrichardia arborescens in four microcosm chambers with different temperatures and CO2 concentrations simulating the scenarios of expected climate change. These leaves were used to feed shredders (Phylloicus) and to assess the effects of changes in leaf quality on their consumption. We also evaluated the effect of detritus conditioning by microorganisms on leaf consumption. We hypothesized
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Survival and attachment of biofouling freshwater mussel ( Limnoperna fortunei ) to environmental conditions: potential implications in its invasion, infection and biofouling control Limnology (IF 1.625) Pub Date : 2020-02-25 Wei Liu; Mengzhen Xu; Jiahao Zhang; Tongyu Zhang
The golden mussel (Limnoperna fortunei) has caused worldwide problems for the eco-environment and man-made structures. There have been many control strategies proposed, which have various strengths and weaknesses. To help selection of the effective control strategies that consider the biological traits of L. fortunei and the actual situation of biofouling, we studied the ecological amplitudes that
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Adapting the dynamic LakeMab model to simulate seasonal variations of phosphorus concentration in reservoirs: a case study of Lake Bultière (France) Limnology (IF 1.625) Pub Date : 2020-01-14 Vincent Roubeix; Camille Minaudo; Jordi Prats; Nathalie Reynaud; Qian Zhang; Florentina Moatar; Pierre-Alain Danis
Controlling phosphorus is fundamental to limit the risk of eutrophication of continental aquatic ecosystems. Integrated modelling of its concentration in the aquatic continuum requires specific tools for water bodies. However, although simple static empirical models and complex biogeochemical models are numerous, there are few relatively simple and flexible models able to simulate seasonal variations
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Community characteristics of phytoplankton and management implications in Poyang Lake Basin Limnology (IF 1.625) Pub Date : 2020-01-07 Xiongjun Liu; Quanfeng Lu; Yu Zhou; Ke Li; Yang Xu; Qian Lv; Jiajun Qin; Shan Ouyang; Xiaoping Wu
Eutrophication of lakes is one of the most common pressures affecting aquatic biodiversity and ecosystem services. Poyang Lake is of great importance for maintaining regional ecological balance; however, algal blooms have become major environmental problems in this basin, and they are also caused by a variety of problems including biodiversity decline, toxin production and possibly unsafe drinking
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The effects of river-level oscillations on the macroinvertebrate community in a river–floodplain system Limnology (IF 1.625) Pub Date : 2020-01-02 Dieison André Moi; Jéssica Ernandes-Silva; Matheus Tenório Baumgartner; Roger Paulo Mormul
Extreme climatic events, such as flooding and drought, can abruptly modify the amplitude of the river level of a river, promoting new environmental conditions and impacting aquatic communities. Furthermore, an increasing frequency of extreme droughts in dammed rivers is expected because dams homogenize the flood pulse and decrease the river level. In this study, we evaluated the effects of extreme
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Mechanism of silicate elution by hydrogen sulfide from bottom sediment in a brackish lake Limnology (IF 1.625) Pub Date : 2019-12-07 Ja Yeong Park; Shogo Sugahara; Michiko Egawa; Yasushi Seike
Highly concentrated dissolved silicate was detected in pore water from anoxic-reducing sediment in Lake Nakaumi, a brackish lake. Silicate concentration also simultaneously increased with total hydrogen sulfide concentration during the summer. Generally, dissolved silicate is readily adsorbed onto ferric hydroxide and precipitates in an oxidative environment. In this study, we focused on the behavior
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Analysis of mtDNA variability in closely related Baikal sponge species for new barcoding marker development Limnology (IF 1.625) Pub Date : 2019-12-02 A. S. Yakhnenko; V. B. Itskovich
Morphology-based identification and classification of sponge species is complicated, because their morphological features are highly variable. Therefore, molecular markers are ideal tools for delimiting sponge species. In this study, we compared the variability of two sections of COI (the standard 5′-end fragment and the I3-M11 fragment) for closely related Baikal sponge species. Although the mean
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Increased acetylcholinesterase inhibitor sensitivity as an intergenerational response to short-term acetylcholinesterase inhibitor exposure in Scapholeberis kingi Limnology (IF 1.625) Pub Date : 2019-11-26 Makoto Ishimota; Naruto Tomiyama
To determine the potential long-term risks associated with continual use of pesticides, we investigated (1) whether short-term exposure (48 h) of first generation (1G) Scapholeberis kingi to two acetylcholinesterase-inhibitor insecticides, pyraclofos and pirimicarb, would alter acetylcholinesterase-inhibitor sensitivity (based on immobility) in the second generation (2G), (2) whether acetylcholinesterase
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Stratification and mixing processes associated with hypoxia in a shallow lake (Lake Kasumigaura, Japan) Limnology (IF 1.625) Pub Date : 2019-11-23 Eiji Masunaga; Shunsuke Komuro
Physical processes associated with hypoxia events in a shallow lake, Lake Kasumigaura, Japan, are investigated with long-term mooring observations at the middle of the lake basin. Results show that strong stratification during the summer suppresses vertical mixing resulting in hypoxia in the bottom boundary layer. The dissolved oxygen decreases due to the limited oxygen supply under strongly stratified
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Genetic relationships of cichlid fishes from Lake Malawi based on mitochondrial DNA sequences Limnology (IF 1.625) Pub Date : 2019-11-08 Shaharior Hashem; Koichiro Kawai; Patrick Senam Kofi Fatsi; Atsuya Kodama; Hidetoshi Saito
The purpose of this study was to estimate the genetic distance, diversity and relationship of two large groups of Malawian cichlid, ‘mbuna’ living in rocky area and feeding on algae, and ‘non-mbuna’ in sandy area feeding on various items. A total of 78 species from 42 genera was determined for the DNA sequence of the mitochondrial control region. In a genetic tree, constructed with Kimura-2 parameter
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Does atypical 15 N and 13 C enrichment in parasites result from isotope ratio variation of host tissues they are infected? Limnology (IF 1.625) Pub Date : 2019-11-03 Eri Kamiya; Misako Urabe; Noboru Okuda
Contrary to a general rule of stable isotope trophic discrimination, parasites show great variation in isotope discrimination from their host muscle tissues. One of the possible mechanisms is that isotopic variation among host tissues may cause apparent deviation from the actual isotope discrimination between a parasite and a given host tissue consumed by the parasite. To test this possibility, we
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Long-term variation in abundance of the non-native phytoplankton Micrasterias hardyi (Zygnematophyceae, Streptophyta) in Lake Biwa, Japan Limnology (IF 1.625) Pub Date : 2019-10-15 Yoshikuni Hodoki; Tadatoshi Koitabashi; Yukiko Goda; Tetsuji Akatsuka; Shin-ichi Nakano
Alien species have invaded worldwide and altered native biodiversity and ecosystem functions. In Lake Biwa, Japan, Micrasterias hardyi—considered an endemic species in Australia—has become one of the major dominant species since 2016. To evaluate long-term and seasonal variations in M. hardyi, we analyzed 20 years of plankton samples from the northern basin of Lake Biwa. The presence of this species
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Bacterial 16S rDNA and alkaline phosphatase gene diversity in soil applied with composted aquatic plants Limnology (IF 1.625) Pub Date : 2019-10-04 Shunsuke Matsuoka; Shohei Fujinaga; Yuki Kobayashi; Satoru Hobara; Takashi Osono
The present study aimed to examine the effects of applying composted aquatic plants (CAP) on richness and composition of soil bacterial assemblages responsible for alkaline phosphatase production by pot experiments, as compared to the corresponding effects of inorganic chemical fertilizers (ICF). Soil bacterial assemblages were studied by metabarcoding the 16S region of ribosomal DNA as a universal
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Estimation of spatiotemporal variations in nutrient fluxes from sediments in the seasonally hypoxic Omura Bay, Japan Limnology (IF 1.625) Pub Date : 2019-09-24 Naoki Muta; Yu Umezawa; Akira Yamaguchi; Hirokazu Suzaki; Minoru Wada; Hideaki Nakata; Kazuaki Kawamoto; Kazumi Matsuoka
In the seasonally hypoxic semi-enclosed Omura Bay, Japan, regression equations estimating year-round nutrient [NO3 + NO2, NH4, PO4, Si(OH)4] concentrations in pore water were successfully constructed based on water temperature and the concentration of biogenic elements in surface sediments, except for NH4 and PO4 concentrations in summer when the hypoxic water mass develops. Core incubation studies
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Diversity of culturable actinobacteria associated with deepwater endemic amphipods of Lake Baikal and study of their biosynthetic capabilities Limnology (IF 1.625) Pub Date : 2019-09-14 E. S. Protasov; D. V. Axenov-Gribanov; Ya. A. Rzhechitsky; V. A. Emshanova; Y. A. Shirokova; M. A. Timofeyev
Lake Baikal’s ecosystem is among the oldest lacustrine ecosystems on the planet with a diverse and unique flora and fauna. Amphipods (Amphipoda, Crustacea) are one of the most diverse groups among the lake’s invertebrate animals. The lake contains more than 350 species and subspecies of amphipods, and each of these species play a significant role in the lake’s food webs. However, their relationships
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Contrasting intra-annual inorganic carbon dynamics and air–water CO 2 exchange in Dhamra and Mahanadi Estuaries of northern Bay of Bengal, India Limnology (IF 1.625) Pub Date : 2019-09-09 Suchismita Pattanaik; Abhra Chanda; Rajesh Kumar Sahoo; Sanhita Swain; Deepty Ranjan Satapathy; Chitta Ranjan Panda; Saroj Bandhu Choudhury; Pradipta Kumar Mohapatra
Surface water partial pressure of carbon dioxide [pCO2 (water)], total alkalinity (TA), dissolved inorganic carbon (DIC), and air–water CO2 flux were measured in two estuaries of the Bay of Bengal namely Mahanadi and Dhamra. Though the annual average air–water CO2 fluxes at the Mahanadi and the Dhamra Estuaries were − 3.9 ± 21.4 (mean ± standard deviation) µmol m−2 h−1 and − 2.9 ± 11.6 µmol m−2 h−1
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The “mosco” (Hemiptera: Corixidae and Notonectidae) of Lake Cuitzeo, Mexico: an unusual inland water fishery Limnology (IF 1.625) Pub Date : 2019-08-26 Sonia González-Santoyo; Javier Alcocer; Luis A. Oseguera
Lake Cuitzeo is Mexico’s second-largest lake (~ 425 km2). The West Basin is shallow, seasonally astatic and alkaline, and it contains saltwater; it is in this extreme environment that there are fisheries maintained by local fishermen that are based on non-conventional products. These products include the “mosco” (hemipteran water boatmen and backswimmers: Corixidae and Notonectidae), which has become
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Does the dispersal of fairy shrimps (Branchiopoda, Anostraca) reflect the shifting geographical distribution of freshwaters since the late Mesozoic? Limnology (IF 1.625) Pub Date : 2019-08-08 Hidetoshi Naganawa; Elena Yu. Naumova; Natalia N. Denikina; Ilya G. Kondratov; Elena V. Dzyuba; Atsushi Iwasawa
Order Anostraca (fairy shrimp of large branchiopods) is a primitive crustacean group, retaining ancient forms and ecology. The Holarctic family Chirocephalidae originated over 100 million years ago; it is a very long-lived freshwater taxon that has survived from the Mesozoic to the present. Thus, using this taxon as an indicator, we verified how the geographical distribution of freshwaters shifted
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Aquatic macroinvertebrate assemblages associated with two floating macrophyte species of contrasting root systems in a tropical wetland Limnology (IF 1.625) Pub Date : 2019-08-03 Carolina Vieira da Silva; Raoul Henry
Aquatic macrophytes play an important role in structuring biotic communities. A comparative study of macroinvertebrate community structures associated with Salvinia auriculata Aublet and Eichhornia crassipes (Mart.) Solms was conducted in a Brazilian wetland (São Paulo State) during two periods. Our working hypothesis is that the aquatic macrophyte with the highest root system biomass and volume (E
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