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Annales de Limnologie - International Journal of Limnology

Volume 56 (2020) (open volume)


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Status of fish biodiversity and fishing on Hau River, Mekong Delta, Vietnam 14

Fish biodiversity on Hau River was for the first time thoroughly investigated. One endangered and six vulnerable species were scarcely recorded, only 1-2 times a year among 176 species caught by 5 fishing gears. Trawl and trammel nets are destructive gears but commonly used in fishing. CPUE was found low and declining as in other areas of the Mekong River.

Published online: 04 June 2020
DOI: https://doi.org/10.1051/limn/2020012
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Effect of sample size on habitat suitability estimation using random forests: a case of bluegill, Lepomis macrochirus 13

This study revealed the influence of sample size on habitat suitability plot by random forest combined with partial dependence plot. Furthermore, we proposed a novel approach “averaged habitat suitability plot”, which enables us to assess habitat suitability even with a small sample size.

Published online: 04 June 2020
DOI: https://doi.org/10.1051/limn/2020010
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Influence of Daphnia magna and Ceratophyllum demersum on the control of algae under different phosphorus concentrations 12

Three species of water blooms algae from different phylum (Cyclotella sp., Microcystis aeruginosa, Chlorella vulgaris), zooplankton (Daphnia magna), and aquatic macrophyte (Ceratophyllum demersum) were selected to establish an aquatic microcosmic model, which was to facilitate quantitative study of the relationships between the concentrations of nitrogen or phosphorus and the three types of organism. The results of the study will provide an important reference for the control of water blooms.

Published online: 28 May 2020
DOI: https://doi.org/10.1051/limn/2020006
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Seasonal variation in functional composition and diversity of cladoceran zooplankton of a lotic eutrophic habitat from India 11

The work provides a first report on seasonal variation in the functional diversity of cladoceran zooplankton from an Indian eutrophic lotic habitat. Functional redundancy was the lowest during the months of high nutrient concentration with certain functional groups completely absent. Moina species were characteristically observed in such months

Published online: 04 June 2020
DOI: https://doi.org/10.1051/limn/2020011
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Effects of mancozeb on the testicular histology of the zebrafish (Danio rerio) 10

This study was designed to assess the mancozeb-induced histological alterations in the testis of zebrafish (Danio rerio). Mancozeb exposure caused severe pathological conditions such as seminiferous tubule disorganizations, degenerative spermatogenic cells and decreased count of sperms. These results suggest that mancozeb could interrupt the reproductive activity and decrease the fertilization ratio of zebrafish.

Published online: 27 May 2020
DOI: https://doi.org/10.1051/limn/2020009
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Land use change causes environmental homogeneity and low beta-diversity in Heteroptera of streams 9

Environmental change affected the beta-diversity of the Heteroptera and of Nepomorpha, also negatively affecting both Gerromorpha beta-diversity and richness. These results show that Gerromorpha is more sensitive to physical changes in streams caused by the loss of environmental integrity and deforestation.

Published online: 30 April 2020
DOI: https://doi.org/10.1051/limn/2020007
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Evaluation of Azadirachtin on Arthrospira plantensis Gomont growth parameters and antioxidant enzymes 8

To understand the effects of contamination of insecticides onphototrophs, and to determine the responses of these organisms against these chemicals are extremely important in understanding how the ecosystem is affected. Azadirachtin used as insecticide due to inhibiting growth of insects and preventing them feeding on plants and it contaminates to aquatic ecosystems. Azadirachtin effects to a phytoplanktonic organism as called Arthrospira platensis and creates oxidative stress in their cells.

Published online: 29 April 2020
DOI: https://doi.org/10.1051/limn/2020008
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Cladocera (Crustacea: Branchiopoda) from the state of Mato Grosso, Brazil - Biodiversity of Cladocera (Crustacea: Branchiopoda) from the state of Mato Grosso, Brazil: new records and species richness in hydrographic regions 7

We investigated the richness and species composition of cladocerans (Crustacea: Branchiopoda) in 50 lakes of the Pantanal from the state of Mato Grosso (Paraguay hydrographic region), Brazil. In addition, we cataloged the known cladoceran species in each hydrographic region (HR) of the state. We reported 17 new records, and suggested a greater sampling effort, especially in areas of the Amazon and Tocantins-Araguaia HRs.

Published online: 17 April 2020
DOI: https://doi.org/10.1051/limn/2020005
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Monitoring spatiotemporal variability of water quality parameters Using Landsat imagery in Choghakhor International Wetland during the last 32 years 6

Mapping the spatio-temporal distribution for Chl-a, SDT, and WST with remotely sensed data would be helpful for management of freshwater ecosystems (here the wetland). According to the results of this study, large changes in these parameters were observed in the Choghakhor wetland during the period 1985-2017 and reflect the ecological conditions in the wetland. Considering that this first study with a new approach to the region, it can be used as a comprehensive guideline for remote monitoring as a viable tool for monitoring wetlands.

Published online: 17 April 2020
DOI: https://doi.org/10.1051/limn/2020004
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Share of rushes in water uptake in shallow lakes in eastern Poland 5

We analyzed the impact of various factors on the transpiration process of selected species of emerged macrophytes in laboratory and field conditions. We showed what factors can increase or decrease this process and how important are helophytes in the lake's water balance.

Published online: 10 April 2020
DOI: https://doi.org/10.1051/limn/2020003
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Plankton characterization of alpine ponds: a case of study for the assessment of water quality in Serra da Estrela (Portugal) 4

This research focuses on the study of alpine ponds using an integrative approach (water chemistry, hydrological properties and communities' dynamics). Exploring the relations between abiotic factors and the planktonic communities, this work shows the inadequacy of current ecological quality assessment methods for lentic habitats in extreme environments and gives insights into future conservation concerns.

Published online: 24 March 2020
DOI: https://doi.org/10.1051/limn/2020001
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Nestedness of insect assemblages in agriculture-impacted Atlantic forest streams 3

The variation in the agricultural intensity that occurs in the riparian zones of Atlantic Forest streams generates more limnological variability. This environmental variability caused the nestedness of Ephemeroptera, Plecoptera and Trichoptera assemblages and reduction of taxonomic richness.

Published online: 24 March 2020
DOI: https://doi.org/10.1051/limn/2020002
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Correlational analyses of the relationships between altitude and carapace size of Ostracoda (Crustacea) 2

The relationship between ostracods body size and altitude was studied from 117 aquatic habitats of Mersin province (Turkey). 72.6% of the relationship between 12 ostracods and five environmental variables was explained. Water temperature and pH were the two most effective variables on the species. The mean length of right and left valves of the species were significantly different (p < 0.01, N=3980) at all altitudinal ranges. A strong tendency of changes in valve height with increasing altitude seems to be more prominent than the changes in length for some species.

Published online: 26 February 2020
DOI: https://doi.org/10.1051/limn/2019025
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Long-term wind induced internal response mechanisms at Meiliang Bay of large, shallow Lake Taihu 1

Wind is the key external driver playing vital role for internal ecosystem transitions. The decreased wind speeds along with slow directional switching intensifies algal blooms.The temporal trends of wind, temperature and Chl-a have been found highly connected at Lake Taihu. The changes in nutrients and lower mixing scenarios trigger the growth of Chl-a. The onshore lower winds help in formation of cyanobacterial colonies.

Published online: 24 January 2020
DOI: https://doi.org/10.1051/limn/2019026