Annales de Limnologie - International Journal of Limnology

Freshwater bivalves are often exposed to drought and are highly affected due to their limited mobility. According to the results, the presence of moist sediment during droughts provide protection for the bivalve species used in the study and extended survival durations. Additionally, no evidence was found regarding the effect of size on survival.

Tightly cell-bound extracellular polysaccharides (TB-EPS) enhanced colony formation of Microcystis aeruginosa NIES-843, which is strictly related to buoyancy. Microscope observation shows the colony induced by TB-EPS likes wild Microcystis. Temperature and light affected colony formation and buoyancy.

This study aims to determine the toxicity of Lambda cyhalothrin may cause in cyanobacteria, one of the primary producers in lake ecosystems. According to our results, we may conclude that Lambda cyhalothrin inhibited the growth of A. platensis and it caused oxidative stress in the organism.

The Coad barb, Capoeta coadi Alwan, Zareian and Esmaeili, 2016, is a newly described endemic fish in Beheshtabad River, Tigris basin of Iran. Tigris basin not only is one of the largest and most important basins of Iran, but also of the Asia and Middle East. However, there is no information on the biology of this fish. In this study we determined some growth characteristics of C. coadi including the age and size compositions, sex ratio, growth pattern, length-weight relationship, von Bertalanffy growth model and growth performance index, in Beheshtabad River, a tributary of Karun River in Tigris basin. This information provide the basic data for management, conservation and possibly aquaculture of this fish in the region.

This study provided a zooplankton species list from 180 lakes in northeastern Brazil and showed that species distribution, richness and composition vary according to biome (Atlantic Forest or Caatinga), the lake origin (natural or man-made lakes), and the lake habitat (pelagic or littoral).

The Cenote Jennifer is a lentic sinkhole with brackish to euhaline water. It is an oligotrophic system with very low productivity. Special care should be taken in sustainable and scientific use of this sinkhole.

M. spicatum and C. demersum exposed to different salinity levels in a laboratory study. Two species exhibited species-specific salinity sensitivities reaching different physiological statuses at each salinity level. Elongation rates were correlated with several biochemical parameters. These correlations can be used in evaluating the expected responses of two species to salinity.

Intra-annual fluctuations dominated temporal dynamics of benthic diatom communities. Moreover, component species within the communities displayed distinct dynamics and were driven by different environmental variables. Our findings provide new insights to community dynamics in stream ecosystems.

This work allows us to know the morphological and behavioral feeding characteristics of Cloeon dipterum, assign it a Functional Feeding Group and establish possible trophic relationships with other organisms in the aquatic ecosystems of Buenos Aires (Argentina).

Zooplankton was found to change proportionally with salinity changes in the Mekong Delta (MD) estuarine areas. Rotifera and Cladocera were inversely proportional while Protozoa and Copepoda were positively proportional to salinity. This first time ever findings can be applied to predict change in biological productivity of the estuarine ecosystem in the MD.

Amphibians are major members of aquatic and terrestrial ecosystems. They serve as both predator and prey in both ecosystems. Therefore, they provide the transfer of energy between these systems. However, there are few studies on the gametogenesis of amphibian. Therefore, histological characteristics of Pelophylax bedriagae testes were studied.

The occurrence of M. aeruginosa bloom in two freshwater ponds along central Kerala has been addressed along with the variations in the hydrobiological characteristics of the ecosystem during bloom and non-bloom conditions of the species. Histological studies highlight hepatotoxicity of M. aeruginosa signifying regular monitoring of bloom events in these ecosystems.

The Melloulou River presented 161 invertebrate taxa, most new for northeast Morocco. Multivariate analyses showed an invertebrate distribution governed by altitude, slope and current velocity in a highly flow dynamic. Three assemblages and a great number of ubiquitous taxa were also found. These findings are of crucial concern for managing actions.

As the first study investigating the effects of WTP discharges on the stream metabolism in Turkey, the results were compared with the previous studies in the literature. The study demonstrated that the WTP discharges increased the mean R_c from −30.6 g O₂ m⁻² day⁻¹ to −130.9 g O₂ m⁻² day⁻¹, and had no significant impact on the mean GPP, statistically (15.6 and 9.1 g O₂ m⁻² day⁻¹ before and after discharges, respectively). Furthermore, the study aimed at statistical modelling the metabolism rates as a function of measured environmental variables. The multiple non-linear regression models of NEM and R_c were derived with high validations (R² of 74.9% and 66.6%, respectively).

In the genus Rhyncholimnochares, eleven species new to science are described from running waters in Brazil, Chile, Costa Rica and Ecuador; R. lamellipalpis Lundblad, 1936 is recorded for the first time from Chile. A determination key is given for all known species at the adult/deutonymphal stage.

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.

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.

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.

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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.