International Journal of Limnology

This study shows how beaver digging activity can affect water body morphology and local biota under modern environmental conditions in a small floodplain lake. The results confirm that the beaver-created heterogeneity is important for aquatic biota under conditions of shallowing of floodplain water bodies.

This paper investigates the variation of the phytoplankton community and its interaction with environmental parameters in the Azad Dam Lake in Iran. We show that the diversity index was low, pointing out a high level of Bacillariophyta dominance. Moreover, environmental variables show significant relationships with phytoplankton abundance.

In this research, the distribution of black fly species and their relationships with environmental variables were investigated in various streams in the Eastern Black Sea Region. Since there are very few studies on the Simuliidae in the region, which is one of the biodiversity hotspots, our research findings will provide important contributions to biomonitoring and biodiversity conservation studies.

This study proved the positive effect of jute mattingson growth control of native and invasive macrophytes in shallow clear-water ponds. Result also showed significant interaction among jute density and time on abundance and length of Elodea and Myriophyllum fragment.

This work provides the first information about feeding habits, trophic ecology and trophic interactions of all examined species(Planiliza parsia, Planiliza planiceps, Mugil cephalus and Chanos chanos) from Cochin Estuary. The result of this work differs from the hypothesis related to omnivorous fishes and concludes that these four omnivorous species live in the same niche zones of the Cochin Estuary with no interspecific conflict. This work will help to give light to the trophic interaction of this species and helps to formulate sustainable resource management.

In central France, the observed decline in the number and size of Galba truncatula and Omphiscola glabra populations still continued between the two study periods: 2013-2017 and 2020-2021. This decline may be due in part to heatwave episodes s that occurred in 2018, 2019 and 2020 in this region.

This current study applied metagenomics study approach to determining the microbial community diversity and functions across sediment regimen (clay [NT], sandstone [FS] and salt-bearing [SY]) of the East Taijinar Salt Lake, China. The result indicated that:

i. members of Actinobacterium did not exhibit variability across the sediment types while members of Firmicutes and Proteobacteria showed some variabilities, and had highest dominance in clay (NT) and sandstone (FS) sediment type as compared to the salt-bearing (SY) sediment type. Based on UniFrac, STAMP analyses there was significant differences (P < 0.05), with the weighted-UniFrac approach indicating the highest abundance under the clay sediment type.

ii. According to NMDS analysis, there was closer similarity in microbial composition between the clays sediment type (NT) and sandstone (FS).

iii. Furthermore, through the cladogram, it was visualized that there was very low representation of bacterial species from the salt-bearing (SY) sediment type as compared to other sediment types.

iv. More COG and KEGG pathways were dominant under the clays (NT) sandstone (FS) sediment types as opposed to the salt-based (SY) sediment type.

Based on this result, in-depth studies on spatial and temporal variability in microbial community diversity and eco-genomics functions across the sediments of the East Taijinar Salt Lake is recommended.

The paper examined changes in the activity of Class III Peroxidase (POX) and polyphenol oxidase (PPO) in Phragmites australis (Cav.) Trin. Ex Steud. Utricularia vulgaris L. and Salvinia natans (L.) from two sites on Bardača wetland during one vegetation season (June-September). The results showed differences in POX and PPO activities between emergent, submersed and floating plants, depending on both the sampling period and the site. The obtained differences in enzyme activities are probably a reflection of the influence of different types of abiotic stress on plants in their natural habitat, but also specific adaptive characteristics of each of the investigated species. The obtained results indicate that the activities of POX and PPO in examined water macrophytes can be used as bioindicators of environmental conditions.

Odonata assemblages of a lotic ecosystem were analysed. Five different species were identified. Grouping of assemblages showed association with woody debris. Five water quality parameters were significant in determining Odonata assemblages. Results showed that Odonata abundances are strongly affected by river modifications.

This paper evaluates changes in the β-temporal diversity and species composition of aquatic Oligochaeta in an impacted urban river stretch. We show that changes in abiotic conditions might cause differences in species composition between years, leading to a reduction in β-temporal diversity. Thus, our results support the idea that Oligochaeta are indicators of environmental variations.

One key finding of this work is that the studied population seems to be well adapted to its harsh semi-arid environment. Even in an intermittent river, Sylviocarcinus pictus, apparently, manages to keep a continuous breeding pattern, also documented for species from temperate regions of the globe.

The effects of microcystin-LR (MC-LR) on colony formation of Chlorella vulgaris induced by the submerged macrophyte Potamogetom crispus were evaluated. The study provides more insights on the interspecific interactions between submerged macrophyte and green algae in the eutrophic cyanotoxin-contaminated ecosystems.

16 ostracods are new records for Giresun. Distribution and co-occurrences of some species varied among habitats. The means of water temperature, electrical conductivity, and elevation were different in the northern region than the south. CCA explained 72.5% of the relationship between species and four variables. Copper, aluminum, silver and technetium were found on the carapace.

This study demonstrates the possibility to simulate salinity changes in the mesocosm systems for understanding and predicting phytoplankton community composition variation in natural aquatic ecosystems under rapid and prolonged saline intrusion rates which associate with potential impacts on food webs as well as aquaculture systems.