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International Journal of Limnology

Volume 58 (2022) (in progress)


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Microbial community diversity and eco-genomics functions across sediment regimen of a saline lake 10

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.

DOI: https://doi.org/10.1051/limn/2022008

Class III peroxidase and polyphenol oxidase activities in aquatic macrophytes during vegetative period in Bardača a wetland 8

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.

DOI: https://doi.org/10.1051/limn/2022009

Determining effective environmental factors and ecology of non-marine Ostracoda (Crustacea) in Giresun, Turkey 3

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.

DOI: https://doi.org/10.1051/limn/2022002

Phytoplankton community composition variation under natural and prolonged saline intrusion simulations 1

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.

DOI: https://doi.org/10.1051/limn/2022001