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Annales de Limnologie - International Journal of Limnology

Volume 57 (2021) (open volume)


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Effects of acute triclosan exposure on gill and liver tissues of zebrafish (Danio rerio) 6

Triclosan (TCS) is a broad-spectrum antimicrobial agent found in personal care, household, veterinary, medical, and industrial products. TCS has been detected in soil, sediment, and surface water. In the current work, the effects of acute exposure to TCS on gill and liver tissues of zebrafish were evaluated and the results indicated that TCS caused distinct histopathological alterations.

Published online: 08 February 2021
DOI: https://doi.org/10.1051/limn/2021004

Fungal richness does not buffer the effects of streams salinization on litter decomposition 5

The depressive effect of salinization on detritus processing in streams overrides the potential buffer capacity of aquatic hyphomycetes higher richness, main drivers of litter decomposition. These findings, suggest that this stressor is as worldwide threat for stream ecosystem functioning independently of the fungal species abundance.

Published online: 08 February 2021
DOI: https://doi.org/10.1051/limn/2021003
Open Access

Aquarium trade and fish farms as a source of non-native freshwater fish introductions in French Guiana 4

Investigating freshwater fish introductions in French Guiana revealed the presence of 11 non-native species. Four are established and one is rapidly increasing its spatial range. Five other species are known from few specimens, but belong to highly invasive species, making those first occurrences an early warning for potential establishment and spread.

Published online: 08 February 2021
DOI: https://doi.org/10.1051/limn/2021002

Bottom-up and top-down effects on phytoplankton functional groups in Hulun Lake, China 3

This study examines the effects of bottom-up (physical-chemical) and top-down (predation) factors on the phytoplankton functional groups in a eutrophic lake. The study revealed that the bottom-up effects of physical-chemical variables on some phytoplankton functional groups was stronger than the top-down effects of zooplankton. The study further showed that zooplankton functional groups were positively correlated with phytoplankton biomass implying that the top-down control of phytoplankton by the zooplankton in Lake Hulun is not strong enough to produce a negative effect. These finding serve as a basis for identifying how phytoplankton dynamics are influenced, which have implications for developing sustainable management strategies and conserving services of Lake Hulun and other eutrophic fresh water lakes.

Published online: 19 January 2021
DOI: https://doi.org/10.1051/limn/2020028

Effect of environment on functional traits of co-occurring water beetles 2

Our study on trait-environment relationship of co-occurring water beetles in anthropogenic ponds revealed that submerged vegetation, odonate nymphs, calcium hardness, salinity and chironomid larvae affected body size, swimming traits and functional feeding groups of the beetles in assemblages.

Published online: 07 January 2021
DOI: https://doi.org/10.1051/limn/2020030

Impacts of phosphorus loads on the water quality and the proliferation of harmful cyanobacteria in Foum-Gleita Reservoir (Mauritania) 1

The exploitation of phosphate mines contributes to the eutrophication of the Foum-Gleita reservoir (Mauritania), leading to the appearance of cyanobacterial blooms. Microcystis aeruginosa and Dolichospermum flos-aquae are the two dominant species during the hot season (May to September), and only the microcystin-LR congener was detected for the first time in a freshwater ecosystem in Mauritania with a peak at 3.55 μg L−1.

Published online: 07 January 2021
DOI: https://doi.org/10.1051/limn/2020029