Our results showed theimportant diversity of Maghreb despite the scarcity of fresh waters and the weak knowledge on this area. We highlighted a very high rate of endemism with 52% of species occurring at on only 1 or 2 sites. We found enough data to discuss some hypotheses about the factors underlying this endemism and the biogeographical origin of species.
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Annales de Limnologie - International Journal of Limnology
Volume 55 (2019) (not complete)
Except for the highest mixing intensity group (1.28 m s−1), the colony sizes and growth rate of M. aeruginosa in mixing intensity groups (0.16, 0.32, 0.64 m s−1) was significantly higher than those in controls. This study suggested that modest mixing can significantly influence colony size and the growth of M. aeruginosa in freshwater ecosystem.
Ecological characterizations of the sampling stations were introducedby TIT–Trophic Index Turkey, TI–Trophic Index, and EPI-D–Eutrophication and/or Pollution Index-Diatom. Trophic index Turkey tested in this study provides information about assessment of surface watersin the south-east of the Gaziantep catchment (Turkey). Comparedto EPI-D, TIT was more competitive and had significantpositive correlation with P-PO4. Trophic Index Turkey could be a useful biological metricfor freshwater monitoring.
Effects of waterborne luteinizing hormone and follicle-stimulating hormone on reproduction of the rotifer Brachionus calyciflorus (Monogononta: Brachionidae) 10
The impact of endocrine disrupting compounds (ECDs) on aquatic biota it is complex. In rotifersLH induces the production of males, whereas FSH does not; the abnormal cohort of rotifers descended from LH does not reproduce while that of FSH does, LH does produces cysts while FSH does not during 4-day exposure.
Using multiple indicators to assess spatial and temporal changes in ecological condition of a drinking water reservoir in central China 9
The modified Carlson trophic status index, Shannon diversity index, and phytoplankton functional group index were used to assess ecological condition of a drinking water reservoir in central China. Applying all three indices together yielded a comprehensive ecological assessment, which could do so for other similar reservoirs.
Reproductive biology of thin sharpbelly, Toxabramis swinhonis Günther, 1873 in a shallow lake (Biandantang Lake) along the middle reach of the Yangtze River basin (China): implications for fisheries management 8
Overall sex ratio of T. swinhonis was 1.03:1, not significantly different from 1:1. T. swinhonis was a spring-summer (March–August) multiple spawner with indeterminate fecundity. Sizes at first maturity for female and male were 84.47 and 81.86 mm, respectively. To catch T. swinhonis or release its predator is proposed for population control.
Effects of toxic cyanobacterium Microcystis aeruginosa on the morphology of green alga Chlorella vulgaris 7
Pascal Laffaille takes great interests in fish ecology, especially focusing on the responses of fish populations and communities to anthropogenic disturbance. His current studies are aimed to propose management action plans.
The increasing of maximum lake water temperature in lowland lakes of central Europe: case study of the Polish Lakeland 6
The study showed significant changes in the maximum annual water temperatures in post-glacial lakes located in Poland in the years 1971-2015. The highest rate of increase in monthly maximum water temperature was recorded in April and the lowest in January and February. The value of maximum water temperature trends was lower than annual air temperature trends.
Nitrate-copper mix within legal limits resulted on higher zooplankton abundance by the end of the experiment. It is explained by nutrient enhancement what may counterbalance the copper toxicity on zooplankton, most likely increasing phytoplankton availability. Consequently, studies on assumed safe toxicant mixtures are needed as subtle effects can have relevant consequences on communities.
Internal phosphorus loading as the response to complete and then limited sustainable restoration of a shallow lake 4
This article relates to variability of the internal loading process, both seasonal and spatial in years 2011-2016, to determine the impact of sustainable restoration. It has been shown that the commencement of restoration intensifies the release of phosphorus from sediments. It was gradually reduced in subsequent years, even after limiting the treatments.
Eleven agrochemicals tested on a microalga included a safener added in specific agrochemical formulations. One molecule was 2-fold more toxic than the mixture of all compounds. The safener decreased the toxicity of this herbicide that contains a halogen atom.
Competition between Brachionus calyciflorus and Brachionus angularis (Rotifera) in relation to algal food level and initial population density 2
At the low food level, Brachionus angularis outcompeted B. calyciflorus and vice versa at the high food level. At the intermediate food level, B. angularis was displaced by B. calyciflorus at nearly all the initial inoculation densities except for 75% B. angularis at which both species coexisted.
Factors affecting aquatic beetle communities of Northern Western Ghats of India (Arthropoda: Insecta: Coleoptera) 1
The environmental factors altitude, salinity, hydroperiod and depth of water body affect the distribution of aquatic beetles in Northern Western Ghats, India. Some congeners showed different affinity to the altitude while some groups of different body forms co-occurred.