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Annales de Limnologie - International Journal of Limnology

Volume 54 (2018) (not complete)


Influence of environmental factors on vertical distribution of zooplankton communities in humic lakes 17

Studies in five productive humic lakes of low fish pressure indicated that taxonomic groups of zooplankton are determined by a different set of environmental variables, which explains very low species richness of zooplankton. Due to sharp thermal gradient in the lakes biomass of herbivores is reduced which promotes development of phytoplankton.

Published online: 18 April 2018
DOI: https://doi.org/10.1051/limn/2018004

Effects of food concentration on the life table demography and morphology of three Keratella quadrata morphotypes 16

K. quadrata with two, one and none posterior lateral spines (2PS, 1PS and 0PS) did not show any preference to food level. The 0PS morphotype had less fitness than 2PS. Despite the morphotype of rotifer parent, the major morphotype of offsprings was 2PS. Food level might affect the ratio of 2PS and 1PS offsprings reproduced by 0PS and 1PS rotifer parents.

Published online: 17 April 2018
DOI: https://doi.org/10.1051/limn/2018006

The longitudinal pattern of crustacean (Peracarida, Malacostraca) assemblages in a large south European river: bank reinforcement structures as stepping stones of invasion 15

Distribution of 14 Peracarida species (5 native and 9 alien) along entire course of the Sava River was established: only natives inhabited the upper third of Sava and aliens dominated the rest of the course. Artificial stony substrates act as stepping stones of invasion for alien peracarids and largely contribute to their success in large lowland rivers.

Published online: 17 April 2018
DOI: https://doi.org/10.1051/limn/2018008

Zooplankton communities in Mediterranean temporary lakes: the case of saline lakes in Cyprus 14

This is the first whole-community study of zooplankton communities in temporary saline lakes in Cyprus. Our results support that in these systems (a) salinity is a major driver of zooplankton community and (b) should be a key factor for typological considerations according to the WFD; (c) zooplankton should be considered as biological quality element.

Published online: 05 April 2018
DOI: https://doi.org/10.1051/limn/2018007

Asplanchna-kairomone induces life history shifts in Brachionus angularis (Rotifera) 13

Kairomone released by higher densities of Asplanchna increased significantly the level of sexual reproduction of parental B. angularis females which might help the preys avoid the predator in time instead of facing the enemy through defenses, and the intrinsic rate of population increase that might facilitate the coexistence of preys with predators.

Published online: 05 April 2018
DOI: https://doi.org/10.1051/limn/2018005

Abiotic factors, not herbivorous pressure, are primarily responsible for the performance of an invasive aquatic plant 12

We provide evidences that the performance of the invasive macrophyte Egeria densa is more associated with abiotic factors than herbivory in its native (Brazil) and introduced range (France), indicating that environmental variables are probably the main drivers of its success in different habitats.

Published online: 16 March 2018
DOI: https://doi.org/10.1051/limn/2018002
Open Access

Galba truncatula and Omphiscola glabra (Gastropoda, Lymnaeidae): present decline in populations living on sedimentary soils in central France 11

Compared to values recorded before 1998 in 57 farms located in three French natural regions, the numbers of snail populations observed in 2016 and 2017 were significantly lower, with an overall decline rate of 30.8% for Galba truncatula and 38.6% for Omphiscola glabra over the past 20 years.

Published online: 16 March 2018
DOI: https://doi.org/10.1051/limn/2017035

Does the use of various population parameters affect fish assemblage structures? 10

Regularly published works devoted to fish assemblage structures are constructed from three population parameters: species number, relative number or relative biomass. The last one is the most similar to the estimated by the relative caloric content of biomass (wet weight), i.e. the best indicator of the strength and importance of a population in nature.

Published online: 13 March 2018
DOI: https://doi.org/10.1051/limn/2017034

Long-term effects of temperature and nutrient concentrations on the phytoplankton biomass in three lakes with differing trophic statuses on the Yungui Plateau, China 9

Pascal Laffaille specially takes interest in and makes a significant contribution to explain or predict the response of fish populations and communities to anthropogenic disturbance. And meanwhile, his researches also concentrate on ecological consequences of the decline of fish diversity in aquatic ecosystems. The relevant studies provide much knowledge and basis for proposing management action plans in aquatic ecosystems.

Published online: 13 March 2018
DOI: https://doi.org/10.1051/limn/2017031

Morphological and growth responses of two green algal strains to toxic Microcystis are dependent on the cultivation growth phase of filtrate and target strain 8

Pascal Laffaille specializes in fish ecology and makes a significant contribution to explain or predict the response of fish populations and communities to anthropogenic disturbance. The relevant studies have provided key theoretical basis for proposing management action plans in aquatic ecosystems.

Published online: 01 March 2018
DOI: https://doi.org/10.1051/limn/2018003

Environmental warming induces behavioral and metabolic changes in a freshwater crustacean − aeglids as a model organism 7

Climate change has the potential to modify ecological process and life aspects of the aquatic community in small-order streams. We evaluated and found changes in behavior and metabolism of Aegla longirostri at different temperatures (21 °C and 24 °C). Thus, the future increase temperature of the streams will impact the aeglid's populations.

Published online: 01 March 2018
DOI: https://doi.org/10.1051/limn/2017032

Dynamics of small-sized Cladocera and their algal diet in lake with toxic cyanobacterial water blooms 6

Blooms of toxin-producing cyanobacteria affect abundances of small Cladocera and their algal diet. Small Cladocera show selectivity for small cryptophytes, diatoms and chlorophytes. High tolerance to cyanobacterial toxins and selective feeding allow to permanent co-existence of small Cladocera with cyanobacterial blooms.

Published online: 01 March 2018
DOI: https://doi.org/10.1051/limn/2018001

Finite volume coastal ocean model for water-level fluctuation due to climate change in Aguelmam Sidi Ali Lake (Middle Atlas, Morocco) 5

Climate change is expected to cause significant changes to the hydrology of lakes, reservoirs and other wetlands. In particular, there will be an increase in the level of disturbance produced by water-level fluctuations. An unstructured grid, finite volume model has been used to simulate the water level of Aguelmam Sidi Ali Lake (Morocco), with observed field data being used for model calibration and validation. The different hydrological conditions regarding lake input and output data were tested and water depth was calculated using bathymetry to predict water-level fluctuations in the future. The results predict that the water-level will decrease continuously. The lake will be dried up in about 20 years if very dry conditions continue in the region. Finally, the main objective of this simulation method is to accelerate and facilitate of systems' behavior learning in the current and future situation.

Published online: 13 February 2018
DOI: https://doi.org/10.1051/limn/2017033

Accumulation and seasonal variation of toxic and trace elements in tissues of Cyprinus carpio from semi-intensive aquaculture ponds 4

We analyzed toxic and trace elements in carp from fish ponds. Fish liver was the main target organ for accumulation of Cu, Se and Zn, and dorsal muscle for Sr and Li. Fish liver showed a decrease of a range of elements towards the end of season. Arsenic was uniformly distributed in fish organs showing potential to build up in edible parts.

Published online: 13 February 2018
DOI: https://doi.org/10.1051/limn/2017036

Are cyanobacteria total, specific and trait abundance regulated by the same environmental variables? 3

This study showed that, in absence of nutrient limitation, some variables such as temperature are relevant to all organization levels, whereas some others like light availability have an effect on temporal distribution patterns of the dominant species.

Published online: 04 January 2018
DOI: https://doi.org/10.1051/limn/2017030

Thermal response of Moroccan lakes to climatic warming: first results 2

Water temperature plays a primary role in controlling a wide range of physical, geochemical and ecological processes in lakes, with considerable influences on lake water quality and ecosystem functioning. In this work, we report on the ability of the one-dimensional lake model to simulate the water temperature of Moroccan Lakes, affected by climate change for the first time. During the study periods, two variables are studied, the epilimnion and metalimnion temperatures. The results show good agreement with water temperature observations that suggests that the predictive model can be used to obtain a first-order estimation of water temperature in Moroccan Lakes. Hence, it is possible to apply this model in other Moroccan Lakes to simulate the behavior of temperature and to investigate the potential future warming of the water column in Lakes, affected by climate change.

Published online: 04 January 2018
DOI: https://doi.org/10.1051/limn/2017029

Effect of bottom sediments on the nutrient and metal concentration in macrophytes of river-lake systems 1

Our research concerns functioning of the river-lake system through an analysis of factors affecting the assimilation of biogenes and metals by aquatic plants typical for such a system. The greatest effect on the accumulation of an excessive amount of substances like nutrients and heavy metals occurring in the water ecosystem of the river and lake system seems to be demonstrated by the properties of the bottom sediments, mainly their granulometric composition. On the other hand, it was demonstrated that aquatic plants can have an effect on the fraction size in sediments, particularly near the outlet of the river to the water body.The obtained results could contribute to the creation of controlled conditions favouring contamination capture, which could a ffect the advancement of knowledge concerning the functioning of freshwater aquatic ecosystems.

Published online: 04 January 2018
DOI: https://doi.org/10.1051/limn/2017028