Annales de Limnologie - International Journal of Limnology

An international journal of basic and applied freshwater research

Editor-in-Chief: Pascal Laffaille
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ISSN: 0003-4088 - eISSN: 2100-000X

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  • First description of immature stages and adult females of Stilobezzia (Acanthohelea) megatheca (Diptera: Ceratopogonidae) from Patagonia

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    Larva, pupa and adult female of Stilobezzia (Acanthohelea) megatheca are described. This is the first description of immature stages on the subgenus Stilobezzia (Acanthohelea) from the Neotropical region. Data on the bionomics of the species and a key to Neotropical pupae of Stilobezzia are provided.

    Ann. Limnol. - Int. J. Lim., 53 (2017) 175-188
    Published online: 16 March 2017
    DOI: https://doi.org/10.1051/limn/2017005
  • The effects of food level on the life history variables of the two closely related rotifer species Keratella tropica and Keratella valga

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    Keratella tropica had longer duration of pre-reproductive and reproductive periods, average lifespan, life expectancy at hatching and generation time, and higher net reproductive rate than K. valga. In subtropical lakes, the higher density of K. tropica might be attributed to its longer lifespan and higher reproductive rate.

    Ann. Limnol. - Int. J. Lim., 53 (2017) 153-160
    Published online: 03 March 2017
    DOI: https://doi.org/10.1051/limn/2017002
  • Discriminating permanent from temporary rivers with traits of chironomid genera

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    Chironomidae assemblage and its traits allowed the segregation of stream types, reflecting streams natural environmental diversity and their potential for bioassessment. Observable morphological traits, related with functions of Chironomidae in the system, are particularly useful to this segregation avoiding their taxonomic identification.

    Ann. Limnol. - Int. J. Lim., 53 (2017) 161-174
    Published online: 03 March 2017
    DOI: https://doi.org/10.1051/limn/2017004
  • Limnophase versus potamophase: how hydrological connectivity affects the zooplankton community in an oxbow lake (Vistula River, Poland)

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    The impact of river hydrology on the oxbow lake was studied. Potamophase brought greater zooplankton diversity. Limnophase with higher water temperature led to greater zooplankton density but its diversity decreased. In recent years, probably due to climate change, water level in rivers is low and potamophase is rare. Oxbows remain isolated what is the cause biodiversity reducing.

    Ann. Limnol. - Int. J. Lim., 53 (2017) 143-151
    Published online: 27 February 2017
    DOI: https://doi.org/10.1051/limn/2017001
  • Spatial heterogeneity and seasonal succession of phytoplankton functional groups along the vertical gradient in a mesotrophic reservoir

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    This study based on analysis from vertical profiles of phytoplankton FGs (both on a morphology-based approach and according to the functional groups), their relative biomass, physical and chemical parameters, through monthly samplings over a two years period, at three stations located along the longitudinal axis in the monomictic, mesotrophic Mediterranean reservoir. Nutrient dynamics, temperature and light availability were mainly driven by the water circulation patterns, governing the phytoplankton morphological variability (C→S→R) in İkizcetepeler reservoir. Nutrient availability and temperature constituted the main environmental constraints influencing phytoplankton dynamics, while zmix/zeu ratio played a secondary role. A similar conclusion for mesotrophic lakes was achieved by Naselli-Flores (2000) by studying 21 Sicilian man-made lakes. Despite the variations in zmix/zeu ratio as a result of stratification vs. mixing events and water withdrawal, C-strategists were typical representatives of phytoplankton assemblage. Groups Y, P, B, J, F, Lo and Tc showed heterogeneous distribution along the water column and vertical heterogeneity of phytoplankton was affected by nutrients (especially DIN values), temperature and zmix/zeu values which were mainly driven by the water circulation pattern. The results show that phytoplankton morphological spectrum throughout the entire water column, contributes useful information to assess the influence of mixing and trophic state on phytoplankton dynamics in mesotrophic reservoirs.

    Similar studies about phytoplankton structure along the vertical gradient at seasonal time scales are not so detailed, and, to our knowledge, vertical distribution of phytoplankton functional groups was not investigated in Mediterranean reservoirs and only a short term study (Becker et al., 2009b) and a long term one (Crossetti and Bicudo, 2008) were performed in tropical Brazilian reservoirs. Therefore, our results provide evidence on vertical heterogeneous distribution of phytoplankton functional groups in mesotrophic Mediterranean reservoir, allowing for a deeper understanding of the role of different groups in such systems.

    Ann. Limnol. - Int. J. Lim., 53 (2017) 129-141
    Published online: 22 February 2017
    DOI: https://doi.org/10.1051/limn/2016040